Kia Sorento 2003 Technical Highlights
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Kia Sorento 2003 Technical Highlights

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Summary of Contents for Kia Sorento 2003

  • Page 2 2003 Sorento Technical Highlights • Contents Section 1 General Information Section 2 Engine Section 3 Engine Electrical Section 4 Fuel and Emissions Section 5 Transmission & Drivetrain Section 6 Brakes Section 7 Steering and Suspension Section 8 Body Section 9 Body Electrical Section 10 Supplemental Restraint System...
  • Page 3 © 2002 Kia Motors Corporation Service Training Department All rights reserved. This publication may not be reproduced in whole or in part without the written consent of Kia Motors Corporation. revised version 3...
  • Page 4 Section 1 • General Information This Sorento Technical Highlights publication your initial model introduction training for the 2003 How to Use serves two important purposes. Used with the 2002 Sorento. Information about service procedures that This Manual Sorento Technical Highlights video, it’s your key are specific to the new systems is also included.
  • Page 5 Section 1 • General Information There are two Trim Levels for the 2003 General Infor- Sorento: LX and EX. Both trim levels feature the mation Sigma 3.5 V6 engine and the 30-40LEI 4-speed automatic transmission. The general specifications given here are for Vehicle general information only, and are subject to Specifications...

  • Page 6: Air Conditioner

    Section 1 • General Information Lubricant Volume (SAW/Metric) Classification Capacities Engine Oil 5.8 quarts/5.5 liters API Service SD or above Transmission Oil 9 quarts/8.5 liters Dextron III Coolant 3 gallons/11.4 liters Brake Fluid 1.4 quarts/1.3 liters SAE J1703, FMVSS 116 DOT 3 or DOT 4 Fuel 21.1 gallons/80 liters...
  • Page 7 Production (Frame) K = Korea Sequence 2***, 3 = 4996-5984 Number GVWR Lbs. Manufacturer Engine/ N = Kia Motors Corp. Restraint 3 = 3.5L V6 Dual Airbag Vehicle Type D = MPV Check Digit Must be 0 - 9 or X...
  • Page 8 Section 1 • General Information—Mechanical Features and Options 3.5 DOHC 6-cylinder (192 HP) 4-Speed automatic Engine speed sensing — Power Steering Vehicle speed sensing — Steering linkage Rack & pinion Hood blanket Front: Wish-bone w/coil spring Suspension Rear: 5-Link coil spring Gas shocks Fuel tank 80 liters / 21.1 gallons...
  • Page 9 Section 1 • General Information—Exterior Features and Options Styled steel — Wheels Alloy (bright machine finish face) P245/70R16 (domestic bound) — Tires P245/70R16 (Michelin) — Full size spare tire under vehicle (alloy steel if equipped with alloys) Mudguards Windshield Solar control glass Side glass (B-pillar back) Privacy glass Power sunroof (tilt and slide)
  • Page 10 Section 1 • General Information—Interior Features and Options Double raschel cloth seat and door trim — Seat upholstery & trim inserts Moquette velour cloth seat and door trim — Leather — O/Lux 8-Way manual adjustment (driver) — 8-Way power adjustment (driver) —...
  • Page 11 Section 1 • General Information—Convenience Features and Options Dome lights with fade-out feature (illuminated entry and exit) and I/P dimmer switch master control In-door safety/courtesy lights Large felt-lined coinholder bin Under seat storage bin Rear quarter panel storage bins Digital clock (in dash) Tachometer Horn Dual...
  • Page 12 Section 1 • General Information—Audio Systems, Safety Features and Options Audio Systems AM-FM/CD 8 speakers/6 enclosures — Delphi premium AM/FM/Cassette/CD audio with separate amplifier, 10 speakers/6 enclosures — Delphi premium AM/FM 6 disk in-dash CD with separate amplifier, 10 speakers/6 enclosures —...
  • Page 13 Section 1 • General Information—Options Options Luxury Package (available on EX grade only) Options • ABS (all) • Optional 4WD-torque on demand type • Self-Levelizer (EX) • Chrome outside door handles • Floor mats (LX) • Chrome rear garnish • Cargo tray (all—PIO) •...
  • Page 14 Section 1 • General Information Exterior Sorento Exterior Color Matrix and Interior - KMA - Colors Interior Color (LX/EX) Code Exterior Color Beige (44) Gray (BT) Clear White Silky Beige — Silver Metallic — Misty Blue Blue Sapphire Ruby Red Dark Emerald Green Midnight Black —...
  • Page 15 (1) - This maintenance is required in all states except California, However, we recommend that it also be performed on California vehicles. (2) - This maintenance is recommended by Kia. However, it is not necessary for emission warranty coverage or manufacturer recall liability.
  • Page 16 Section 2 • Engine The Sorento is equipped with a Sigma 3.5 Liter Sigma 3.5 engine, which is the same as the Sedona but with a Engine different Variable Intake System. The intake manifold utilizes a variable intake system, which extends the torque curve, by selecting designated intake runners to improve performance.
  • Page 17 Section 2 • Engine 1 Variable Intake System 2 Exhaust Manifold 3 Thermostat Housing 4 Engine Block 5 Bracket 6 Dipstick Tube Power steering pulley Drive Belts Tensioner pulley Accessory mounting bracket • Three drive belts • Three tensioners Water pump pulley Tensioner pulley Air conditioner pulley...
  • Page 18 Section 2 • Engine Timing mark Timing mark Timing Belt Water pump pulley Camshaft position Camshaft sprocket sensor Tensioner arm Idler pulley Tensioner pulley Engine support bracket Auto tensioner Crankshaft position Sensor Crankshaft sprocket Timing mark To the reservoir Cooling From the reservoir System From heater...
  • Page 19 Section 3 • Engine Electrical The Sigma 3.5 V6 engine uses a distributor- Ignition less ignition system with the ECM controlling System and monitoring ignition system functions. Three ignition coils are located above cylinders 2, 4, and 6 (cylinder bank 2); three spark plug wires connect the coil assemblies to cylinders 1, 3, and 5.
  • Page 20 Section 3 • Engine Electrical The 2003 Sorento uses a single 12V 600CCA Battery battery. Engine cooling and condenser fans are ECM- Cooling/ controlled through a series of three fan relays Condenser located in the engine compartment fuse and re- Fan Control lay box.
  • Page 21 Section 4 • Fuel and Emissions—General The 2003 Sorento is fitted with a Mitsubishi General Electronics Company Engine Management Information System (MELCO), utilizing a 32-bit ECM with a separate TCM. The ECM and TCM communicate via a Controller Area Network (CAN). Sequential Multiport Fuel Injection is incorporated and a dis- tributorless ignition system is used.
  • Page 22 Section 4 • Fuel and Emissions Fuel delivery on the 2003 Sorento is ECM con- Fuel Delivery trolled. Fuel pressure from the in-tank pump is man- aged via a pressure regulator installed on the fuel rail (49-50 PSI unregulated pressure; 39 PSI regu- lated).
  • Page 23 Section 4 • Fuel and Emissions—Sensors Input Output Input/Output Oxygen Sensor (Bank 1, Sensor 1) Manifold Differential Pressure Sensor Ignition Oxygen Sensor (Bank 1, Sensor 2) Knock Sensor Injector Oxygen Sensor (Bank 2, Sensor 1) Fuel Level Sensor Idle Speed Cont. Motor Oxygen Sensor (Bank 2, Sensor 2) Fuel Tank Pressure Sensor Main Relay Control...
  • Page 24 Section 4 • Fuel and Emissions—Sensors The Throttle Position Sensor (TPS) consists of Throttle a potentiometer together with an idle switch, which Position is installed on the throttle body assembly. TPS in- Sensor (TPS) formation is shared with the TCM via the Controller Area Network (CAN).
  • Page 25 Section 4 • Fuel and Emissions—Sensors Four Zirconia type Heated Oxygen Sensors Heated (HO2S) are installed on the 2003 Sorento (two up- Oxygen stream, two downstream). The front HO2S provide Sensors exhaust gas oxygen content information to the ECM (HO2S) for air/fuel ratio control in the closed loop mode.
  • Page 26 Section 4 • Fuel and Emissions—Sensors The Crankshaft Position Sensor (CKP) is of the Crankshaft Hall-Effect type. The CKP is mounted adjacent to Position the crankshaft sprocket underneath the lower timing Sensor (CKP) cover. A three-blade trigger wheel is mounted be- hind the crankshaft sprocket.
  • Page 27 Section 4 • Fuel and Emissions—Sensors A Fuel Tank Pressure Sensor (FTPS) is located Fuel Tank on the fuel delivery module. The ECM evaluates Pressure FTPS signal information for purge and close valve Sensor operation in addition to testing the EVAP system for (FTPS) the presence of a leak.
  • Page 28 Section 4 • Fuel and Emissions—Sensors The ECM uses the Manifold Absolute Pressure Manifold Sensor (MAP) signal to adapt the fuel system to Absolute variances caused by changes in altitude. The MAP Pressure is located on the passenger side of the intake plenum Sensor near the throttle body.
  • Page 29 Section 4 • Fuel and Emissions—Actuators The ECM controls idle speed via a stepper mo- Fast Idle Air tor installed on the throttle body. Battery voltage is Valve (FIAV) Speed Adjusting Screw (SAS) supplied to the ISC motor at two of the six termi- nals (the remaining four pins are for ECM control signals).
  • Page 30 Section 4 • Fuel and Emissions—Actuators The ECM controls the Purge Solenoid Valve Purge (PSV) using a duty-cycle signal to facilitate canis- Solenoid ter purging. The PSV is also operated during EVAP Valve (PSV) leakage monitoring. PSV Resistance Specification • 30-34 ohms @ 68°F The Canister Close Valve (CCV) is located on the Canister EVAP canister which is underneath the vehicle for-...
  • Page 31 Section 4 • Fuel and Emissions Low to medium speed torque is boosted with a Variable variable intake manifold controlled by the ECM via Intake a Variable Intake Control System. (VICS). The Control VICS consists of an actuator (operated by engine System vacuum) and a solenoid which is turned ON (open) (VICS)
  • Page 32 Section 4 • Fuel and Emissions The Main Relay supplies power to sensors and Main Relay actuators which require 12VDC, and provides main battery power to the ECM (keep-alive memory is maintained through a separate connection). The relay remains active for about 10-12 seconds at key OFF for adaptation value, ISC initialization, and fault status storage purposes.
  • Page 33 Section 4 • Fuel and Emissions The following monitoring functions are performed Small Leak Test (.5mm) OBD-II in accordance with OBD-II regulations: • Fuel Temp: 32-113°F Monitoring • Catalyst Efficiency Monitoring Functions • ECT at start: <140°F • Misfire Monitoring •...
  • Page 34 Section 4 • Fuel and Emissions The 2003 Sorento is fitted with two Data Link ECU ROM ID Hi-Scan Pro Connectors (DLC). A 20-pin DLC is installed in Diagnosis Displays the ROM ID of the ECM. the engine compartment in addition to the J-1962 Idle RPM Adjust Mode 16-pin connector (OBD-II DLC).
  • Page 35 Section 5 • Transmission The Sorento automatic transmission is the Aisin Automatic Warner 30-40LEi Model, a four-speed, Electronical- Transmission ly Controlled Automatic Transmission (ECAT) with a lock-up torque converter. Unlike the Sportage, which uses a throttle cable to control hydraulic pres- sure, the Sorento uses a pressure control solenoid valve.
  • Page 36 Section 5 • Transmission System Layout Item Function Output speed sensor Detects output shaft revolution Neutral switch Detects “N” range (A/T) or “Neutral” range (M/T) A/T inlet tube From cooler to A/T A/T outlet tube From A/T to cooler Air breather hose For air ventilation inside transmission Oil temperature sensor Detects the oil temperature...
  • Page 37 Section 5 • Transmission Output Shaft revised version 3...
  • Page 38 Section 5 • Transmission—Sensors & Switches Neutral Start Switch (NSW) Electronic Control Parts The Neutral Start Switch (NSW) sends the auto- and Their matic transmission’s shift lever position to TCM. Operation • The NSW only allows the engine to start in “P” and “N”.
  • Page 39 Section 5 • Transmission—Sensors & Switches The Oil Temperature Sensor converts ATF tem- perature variation into electronic signals to transmit Temperature to the TCM. This information is necessary for shift Sensor (OT) control and Lock-up control, etc. Resistance Specifications • At 32°F resistance should be 1,884 –2,290 ohms.
  • Page 40 Section 5 • Transmission—Sensors & Switches The Input Speed Sensor (CO) detects A/T in- Input Speed put speed from the rotation speed of the over-drive Sensor (CO) direct clutch, and transmits this to the TCM. The input speed sensor will supply default data for gear shifting in case the output speed sensor fails.
  • Page 41 Section 5 • Transmission—Sensors & Switches The Throttle Position Sensor (TPS) is the most Throttle important component used to determine shift timing Position control. If the TPS sensor fails, the TPS data will Sensor (TPS) default to 0% and maximum line pressure will be applied to protect all operating components of the transmission.
  • Page 42 Section 5 • Transmission—Actuators This solenoid is a Normally Open (NO) type. Lock-up According to each lock-up shift schedule, the TCM Solenoid (SL) sends signals to the lock-up solenoid valve. ON/OFF control of the lock-up solenoid by the TCM is based on the vehicle speed and the throttle opening.
  • Page 43 Section 5 • Transmission The wiring for the Shift Solenoid No. 1, No.2, Shift the Lock-up Solenoid and SLT are assembled in one Solenoid connector, and are installed in the A/T case. No. 1 & No. 2 Wiring 1. Procedure to install the lock cam. Spring roller Shift Lock •...
  • Page 44 Section 5 • Transmission—Electronic Controls The basic part of all electronic control systems TCM Logic is the TCM. The TCM is an electronic device that receives information, stores information, and com- municates information. To a TCM, certain voltage and current values mean something and based on these values the TCM is informed.
  • Page 45 Section 5 • Transmission—Electronic Controls TCM Input and Output Terminal Voltage Table (Accurate at time of printing; data used for world market.) Input & Output Signal Pin Name Condition Remark Level Type SCSV 1 Driving Vbatt - DV SCSV1: Shift Control Solenoid Frequency (1st, 2nd speed operation) (P,N/1st/2nd/3rd/4th speed)
  • Page 46 Section 5 • Transmission—Electronic Controls Input & Output Signal Pin Name Condition Remark Level Type Continually (10.4Kbps) Logic “0” : Vbatt 20% ↓ K-Line Pulse Logic “1” : Vbatt 80% ↑ S/W OFF V (Ignition 1) Diag. Switch S/W ON -0.3 - 1.0V Vbatt Inhibitor Switch (2)
  • Page 47 Section 5 • Transmission—Electronic Controls Shifting is based on inputs to a computer from Shift Control various sensors, such as engine temperature, engine speed, throttle position, oil temperature, and gear se- lector position. The TCM compares the information from the sensors against the shifting instructions programmed into it.
  • Page 48 Section 5 • Transmission—Electronic Controls The Damper Clutch or lock-up clutch is engaged Damper for less fuel consumption while driving and to re- Clutch duce exhaust gas emissions. Control When the shift lever is moved from “N” to “D”, Squat the Squat Control operation temporarily shifts to Control 3rd gear to reduce shifting shock and a “squatting”...
  • Page 49 Section 5 • Transmission—Electronic Control Purpose Adaptive Shift Control • Optimal shift control according to the road and driving condition. Functions • Up hill mode: To prevent frequent gear shifting and improve performance and fuel consumption. • Down hill mode: Use engine braking as a brake for improved driving stability.
  • Page 50 Section 5 • Transmission—Electronic Control Adaptive Shift Control (Down Slope with down slope mode. Adaptive Mode) Shift Control While driving downhill, the engine brake operates automatically according to the accelerator position and braking conditions at a certain slope degree: • Down Slope mode engages when road slope ex- ceeds 4.5% gradient down slope occurs for longer than 1 second.
  • Page 51 Section 5 • Transmission—Diagnosis Stall Test Procedure Trouble- • Check ATF fluid level. Purpose shooting/ Diagnosis • Hook up transmission pressure tester to test port • To check the slip of components and overall per- on the side of the transmission. formance of the transmission.
  • Page 52 Section 5 • Transmission—Diagnosis Automatic Transmission Line Pressure 5. Read the oil pressure as soon as the engine speed Trouble- becomes constant, then release the accelerator Test shooting/ pedal. Diagnosis 1. Connect the SST to line pressure inspection port Note: Steps 4 and 5 must be performed within five of transmission case.
  • Page 53 Section 5 • Drivetrain—Transfer Case four-wheel-drive system. The EST utilizes a Free General Running Differential (FRRD) to adapt the front Information axle to Shift on the Fly (SOF). The driver can acti- vate the high range of the four-wheel-drive system at speeds up to 50 mph (80km/h).
  • Page 54 Section 5 • Drivetrain—Transfer Case gage four-wheel-drive in the transfer case. Once the motor causes a gear change in the transfer case that four-wheel-drive engages, the 4H Indicator Light will provide a gear reduction for the transfer case will illuminate steadily on the instrument panel. The output.
  • Page 55 Section 5 • Drivetrain—Transfer Case pack to apply the clutch. In this manner, the clutch Active application pressure is achieved by using an inclined Torque plane, rather than just a magnet (like an AC clutch. Transfer The duty cycle application of the magnet allows for System (ATT) almost infinite control of the drive to the front axle regardless of the road surface the vehicle is operated...
  • Page 56 Section 5 • Drivetrain—Transfer Case the TOD clutch pack are accomplished by activating The TOD system’s advantage over the part time the magnetic clutch using a duty cycle, the shorter four-wheel-drive system or other competitive hy- the duty cycle, the less application pressure in the draulically activated full-time four-wheel-drive clutch pack.
  • Page 57 Section 5 • Transmission—DTCs DTC NO. SENSOR OR SOLENOID Σ3.5 Type Vehicle speed signal from meter set Brake SW malfunction P0707 Inhibitor switch circuit low input P0708 Inhibitor switch circuit high input P0716 Input speed sensor circuit range/performance P0717 Input speed sensor circuit no signal P0722 Output speed sensor circuit no signal P0726...
  • Page 58 Section 5 • Torque On Demand—DTCs Description P-Code Failure Effect Fail-Safe W/Lamp EEPROM Default calibration data P1725 — checks UM fault TPS loss of signal TOD determined by wheel P1726 TOD (TPS idle) slip only TPS out of range TOD determined by wheel P1727 TOD (TPS idle) slip only...
  • Page 59 Section 5 • Transmission—DTCs In case a driver turns the OD OFF switch on or not shift down until the vehicle speed is reduced. Engine Over- changes a shift lever to the “2L” range while driving This will prevent the engine from over-revving. run Inhibition in 4th gear in “D”...
  • Page 60 Section 5 • Special Service Tools Group Type Tool Number/Name Illustration Unique Remark use with: 09452-21500 TRA— 09452-21000 09452-21600 Auto. 03-40LEi Oil pressure gauge 09452-32300 Trans. adapter use with: TRA— 09452-21500 09452-21600 Auto. 03-40LEi Oil pressure gauge 09452-21000 Trans. 09452-32300 use with: TRA—...
  • Page 61 Section 5 • Special Service Tools Group Type Tool Number/Name Illustration Unique Remark use with: 09500-11000 DS— 09542-4A000 Driveline Oil seal installer Systems use with: 09500-21000 DS— 09532-31200B Driveline Oil seal installer Systems use with: OK993 270 A08 DS— OK993 270 A09 OK993 270 A10 Driveline Drive pinion...
  • Page 62 Section 6 • Brakes—Non-ABS The 2003 Sorento feature four-wheel disc brakes General which receive fluid pressure from a diagonally-split Information brake line configuration. The brakes for both front and rear use floating calipers with vented discs. The brake calipers in the front are dual-piston, while the rear calipers are single piston.
  • Page 63 Section 6 • Brakes—ABS Acceleration Sensor Anti-Lock The four wheels of an AWD (all Wheel Drive)/ Brake 4WD vehicle are linked by the center differential, System so the engine braking force acts on all the wheels. In (ABS) the event one of the tires of an AWD vehicle begins to slip, the torque of the tire that is beginning to slip is distributed to the other tires, making the rotation speed of all the tires virtually identical.

  • Page 64: Warning Lamps

    Section 6 • Brakes—ABS Description Check Point C0800 High voltage (over 16V) Battery voltage, wire, fuse C0800 Low voltage (8V or less) Battery voltage, wire, fuse C0035 WSS FL - continuity WSS, connector, wire harness C0035 WSS FL - plausibility Wire check, short, air gap, tooth C0040 WSS FR - continuity...
  • Page 65 Section 6 • Brakes—EBD The Electronic Brake force Distribution (EBD) an ideal brake balance under varying conditions of Electronic system is a sub-system of the ABS system and con- vehicle weight and weight distribution. Also, a mal- Brake trols the effective adhesion by the rear wheels. function of a proportioning valve manifests itself Distribution It further utilizes the efficiency of highly devel-...
  • Page 66 Section 7 • Steering and Suspension The 2003 Sorento is equipped with an Engine system’s hydraulic pressure which is converted into Steering RPM Sensing power-assisted rack and pinion steer- mechanical force through the rack and pinion steer- ing system. Vehicle Speed Sensing power steering ing gear to turn the wheels.
  • Page 67 Section 7 • Steering and Suspension The solenoid is opened partially and therefore EPS— when activating the valve, the reaction pressure Condition at in the reaction chamber will increase and create Low/Medium reaction torque which is working against the valve Speeds: deflection.

  • Page 68: Front Suspension

    Section 7 • Steering and Suspension Provisions have been made for fail-safe capability Fail-Safe during certain circumstances. VSS failure will cause Functions the EPSCM to allow maximum current (1A) to flow at all speeds; the result will be consistent light steer- ing effort.
  • Page 69 Section 7 • Steering and Suspension The 2003 Sorento is equipped with P245/70R16 Wheels and tires. Steel wheels are standard on the LX; alumi- Tires num wheels are standard on the EX (aluminum wheels are optional on the LX). The spare tire is a full-size unit mounted beneath the rear of the vehicle.
  • Page 70 Section 8 • Body The 2003 Sorento’s body has a powerful and pres- Overview tigious look, featuring a body-on-frame construction with nine cross members. A gusset plate has been added for additional rigidity. The front view of 2003 Sorento is wide and ag- gressive featuring a large size radiator grill.
  • Page 71 Section 9 • Body Electrical—ETACS The Electronic Time and Alarm Control Sys- Electronic tem (ETACS) directs the operation of various body Time & Alarm electrical functions. Control Availability of features varies with vehicle trim System level. (ETACS) ETACS Input & Output Diagram Inputs Controller Actuator...
  • Page 72 Section 9 • Body Electrical—ETACS The rear defogger timer provides for 20 min- Rear Window utes of rear defogger operation once the switch Defogger is pressed. Due to the current consumption of the Timer heater grid (15-20A), the defogger should only oper- ate while the engine is running.
  • Page 73 Section 9 • Body Electrical—ETACS The interior lights will immediately reduce to Interior 75% brightness once all doors are closed. The Lights Delay lighting will then fade out within a 5-6 second time Out Circuit period. Interior Light Delay Out Circuit Turning the key in the driver door lock cylinder to 2-Turn the UNLOCK position will unlock the driver door...
  • Page 74 Section 9 • Body Electrical—ETACS In addition to the audible warning produced with Ignition Key the key in the ignition cylinder and the driver door Reminder/ in the open position, the door locks will automati- Lock-out cally cycle to the UNLOCK position if an attempt is Protection made to lock the doors with the key in the ignition.
  • Page 75 Section 9 • Body Electrical The 2003 Sorento Remote Keyless Entry Sys- Remote tem, which comes standard on the EX, permits Keyless operation of the door lock/unlock functions from a Entry distance of up to 16 feet from the vehicle. The un- lock function on the RKE operates the same as the Two-Turn Unlock feature accessible from the driver door key cylinder;...
  • Page 76 Section 9 • Body Electrical The rear wiper functions are separate from the Rear Wiper ETACS. An ECU for rear wiper functions is located System in the tailgate. The rear wiper system features ON, intermittent, and momentary activation. The rear washer obtains fluid from the front reservoir.
  • Page 77 Full Auto Temperature Control (FATC) Temperature system. Both systems use R-134a, and are of the ex- Control pansion valve/receiver-dryer type (as are all Kia A/C (FATC) systems). A swash plate type compressor is fitted, and a parallel flow condenser is employed.

  • Page 78: Off Switch

    Section 9 • Body Electrical—Climate Control The optional FATC system features completely Full Auto automatic control over discharge air temperature, Temperature mode door operation, blower speed, and A/C com- Control pressor operation. A variety of sensors feed data to (FATC) a central control panel.
  • Page 79 Section 9 • Body Elect.—Climate Control, Actuators FATC Input Input Output and Output Display AMB Sensor High Speed Relay F/N Sensor Blower Speed In car Sensor Photo Sensor Power TR Control Humidity Module Auto Switch Temp Actuator Mix Door Off Switch A/C Switch Mode Actuator Mode Door...
  • Page 80 Section 9 • Body Elect.—Climate Control, Actuators For high speed operation, battery voltage is ap- High Speed plied directly to the blower motor via a relay located Blower Relay next to the blower motor. A 12-volt motor is controlled using a reverse-po- Intake Door larity circuit to select the source of intake air.
  • Page 81 Section 9 • Body Elect.—Climate Control, Actuators The Mode Door Actuator controls direction of Mode Door airflow based on signals from the FATC control Actuator unit. Inspection • Apply 12V to mode actuator terminal 7 and ground terminal 6. • Verify that the mode actuator operates as below when grounding terminals 5,4,3,2 and 1 in se- quence.
  • Page 82 Section 9 • Body Elect.—Climate Control, Sensors Fin Thermo Sensor FATC System The Fin Sensor is a negative temperature coef- Sensors ficient thermistor installed on the evaporator core. It is monitored by the FATC control circuitry to prevent evaporator freezing. The A/C compressor will shut down if evaporator temperature drops below 33°F.
  • Page 83 Section 9 • Body Elect.—Climate Control, Sensors In-Car Sensor FATC System The In-Car Sensor is located in the lower center Sensors console to the left of the FATC panel. This Negative Temperature Coefficient thermistor communicates vehicle interior temperature information to the FATC control unit.
  • Page 84 Section 9 • Body Elect.—Climate Control, Sensors Photo Sensor FATC System The Photo Sensor, located near the driver side Sensors defrost duct, uses a photovoltaic diode to transmit light level information to the FATC control unit. This compensates for changes in solar radiation by adjust- ing the blower speed and discharge temperature.
  • Page 85 Section 9 • Body Electrical—Diagnosis Self-diagnostics and fail-safe functionality are 3 Hold the A/C switch down, and press the Mode FATC Self- designed into the FATC system. Diagnostic Trouble switch more than three times within five sec- Diagnosis Codes are retrieved using the switches on the FATC onds.
  • Page 86 Section 9 • Body Electrical—Multimeter The Multimeter on the 2003 Sorento is similar Multimeter in exterior appearance to the Trip Computer on the 2002 Sedona. Functionality, however, is significant- ly different between the two units. The Multimeter on the 2003 Sorento is fitted with compass, altitude, barometric pressure, and temperature modes.
  • Page 87 Section 9 • Body Electrical—Multimeter Position correction should be performed if the matically performed; the “DRT” indicator will Position displayed bearing differs from the actual bearing of cease flashing when completed. This should be done Correction the vehicle, or if the battery has been disconnected. at speeds of 12.5MPH or less.
  • Page 88 Section 10 • Supplemental Restraint System Please consult the Service Manual for recommended • Passenger Airbag Module (PAB) General service procedures. • Left and Right Side Curtain Airbag Module Information The 2003 Sorento is equipped with the new Sie- (CAB) mens Smart Air Bag System.
  • Page 89 Section 10 • Supplemental Restraint System The SRS Control Module (SRSCM) is located SRS Control on the floor behind the shift lever and hand brake. Module Access the SRSCM connector by removing the rear panel of the center console. The primary functions of the SRSCM are crash detection, airbag and pre- tensioner activation, and monitoring the airbag and pretensioner systems.
  • Page 90 Section 10 • Supplemental Restraint System All firing current for airbag deployment must Safing go through the Safing Sensor. The safing sensor Sensor is a dual contact electromechanical switch, which closes if the vehicle deceleration exceeds a specified threshold. The operation of the sensor is completely inde- pendent of all electronic components in the SRSCM and the firing current must flow across the safing sensor contact to activate the airbag modules and/...
  • Page 91 Section 10 • Supplemental Restraint System The Passenger Airbag Module (PAB) is installed Passenger as part of the instrument panel assembly. The PAB Airbag features an invisible U-pattern tear seam. Deploy- Module ment of the PAB will require replacement of the in- strument panel.
  • Page 92 Section 10 • Supplemental Restraint System The front Seat Belt Pretensioners are incorpo- Seat Belt rated within the seat belt retractor and help to reduce Pretensioner the severity of injury during a collision. When the seat belt pretensioner is activated, it spools in the seat belt webbing, tightening the seat belt, and helps keep the occupant in position.
  • Page 93 Section 10 • Supplemental Restraint System The SRSCM monitors the buckle switches for the Seat Belt front seats to determine the threshold for activation Buckle of the air bags and occupants’ seatbelt pretension- Switch ers. During a low threshold collision, the seatbelt pretensioners only may be activated, provided that the seatbelts are buckled.
  • Page 94 Section 10 • Supplemental Restraint System The 2003 Sorento uses Seat Track Sensors to Seat Track determine the distance that each front seat is away Sensor from the air bag. If the seat track sensor detects that the seat is close to the air bag module, the SRSCM will cause the air bag to deploy with squib 1 and 2 firing simultaneously to reduce the risk of injury to the occupant.
  • Page 95 Section 10 • Supplemental Restraint System Diagnostic Trouble Codes for the 2003 Sorento • Access Kia Vehicle Diagnosis for SRS. supplemental restraint system are displayed as B • If a system fault is detected there is a possibility Diagnosis codes which must be retrieved using the Hi-Scan that the fault is not in the component but in SRS Pro.

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