Page 1 ..OVERALL ELECTRICAL WIRING DIAGRAM ..Y2002 All rights reserved. This book may not be reproduced or copied, in whole or in part, without the written permission of Toyota Motor Corporation. 2003 TOYOTA TUNDRA (EWD491U)
Page 2 Wiring related to each system is indicated in each system circuit by arrows (from__, to__). When overall connections are required, see the Overall Electrical Wiring Diagram at the end of this manual. 2003 TOYOTA TUNDRA (EWD491U)
Page 3 PPPP @@@@ PPPP @@@@ PPPP @@@@ PPPP @@@@ PPPP @@@@ PPPP REAR LIGHTS WARNING LIGHT [COMB. METER] STOP LIGHT SW G–W TO ABS ECU LIGHT FAILURE SENSOR DELAY CIRCUIT G–R (SHIELDED) HIGH MOUNTED STOP LIGHT W–B 2003 TOYOTA TUNDRA (EWD491U)
Page 4 ”E” for the section is shown in square brackets [ Engine Compartment, ”I” for the Instrument Panel and Surrounding area, and ”B” for the Body and Surrounding area. [N] : Page No. 2003 TOYOTA TUNDRA (EWD491U)
Page 5 See Page Ground Points Location Under the Left Quarter Pillar Back Panel Center : SPLICE POINTS Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points Cowl Wire Luggage Room Wire 2003 TOYOTA TUNDRA (EWD491U)
Page 6 [V] : Indicates the reference page showing the position of the splice points on the vehicle. Example : Splice point ”I5” is on the Cowl Wire Harness and is described on page 44 of this manual. 2003 TOYOTA TUNDRA (EWD491U)
Page 7 WOOFER AMPLIFIER W–B COMBINATION METER HEATER RELAY AUTO ANTENNA COMBINATION METER MOTOR FUEL SENDER ∗ The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION. 2003 TOYOTA TUNDRA (EWD491U)
Page 8 15A TAIL STARTER RELAY W–B 20A DEFOG B–Y W–R B–W 15A RAD CIG B–Y P–L ∗ The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION. 2003 TOYOTA TUNDRA (EWD491U)
Page 9 The first letter of the code is taken from the first letter of part, and the numbers indicates its order in parts which start with the same letter. [D] : Connector Color Connectors not indicated are milky white in color. 2003 TOYOTA TUNDRA (EWD491U)
Page 10 [B] : Part Name [C] : Part Number Toyota Part Number are indicated. Not all of the above part numbers of the connector are established for the supply. In case of ordering a connector or terminal with wire, please confirm in advance if there is supply for it using Parts Catalog News”...
Page 11 When contacting the two leads in reverse, there should be no Ohmmeter continuity. Diode (c) Use a volt/ohmmeter with high impedance (10 kΩ/V minimum) for troubleshooting of the electrical circuit. Digital Type Analog Type 2003 TOYOTA TUNDRA (EWD491U)
Page 12 To pull apart the connectors, pull on the connector itself, not the wire harness. HINT : Check to see what kind of connector you are disconnecting before pulling apart. Pull Up Pull Up Press Down Press Down 2003 TOYOTA TUNDRA (EWD491U)
Page 13 Raise the terminal retainer up to the temporary lock position. [Retainer at Full Lock Position] Terminal Stopper Retainer [Retainer at Temporary Lock Position] ”Case 2” Open the secondary locking device. Secondary Example: Locking Device (Case 2) 2003 TOYOTA TUNDRA (EWD491U)
Page 14 Type which cannot be pulled as far as Example: Power Lock insert the tool straight into Terminal Retainer (Case 2) the access hole of terminal retainer as shown. Tool Tool Press Down Press Down [Male] [Female] 2003 TOYOTA TUNDRA (EWD491U)
Page 15 2. Insert the terminal until the locking lug locks firmly. 3. Insert the terminal with terminal retainer in the temporary lock position. (b) Push the secondary locking device or terminal retainer in to the full lock position. 5. CONNECT CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 16 Sequential Multiport Fuel Injection Supplemental Restraint System Switch TEMP. Temperature TVIP TOYOTA Vehicle Intrusion Protection Vacuum Switching Valve With Without ∗ The titles given inside the components are the names of the terminals (terminal codes) and are not treated as being abbreviations.
Page 17 A power unit which converts overloads, thereby protecting the circuit. electrical energy into mechanical The numbers indicate the crosssection energy, especially rotary motion. surface area of the wires. (for High Current Fuse or Fusible Link) 2003 TOYOTA TUNDRA (EWD491U)
Page 18 (2) with a An electromagnetic coil which forms black dot or octagonal ( a magnetic field when current flows, (2) SPLICED mark at the junction are to move a plunger, etc. spliced (joined) connections. 2003 TOYOTA TUNDRA (EWD491U)
Page 19: Engine Compartment
F RELAY LOCATIONS [Engine Compartment] [Instrument Panel] 2003 TOYOTA TUNDRA (EWD491U)
Page 20 : Engine Room R/B Engine Compartment Left (See Page 20) 2003 TOYOTA TUNDRA (EWD491U)
Page 21 F RELAY LOCATIONS : Driver Side J/B and Lower Finish Panel (See Page 20) Integration Relay [w/o Daytime Running Light] 2003 TOYOTA TUNDRA (EWD491U)
Page 22 2003 TOYOTA TUNDRA (EWD491U)
Page 23 F RELAY LOCATIONS [Driver Side J/B and Integration Relay Inner Circuit] (w/o Daytime Running Light) 2003 TOYOTA TUNDRA (EWD491U)
Page 24 MEMO 2003 TOYOTA TUNDRA (EWD491U)
Page 25 F RELAY LOCATIONS : Driver Side J/B and Lower Finish Panel (See Page 20) Integration Relay [w/ Daytime Running Light] 2003 TOYOTA TUNDRA (EWD491U)
Page 26 2003 TOYOTA TUNDRA (EWD491U)
Page 27 F RELAY LOCATIONS [Driver Side J/B and Integration Relay Inner Circuit] (w/ Daytime Running Light) 2003 TOYOTA TUNDRA (EWD491U)
Page 28 MEMO 2003 TOYOTA TUNDRA (EWD491U)
Page 29 G ELECTRICAL WIRING ROUTING : Location of Connector Joining Wire Harness and Wire Harness : Location of Ground Points [2UZ–FE] : Location of Splice Points 2003 TOYOTA TUNDRA (EWD491U)
Page 30 Engine No.2 Wire and Engine Room Main Wire (Under the Engine Room R/B) Engine No 2 Wire and Engine Wire (Near the Starter) Engine No.2 Wire and Engine Wire (Near the Starter) Engine No.2 Wire and Differential Wire (Near the Transmission) 2003 TOYOTA TUNDRA (EWD491U)
Page 31 G ELECTRICAL WIRING ROUTING : Location of Connector Joining Wire Harness and Wire Harness : Location of Ground Points [5VZ–FE] : Location of Splice Points 2003 TOYOTA TUNDRA (EWD491U)
Page 32 Engine No.2 Wire and Engine Room Main Wire (Under the Engine Room R/B) Sensor Wire and Engine Wire (Over the Cylinder Head) Engine Wire and Sensor Wire (Over the Cylinder Head) Engine Wire and Differential Wire (Front Differential Upper Side) 2003 TOYOTA TUNDRA (EWD491U)
Page 33 G ELECTRICAL WIRING ROUTING : Location of Connector Joining Wire Harness and Wire Harness : Location of Ground Points 2003 TOYOTA TUNDRA (EWD491U)
Page 34 Joining Wire Harness and Wire Harness (Connector Location) Engine Room Main Wire and Cowl Wire (Left Kick Panel) Front Door LH Wire and Cowl Wire (Left Kick Panel) Cowl Wire and Roof Wire (Left Side of Instrument Panel) 2003 TOYOTA TUNDRA (EWD491U)
Page 35 G ELECTRICAL WIRING ROUTING : Location of Connector Joining Wire Harness and Wire Harness : Location of Splice Points 2003 TOYOTA TUNDRA (EWD491U)
Page 36 Cigarette Lighter Wire and Cowl Wire (Instrument Panel Brace LH) Engine Wire and Cowl Wire (Right Side of Instrument Panel) Front Door RH Wire and Cowl Wire (Right Kick Panel) Cowl Wire and Cowl Wire (Instrument Panel Reinforcement RH) 2003 TOYOTA TUNDRA (EWD491U)
Page 37 G ELECTRICAL WIRING ROUTING : Location of Connector Joining Wire Harness and Wire Harness : Location of Ground Points [Access Cab] : Location of Splice Points 2003 TOYOTA TUNDRA (EWD491U)
Page 38 Floor No.1 Wire and Rear Door No.1 Wire RH (Under the Right Quarter Panel) Cowl Wire and Seat No.1 Wire (Under the Driver’s Seat) Frame Wire and Frame No 3 Wire (Near the License Plate Light) Frame Wire and Frame No.3 Wire (Near the License Plate Light) 2003 TOYOTA TUNDRA (EWD491U)
Page 39 G ELECTRICAL WIRING ROUTING : Location of Connector Joining Wire Harness and Wire Harness : Location of Ground Points [Standard Cab] : Location of Splice Points 2003 TOYOTA TUNDRA (EWD491U)
Page 40 Frame Wire and Cowl Wire (Under the Front Passenger’s Seat) Cowl Wire and Seat No.1 Wire (Under the Driver’s Seat) Frame Wire and Frame No 3 Wire (Near the License Plate Light) Frame Wire and Frame No.3 Wire (Near the License Plate Light) 2003 TOYOTA TUNDRA (EWD491U)
Page 41 G ELECTRICAL WIRING ROUTING : Location of Connector Joining Wire Harness and Wire Harness 2003 TOYOTA TUNDRA (EWD491U)
Page 42 Connector Joining Wire Harness and Wire Harness (w/ Power Seat) Code Joining Wire Harness and Wire Harness (Connector Location) Cowl Wire and Seat No.1 Wire (Under the Driver’s Seat) Seat No.1 Wire and Seat No.2 Wire (Under the Driver’s Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 43 MEMO 2003 TOYOTA TUNDRA (EWD491U)
Page 44 D 2 Daytime Running Light Resistor H 7 Horn LH D 3 Detection SW (Transfer 4WD Position) H 8 Horn RH D 4 Detection SW (Transfer L4 Position) E 1 Electronically Controlled Transmission Solenoid E 2 Engine Coolant Temp. Sensor 2003 TOYOTA TUNDRA (EWD491U)
Page 45 (Electronically Controlled Transmission) J 18 Junction Connector V 4 VSV (EVAP) K 1 Knock Sensor 1 W 2 Washer Motor and Washer Level Sensor K 2 Knock Sensor 2 W 3 Water Temp. Sender W 4 Wiper Motor 2003 TOYOTA TUNDRA (EWD491U)
Page 46 C 1 Camshaft Position Sensor C 2 Crankshaft Position Sensor D 2 Daytime Running Light Resistor D 3 Detection SW (Transfer 4WD Position) D 4 Detection SW (Transfer L4 Position) D 5 Detection SW (Transfer Neutral Position) 2003 TOYOTA TUNDRA (EWD491U)
Page 47 K 2 Knock Sensor 2 V 4 VSV (EVAP) M 1 Mass Air Flow Meter W 2 Washer Motor and Washer Level Sensor W 3 Water Temp. Sender N 1 Noise Filter W 4 Wiper Motor 2003 TOYOTA TUNDRA (EWD491U)
Page 48 C 9 Clutch Start Cancel SW E 4 Engine Control Module C10 Clutch Start SW E 5 Engine Control Module C 11 Combination Meter E 6 Engine Control Module C12 Combination Meter E 7 Engine Control Module 2003 TOYOTA TUNDRA (EWD491U)
Page 49 T 5 Turn Signal Flasher J 23 Junction Connector T 9 Trailer Converter J 24 Junction Connector T 11 TVIP ECU T 12 TVIP ECU M 4 Mirror Heater SW T 13 TVIP ECU U 1 Unlock Warning SW 2003 TOYOTA TUNDRA (EWD491U)
Page 50 T 8 Tweeter RH I 26 Interior Light V 1 Vapor Pressure Sensor J 14 Junction Connector V 6 Vanity Light LH J 15 Junction Connector V 7 Vanity Light RH V 9 VSV (Canister Closed Valve) 2003 TOYOTA TUNDRA (EWD491U)
Page 51 H10 High Mounted Stop Light and Cargo Light T 6 Trailer Socket T 7 Tweeter LH I 26 Interior Light T 8 Tweeter RH J 14 Junction Connector V 1 Vapor Pressure Sensor J 15 Junction Connector V 9 VSV (Canister Closed Valve) 2003 TOYOTA TUNDRA (EWD491U)
Page 52 P 18 Power Seat Motor (Driver’s Seat Reclining Control) P 19 Power Seat Motor (Driver’s Seat Slide Control) L 3 Lumber Support Control SW (Driver’s Seat) P 20 Power Seat Motor (Driver’s Seat Lumber Support Control) 2003 TOYOTA TUNDRA (EWD491U)
Page 53 MEMO 2003 TOYOTA TUNDRA (EWD491U)
Page 54 4WD (5VZ–FE) ..............2003 TOYOTA TUNDRA (EWD491U)
Page 55 15A EFI NO. 1 B–R W–L W–L JUNCTION CONNECTOR EFI RELAY 40A ABS2 20A HAZ R–B ( * 4 ) 30A TOWING DIMMER RELAY W–G(* 3) H–LP RELAY G(*3) R–B (* 3) 10A ETCS(*5) 15A ETCS(*6) 2003 TOYOTA TUNDRA (EWD491U)
Page 56 ( *5 ) * 1 : TOWING PACKAGE * 2 : EXCEPT TOWING PACKAGE * 3 : W/ DAYTIME RUNNING LIGHT * 4 : W/O DAYTIME RUNNING LIGHT * 5 : 2UZ–FE * 6 : 5VZ–FE 2003 TOYOTA TUNDRA (EWD491U)
Page 57 Engine Room Main Wire and Cowl Wire (Left Kick Panel) * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 58 MEMO 2003 TOYOTA TUNDRA (EWD491U)
Page 59 STARTING (5VZ–FE) B–Y B–Y W–R B–W G–B IGNITION SW W–B RELAY (A/T) ( * 2 ) ( M/T ) JUNCTION CONNECTOR SRLY T13 C BATTERY TVIP ECU A , S 2 STARTER 2003 TOYOTA TUNDRA (EWD491U)
Page 60 * 2 : W/O WIRELESS DOOR LOCK CONTROL B–Y B–W GAUGE W–B ( M/T ) , E 4 ENGINE CONTROL MODULE –S CLUTCH START CANSEL SW W–B W–B (A/T) ( M/T ) , J24 JUNCTION CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 61 Wire Harness with Splice Points Cowl Wire * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 62 MEMO 2003 TOYOTA TUNDRA (EWD491U)
Page 63 STARTING (2UZ–FE) B–W IGNITION SW G–Y W–B JUNCTION CONNECTOR JUNCTION CONNECTOR RELAY W–B W–B G–R PARK/NEUTRAL POSITION SW B–L JUNCTION CONNECTOR , S 2 STARTER (* 4) (* 3) BATTERY G–R ( * 3 ) 2003 TOYOTA TUNDRA (EWD491U)
Page 64 * 4 : W/O WIRELESS DOOR LOCK CONTROL STSW , E 6 , E 7 ENGINE CONTROL MODULE STAR W–B W–B SRLY (* 3) (* 3) T13 C TVIP ECU G–R G–R ( * 3 ) ( * 3 ) 2003 TOYOTA TUNDRA (EWD491U)
Page 65 Wire Harness with Splice Points Engine Wire * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 66 MEMO 2003 TOYOTA TUNDRA (EWD491U)
Page 67 IGNITION (2UZ–FE) W–R B–R ENGINE CONTROL MODULE IGNITION SW IGT1 IGT2 IGT3 B–R B–R B–R B–R L–W L–B BATTERY 2003 TOYOTA TUNDRA (EWD491U)
Page 68 * 1 : TOWING PACKAGE * 2 : EXCEPT TOWING PACKAGE ENGINE CONTROL MODULE IGT4 IGT5 IGT6 IGT7 IGT8 IGF2 IGF1 B–R B–R B–R B–R L–W L–W L–W L–B L–B L–B L–B 2003 TOYOTA TUNDRA (EWD491U)
Page 69 40 (2UZ FE) 40 (2UZ–FE) Engine Wire Engine Wire * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 70 MEMO 2003 TOYOTA TUNDRA (EWD491U)
Page 71 IGNITION (5VZ–FE) B–R IGNITION SW B–R B–R IGNITER BATTERY IGT1 IGT2 IGT3 ENGINE CONTROL MODULE 2003 TOYOTA TUNDRA (EWD491U)
Page 72 Wire Harness with Splice Points Engine Wire * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 73 * 2 : W/O DAYTIME RUNNING LIGHT GAUGE * 3 : TOWING PACKAGE * 4 : EXCEPT TOWING PACKAGE 10 1F 5 1E Y–G (* 2) JUNCTION CONNECTOR Y–G Y–G (* 1) (* 1) BATTERY IC REGULATOR A , G 2 GENERATOR 2003 TOYOTA TUNDRA (EWD491U)
Page 74 Engine Room Main Wire and Cowl Wire (Left Kick Panel) * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 75 ENGINE CONTROL (2UZ–FE) B–R W–R FROM POWER SOURCE SYSTEM (SEE PAGE 56) L–R EFI NO. 1 IGNITION SW B–R B–Y ACC CUT RELAY JUNCTION CONNECTOR W–L G–Y 2003 TOYOTA TUNDRA (EWD491U)
Page 76 * 3 : W/ DOOR LOCK CONTROL 7. 5A * 4 : W/O DOOR LOCK CONTROL NO. 2 B–R B–R B–Y B–Y B–W B–W B–L B–W B–W L–W WFSE W–G L–W L–W W–L W–L G–Y G–Y W–B JUNCTION CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 77 B–R B–R B–R B–Y B–W B–W B–L L–W WFSE MREL BATT IGSW A , E 4 , E 5 ENGINE CONTROL MODULE ACCR STSW STAR HT2A OX2A 27 E (* 5) W–G L–W W–L G–Y B–W 2003 TOYOTA TUNDRA (EWD491U)
Page 78 IGT1 IGT2 IGT3 IGT4 A , E 4 , E 5 ENGINE CONTROL MODULE HT1A OX1A HT2B OX2B HT1B OX1B KNK1 KNK2 ( *5 ) (* 5) HTR2 OXR2 HTL2 OXL2 B–W B–W B–W B–W B–W 2003 TOYOTA TUNDRA (EWD491U)
Page 79 IGF1 E 3 A ENGINE CONTROL MODULE G2– NE– ME01 LCK1 34 E 27 C 32 C 23 C ( *5 ) ( *5 ) JUNCTION CONNECTOR CAMSHAFT POSITION CRANKSHAFT POSITION SENSOR SENSOR B–W B–W B–W 2003 TOYOTA TUNDRA (EWD491U)
Page 80 TACH E 3 A ENGINE CONTROL MODULE A/CS ACLD ACMG VTA1 VTA2 M– GE01 17 C G–B G–B A/CS AIND A/CM JUNCTION CONNECTOR INTEGRATION THROTTLE POSITION CONTROL AND PANEL SENSOR W–B B–W B–W B–W B–W B–W 2003 TOYOTA TUNDRA (EWD491U)
Page 81 ENGINE CONTROL (2UZ–FE) L–W L–W G–O G–O V–G VAPOR PRESSURE SENSOR E 5 C ENGINE CONTROL MODULE 32 B JUNCTION CONNECTOR VPA2 VCPA VCP2 EPA2 PTNK V–G G–B G–B G–B ACCEL PEDAL POSITION SENSOR B–W 2003 TOYOTA TUNDRA (EWD491U)
Page 82 FROM POWER SOURCE SYSTEM ( SEE PAGE 56 ) L–W G–O GAUGE JUNCTION CONNECTOR V–G JUNCTION CONNECTOR B–Y 2003 TOYOTA TUNDRA (EWD491U)
Page 83 TERMINAL STA of the engine control module as a control signal. (11) Engine knock signal circuit Engine knocking is detected by the knock sensors, and is input into TERMINALS KNK1, KNK2 of the engine control module as a control signal. 2003 TOYOTA TUNDRA (EWD491U)
Page 84 When a malfunction has occurred in any system, there is a possibility of causing engine trouble due to continued control based on that system. In that case, the fail–safe system either controls the system using the data (Standard values) recorded in the engine control module memory, or else stops the engine. 2003 TOYOTA TUNDRA (EWD491U)
Page 85 31 (2UZ–FE) 31 (2UZ–FE) 36 (Access Cab) 30 (2UZ–FE) 37 (Standard Cab) 36 (Access Cab) 31 (2UZ–FE) 37 (Standard Cab) 31 (2UZ–FE) 31 (2UZ–FE) 30 (2UZ–FE) 31 (2UZ–FE) 36 (Access Cab) 30 (2UZ–FE) 37 (Standard Cab) 2003 TOYOTA TUNDRA (EWD491U)
Page 86 40 (2UZ–FE) Engine Wire Engine Wire Cowl Wire * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 87 FROM POWER SOURCE SYSTEM ( SEE PAGE 56 ) IGNITION SW GAUGE NO. 1 B–W B–Y B–R 3 1I ( A/T ) 6 1F W–B W–B ( A/T ) W–B W–L , J24 JUNCTION CONNECTOR W–B JUNCTION CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 88 BATT MREL IGSW ENGINE CONTROL MODULE EVP1 14 IA4 WFSE NO. 2 DATA LINK CONNECTOR 3 J14 A , J15 JUNCTION CONNECTOR 13 IE1 VSV ( CANISTER CLOSED VALVE ) W–L W–L W–L B–Y W–B W–L 2003 TOYOTA TUNDRA (EWD491U)
Page 89 # 20 # 30 # 50 # 60 F/PS ENGINE CONTROL MODULE VPA2 VTA2 PTNK 25 E G–B VPA2 THROTTLE POSITION SENSOR B–W VAPOR PRESSURE SENSOR W–L , J15 JUNCTION CONNECTOR B–W B–W B–W W–L W–L W–L 2003 TOYOTA TUNDRA (EWD491U)
Page 90 IGNITER AND PANEL CL– M– G–W JUNCTION CONNECTOR 20 A ST1– CL– M– GE01 IGT1 IGT2 IGT3 ENGINE CONTROL MODULE OX2B HT2B KNK1 KNK2 ME01 27 D 29 E 17 D 14 IE1 W–L W–L W–L 2003 TOYOTA TUNDRA (EWD491U)
Page 91 ENGINE CONTROL (5VZ–FE) FROM POWER SOURCE SYSTEM ( SEE PAGE 56 ) GAUGE 8 1F A , C13 COMBINATION METER NE– A , E 4 ENGINE CONTROL MODULE HTAF1 AF1+ AF1– (A/T) (M/T) AF– JUNCTION CONNECTOR W–L 2003 TOYOTA TUNDRA (EWD491U)
Page 92 Whether or not the vehicle is operating in 4WD mode is determined, and a control signal is input to TERMINAL 4WD of the engine control module. (14) Air fuel ratio signal system The air fuel ratio is detected and input as a control signal into TERMINAL AF1+ of the engine control module. 2003 TOYOTA TUNDRA (EWD491U)
Page 93 THW–E1 : 0.2–1.0 volts with idling, engine coolant temp. 60°C (140°F) –120°C (248°F) STA–E1 : 6.0 volts or more with engine cranking W–E1 : 9.0–14.0 volts with idling and malfunction indicator lamp off SP1–E1 : Pulse generation with vehicle moving STP–E1 : 7.5–14.0 volts with brake pedal depressed 2003 TOYOTA TUNDRA (EWD491U)
Page 94 Frame Wire and Cowl Wire (Under the Front Passenger’s Seat) 50 (Standard Cab) * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 95 Right Kick Panel : SPLICE POINTS Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points 42 (5VZ–FE) Engine Wire Engine Wire 42 (5VZ–FE) Sensor Wire Cowl Wire Cowl Wire 2003 TOYOTA TUNDRA (EWD491U)
Page 96 MEMO 2003 TOYOTA TUNDRA (EWD491U)
Page 97 HEADLIGHT (w/ DAYTIME RUNNING LIGHT) H–LP RELAY R–B Y–B R–B G–Y(*6) G–Y(*5) HEADLIGHT HEADLIGHT R–B JUNCTION CONNECTOR W–G COMBINATION R–B TAIL HEAD HIGH FLASH R–W R–W 1J 1J (*1) (* 2) W–B W–B W–B JUNCTION CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 98 * 6 : W/O DOOR LOCK CONTROL ECU IG TAIL Y–B G–Y(*6) G–Y(*5) G–W INTEGRATION RELAY JUNCTION CONNECTOR W–B PARKING PARKING BRAKE SW BRAKE SW (M/T) (A/T) JUNCTION CONNECTOR R–W W–B W–B , J24 JUNCTION CONNECTOR W–B JUNCTION CONNECTOR GENERATOR 2003 TOYOTA TUNDRA (EWD491U)
Page 99 Engine Room Main Wire and Cowl Wire (Left Kick Panel) * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 100 Front Left Fender 42 (5VZ–FE) Left Kick Panel Left Kick Panel Right Kick Panel Right Kick Panel : SPLICE POINTS Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points Cowl Wire 2003 TOYOTA TUNDRA (EWD491U)
Page 101 HIGH FLASH , J24 JUNCTION CONNECTOR * 1 : TOWING PACKAGE * 2 : EXCEPT TOWING PACKAGE W–B * 3 : W/ DOOR LOCK CONTROL * 4 : W/O DOOR LOCK CONTROL JUNCTION JUNCTION CONNECTOR CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 102 Wire Harness with Splice Points Cowl Wire * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 103 * 1 : TOWING PACKAGE * 2 : EXCEPT TOWING PACKAGE * 3 : W/ DOOR LOCK CONTROL * 4 : W/O DOOR LOCK CONTROL TAIL HEAD COMBINATION SW W–B JUNCTION CONNECTOR JUNCTION JUNCTION CONNECTOR CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 104 Wire Harness with Splice Points Cowl Wire * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 105 HEAD G–R HIGH * 1 : TOWING PACKAGE * 2 : EXCEPT TOWING PACKAGE FLASH * 3 : W/ DOOR LOCK CONTROL * 4 : W/O DOOR LOCK CONTROL W–B JUNCTION CONNECTOR JUNCTION JUNCTION CONNECTOR CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 106 Wire Harness with Splice Points Cowl Wire * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 107 L–B(* 1) ( * 3 ) (A/T) (M/T) BACK–UP (M/T) LIGHT RELAY R–B ( A/T ) TO TRAILER SOCKET R–B BACK–UP LIGHT RH BACK–UP LIGHT LH [REAR COMB. LIGHT RH] [REAR COMB. LIGHT LH] W–B W–B 2003 TOYOTA TUNDRA (EWD491U)
Page 108 Frame Wire 48 (Access Cab) Frame Wire * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 109 * 4 : W/O DAYTIME RUNNING LIGHT INTEGRATION RELAY ( *3 ) ( *4 ) , J22 JUNCTION CONNECTOR LIGHT CONTROL SW [COMB. SW] TAIL HEAD JUNCTION CONNECTOR W–B W–B JUNCTION CONNECTOR A , J24 JUNCTION CONNECTOR JUNCTION CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 110 Frame Wire 48 (Access Cab) Frame Wire * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 111 ( IDLE–UP ) G–Y (* 3) (* 4) ( 2UZ–FE ) JUNCTION CONNECTOR A , I25 INTEGRATION CONTROL TAIL AND PANEL RHEOSTAT ILL+ HEAD ILL– IL–1 G–W JUNCTION CONNECTOR W–B (2UZ–FE) (5VZ–FE) W–B W–B JUNCTION CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 112 * 1 : TOWING PACKAGE * 2 : EXCEPT TOWING PACKAGE * 3 : W/ DAYTIME RUNNING LIGHT * 4 : W/O DAYTIME RUNNING LIGHT TO OPTION CONNECTOR JUNCTION CONNECTOR G–W JUNCTION CONNECTOR W–B W–B , J24 JUNCTION CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 113 Wire Harness with Splice Points Cowl Wire Cowl Wire * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 114 MEMO 2003 TOYOTA TUNDRA (EWD491U)
Page 115 FROM POWER SOURCE SYSTEM ( SEE PAGE 56 ) GAUGE DOME L–Y IGNITION KEY CYLINDER LIGHT , J24 JUNCTION CONNECTOR L–Y A , C12 COMBINATION METER (*3) ( *4 ) JUNCTION CONNECTOR ( * 3 ) ( * 4 ) JUNCTION CONNECTOR W–L 2003 TOYOTA TUNDRA (EWD491U)
Page 116 L–Y L–Y DOOR W–B W–B W–B B–W JUNCTION CONNECTOR B–W (*3) JUNCTION CONNECTOR ( * 3 ) JUNCTION CONNECTOR B–W DIODE ( POWER WINDOW W–L (* 2) SYSTEM ) W–B W–B JUNCTION CONNECTOR (*2) (* 2) 2003 TOYOTA TUNDRA (EWD491U)
Page 117 Floor No.1 Wire and Rear Door No.1 Wire RH (Under the Right Quarter Panel) * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 118 Wire Harness with Splice Points Code See Page Wire Harness with Splice Points 48 (Access Cab) 48 (Access Cab) Rear Door No.1 Wire LH Roof Wire Roof Wire 50 (Standard Cab) 48 (Access Cab) Rear Door No.1 Wire RH 2003 TOYOTA TUNDRA (EWD491U)
Page 119 G–B TURN INTEGRATION CONTROL AND PANEL TURN SIGNAL SW [COMB. SW] TURN SIGNAL FLASHER G–R A , C12 C13 C W–B TURN SIGNAL INDICATOR LIGHT [COMB. METER] W–B JUNCTION CONNECTOR W–B W–B , J24 JUNCTION CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 120 Frame Wire Frame Wire 50 (Standard Cab) * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 121 STOP LIGHT FROM POWER SOURCE SYSTEM ( SEE PAGE 56 ) STOP STOP LIGHT JUNCTION CONNECTOR A , J15 JUNCTION CONNECTOR W–B JUNCTION CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 122 Frame Wire 50 (Standard Cab) Frame Wire * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 123 * 2 : EXCEPT TOWING PACKAGE ( * 4 ) * 3 : STANDARD CAB * 4 : ACCESS CAB * 5 : W/ DOOR LOCK CONTROL * 6 : W/O DOOR LOCK CONTROL TAIL HEAD BATTERY JUNCTION JUNCTION CONNECTOR CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 124 Cowl Wire and Driver Side J/B (Lower Finish Panel) * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 125 : GROUND POINTS Code See Page Ground Points Location Left Kick Panel Right Kick Panel : SPLICE POINTS Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points Cowl Wire 2003 TOYOTA TUNDRA (EWD491U)
Page 126 MEMO 2003 TOYOTA TUNDRA (EWD491U)
Page 127 * 2 : EXCEPT TOWING PACKAGE ( * 4 ) * 3 : STANDARD CAB * 4 : ACCESS CAB * 5 : W/ DOOR LOCK CONTROL * 6 : W/O DOOR LOCK CONTROL TAIL HEAD BATTERY JUNCTION JUNCTION CONNECTOR CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 128 Cowl Wire and Driver Side J/B (Lower Finish Panel) * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 129 : GROUND POINTS Code See Page Ground Points Location Left Kick Panel Right Kick Panel : SPLICE POINTS Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points Cowl Wire 2003 TOYOTA TUNDRA (EWD491U)
Page 130 MEMO 2003 TOYOTA TUNDRA (EWD491U)
Page 131 * 3 : W/ DOOR LOCK CONTROL * 4 : W/O DOOR LOCK CONTROL TAIL HEAD LIGHT CONTROL SW [COMB. SW] L(* 1) G ( *1 ) BR ( * 2 ) ( * 1 ) JUNCTION CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 132 ( * 1 ) ( * 2 ) B/UP STTL STTR TRAILER SOCKET TAIL BATT ( * 1 ) ( * 2 ) L(* 1) G ( *1 ) BR ( * 2 ) ( * 1 ) 2003 TOYOTA TUNDRA (EWD491U)
Page 133 Frame Wire and Frame No.3 Wire (Near the License Plate Light) 48 (Access Cab) 50 (Standard Cab) * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 134 Surrounding of the Front of the Fuel Tank 50 (Standard Cab) : SPLICE POINTS Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points 48 (Access Cab) Frame Wire 50 (Standard Cab) Frame Wire 2003 TOYOTA TUNDRA (EWD491U)
Page 135: Cargo Light
STOP LIGHT] JUNCTION CONNECTOR VEHICLE SPEED SENSOR (COMBINATION METER) * 1 : 2UZ–FE * 2 : 5VZ–FE W–B * 3 : W/ DAYTIME RUNNING LIGHT JUNCTION JUNCTION CONNECTOR CONNECTOR * 4 : W/O DAYTIME RUNNING LIGHT 2003 TOYOTA TUNDRA (EWD491U)
Page 136 Left Kick Panel Right Kick Panel Right Kick Panel * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 137 IND1 A , I25 INTEGRATION CONTROL AND PANEL H–L 2–4 AC+2 ( *3 ) 4 IE1 ( *4 ) (* 1) (* 2) IND1 IND2 H–L 2–4 , A 3 4WD CONTROL ECU A/C MAGNETIC CLUTCH 2003 TOYOTA TUNDRA (EWD491U)
Page 138 ACLD ( *1 ) ACMG ( * 1 ) A/CS ACT ( * 2 ) AC1 ( * 2 ) W–G A , E 4 ENGINE CONTROL G–W MODULE RBE+ W–B CENTER AIRBAG SENSOR ASSEMBLY W–B W–B 2003 TOYOTA TUNDRA (EWD491U)
Page 139 ( IDLE–UP ) G–Y (* 1) INTEGRATION RELAY JUNCTION CONNECTOR ( *5 ) ( * 5 ) (*6) (* 6) W–R (* 1) R–B (* 2) TAIL HEAD W–G JUNCTION CONNECTOR G–W G–W W–B W–B W–B JUNCTION CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 140 * 1 : 2UZ–FE * 2 : 5VZ–FE * 5 : W/ DAYTIME RUNNING LIGHT * 6 : W/O DAYTIME RUNNING LIGHT JUNCTION CONNECTOR W–B JUNCTION CONNECTOR G–W , J24 W–B JUNCTION CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 141 22 (*2) 26 (*1) 23 (*2) 27 (*1) * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 142 Intake Manifold Left Left Kick Panel Left Kick Panel Right Kick Panel Right Kick Panel : SPLICE POINTS Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points Cowl Wire Cowl Wire 2003 TOYOTA TUNDRA (EWD491U)
Page 143 B–R B–W B–W BATT STSW STAR THOC A , E 4 , E 5 , E 6 , E 7 ENGINE CONTROL MODULE MREL SLT+ SLT– NCO+ NCO– 13 D 27 D 35 D JUNCTION CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 144 17 C 31 E GE01 M– VTA2 IGSW OILW A , E 4 , E 5 , E 6 , E 7 ENGINE CONTROL MODULE SP2– SP2+ ME01 ODMS ODLP 34 D 16 A L–O W–B 2003 TOYOTA TUNDRA (EWD491U)
Page 145 ELECTRONICALLY CONTROLLED TRANSMISSION AND A/T INDICATOR B–Y L–B L–B A/T INDICATOR SW [PARK/NEUTRAL POSITION SW] 19 IE1 B–Y R–B W–R G–O Y–R G–O Y–R L–O B–Y W–B W–B W–B W–B , J24 JUNCTION CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 146 When the O/D main SW is switched to OFF position, a signal is input to TERMINAL ODMS of the engine control module, and prohibits shift change to the overdrive range through the control of the engine control module. When in the overdrive range already, shift down is made. 2003 TOYOTA TUNDRA (EWD491U)
Page 147 30 (2UZ–FE) 31 (2UZ–FE) 31 (2UZ–FE) 31 (2UZ–FE) 30 (2UZ–FE) 31 (2UZ–FE) 30 (2UZ–FE) 31 (2UZ–FE) 31 (2UZ–FE) 31 (2UZ–FE) : RELAY BLOCKS Code See Page Relay Blocks (Relay Block Location) Engine Room R/B (Engine Compartment Left) 2003 TOYOTA TUNDRA (EWD491U)
Page 148 Wire Harness with Splice Points Cowl Wire Cowl Wire Engine Wire * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 149 B–Y B–R W–B W–B B–W B–W RELAY T13 C TVIP ECU 1 EF1 SRLY 2 EF1 BATT A , E 4 , E 5 , E 6 , E 7 ENGINE CONTROL MODULE MREL SLT+ SLT– 2003 TOYOTA TUNDRA (EWD491U)
Page 150 G–O JUNCTION CONNECTOR VTA2 IGSW A , E 4 , E 5 , E 6 , E 7 ENGINE CONTROL MODULE SP2– SP2+ ME01 ODMS OILW ODLP 22 D , J24 JUNCTION CONNECTOR L–O Y–R W–B 2003 TOYOTA TUNDRA (EWD491U)
Page 151 ELECTRONICALLY CONTROLLED TRANSMISSION AND A/T INDICATOR B–Y B–Y L–B L–B A/T INDICATOR SW [PARK/NEUTRAL POSITION SW] B–Y R–B 21 IE2 W–R G–O G–O L–O B–Y Y–R W–B W–B W–B W–B , J24 JUNCTION CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 152 When the O/D main SW is switched to OFF position, a signal is input to TERMINAL ODMS of the engine control module, and prohibits shift change to the overdrive range through the control of the engine control module. When in the overdrive range already, shift down is made. 2003 TOYOTA TUNDRA (EWD491U)
Page 153 See Page 32 (5VZ–FE) 33 (5VZ–FE) 33 (5VZ–FE) 33 (5VZ–FE) 32 (5VZ–FE) 32 (5VZ–FE) 33 (5VZ–FE) 33 (5VZ–FE) 33 (5VZ–FE) : RELAY BLOCKS Code See Page Relay Blocks (Relay Block Location) Engine Room R/B (Engine Compartment Left) 2003 TOYOTA TUNDRA (EWD491U)
Page 154 Wire Harness with Splice Points Cowl Wire Engine Wire * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 155 FROM POWER SOURCE SYSTEM ( SEE PAGE 56 ) GAUGE ECU IG DATA LINK CONNECTOR 3 JUNCTION CONNECTOR B–R B–Y ABS ACTUATOR WITH ECU FL– FR– W–G JUNCTION CONNECTOR ABS SPEED SENSOR ABS SPEED SENSOR FRONT LH FRONT RH BATTERY 2003 TOYOTA TUNDRA (EWD491U)
Page 156 * 1 : TOWING PACKAGE FROM POWER SOURCE SYSTEM ( SEE PAGE 56 ) * 2 : EXCEPT TOWING PACKAGE STOP ABS ACTUATOR WITH ECU RL– RR– GND1 GND2 JUNCTION CONNECTOR ABS SPEED SENSOR REAR JUNCTION CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 157 Engine Room Main Wire and Driver Side J/B (Lower Finish Panel) 26 (*1) * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 158 48 (Access Cab) Frame Wire and Cowl Wire (Under the Driver’s Seat) Frame Wire and Cowl Wire (Under the Driver’s Seat) 50 (Standard Cab) : GROUND POINTS Code See Page Ground Points Location Right Kick Panel 2003 TOYOTA TUNDRA (EWD491U)
Page 159 STOP LIGHT G–W JUNCTION CONNECTOR MREL BATT IGSW ST1– A , E 4 , E 5 , E 6 , E 7 ENGINE CONTROL MODULE ME01 VTA1 VTA2 M– M– GE01 W–L B JUNCTION CONNECTOR B–W 2003 TOYOTA TUNDRA (EWD491U)
Page 160 A , E 4 , E 6 , E 7 ENGINE CONTROL MODULE VCPA VCP2 EPA2 VPA2 RES/ SET/ COAST VEHICLE SPEED SENSOR ACCEL PEDAL POSITION SENSOR CANSEL (COMBINATION B–Y METER) JUNCTION CONNECTOR CRUISE CONTROL SW [COMB. SW] 2003 TOYOTA TUNDRA (EWD491U)
Page 161 STP–E1 : 7.5–14.0 volts with brake pedal depressed : Below 1.5 volts with brake pedal released C16 CRUISE CONTROL SW [COMB. SW] 5–3 : Approx. 1540Ω with CANCEL SW on Approx. 240Ω with RES/ACC SW on Approx. 630Ω with SET/COAST SW on 2003 TOYOTA TUNDRA (EWD491U)
Page 162 Wire Harness with Splice Points Engine Wire Cowl Wire * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 163 CRUISE CONTROL (5VZ–FE) B–Y B–Y B–Y B–Y IGNITION SW 8 1F RELAY GAUGE BATT MREL , E 4 , E 5 , E 6 , E 7 ENGINE CONTROL MODULE ME01 BATTERY 2003 TOYOTA TUNDRA (EWD491U)
Page 164 ST1– IGSW , E 4 , E 5 , E 6 , E 7 ENGINE CONTROL MODULE VPA2 VTA2 GE01 M– CL– G–B VPA2 VTA2 M– CL– ACCEL PEDAL THROTTLE POSITION THROTTLE CONTROL MOTOR SENSOR SENSOR 2003 TOYOTA TUNDRA (EWD491U)
Page 165 , E 4 , E 5 , E 6 , E 7 ENGINE CONTROL MODULE CRUISE RES/ACC ( A/T ) ( M/T ) SET/COAST CANCEL CRUISE CONTROL SW [COMB. SW] B–Y VEHICLE SPEED SENSOR (COMBINATION METER) 2003 TOYOTA TUNDRA (EWD491U)
Page 166 STP–E1 : 7.5–14.0 volts with brake pedal depressed : Below 1.5 volts with brake pedal released C16 CRUISE CONTROL SW [COMB. SW] 5–3 : Approx. 1540Ω with CANCEL SW on Approx. 240Ω with RES/ACC SW on Approx. 630Ω with SET/COAST SW on 2003 TOYOTA TUNDRA (EWD491U)
Page 167 Wire Harness with Splice Points Engine Wire * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 168 D After work on the SRS is completed, perform the SRS warning light check. D If the vehicle is equipped with a mobile communication system, refer to the precaution in the IN section of the Repair Manual. 2003 TOYOTA TUNDRA (EWD491U)
Page 169 A , P 4 PASSENGER AIRBAG MANUAL ON–OFF SW SQB+ SQB– ECU– ECU+ P– D– RBE+ GND1 A , C 5 , C 6 CENTER AIRBAG SENSOR ASSEMBLY PL– PR– PIND PRETENSIONER LH PRETENSIONER RH W–B JUNCTION CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 170 CENTER AIRBAG SENSOR ASSEMBLY LBE+ SL– SR– JUNCTION CONNECTOR (* 1) ( * 2 ) (* 1) (* 2) CONNECTION CONNECTION DETECTION DETECTION DATA LINK CONNECTOR 3 W–B AIRBAG SENSOR AIRBAG SENSOR (*1, * 2) FRONT LH FRONT RH 2003 TOYOTA TUNDRA (EWD491U)
Page 171 Relay Blocks (Relay Block Location) Engine Room R/B (Engine Compartment Left) * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 172 Left Kick Panel Right Kick Panel Right Kick Panel * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 173 FROM POWER SOURCE SYSTEM ( SEE PAGE 56 ) GAUGE A , C12 , C13 , C14 COMBINATION METER DIODE ( A/T ) BR–Y BR–Y Y–B Y–B VEHICLE SPEED SENSOR ( COMBINATION G–O METER ) LG–B LG–B JUNCTION CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 174 * 2 : W/O DOOR LOCK CONTROL 4WD CONTROL ECU IND2 H–L 2–4 IND1 JUNCTION CONNECTOR BR–Y H–L 2–4 EXI3 IND2 IND1 ENGINE CONTROL ACTUATOR MODULE WITH ECU BR–Y Y–B Y–B G–O LG–B W–B W–B W–B W–B W–B JUNCTION CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 175 4WD (2UZ–FE) 4WD CONTROL ECU ADD ACTUATOR TRANSFER SHIFT ACTUATOR W–B W–B W–B 2003 TOYOTA TUNDRA (EWD491U)
Page 176 ECU TERMINAL 24 to ADD actuator TERMINAL 1 to motor to TERMINAL 5 to 4WD control ECU TERMINAL 11 to GROUND, and the ADD actuator is activated, and the ADD is disconnected. When the ADD is disconnected, the detection SW (ADD position SW) is turned OFF, and the 4LO indicator light turns OFF. 2003 TOYOTA TUNDRA (EWD491U)
Page 177 Engine Wire and Cowl Wire (Right Side of Instrument Panel) * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 178 : GROUND POINTS Code See Page Ground Points Location Right Kick Panel Right Kick Panel : SPLICE POINTS Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points Engine Wire Cowl Wire 2003 TOYOTA TUNDRA (EWD491U)
Page 179 CONNECTOR R–Y TRANSMISSION (A/T) CONTROL RELAY ENGINE CONTROL MODULE L–R (A/T) ( A/T ) ( M/T ) L–R ( M/T ) DETECTION SW (TRANSFER L4 POSITION) ADD ACTUATOR W–B W–B W–B W–B W–B W–B JUNCTION CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 180 * 2 : W/O DOOR LOCK CONTROL GAUGE R–Y (A/T) JUNCTION JUNCTION CONNECTOR CONNECTOR ABS ACTUATOR WITH DIODE ( A/T ) L–R (A/T) L–R ( M/T ) , C12 , C14 COMBINATION METER R–Y ( A/T ) W–B W–B 2003 TOYOTA TUNDRA (EWD491U)
Page 181 Wire Harness with Splice Points Engine Wire Cowl Wire * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 182 MEMO 2003 TOYOTA TUNDRA (EWD491U)
Page 183 DOOR LOCK CONTROL (w/ DAYTIME RUNNING LIGHT) FROM POWER SOURCE SYSTEM ( SEE PAGE 56 ) INTEGRATION RELAY GAUGE DOME 5 1F A , C12 , C13 COMBINATION METER R–Y G–B W–G W–B W–B W–B 2003 TOYOTA TUNDRA (EWD491U)
Page 184 INTEGRATION RELAY 22 1N 9 1N 10 1N L–W R–Y G–B W–G W–B W–B B–Y L–Y B–Y ACT+ ACT– W–B W–B TVIP ECU JUNCTION CONNECTOR W–B 2003 TOYOTA TUNDRA (EWD491U)
Page 185 FROM POWER SOURCE SYSTEM ( SEE PAGE 56 ) POWER INTEGRATION RELAY 6 1H * 1 : ACCESS CAB * 2 : STANDARD CAB B–W JUNCTION JUNCTION CONNECTOR (* 1) CONNECTOR B–W ( * 1 ) 2003 TOYOTA TUNDRA (EWD491U)
Page 186 3–2 : Closed with door lock cylinder unlocked with key D25, D26 DOOR LOCK MOTOR AND DOOR UNLOCK DETECTION SW LH, RH 4–1 : Closed with door lock knob UNLOCK position U1 UNLOCK WARNING SW 1–2 : Closed with key in cylinder 2003 TOYOTA TUNDRA (EWD491U)
Page 187 48 (Access Cab) Rear Door No.1 Wire RH * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 188 MEMO 2003 TOYOTA TUNDRA (EWD491U)
Page 189 DOOR LOCK CONTROL (w/o DAYTIME RUNNING LIGHT) FROM POWER SOURCE SYSTEM ( SEE PAGE 56 ) GAUGE DOME 5 1F A , C12 , C13 COMBINATION METER R–Y JUNCTION CONNECTOR G–B DIODE (LOCK) G–B R–Y JUNCTION CONNECTOR W–G W–G P–B W–B W–B 2003 TOYOTA TUNDRA (EWD491U)
Page 190 INTEGRATION RELAY R–Y G–B R–Y DIODE ( UNLOCK ) W–G B–Y W–B W–B B–Y TVIP ECU B–Y ACT+ W–B W–B JUNCTION CONNECTOR W–B JUNCTION CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 191 FROM POWER SOURCE SYSTEM ( SEE PAGE 56 ) POWER INTEGRATION RELAY 6 1H * 1 : ACCESS CAB * 2 : STANDARD CAB B–W JUNCTION JUNCTION CONNECTOR (* 1) CONNECTOR B–W ( * 1 ) 2003 TOYOTA TUNDRA (EWD491U)
Page 192 3–2 : Closed with door lock cylinder unlocked with key D25, D26 DOOR LOCK MOTOR AND DOOR UNLOCK DETECTION SW LH, RH 4–1 : Closed with door lock knob UNLOCK position U1 UNLOCK WARNING SW 1–2 : Closed with key in cylinder 2003 TOYOTA TUNDRA (EWD491U)
Page 193 48 (Access Cab) Rear Door No.1 Wire RH * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 194 MEMO 2003 TOYOTA TUNDRA (EWD491U)
Page 195 R–B G–Y * 1 : TOWING PACKAGE * 2 : EXCEPT TOWING PACKAGE * 3 : W/ DAYTIME RUNNING LIGHT * 4 : W/O DAYTIME RUNNING LIGHT * 5 : 2UZ–FE * 6 : 5VZ–FE BATTERY 2003 TOYOTA TUNDRA (EWD491U)
Page 196 FROM POWER SOURCE SYSTEM ( SEE PAGE 56 ) ECU–B POWER ECU IG , T12 , T13 TVIP ECU HORN TAIL HEAD B–R G–R R–B G–Y 2003 TOYOTA TUNDRA (EWD491U)
Page 197 , T12 , T13 TVIP ECU MI– R–W ( * 4 ) R–Y (* 3) R–Y JUNCTION CONNECTOR ( * 4 ) W–G SECURITY INDICATOR AND GLASS BREAKAGE SENSOR MICROPHONE W–B , C12 COMBINATION METER W–B W–B 2003 TOYOTA TUNDRA (EWD491U)
Page 198 ACT+ R–W ( * 4 ) R–Y , J22 (* 3) JUNCTION CONNECTOR R–Y R–W JUNCTION CONNECTOR ( * 4 ) ( * 4 ) DIODE (UNLOCK) W–G JUNCTION CONNECTOR W–B W–B B–Y W–B JUNCTION CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 199 TO CLUTCH START SW OR CLUTCH START CANCEL SW (M/T) CUT OFF , T12 , T13 TVIP ECU SRLY DSWD DMLP B–W B–W B–W JUNCTION JUNCTION DIODE ( POWER WINDOW CONNECTOR (*8) CONNECTOR SYSTEM ) B–W ( * 8 ) B–L 2003 TOYOTA TUNDRA (EWD491U)
Page 200 FROM POWER SOURCE SYSTEM ( SEE PAGE 56 ) * 7 : STANDARD CAB * 8 : ACCESS CAB DOME L–Y L–Y B–W L–Y , J22 JUNCTION CONNECTOR B–W DIODE JUNCTION (TVIP) CONNECTOR B–L B–W JUNCTION CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 201 Cowl Wire and Driver Side J/B (Lower Finish Panel) 27 (*1) 27 (*1) * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 202 Front Door RH Wire 50 (Standard Cab) 50 (Standard Cab) 48 (Access Cab) 48 (Access Cab) Rear Door No.1 Wire LH Roof Wire Roof Wire 50 (Standard Cab) 48 (Access Cab) Rear Door No.1 Wire RH 2003 TOYOTA TUNDRA (EWD491U)
Page 203 ECU IG POWER INTEGRATION POWER RELAY RELAY L–R L–R L–R ( *3 ) , J22 JUNCTION CONNECTOR 4 BE2 POWER WINDOW SW (BACK WINDOW) 5 BG2 B–W ( * 2 ) POWER WINDOW MOTOR (BACK WINDOW) 2003 TOYOTA TUNDRA (EWD491U)
Page 204 * 3 : 5VZ–FE W/O DAYTIME RUNNING LIGHT M/T * 4 : EXCEPT * 3 L–R L–R L–R POWER WINDOW MASTER SW DOWN POWER WINDOW MOTOR FRONT LH , J24 JUNCTION CONNECTOR POWER WINDOW MOTOR FRONT RH 2003 TOYOTA TUNDRA (EWD491U)
Page 205 SW to off, a signal is input to TERMINAL 3, 14 or 15 of the integration relay. As a result, the integration relay turns off, and up and down movement of the window stops. 2003 TOYOTA TUNDRA (EWD491U)
Page 206 Floor No.1 Wire and Rear Door No.1 Wire RH (Under the Right Quarter Panel) * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 207 Inside of Rear Door RH : SPLICE POINTS Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points 48 (Access Cab) Rear Door No.1 Wire LH 48 (Access Cab) Rear Door No.1 Wire RH 2003 TOYOTA TUNDRA (EWD491U)
Page 208 MEMO 2003 TOYOTA TUNDRA (EWD491U)
Page 209 * 7 : W/O DOOR LOCK CONTROL DOME GAUGE A , C12 COMBINATION METER (* 1) ( *3 ) ( *4 ) , J24 JUNCTION CONNECTOR (*3) ( *4 ) ( * 1 ) W–B (* 3, *4) 2003 TOYOTA TUNDRA (EWD491U)
Page 210 Cowl Wire and Driver Side J/B (Lower Finish Panel) 26 (*1) * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 211 Floor No.2 Wire and Rear Door No.1 Wire LH (Under the Left Quarter Panel) 48 (Access Cab) 50 (Standard Cab) Cowl Wire and Seat No.1 Wire (Under the Driver’s Seat) : GROUND POINTS Code See Page Ground Points Location Left Kick Panel Right Kick Panel 2003 TOYOTA TUNDRA (EWD491U)
Page 212 MEMO 2003 TOYOTA TUNDRA (EWD491U)
Page 213: Cigarette Lighter And Power Outlet
* 4 : EXCEPT TOWING PACKAGE B–L (*3) (* 4) OUTLET1 OUTLET2 ( * 1 ) ( * 2 ) POWER POWER OUTLET OUTLET CIGARETTE LIGHTER ( * 1 ) ( * 2 ) W–B JUNCTION CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 214 Wire Harness with Splice Points Cowl Wire * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 215 CLOCK FROM POWER SOURCE SYSTEM ( SEE PAGE 56 ) TAIL DOME INTEGRATION RELAY , J24 JUNCTION JUNCTION CONNECTOR CONNECTOR I24 A , I25 INTEGRATION CONTROL AND PANEL ILL+ JUNCTION CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 216 See Page Ground Points Location Right Kick Panel * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 217 * 3 : 5VZ–FE W/O DOOR LOCK CONTROL W/O DAYTIME RUNNING LIGHT * 4 : 5VZ–FE W/ DOOR LOCK CONTROL W/ DAYTIME RUNNING LIGHT, 2UZ–FE W/ DAYTIME RUNNING LIGHT * 5 : 5VZ–FE W/ DOOR LOCK CONTROL W/O DAYTIME RUNNING LIGHT, 2UZ–FE W/O DAYTIME RUNNING LIGHT 2003 TOYOTA TUNDRA (EWD491U)
Page 218 Cowl Wire and Driver Side J/B (Lower Finish Panel) 27 (*1) * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 219 WIPER AND WASHER (w/ INT TIME SW MECHANISM) POWER SOURCE SYSTEM ( SEE PAGE 56 ) WIPER AND WASHER SW[COMB. SW] GAUGE HIGH WASHER L–R WIPER MOTOR JUNCTION JUNCTION CONNECTOR CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 220 Engine Room Main Wire and Cowl Wire (Left Kick Panel) * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 221 WIPER AND WASHER (w/ INT TIME SW MECHANISM) : GROUND POINTS Code See Page Ground Points Location 40 (2UZ–FE) Front Left Fender Front Left Fender 42 (5VZ–FE) Left Kick Panel Right Kick Panel 2003 TOYOTA TUNDRA (EWD491U)
Page 222 MEMO 2003 TOYOTA TUNDRA (EWD491U)
Page 223 WIPER AND WASHER (w/o INT TIME SW MECHANISM) POWER SOURCE SYSTEM ( SEE PAGE 56 ) WIPER AND WASHER SW[COMB. SW] GAUGE MIST HIGH WASHER L–R W–B WIPER MOTOR JUNCTION JUNCTION CONNECTOR CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 224 42 (5VZ–FE) Left Kick Panel Right Kick Panel * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 225 MIRROR HEATER FROM POWER SOURCE SYSTEM ( SEE PAGE 56 ) GAUGE MIR HTR JUNCTION CONNECTOR B–Y MIRROR HEATER SW MIR HTR RELAY P–G , J24 JUNCTION CONNECTOR JUNCTION CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 226 Ground Points Location Left Kick Panel Right Kick Panel * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 227 ( A/T ) REMOTE CONTROL MIRROR SW L–B P–G Y–B , J24 ( * 1 ) ( * 1 ) JUNCTION ( * 2 ) ( * 2 ) CONNECTOR REMOTE CONTROL MIRROR LH REMOTE CONTROL MIRROR RH 2003 TOYOTA TUNDRA (EWD491U)
Page 228 50 (Standard Cab) Front Door LH Wire * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 229: Power Seat
( DRIVER’ S SEAT ( DRIVER’ S SEAT FRONT ( DRIVER’ S SEAT REAR ( DRIVER’ S SEAT SLIDE CONTROL ) VERTICAL CONTROL ) VERTICAL CONTROL ) RECLINING CONTROL ) W–B W–B , J24 JUNCTION CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 230 Wire Harness with Splice Points Cowl Wire * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 231 2 IF1 3 IF1 ( * 2 ) 2 BE2 3 BE2 2 BF2 3 BF2 1 BA1 2 BA1 TWEETER RH TWEETER LH FRONT DOOR SPEAKER FRONT DOOR SPEAKER REAR DOOR SPEAKER REAR DOOR SPEAKER 2003 TOYOTA TUNDRA (EWD491U)
Page 232 Speaker Tweeter Wire RH 50 (Standard Cab) 50 (Standard Cab) * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 233 ( * 2 ) JUNCTION CONNECTOR A , C12 , C14 COMBINATION METER SPEEDOMETER TACHOMETER ( * 1 ) ( * 3 ) ( * 2 ) ( * 4 ) TACH VEHICLE SPEED SENSOR B–Y (COMBINATION METER) 2003 TOYOTA TUNDRA (EWD491U)
Page 234 * 8 : W/O DAYTIME RUNNING LIGHT A , C12 , C13 COMBINATION METER ( * 1 ) ( * 1 ) (* 2) IE1 (* 2) (* 1) FUEL SENDER ( * 2 ) OIL PRESSURE JUNCTION CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 235 G–W (*5) R–W (* 8 M/T) W–B R–W ( * 5 A/T ) R–W ( * 5 M/T ) PARKING PARKING BRAKE BRAKE SW ( A/T ) SW ( M/T ) W–B JUNCTION JUNCTION CONNECTOR CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 236 * 5 : W/ DAYTIME RUNNING LIGHT * 8 : W/O DAYTIME RUNNING LIGHT 10 1F FROM A/T INDICATOR SW [PARK/NEUTRAL POSITION SW] (*2) A , C12 , C13 , C14 COMBINATION METER W–B , J24 JUNCTION CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 237 Frame Wire and Cowl Wire (Under the Driver’s Seat) 50 (Standard Cab) * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 238 42 (5VZ–FE) Left Kick Panel Left Kick Panel Right Kick Panel Right Kick Panel : SPLICE POINTS Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points Cowl Wire Cowl Wire 2003 TOYOTA TUNDRA (EWD491U)
Page 239 ( * 2 ) ( * 2 ) ACID(*1) A/CS ACMG(* 1) ACT(* 2) AC1(* 2) LCK1 A , E 4 C , E 7 ENGINE CONTROL MODULE A/C MAGNETIC CLUTCH A/C MAGNETIC CLUTCH AND LOCK SENSOR 2003 TOYOTA TUNDRA (EWD491U)
Page 240 * 2 : 5VZ–FE * 3 : 5VZ–FE A/T * 4 : 5VZ–FE M/T BLOWER RELAY MOTOR L–R AC+2 BLOWER RESISTOR A , I25 INTEGRATION CONTROL AND PANEL L–B W–B Y–R W–B BLOWER SW W–B W–B W–B JUNCTION CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 241 TERMINAL (A) 8 to A/C magnetic clutch. Causing The compressor to operate. When blower SW is on and mode SW (Integration control and panel) is at DEF or F/DEF position, it causes A/C to run whether A/C SW (Integration control and panel) is on or not. 2003 TOYOTA TUNDRA (EWD491U)
Page 242 Engine Room Main Wire Cowl Wire Cowl Wire 42 (5VZ–FE) * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 243 IGNITER AND (E03) CONTROL IGNITION COIL NO. 7 MODULE W–B IGNITER AND ( ME01 ) IGNITION COIL NO. 8 W–B NOISE FILTER (E01) DATA LINK ( SG ) CONNECTOR 3 ( 2UZ–FE ) ( 2UZ–FE ) 2003 TOYOTA TUNDRA (EWD491U)
Page 244 (5VZ–FE) * 1 : W/ DAYTIME RUNNING LIGHT RADIO AND PLAYER * 2 : W/O DAYTIME RUNNING LIGHT * 3 : W/ CIGARETTE LIGHTER ILLUMINATION * 4 : W/O CIGARETTE LIGHTER ILLUMINATION * 5 : 2UZ–FE 2003 TOYOTA TUNDRA (EWD491U)
Page 245 COMBINATION (BRL) TVIP ECU METER W–B W–B SHORT CONNECTOR MIRROR HEATER SW ( TVIP ) W–B W–B W–B TOWING CONVERTER TVIP BUZZER SECURITY INDICATOR W–B W–B AND GLASS BREAKAGE SENSOR MICROPHONE , J24 JUNCTION W–B CONNECTOR 2003 TOYOTA TUNDRA (EWD491U)
Page 246 SEAT BELT WARNING W–B ( * 9 ) OCCUPANT DETECTION SENSOR AND BUCKLE SW RH W–B W–B BUCKLE SW LH ( * 8 ) ( *8 ) W–B W–B CENTER AIRBAG ( E2 ) W–B SENSOR ASSEMBLY 2003 TOYOTA TUNDRA (EWD491U)
Page 247 Frame Wire and Frame No.3 Wire (Near the License Plate Light) 50 (Standard Cab) * 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat) 2003 TOYOTA TUNDRA (EWD491U)
Page 248 Front Door RH Wire Front Door RH Wire Cowl Wire 50 (Standard Cab) 48 (Access Cab) 48 (Access Cab) Frame Wire Frame Wire 50 (Standard Cab) Front Door LH Wire 50 (Standard Cab) 48 (Access Cab) 2003 TOYOTA TUNDRA (EWD491U)
Page 249 J POWER SOURCE (Current Flow Chart) 2003 TOYOTA TUNDRA (EWD491U)
Page 250 2003 TOYOTA TUNDRA (EWD491U)
Page 251 Electronically Controlled Transmission and A/T Indicator (2UZ–FE) Electronically Controlled Transmission and A/T Indicator (5VZ–FE) Engine Control (2UZ–FE) Engine Control (5VZ–FE) ∗ These are the page numbers of the first page on which the related system is shown. 2003 TOYOTA TUNDRA (EWD491U)
Page 252 Integration Control and Panel Light Auto Turn Off (w/ Daytime Running Light) Light Auto Turn Off (w/o Daytime Running Light) Taillight ∗ These are the page numbers of the first page on which the related system is shown. 2003 TOYOTA TUNDRA (EWD491U)
Page 253 HEAD RH Headlight (w/ Daytime Running Light) Headlight (w/o Daytime Running Light) HEAD RL Headlight (w/ Daytime Running Light) ∗ These are the page numbers of the first page on which the related system is shown. 2003 TOYOTA TUNDRA (EWD491U)
Page 254 (Except Towing Illumination Package) Starting (5VZ–FE) Taillight Charging Cigarette Lighter and Power Outlet 140A ALT (Towing Package) Illumination Taillight ∗ These are the page numbers of the first page on which the related system is shown. 2003 TOYOTA TUNDRA (EWD491U)
Page 255 Yellow 1 2 3 4 5 6 Black Yellow Yellow Black Gray 1 2 3 4 Black Gray Gray Gray 1 2 3 4 5 6 Black (Bench Seat) (*1) (w/ Power Seat) 6 7 8 2003 TOYOTA TUNDRA (EWD491U)
Page 256 9 10 1112131415 16 17 Black Black Gray Gray (2UZ–FE) Gray 1 2 3 4 5 6 7 8 9 4 5 6 10 11 12 131415 16 17 18 (5VZ–FE) Blue (2UZ–FE) Gray (5VZ–FE) Blue Gray 2003 TOYOTA TUNDRA (EWD491U)
Page 257 16 17 20 21 (2UZ–FE) (5VZ–FE) (2UZ–FE) 3 4 5 6 9 10 13 14 15 13 14 15 16 12 13 14 15 16 17 21 22 23 24 22 23 24 25 25 26 2003 TOYOTA TUNDRA (EWD491U)
Page 258 1 2 3 4 5 6 7 8 9 10 11 12 13 1 2 3 1 2 3 14 15 1617181920212223 24 25 26 Dark Gray (2UZ–FE) (5VZ–FE) Black Brown Brown Dark Gray Dark Gray Dark Gray Dark Gray Black Black Dark Gray Black 2003 TOYOTA TUNDRA (EWD491U)
Page 259 7 8 9 101112 A B B 1 2 3 4 5 6 7 8 9 A A B D D D C C 10111213 141516 1718192021 Blue A B B A A B D D D C C 2003 TOYOTA TUNDRA (EWD491U)
Page 260 B B B C C C B B B C C C (2UZ–FE) Dark Gray (5VZ–FE) Black Gray Gray Black 1 2 3 4 Black Gray Black Gray 3 2 1 3 4 5 6 Gray Gray Black Yellow 2003 TOYOTA TUNDRA (EWD491U)
Page 261 1 2 3 4 5 6 (*3) (2UZ–FE) 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 2003 TOYOTA TUNDRA (EWD491U)
Page 262 4 5 6 7 8 9 Gray Black 4 5 6 7 8 1 2 3 4 5 6 7 8 9 10 11 1 2 3 4 5 6 12 13 1415161718192021 22 7 8 9 10 11 12 2003 TOYOTA TUNDRA (EWD491U)
Page 263 K CONNECTOR LIST Black Black Black Black Blue 1 2 3 1 2 3 Blue Blue Dark Gray (2UZ–FE) Gray (5VZ–FE) Gray Black 1 2 3 2003 TOYOTA TUNDRA (EWD491U)
Page 264 MEMO 2003 TOYOTA TUNDRA (EWD491U)
Page 265 90980–11113 Engine Control Module (2UZ–FE) 90980–12143 Combination Meter 90980–11115 Engine Control Module (5VZ–FE) 90980–11586 Combination Meter 90980–11116 Combination SW 90980–11672 Note: Not all of the above part numbers of the connector are established for the supply. 2003 TOYOTA TUNDRA (EWD491U)
Page 266 Injector No.1 Option Connector 90980–11603 Injector No.2 Oil Pressure Sender 90980–11363 Injector No.3 90980–11153 90980–11153 Park/Neutral Position SW 90980–11784 Injector No.4 Power Steering Oil Pressure SW 90980–11428 Injector No.5 Passenger Airbag Manual On–Off SW 90980–12017 Injector No.6 2003 TOYOTA TUNDRA (EWD491U)
Page 267 Step Light 81945–33010 Stop Light SW 90980–11118 Seat Belt Warning Occupant Detection 90980–11296 Sensor Short Pin 90980–10907 Short Connector (TVIP) 90980–10908 Note: Not all of the above part numbers of the connector are established for the supply. 2003 TOYOTA TUNDRA (EWD491U)
Page 268 Code Part Name Part Number Code Part Name Part Number 2003 TOYOTA TUNDRA (EWD491U)
Page 269 1 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM S ta rtin g ( 5V Z – F E ) P ow e r S o urc e C ha rg in g B–R B–Y * 1 : Towing Package B–Y * 2 : Except Towing Package...
Page 270 To Engine Control Module(STAR)<5–10> PARK/NEUTRAL POSITION SW B–W (*4) W–B W–B W–B W–B W–B G–R (*4) G–Y G–R From TVIP ECU <23–3> (*3) ST RELAY B–W 30A ST3 G–Y 30A AM2 B–L(*1) W–R W–R B (*2) 2003 TOYOTA TUNDRA (EWD491U)
Page 271 3 TOYOTA TUNDRA Ign ition ( 2 U Z – F E ) P ow er S ou rc e * 1 : Towing Package B–R * 2 : Except Towing Package IGNITION SW From Engine Control Module <5–13><5–14> 21 IE1 B–R...
Page 272 M OVERALL ELECTRICAL WIRING DIAGRAM B–Y To Combination Meter <29–3> B–R IGNITION COIL NO. 3 B–R W–G R–L IGNITION COIL NO. 2 B–R B–L IGNITION COIL NO. 1 B–R B–R B–R W–B W–B NOISE FILTER B–R W–R 2003 TOYOTA TUNDRA (EWD491U)
Page 273 MEMO 2003 TOYOTA TUNDRA (EWD491U)
Page 274 W–L 15A EFI NO. 1 B–R 50A J/B W–G 30A AM2 W–R 140A ALT ( *1 ) 100A ALT ( *2 ) 40A AM1 SHORT PIN W–R 10A ETCS B–L ( *1 ) B (*2) W–G 2003 TOYOTA TUNDRA (EWD491U)
Page 275 5 TOYOTA TUNDRA ( Cont’ d ) ( Cont. next page ) E n gine C on tro l ( 2 U Z – F E ) * 5 : Shielded G–Y B–O W–G B–R B–Y B–Y B–R B–R B–W B–W...
Page 276 Position SW<2–3> HEATED OXYGEN SENSOR ( Bank 1 (*5) Sensor 2) B–W L–Y R–Y To Integration Control and Panel<30–3> L–B HEATED OXYGEN SENSOR(Bank 2 G–Y Sensor 2) From Diode ( Idle–Up ) <9–4> B–W VSV(EVAP) W–G Y–B 2003 TOYOTA TUNDRA (EWD491U)
Page 277 5 TOYOTA TUNDRA ( Cont’ d ) C ru is e C o n trol E n gine C on tro l ( 2 U Z – F E ) ( 2 U Z – F E ) B–O B–W B–W...
Page 278 EFI RELAY B–R JUNCTION CONNECTOR B–Y W–B W–B W–B B–W B–O ( *1 ) B–O(*2) B–R B–R B–R 30A AM2 W–R 40A AM1 100A ALT B–R 50A J/B 15A EFI NO. 1 W–G W–G W–G 15A ETCS 2003 TOYOTA TUNDRA (EWD491U)
Page 279 6 TOYOTA TUNDRA ( Cont. next page ) E n gine C on trol ( 5 V Z – F E ) * 1 : w/ Cruise Control * 2 : w/o Cruise Control W–G B–Y B–R W–L W–L W–L B–Y...
Page 280 <29–3> W–B B–Y From Igniter <4–2><4–3> R–L ( Shielded ) B–L ( Shielded ) R–B From Center Airbag Sensor Assembly<17–3> From ” STA” Fuse <1–1> To Park/Neutral Position SW<1–2> (A/T) G–W From Stop Light SW <13–4> 2003 TOYOTA TUNDRA (EWD491U)
Page 281 7 TOYOTA TUNDRA * 1 : Towing Package * 2 : Except Towing Package H e ad ligh t ( w / D a y tim e R u n ning L ig h t ) P o w e r S o urc e...
Page 282 R–Y R–L R–Y R–Y R–Y G–Y (*4) W–B INTEGRATION RELAY LIGHT DIMMER SW CONTROL G–Y ( *3 ) To TVIP ECU <23–3> 140A ALT ( *1 ) BATTERY 100A ALT(*2) B–L(*1) B–L(*1) B (*2) B (*2) 2003 TOYOTA TUNDRA (EWD491U)
Page 283 9 TOYOTA TUNDRA * 1 : Towing Package * 2 : Except Towing Package P o w e r S o urc e T a illig ht Illum in a tio n * 3 : w/ Daytime Running Light * 4 : w/o Daytime Running Light G–Y...
Page 284 REAR LH LOWER COMBINATION B–W B–W W–B METER (*2) (*2) (*2) From Integration Relay<20–2><21–2> DOOR COURTESY SW REAR LH UPPER 140A ALT ( *5 ) 40A AM1 100A ALT(*6) 10A DOME SHORT PIN B–L(*5) L–Y B (*6) 2003 TOYOTA TUNDRA (EWD491U)
Page 285 11 TOYOTA TUNDRA P ow e r S ou rc e T urn S ign al an d H az ar d W a rning L igh t * 1 : Towing Package * 2 : Except Towing Package B–Y...
Page 286 Relay<7–3> DIMMER RELAY See Headlight System<7–3> See Headlight System<7–1> H–LP RELAY 20A FOG L–R 140A ALT(*6) 40A AM1 100A ALT(*7) B–L ( *6 ) B (*7) 5A ECU–B SHORT PIN W–R ( *3 ) W–R W–R(*4) 2003 TOYOTA TUNDRA (EWD491U)
Page 287 13 TOYOTA TUNDRA P ow er S ou rc e M irro r H ea ter S top L igh t G–Y See Cruise Control System<5–15><6–11> 2 1F * 1 : Towing Package * 2 : Except Towing Package STOP LIGHT B–Y...
Page 288 W–L B–R B–R W–L B–Y W–B W–B JUNCTION CONNECTOR 30A AM2 W–R 140A ALT ( *1 ) 40A AM1 100A ALT(*2) 15A EFI NO. 1 B–L(*1) B–R B ( *2 ) 5A ECU–B SHORT PIN W–R 2003 TOYOTA TUNDRA (EWD491U)
Page 289 14 TOYOTA TUNDRA ( Cont’ d ) E le ctr on ic ally C o n trolle d T ra ns m is s io n a nd A /T In d ic ato r ( 2 U Z – F E ) W–R...
Page 290 NO. 1 R–Y B–O G–W (*2) JUNCTION CONNECTOR B–O B–O B–R (*1) (*1) B–Y B–R W–L W–L W–L B–R B–R W–L B–Y W–B W–B 30A AM2 W–R 40A AM1 100A ALT 15A EFI NO. 1 B–R 2003 TOYOTA TUNDRA (EWD491U)
Page 291 15 TOYOTA TUNDRA ( Cont’ d ) E le ctro n ic ally C o ntr olle d T ra ns m is s io n an d A /T In dic ato r ( 5 V Z – F E ) L–R...
Page 292 Data Link Connector 3 <5–4><6–4> To Detection SW L–R (Transfer L4 Position) <18–4><19–3> ABS WARNING LIGHT [COMB. METER] B–Y B–L B–R B–Y 30A ABS3 B–Y 40A ABS2 B–R 140A ALT(*1) BATTERY 40A AM1 100A ALT(*2) B–L(*1) B (*2) 2003 TOYOTA TUNDRA (EWD491U)
Page 293 17 TOYOTA TUNDRA P o w e r S o urc e S R S * 1 : Towing Package * 2 : Except Towing Package B–R W–R B–R AIRBAG SQUIB (Front Passenger AIRBAG SQUIB Airbag Assembly) (Steering Wheel Pad)
Page 294 W–R ( *2 ) ( *2 ) W–R (*1) L–O L–O L–B L–B (*1) (*1) JUNCTION CONNECTOR B–Y B–Y B–Y JUNCTION CONNECTOR B–L(*3) B ( *4 ) JUNCTION CONNECTOR W–R W–R W–R (*1) (*1) W–R (*2) 2003 TOYOTA TUNDRA (EWD491U)
Page 295 18 TOYOTA TUNDRA ( Cont’ d ) 4 W D ( 2 U Z – F E ) W–B TRANSFER SHIFT ACTUATOR 14 IE1 4WD CONTROL ECU 17 IE2 9 IE2 16 IE2 8 IE2 2 EC1 4 EC1 3 EC1...
Page 296 ( A/T ) ( A/T ) ( A/T ) JUNCTION CONNECTOR From Engine Control Module<6–10> (M/T) (M/T) (A/T) (A/T) ( A/T ) (M/T) TRANSMISSION CONTROL RELAY R–B R–B R–B R–W R–W R–W B–R B–R W–B W–B 2003 TOYOTA TUNDRA (EWD491U)
Page 297 20 TOYOTA TUNDRA L igh t A u to T urn O ff ( w / D ay tim e R un ning D o or Lo c k C on trol ( w / D a ytim e R u nn in g L ig ht )
Page 298 DOOR KEY LOCK AND CONNECTOR UNLOCK SW LH L–R L–R L–R UNLOCK W–B W–B W–G W–G LOCK W–G W–G JUNCTION From TVIP ECU CONNECTOR <23–4> L–R L–R B–L(*1) B (*2) 40A AM1 140A ALT(*1) 100A ALT(*2) W–G 50A J/B 2003 TOYOTA TUNDRA (EWD491U)
Page 299 22 TOYOTA TUNDRA * 1 : 5VZ–FE w/o Daytime Running Light M/T * 2 : Except *1 P o w e r S o urc e P o w e r W in d ow * 3 : Towing Package * 4 : Except Towing Package L–R...
Page 300 SECURITY INDICATOR JUNCTION AND GLASS BREAKAGE CONNECTOR SENSOR MICROPHONE W–B W–B TVIP BUZZER W–B W–B B–R LG–B W–B (*7) (*7) SHORT CONNECTOR (TVIP) W–B 40A AM1 50A J/B W–G 5A ECU–B SHORT PIN B–L(*1) W–R B (*2) 2003 TOYOTA TUNDRA (EWD491U)
Page 301 24 TOYOTA TUNDRA P o w er S o u rce P ow er O utle t C ig a rette L igh ter C lo c k L–R (*5) L–Y L–R ( *6 ) W–R (*8) JUNCTION CONNECTOR 9 IA4...
Page 302 M OVERALL ELECTRICAL WIRING DIAGRAM POWER SEAT MOTOR W–B ( Driver’ s Seat Lumbar Support Control) W–B W–B W–B REAR L–R FRONT W–G L–W L–W DOWN Y–R Y–G DOWN W–G W–R REAR B–R FRONT W–B B–L(*1) W–G W–G B (*2) 2003 TOYOTA TUNDRA (EWD491U)
Page 303 26 TOYOTA TUNDRA P o w e r S o urc e W ip er an d W as h er K ey R e min de r a nd S e at B e lt W a rning L–Y...
Page 304 ACC CUT RELAY Y–B L–B JUNCTION CONNECTOR P–B R 8 A , B REMOTE CONTROL MIRROR LH 5A ECU–B SHORT PIN W–R (*10) 140A ALT(*8) 40A AM1 100A ALT(*9) B–L(*8) B ( *9 ) 50A J/B W–G 2003 TOYOTA TUNDRA (EWD491U)
Page 305 28 TOYOTA TUNDRA P ow er S ou rc e R ad io a nd P la y er L–R (*7) L–R L–R * 1 : w/ Door Lock Control * 5 : Except Towing Package (*6) (* 6) * 2 : w/o Door Lock Control * 6 : 2UZ–FE...
Page 306 (*1) P–L P–L (*2) (*2) G–B G–B (*2) (*2) B–Y R–L R–L (*1) (*1) B–Y B–Y 140A ALT(*5) 40A AM1 100A ALT ( *6 ) 10A DOME SHORT PIN B–L ( *5 ) B (*6) L–Y 2003 TOYOTA TUNDRA (EWD491U)
Page 307 29 TOYOTA TUNDRA ( Cont’ d ) C o m bina tio n M ete r * 1 : 2UZ–FE * 2 : 5VZ–FE * 9 : w/ Daytime Running Light *10 : w/o Daytime Running Light See Electronically Controlled Transmission and A/T indicator System<14–6><15–6>...
Page 308 L–B L–Y L–R W–B L–R 10A GAUGE B–Y B–Y Y–R L–R W–B W–B 50A HTR 140A ALT(*5) 100A ALT(*6) 40A AM1 B–L(*5) B (*6) 5A ECU–B W–R (*1) 10A DOME SHORT PIN L–Y 50A J/B W–G 2003 TOYOTA TUNDRA (EWD491U)
Page 309 30 TOYOTA TUNDRA ( Cont’ d ) A ir C o n ditio ning In teg ration C on tro l a nd P a ne l C arg o L ig ht W–R(*1) W–R (*1) * 1 : 2UZ–FE W–G...
Page 310 ( *1 ) ( *1 ) ( *1 ) ( *1 ) 40A AM1 ( *1 ) 30A SUB BATT L–W (*1) 30A TOW TAIL B–W 30A TOW BRK B–R (*1) 30A TOWING B–L(*1) B–Y B (*2) 2003 TOYOTA TUNDRA (EWD491U)
Page 311 M OVERALL ELECTRICAL WIRING DIAGRAM 2003 TOYOTA TUNDRA (EWD491U)
Page 312 [A] : System Title [F] : Junction Block (The number in the circle is the J/B No. and the connector code is shown beside [B] : Indicates the wiring color. it). Junction Blocks are shaded to clearly Wire colors are indicated by an alphabetical code. separate them from other parts.
Page 313 SYSTEM INDEX SYSTEMS LOCATION SYSTEMS LOCATION ........... . . 16–2 Integration Control and Panel .

Toyota Tundra 2003 Electrical Wiring Diagram

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Summary of Contents for Toyota Tundra 2003

Page 19: Engine Compartment

Page 135: Cargo Light

Page 213: Cigarette Lighter And Power Outlet

Page 229: Power Seat

Table of Contents