Toyota 2006 PRIUS Manual
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Toyota 2006 PRIUS Manual

Nhw20 series
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See also: Owner's Manual , Operating Manual
To assist you in your service activities, this manual explains the main characteristics of the 2006 PRIUS, in
particular providing a technical explanation of the construction and operation of new mechanisms and new
technology used.
This manual is divided into 3 sections.
1. Introduction - Changed features and model line-up are explained.
2. New Features - Technical explanation of the construction and operation of each new system and
component.
3. Appendix - Major technical specifications of the vehicle.
CAUTION, NOTICE, REFERENCE and NOTE are used in the following ways:
CAUTION
NOTICE
REFERENCE
NOTE
For detailed service specifications and repair procedures, refer to the following Repair Manuals:
" 2006 PRIUS Repair Manual
" 2006 PRIUS Electrical Wiring Diagram
All information contained herein is the most up-to-date at the time of publication. We reserve the right to make
changes without prior notice.
2005
TOYOTA MOTOR CORPORATION
All rights reserved. This book may not be repro-
duced or copied., in whole or in part, without the
written permission of Toyota Motor Corporation.
First Printing: Nov. 7, 2005 01-051107-00
FOREWORD
Applicable models: NHW20 series
A potentially hazardous situation which could result in injury if instructions are
ignored.
Damage to the vehicle or components may occur if instructions are ignored.
Explains the theory behind mechanisms and techniques.
Notes or comments not included under the above 3 titles.
Manual Name
Pub. No.
RM01R0U
EM01R0U

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  • Page 1 FOREWORD To assist you in your service activities, this manual explains the main characteristics of the 2006 PRIUS, in particular providing a technical explanation of the construction and operation of new mechanisms and new technology used. Applicable models: NHW20 series This manual is divided into 3 sections.
  • Page 2 INTRODUCTION - OUTLINE OF NEW FEATURES INTRODUCTION OUTLINE OF NEW FEATURES 1. Exterior " The design of the headlights and the radiator grille has been changed. " A new front spoiler has been provided as standard equipment. " The design of the rear combination lights has been changed. "...

  • Page 3: Rear Seat

    " The hip point has been lowered 6 mm (0.2 in.) to provide ample head clearance and enhance ergonomics. 340 mm (13.4 in.) 01RMO02Y 4. THS (Toyota Hybrid System) Control System The DTCs (Diagnostic Trouble Codes) for the following detection item have been changed in accordance with SAE requirements:...
  • Page 4 INTRODUCTION - OUTLINE OF NEW FEATURES 6. 1NZ-FXE Engine " The construction of the EVAP (evaporative emission) control system has been changed. The VSV (for Canister Closed Valve) used on the ’05 models has been discontinued, and a canister pump module is used on the ’06 models.
  • Page 5 " The display color is made up from 32,000 colors, realizing the excellent design of the screen. " The navigation voice guidance is available in three languages: English, French and Spanish. 12. TOYOTA Parking Assist System A rear view monitor system is available as optional equipment on all models.

  • Page 6: Exterior Appearance

    INTRODUCTION - EXTERIOR APPEARANCE EXTERIOR APPEARANCE 01RMO04Y 01RMO05Y...

  • Page 7: Model Code

    INTRODUCTION - MODEL CODE & MODEL LINE-UP MODEL CODE NHW20 L - A H E E B A BASIC MODEL CODE GEAR SHIFT TYPE NHW20: With 1NZ-FXE Engine E: Automatic GRADE STEERING WHEEL POSITION E: Standard L: Left-hand Drive ENGINE SPECIFICATION MODEL NAME B: Atkinson A: Prius...
  • Page 8 - MEMO -...
  • Page 9 NEW FEATURES - EXTERIOR NEW FEATURES EXTERIOR AHEADLIGHT " A newly designed headlight that is integrated with a clearance light and a turn signal light is used. " A condenser lens that also provides a light distribution function is used below the turn signal light in order to achieve an innovative look.
  • Page 10 NEW FEATURES - EXTERIOR AFRONT SPOILER A new front spoiler, which is made of TSOP (Toyota Super Olefin Polymer) that excels in recyclability, has been provided under the front bumper for enhanced appearance. 01RMO10Y 01RMO11Y Front Spoiler ’06 Model ’05 Model AREAR COMBINATION LIGHT "...
  • Page 11 NEW FEATURES - 1NZ-FXE ENGINE 1NZ-FXE ENGINE ENGINE CONTROL SYSTEM 1. General The engine control system of the 1NZ-FXE engine on the ’06 models has following systems. ’06 ’05 System Outline Models Models An L-type SFI system directly detects the intake air (Sequential Multiport Fuel mass with a hot wire type mass air flow meter.
  • Page 12 NEW FEATURES - 1NZ-FXE ENGINE ’06 ’05 System System Outline Outline Models Models The ECM controls the purge flow of evaporative emission (HC) in the canister in accordance with engine conditions. EVAP (Evaporative Approximately five hours after the power source mode Emission) Control System has been selected to OFF, the ECM operates the leak [See page 16]...
  • Page 13 NEW FEATURES - 1NZ-FXE ENGINE 2. Construction The configuration of the engine control system in the 1NZ-FXE engine is shown in the following chart. SENSOR ACTUATOR MASS AIR FLOW METER No. 1 INJECTOR No. 2 INJECTOR INTAKE AIR TEMP. SENSOR No.
  • Page 14 NEW FEATURES - 1NZ-FXE ENGINE COOLING FAN CONTROL IGSW ENGINE SWITCH COOLING FAN RELAY PPMP CANISTER PRESSURE SENSOR EVAPORATIVE EMISSION CONTROL EVP1 BATT Purge VSV BATTERY VSV (for Purge Flow MREL Switching Valve) EFI MAIN RELAY CANISTER PUMP MODULE MPMP LEAK DETECTION PUMP WFSE DLC3...
  • Page 15 The EVAP service port provided on the ’05 models is removed from the ’06 models. NOTICE The pinpoint pressure test procedure is carried out by pressurizing the fresh air line that runs from the canister pump module to the fuel filler neck. For details, refer to the 2006 Prius Repair Manual (Pub. No. RM01R0U).
  • Page 16 NEW FEATURES - 1NZ-FXE ENGINE System Diagram Purge VSV Purge Line To Intake Manifold VSV (For Purge Flow Switching Valve) Canister EVAP Line Recirculation Line Canister Pump Module Filter Vent Fuel Tank Valve Pressure Fresh Air Line Sensor Canister Filter Leak Detection Pump Canister Pressure Sensor Fuel Tank...
  • Page 17 NEW FEATURES - 1NZ-FXE ENGINE Function of Main Components Component Function Contains activated charcoal to absorb the vapor gas that Canister is created in the fuel tank. Fresh air goes into the canister and the cleaned drain air Fresh Air Line goes out into the atmosphere.
  • Page 18 NEW FEATURES - 1NZ-FXE ENGINE Construction and Operation 1) Fuel Inlet (Fresh Air Line Inlet) The flesh air from the atmosphere and drain air cleaned by the canister will go in and out to the system through the passage shown below. Fresh Air Fuel Tank Cap To Filter...
  • Page 19 NEW FEATURES - 1NZ-FXE ENGINE 2) Canister Pump Module Canister pump module consists of the vent valve, canister pressure sensor, and leak detection pump. The vent valve switches the passages in accordance with the signals received from the ECM. A DC type brush-less motor is used for the pump motor. A vane type vacuum pump is used.
  • Page 20 NEW FEATURES - 1NZ-FXE ENGINE System Operation 1) Purge Flow Control When the engine has satisfied the predetermined conditions (closed loop, engine coolant temperature above 74_C (165_F), etc.), the stored vapor gas are purged from the canister whenever the purge VSV is opened by the ECM.
  • Page 21 If a leak is detected, the MIL illuminates to inform the driver. Also, the DTC can be accessed through the use of a hand-held tester. For details, refer to the 2006 Prius Repair Manual (Pub. No. RM01R0U). Purge VSV (Open)
  • Page 22 NEW FEATURES - 1NZ-FXE ENGINE 4) EVAP Leak Check a. General The EVAP leak check operates in accordance with the following timing chart: " Timing Chart ON (Open) Purge VSV OFF (Close) Vent Valve OFF (Vent) Leak Detection Pump Atmospheric Pressure System Pressure 0.02 in.
  • Page 23 NEW FEATURES - 1NZ-FXE ENGINE b. Atmospheric Pressure Measurement 1) When the power source mode is selected to OFF, the purge VSV and the vent valve are turned OFF. Therefore, the atmospheric pressure is introduced into the canister. 2) The ECM measures the atmospheric pressure through the signals provided by the canister pressure sensor.
  • Page 24 NEW FEATURES - 1NZ-FXE ENGINE c. 0.02 in. Leak Pressure Measurement 1) The vent valve remains OFF, and the ECM introduces atmospheric pressure into the canister and actuates the leak detection pump in order to create a negative pressure. 2) At this time, the pressure will not decrease beyond a 0.02 in. leak pressure due to the atmospheric pressure that enters through a 0.02 in.
  • Page 25 NEW FEATURES - 1NZ-FXE ENGINE d. Vacuum Introduction 1) While the leak detection pump is actuated, the ECM turns ON the vent valve in order to introduce a vacuum into the canister. 2) When the pressure in the system stabilizes, the ECM measures and memorizes the pressure. Purge VSV (OFF) ECM VSV (For Purge Flow Switching Valve)
  • Page 26 NEW FEATURES - 1NZ-FXE ENGINE e. Purge VSV Monitor 1) After an EVAP leak check is completed, the ECM turns ON (open) the purge VSV with the leak detection pump actuated, and introduces the atmospheric pressure from the intake manifold to the canister.
  • Page 27 NEW FEATURES - 1NZ-FXE ENGINE f. Repeat 0.02 in. Leak Pressure Measurement 1) While the ECM operates the vacuum pump, the purge VSV and vent valve turn OFF and a repeat 0.02 in. leak pressure measurement is performed. 2) The ECM compares the measured pressure with the pressure memorized in vacuum introduction. 3) If the pressure memorized in vacuum introduction is below the measured value, the ECM determines that there is no leakage.
  • Page 28 NEW FEATURES - 1NZ-FXE ENGINE 4. Diagnosis The following DTCs (Diagnostic Trouble Codes) are added. Detection Item Detection Item Evaporative Emission Control System Fuel Tank Pressure Sensor/Switch High P043E P1453 Reference Orifice Clog Up Input Evaporative Emission Control System Evaporative Emission System Leak P043F P2401 Reference Orifice High Flow...

  • Page 29: Tire Pressure Warning System

    NEW FEATURES - TIRE PRESSURE WARNING SYSTEM TIRE PRESSURE WARNING SYSTEM ADESCRIPTION " A direct-sensing type tire pressure warning system has been newly provided as standard equipment. " If the vehicle continues to be driven with one or more of the four tires inflated to a low tire pressure that could cause problems in driving, this system will illuminate the tire pressure warning light to inform the driver of the low tire pressure.
  • Page 30 NEW FEATURES - TIRE PRESSURE WARNING SYSTEM 2. Layout of Main Components Combination Meter (Tire Pressure Warning Light) Tire Pressure Warning ECU Tire Pressure Warning Tire Pressure Warning Antenna and Receiver Reset Switch Speed Sensors Tire Pressure Warning Valves and Transmitters 01RCH01Y...
  • Page 31 NEW FEATURES - TIRE PRESSURE WARNING SYSTEM 3. Function of Main Components Component Function Integrated in the air valve on the disc wheel, this transmitter measures Tire Pressure Warning Valve the tire pressure and transmits the measured value and an ID code for and Transmitter identifying the wheel.
  • Page 32 " Make sure to replace the tires in accordance with the prescribed procedure. Failure to do so could damage the tire pressure warning valves and transmitters. " For further details regarding the above, refer to the 2006 PRIUS Repair Manual (Pub No. RM01R0U). Valve Portion...
  • Page 33 NEW FEATURES - TIRE PRESSURE WARNING SYSTEM 6. Tire Pressure Warning Reset Switch " By operating the tire pressure warning reset switch, the tire pressure warning ECU can be set to issue a warning at the tire pressure that corresponds to the type of tires. Therefore, the dealer must set the warning threshold to the proper value in order to comply with the local regulations.
  • Page 34 8. Diagnosis The new diagnostic system features improved serviceability. For details on the diagnostic methods and diagnostic items, refer to the 2006 PRIUS Repair Manual (Pub No. RM01R0U). 9. Fail-safe In the event of the malfunction in the tire pressure warning valve and transmitter circuits or tire pressure warning ECU and receiver, the tire pressure warning system is prohibited, and the tire pressure warning light illuminates or blinks to inform the driver of the failure.

  • Page 35: Srs Airbag System

    30 kg (66 lb) +/- 3 kg (6.6 lb) when a 30 kg (66 lb) weight is placed on the front passenger seat. For details, see the 2006 Prius Repair Manual (Pub. No. RM01R0U).
  • Page 36 NEW FEATURES - SRS AIRBAG SYSTEM 2. Wiring Diagram SVC2 SVC1 Occupant Classification SIG2 SIG1 Occupant Classification Sensor (Front LH) Sensor (Front RH) SGD1 SGD2 SVC4 SVC3 Occupant Classification Occupant Classification SIG3 SIG4 Sensor (Rear LH) Sensor (Rear RH) SGD3 SGD4 Combination Meter Occupant...
  • Page 37 NEW FEATURES - SRS AIRBAG SYSTEM 3. Layout of Main Components SRS Warning Light Airbag ON Airbag OFF Indicator Light Indicator Light Front Passenger Seat Belt Reminder Light Occupant Classification ECU DLC3 Occupant Classification Sensors Front Seat Inner Belt Airbag Sensor Assembly Seat Belt Buckle Switch 01SBE03Y...
  • Page 38 NEW FEATURES - SRS AIRBAG SYSTEM 2. Occupant Classification Sensor The occupant classification sensors are installed on four brackets connecting the seat rail and the seat frame. The resistance values of these sensors which vary in accordance with the distortion that acts on the brackets are output to the occupant classification ECU.
  • Page 39 NEW FEATURES - SRS AIRBAG SYSTEM 4. System Operation General This system makes the following judgments: unoccupied judgment, child seat judgment, child judgment, and adult judgment. In addition, it performs an initial check to check the circuit of the AIRBAG ON/OFF indicator lights when the power source mode is IG-ON.
  • Page 40 NEW FEATURES - SRS AIRBAG SYSTEM Child Seat or Child Judgment If the judgment value is lower than criteria value “B” and the seat belt buckle switch is ON, the occupant classification ECU judges that a child seat is installed. If the judgment value is higher than criteria value “A”, but lower than criteria value “B”, and the seat belt buckle switch is OFF, the occupant classification ECU judges that the seat is being occupied by a child.
  • Page 41 NEW FEATURES - SRS AIRBAG SYSTEM Adult Judgment When the judgment value is higher than criteria value “B”, the occupant classification ECU judges that the seat is being occupied by an adult. If the power source mode is selected to IG-ON in this state, the system performs an initial check and illuminates the AIRBAG ON indicator light, indicating that the front passenger airbag and front passenger side airbag are active.
  • Page 42 NEW FEATURES - SRS AIRBAG SYSTEM 5. Precaution for Occupant Classification System Operation To avoid potential death or serious injury when the front passenger occupant classification system does not detect the conditions correctly, observe the following. Wear the seat belt properly. Make sure the front passenger seat belt tab has not been left inserted into the buckle before someone sits in the front passenger seat.
  • Page 43 NEW FEATURES - SRS AIRBAG SYSTEM JDIAGNOSIS 1. General If the airbag sensor assembly detects a malfunction in the SRS airbag system, the airbag sensor assembly stores the malfunction data in memory, in addition to illuminating the SRS warning light. The airbag sensor assembly outputs malfunction data, 5-digit DTCs (Diagnostic Trouble Codes) or 2-digit DTCs, to the hand-held tester or the SRS warning light.
  • Page 44 3. DTC of Occupant Classification System There is only a 5-digit DTC for the occupant classification system. The 5-digit DTC can be read by connecting a hand-held tester to the DLC3 terminal. For details, see the 2006 Prius Repair Manual (Pub. No. RM01R0U).
  • Page 45 NEW FEATURES - TOYOTA PARKING ASSIST SYSTEM TOYOTA PARKING ASSIST SYSTEM REAR VIEW MONITOR SYSTEM 1. General The rear view monitor system is available as optional equipment. To assist the driver in parking the vehicle by monitoring the rear view, this system has a television camera mounted on the back door to display the rearview of the vehicle on the multi display.
  • Page 46 NEW FEATURES - TOYOTA PARKING ASSIST SYSTEM 2. Layout of Main Components Multi Display Television Camera ECU HV ECU Television Camera 01SBE02Y " Function of Main Components Item Function Mounted on the back door to transmit the rearview of the vehicle to the multi display.
  • Page 47 NEW FEATURES - TOYOTA PARKING ASSIST SYSTEM 3. Operation General With the power source mode IG-ON, if the driver moves the electronic shift lever to reverse, the display of the multi display switches to operate this system. In this state, if the driver moves the electronic shift lever to a position other than reverse, or selects the modes on the multi display, the rear view display switches to the previous mode or the mode selected on the multi display.
  • Page 48 The method for starting the diagnosis menu screen is the same as in the navigation system. For details, refer to the 2006 Prius Repair Manual (Pub. No. RM01R0U). 4. Handling Precaution In the following cases, it may become difficult to see the images on the screen, but this is not a malfunction.
  • Page 49 APPENDIX MAJOR TECHNICAL SPECIFICATIONS Area U.S.A. Canada Item Body Type 4-door Hatchback Vehicle Grade — Model Code NHW20L-AHEEBA NHW20L-AHEEBK Length mm (in.) 4445 (175.0) 4445 (175.0) 1725 (67.9) 1725 (67.9) Overall Width mm (in.) Height* mm (in.) 1490 (58.7) 1490 (58.7) Wheel Base mm (in.) 2700 (106.3)

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