Lighting: Overview Lexus IS II

SYSTEM DESCRIPTION

The system representations shown below are intended to show concept of operation, and may not precisely reflect the construction of the system on the vehicle.

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1. AUTOMATIC LIGHT CONTROL SYSTEM General When the light control switch is in the AUTO position, the automatic light control system detects ambient light levels and controls the headlights, parking lights, taillights, marker lights, and license plate lights. The Main Body ECU RH controls this system. The Headlight Dimmer Switch includes the Tilt and Telescopic Switch, Fog Switch, Turn Switch, Dimmer Switch, and Light Control Switch. The Headlight Dimmer Switch signals are received by the Windshield Wiper Switch assembly, the Windshield Wiper Switch assembly forwards these signals to the Main Body ECU RH using the Body Electronics Area Network (BEAN). A direct headlight backup link (HEAD) exists between the Windshield Wiper Switch assembly and the Main Body ECU RH. If this link is grounded, the headlights will illuminate. Ambient light levels are detected by the light control sensor that is integrated in the air conditioning system's solar sensor. This signal is received directly by the Main Body ECU RH (Cowl Side Junction Block RH). The dimmer circuit in the Combination Meter controls the ground for the panel illumination. The Combination Meter bases the control of the panel illumination on signals received from the Light Control Rheostat, and other inputs. The Main Body ECU RH controls the taillights and panel illumination using the Tail relay that is built into the Main Body ECU LH (Cowl Side Junction Block LH). The Main Body ECU RH controls the Low beam illumination using the HEAD LP relay. The Front Controller uses transistors to directly operate the High Beams for models that have DRL. For models without DRL, the Front Controller operates the High Beams using a HEAD HI relay that is built into the Front Controller. The Front Controller operates the Front Parking Lights and Front Marker Lights using the FR TAIL relay that is built into the Front Controller (Engine Room No. 2 Relay Block). The Front Controller operates the Front Fog Lights using the FR FOG relay that is built into the Front Controller (Engine Room No. 2 Relay Block).
2. MANUAL LIGHT CONTROL SYSTEM The function of the system is similar to the Automatic Light Control System, except the system is controlled according to the driver's inputs.
3. BI-FUNCTION The models with HID (High Intensity Discharge) headlights have a Bi-function. This Bi-function increases the upper illumination area of the discharge bulb (LO/HI beam) when the HI beam is turned on. If the LO beam is selected, the upper illumination area of the discharge bulb is blocked by a shade and only the lower illumination area is used. If the HI beam is selected, the headlight solenoid slides the shutter (shade) down to allow use of the upper illumination area, thus increasing the illumination area and improving visibility when the HI beam is on. This function is activated by the Front Controller. The Front Controller receives a HI beam turn ON signal from the Main Body ECU RH and activates the headlight solenoid built into the headlight unit to slide the shade down.
4. HID HEADLIGHT SYSTEM This system consists primarily of the Light Control Switch, Windshield Wiper SW Assembly, Main Body ECU RH, HEAD LP relay, discharge bulbs, and Light Control ECUs. The Main Body ECU RH controls the Low beam illumination using the HEAD LP relay. The BEAN network is used for communications. A HEAD backup link exists between the Windshield Wiper Switch and the Main Body ECU RH. The Light Control ECUs transform the voltage that is input from the battery to a high voltage of up to 20,000V and apply this voltage to the discharge bulbs in order to illuminate them. A fail-safe function is provided as a countermeasure against the high voltage that is generated in case that a problem occurs in the headlight system. NOTE: For safety reasons, do not attempt to measure the voltage output from a Light Control ECU.
5. AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM When the headlights are on, the automatic headlight beam level control system operates the headlight level actuators in accordance with movement of the vehicle. The automatic headlight beam level control system mainly consists of the AFS ECU, front height control sensor, rear height control sensor, and two headlight level actuators. The AFS ECU controls the system. The ECU detects the movement of the suspension from the front and rear height control sensors and the vehicle speed from the front RH and LH speed sensors. The ECU then controls the headlight level actuator based on this information, in order to change the headlight reflector angle. The AFS ECU controls both the level control system and the intelligent AFS system. Initial Set Control When the AFS ECU detects a vehicle speed of 1 km/h (0.6 mph) and the engine is running at 400 rpm, the ECU executes the initial setting of the stepper motors. Fail-Safe Function If the AFS ECU detects a malfunction in the automatic headlight beam level control system, the AFS ECU effects fail-safe control. At the same time, the AFS ECU flashes the AFS OFF indicator light in order to inform the driver of the problem.
6. INTELLIGENT AFS (ADAPTIVE FRONT-LIGHTING SYSTEM) An intelligent AFS (Adaptive Front-lighting System) is used in order to turn the LO/HI (discharge) Beam toward the inside of the cornering direction. The separate (incandescent) HI Beam illumination is not controlled by this system. Swivel Angle Range SWIVEL ANGLE RANGE REFERENCE Driving Condition Headlight Unit Left Right Right Turn 0° Fixed 0 to 5° to Right Left Turn 0 to 15° to Left 0° Fixed This system consists of the two headlight units for LO/HI Beam (discharge illumination), the AFS ECU, two headlight swivel actuators, steering angle sensor and front speed sensors. The AFS ECU controls this system. The AFS ECU also controls the automatic headlight beam level control system. The system does not control the incandescent HI beam illumination. The lights controlled by this system (LO/HI Beam) are shown in the Front Lighting illustration. The AFS ECU performs intelligent AFS control when all the following conditions are fulfilled. Engine is running. Vehicle is moving* forward at 6 mph (10 km/h) or more, or stopped. Steering angle* is 7.5° or more. Headlight LO/HI beam operates. Daytime running light system is not operating. AFS ON/ OFF condition is ON. *: Swivel angle change is accordance with the vehicle speed and steering angle. The minimum vehicle speed to change the swivel is 6 mph (10 km/h) if the steering angle is large. The minimum steering angle to change the swivel is 7.5° if the vehicle speed is high. The AFS ECU calculates the target lighting angle of the LO/HI beam based on the steering angle and the vehicle speed. Then, it actuates the headlight swivel actuators in order to attain the target lighting angle. The operation angle of the headlights is detected by the position (number of steps) of the stepper motor in the headlight swivel actuator.
7. DAYTIME RUNNING LIGHT SYSTEM A daytime running light system is designed to automatically illuminate the headlights (dimmed HI beams), during the daytime to make the car more visible to other vehicles. The Main Body ECU RH and Front Controller control this system. The Main Body ECU RH transmits a turn ON signal to the front controller, and the front controller illuminates the HI beams using a duty control. This system is enabled when the conditions given below are met: Power Source: IG-ON Engine Speed Signal Input (Engine Running Condition) Light Control Switch OFF, TAIL, or AUTO position (if headlight-on control is not being performed by the automatic light control.) Parking Brake Switch: OFF HINT: The lights that are controlled are shown in the Front Lighting and Rear Lighting illustrations.
8. ILLUMINATED ENTRY SYSTEM General The illuminated entry system has the seven control functions shown in the following chart: ILLUMINATED ENTRY SYSTEM Control Operation Outline Lights that Operate Actuation Area-linked Turn ON When the key enters any actuation area around the doors, the front and rear seat illumination turns on. Front Seat Illumination Rear Seat Illumination Door Mirror Foot Lights Transmitter-linked Turn ON When the following condition is satisfied, the lights that operate turn on. Any door is unlocked using the transmitter. Front Seat Illumination Rear Seat Illumination Footwell Lights (3) Door Mirror Foot Lights Door Open-linked Turn ON The lights that operate turn on when the following condition is present. Any door is opened. Engine Switch Illumination Front Interior Lights Rear Interior Light Scuff Plate Lights Door Courtesy Lights Footwell Lights (3) Door Close-linked Turn OFF (1) When the following condition is satisfied, the lights that operate turn off. All doors are closed. Front Seat Illumination Rear Seat Illumination Engine Switch Illumination Front Interior Lights Rear Interior Light Scuff Plate Lights Door Courtesy Lights Footwell Lights (3) Door Mirror Foot Lights Door Lock-linked Turn OFF (2) When the following condition is satisfied, the operation lights turn OFF. All doors are locked Power Source-linked Turn ON When the following condition is satisfied, the shift illumination turns on. Power source is changed from OFF to ACC or IG-ON. Shift Illumination Turn OFF (2) When the following condition is satisfied, the lights that operate turn off. Power source is changed from OFF to ACC or IG-ON. Front Seat Illumination Rear Seat Illumination Engine Switch Illumination Door Courtesy Lights Footwell Lights (3) Door Mirror Foot Lights Battery Saving Turn OFF When the following two conditions have been met, these lights turn off. A key is not in the actuation area. There are no changes in the condition of the doors for 20 minutes. Front Seat Illumination Rear Seat Illumination Engine Switch Illumination Front Interior Lights Rear Interior Light Scuff Plate Lights Door Courtesy Lights Footwell Lights (3) (1) Illuminates for approximately 15 seconds, fades out (fades out over three seconds). (2) Stops the illumination, starts to fade out immediately (fades out over three seconds). (3) The footwell lights go off when the light control rheostat is adjusted to the minimum level.
9. TURN SIGNALS The turn signals are front, rear and side lights that can be used to indicate a change of vehicle direction. The Turn Signal Switch signals are received by the Windshield Wiper Switch Assembly (Combination switch ECU). The Main Body ECU LH operates the Turn Signal Flasher. The Turn Signal Flasher operates the Signal Lights. HINT: The lights that are controlled are shown in the Front Lighting and Rear Lighting illustrations.
10. HEADLIGHT CLEANER SYSTEM Some vehicles are provided with a headlight cleaner system. More details on the headlight cleaner system operation can be found in the wiper information.

DESCRIPTION

This DTC is output when a failure of the automatic light control sensor circuit is detected.

DTC DETECTION CONDITION

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1. CHECK AUTOMATIC LIGHT CONTROL SENSOR (OPERATION) Connect the intelligent tester to the DLC3. Turn the engine switch on (IG). Turn the intelligent tester main switch on. Select the "DATA LIST" on the intelligent tester. DATA LIST: MAIN BODY (Main Body ECU RH) DATA LIST: MAIN BODY (Main Body ECU RH) Item Measurement Item / Display (Range) Normal Condition ILLUMINATE RATE Illumination information / 0 to 99.99 ms. 8 to 22 ms. The value of the illumination rate should change in the following range when light contacts the automatic light control sensor or when the automatic light control sensor is covered. OK: 8 to 22 ms. HINT: This is the time taken for the automatic light control sensor to generate one cycle of frequency according to the brightness. OK : REPLACE MAIN BODY ECU RH (COWL SIDE J/B RH) NG: Go To Next Step
2. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU RH - AUTOMATIC LIGHT CONTROL SENSOR) Disconnect the J74 main body ECU RH connector. Disconnect the K1 automatic light control sensor connector. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition J74-6 (CLTB) - K1-6 (CLTB) Always Below 1 ohms J74-5 (CLTS) - K1-5 (CLTS) Always Below 1 ohms J74-4 (CLTE) - K1-3 (CLTE) Always Below 1 ohms J74-6 (CLTB) - Body ground Always 10 kohms or higher J74-5 (CLTS) - Body ground Always 10 kohms or higher J74-4 (CLTE) - Body ground Always 10 kohms or higher Connect the 2 connectors. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go To Next Step
3. CHECK AUTOMATIC LIGHT CONTROL SENSOR Disconnect the automatic light control sensor. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition K1-3 (CLTE) - Body ground Always Below 1 ohms Connect the voltmeter's positive (+) lead to terminal 6 and the negative (-) lead to terminal 3. Measure the voltage according to the value(s) in the table below. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition K1-3 (CLTE) - K1-6 (CLTB) Engine switch on (IG) 10 to 14 V Connect the K1 automatic light control sensor connector. Connect the oscilloscope and check the waveform according the table below. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition Tester Range K1-3 (CLTE) - K1- 5 (CLTS) Engine switch on (IG), Headlight dimmer switch in AUTO Correct waveform is as shown 5 V Division, 5 msec/Division If the ambient light becomes brighter, width A becomes narrower. NG : REPLACE AUTOMATIC LIGHT CONTROL SENSOR OK : REPLACE MAIN BODY ECU RH (COWL SIDE J/B RH)

The swivel actuator receives the signal from the AFS ECU to operate and sends the signal regarding the direction of the headlight and condition of the headlight swivel motor to the AFS ECU.

DTC DETECTION CONDITION

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1. PERFORM ACTIVE TEST BY INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the engine switch on (IG). Turn the intelligent tester main switch on. Select the "ACTIVE TEST" on the intelligent tester. Check swivel motor operates with the intelligent tester. ACTIVE TEST: AFS ECU ACTIVE TEST: AFS ECU REFERENCE Item Test Details Diagnostic Note SWIVEL MTR (RH) Drive the swivel motor RIGHT / OFF - SWIVEL MTR (LH) Drive the swivel motor LEFT / OFF - OK: Swivel motor operates. Result RESULT REFERENCE Result Proceed to OK (When checking from PROBLEM SYMPTOMS TABLE) A OK (When checking from DIAGNOSTIC TROUBLE CODE CHART) B NG C B : REPLACE AFS ECU C : Go to step 2 A : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
2. INSPECT HEADLIGHT ASSEMBLY Disconnect the B12 and B2 headlight assembly connectors. Measure the resistance according to the value(s) in the table below. Standard resistance: LH Side (B2412) SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition B12-23 (BL1-) - B12-24 (BL1+) Always 6 to 8 ohms B12-21 (BL2-) - B12-22 (BL2+) Always 6 to 8 ohms RH Side (B2413) SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition B2-23 (BL1-) - B2-24 (BL1+) Always 6 to 8 ohms B2-22 (BL2-) - B2-21 (BL2+) Always 6 to 8 ohms HINT: Measure the resistance after the headlight has cooled. NG : REPLACE HEADLIGHT ASSEMBLY OK: Go To Next Step
3. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY - AFS ECU) Disconnect the A28 AFS ECU connector. Disconnect the B12 and B2 headlight connectors. Measure the resistance according to the value(s) in the table below. Standard resistance: SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition A28-25 (BL1+) - B12-24 (BL1+) Always Below 1 ohms A28-26 (BL1-) - B12-23 (BL1-) Always Below 1 ohms A28-27 (BL2+)- B12-22 (BL2+) Always Below 1 ohms A28-28 (BL2-) - B12-21 (BL2-) Always Below 1 ohms A28-19 (SMGL) - B12-19 (SMGL) Always Below 1 ohms A28-24 (SML) - B12-18 (SML) Always Below 1 ohms A28-22 (SMBL) - B12-20 (SMBL) Always Below 1 ohms A28-29 (LL1+) - B12-15 (LL1+) Always Below 1 ohms A28-30 (LL1-) - B12-14 (LL1-) Always Below 1 ohms A28-31 (LL2+) - B12-13 (LL2+) Always Below 1 ohms A28-32 (LL2-) - B12-12 (LL2-) Always Below 1 ohms A28-25 (BL1+)- Body ground Always 10 kohms or higher A28-26 (BL1-) - Body ground Always 10 kohms or higher A28-27 (BL2+) - Body ground Always 10 kohms or higher A28-28 (BL2-) - Body ground Always 10 kohms or higher A28-19 (SMGL) - Body ground Always 10 kohms or higher A28-24 (SML) - Body ground Always 10 kohms or higher A28-22 (SMBL) - Body ground Always 10 kohms or higher A28-29 (LL1+) - Body ground Always 10 kohms or higher A28-30 (LL1-) - Body ground Always 10 kohms or higher A28-31 (LL2+) - Body ground Always 10 kohms or higher A28-32 (LL2-) - Body ground Always 10 kohms or higher RH Side (B2413) SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition A28-9 (BR1+) - B2-24 (BR1+) Always Below 1 ohms A28-10 (BR1-) - B2-23 (BR1-) Always Below 1 ohms A28-11 (BR2+) - B2-22 (BR2+) Always Below 1 ohms A28-12 (BR2-) - B2-21 (BR2+) Always Below 1 ohms A28-18 (SMGR) - B2-19 (SMGR) Always Below 1 ohms A28-21 (SMBR) - B2-20 (SMR) Always Below 1 ohms A28-23 (SMR) - B2-18 (SMBR) Always Below 1 ohms A28-13 (LR1+) - B2-15 (LR1+) Always Below 1 ohms A28-14 (LR1-) - B2-14 (LR1-) Always Below 1 ohms A28-15 (LR2+) - B2-13 (LR2+) Always Below 1 ohms A28-16 (LR2-) - B2-12 (LR2-) Always Below 1 ohms A28-9 (BR1+) - Body ground Always 10 kohms or higher A28-10 (BR1-) - Body ground Always 10 kohms or higher A28-11 (BR2+) - Body ground Always 10 kohms or higher A28-12 (BR2-) - Body ground Always 10 kohms or higher A28-18 (SMGR) - Body ground Always 10 kohms or higher A28-21 (SMBR) - Body ground Always 10 kohms or higher A28-23 (SMR) - Body ground Always 10 kohms or higher A28-13 (LR1+) - Body ground Always 10 kohms or higher A28-14 (LR1-)- Body ground Always 10 kohms or higher A28-15 (LR2+) - Body ground Always 10 kohms or higher A28-16 (LR2-) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go To Next Step
4. CHECK AFS ECU Disconnect the B12 and B2 headlight connectors. Measure the voltage according to the value(s) in the table below. Standard voltage: LH Side (B2412) SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition B12-20 (SMBL) - B12-19 (SMGL) Engine switch off Below 1 V Engine switch on (IG) 4.5 to 5.5 V RH Side (B2413) SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition B2-20 (SMBR) - B2-19 (SMGR) Engine switch off Below 1 V Engine switch on (IG) 4.5 to 5.5 V NG : REPLACE AFS ECU OK: Go To Next Step
5. REPLACE HEADLIGHT ASSEMBLY Temporarily replace the headlight assembly with a new or normally functioning one. Check that headlight assembly operates. OK: Return to normal operation. NG : REPLACE AFS ECU OK : END

The AFS ECU receives signals regarding the swerve-angle from the steering angle sensor in the steering wheel.

DTC DETECTION CONDITION

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1. CHECK DTC (BRAKE CONTROL SYSTEM) Check that no DTC for steering sensor trouble code (Brake Control System) is output. Result RESULT REFERENCE Result Proceed to DTC (C1231/31) is not output A DTC (C1231/31) is output B with VDIM: (See «DTC C1203/59 ECM COMMUNICATION CIRCUIT MALFUNCTION; DTC C1270/88 INITIALIZATION INCOMPLETE (TEST MODE DTC)»(ref-235467-S06160827512006062200000) ) without VDIM: (See «DTC C1203/53 ECM Communication Circuit Malfunction»(ref-235572-S15475477252006062400000) ) B : REPAIR CIRCUITS INDICATED BY OUTPUT DTCS (BRAKE CONTROL SYSTEM) A: Go To Next Step
2. READ VALUE OF INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the engine switch on (IG). Turn the intelligent tester main switch on. Select the items below in the DATA LIST, and read the displays on the intelligent tester. DATA LIST: AFS ECU DATA LIST: AFS ECU Item Measurement Item / Display (Range) Normal Condition Diagnostic Note STEER SENS SIG Steering angle sensor signal value / -384°to 382.5° Approx. 0° (When steering wheel is straight) - OK: Condition sign can be displayed. Result RESULT REFERENCE Result Proceed to OK (When checking from PROBLEM SYMPTOMS TABLE) A OK (When checking from DIAGNOSTIC TROUBLE CODE CHART) C NG C B : REPLACE AFS ECU C : Go to step 3 A : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
3. CHECK HARNESS AND CONNECTOR (STEERING ANGLE SENSOR - AFS ECU) Disconnect the J23 steering angle sensor connector. Disconnect the A27 AFS ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition J23-7 (SS1-) - A27-8 (SS-) Always Below 1 ohms J23-8 (SS1+) - A27-7 (SS+) Always Below 1 ohms A27-8 (SS1-) - Body ground Always 10 kohms or higher A27-7 (SS1+) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go To Next Step
4. CHECK AFS ECU Reconnect the A27 AFS ECU connector. Measure the voltage of the connector. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition A27-7 (SS+) - A27-8 (SS-) Engine switch on (IG) Approx. 5 V OK : REPLACE STEERING ANGLE SENSOR NG : REPLACE AFS ECU

The AFS ECU receives signals regarding the front wheel speed from the skid control ECU.

DTC DETECTION CONDITION

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With VDIM model

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1. CHECK VEHICLE CONDITION Check vehicle condition. Result RESULT REFERENCE Result Proceed to Without VDIM A With VDIM B B : Go to step 5 A: Go To Next Step
2. CHECK DTC (VEHICLE STABILITY CONTROL SYSTEM) Check that no DTC for vehicle stability control system (See «VEHICLE STABILITY CONTROL SYSTEM (W/ VDIM)»(ref-235467-S38294942822006062200000) ). Result RESULT REFERENCE Result Proceed to DTC is not output A DTC is output B B : REPAIR CIRCUITS INDICATED BY OUTPUT DTCS A: Go To Next Step
3. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU WITH ACTUATOR - AFS ECU) Disconnect the A14 skid control ECU with actuator connector. Disconnect the A28 AFS ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition A14-37 (FRO) - A28-7 (SPDR) Always Below 1 ohms A14-38 (FLO) - A28-6 (SPDL) Always Below 1 ohms A28-7 (SPDR) - Body ground Always 10 kohms or higher A28-6 (SPDL) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go To Next Step
4. CHECK AFS ECU Disconnect the A28 AFS ECU connector. Measure the voltage of the connector. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Voltage A28-6 (SPDL) - Body ground Vehicle is driving at approx. 30 km/h (19 mph) 0 to 5 V Pulse generation (see waveform 1) A28-7 (SPDR) - Body ground Vehicle is driving at approx. 30 km/h (19 mph) 0 to 5 V Pulse generation (see waveform 1) Waveform 1: Oscilloscope wave ITEM CONTENT Item Contents Tool setting 2 V/DIV., 2 ms./ DIV. Vehicle condition Vehicle is driving at approximately 30 km/h (19 mph) OK: Waveform is output as shown in the illustration. Result RESULT REFERENCE Result Proceed to OK (When checking from DIAGNOSTICS TROUBLE CODE CHART) A OK (When checking from PROBLEM SYMPTOMS TABLE) B NG C B : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C : REPLACE BRAKE ACTUATOR ASSEMBLY A : REPLACE AFS ECU
5. CHECK DTC (VEHICLE STABILITY CONTROL SYSTEM) Check that no DTC for vehicle stability control system (See «VEHICLE STABILITY CONTROL SYSTEM (w/o VDIM)»(ref-235572-S04426140472006062400000) ). Result RESULT REFERENCE Result Proceed to DTC is not output A DTC is output B B : REPAIR CIRCUITS INDICATED BY OUTPUT DTCS A : Go To Next Step
6. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - AFS ECU) Disconnect the A28 AFS ECU connector. Disconnect the A35 skid control ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition A35-5 (FRO) - A28-7 (SPDR) Always Below 1 ohms A35-4 (FLO) - A28-6 (SPDL) Always Below 1 ohms A28-7 (SPDR) - Body ground Always 10 kohms or higher A28-6 (SPDL) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go To Next Step
7. CHECK AFS ECU Disconnect the A28 AFS ECU connector. Measure the voltage of the connector. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition A28-6 (SPDL) - Body ground Vehicle is driving at approx. 30 km/h (19 mph) 0 to 5 V Pulse generation (see waveform 1) A28-7 (SPDR) - Body ground Vehicle is driving at approx. 30 km/h (19 mph) 0 to 5 V Pulse generation (see waveform 1) Waveform 1: Oscilloscope wave ITEM CONTENT Item Contents Tool setting 2 V/DIV., 2 ms./DIV. Vehicle condition Vehicle is driving at approximately 30 km/h (19 mph) OK: Waveform is output as shown in the illustration. Result RESULT REFERENCE Result Proceed to OK (When checking from DIAGNOSTICS TROUBLE CODE CHART) A OK (When checking from PROBLEM SYMPTOMS TABLE) B NG C B : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C : REPLACE SKID CONTROL ECU ASSEMBLY A : REPLACE AFS ECU

The AFS ECU receives signals regarding the height of the front/rear of the vehicle from the height control sensor.

DTC DETECTION CONDITION

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1. READ VALUE OF INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the engine switch on (IG). Turn the intelligent tester main switch on. Select the "DATA LIST" on the intelligent tester, and read the displays on the intelligent tester. DATA LIST: AFS ECU DATA LIST: AFS ECU REFERENCE Item Measurement Item / Display (Range) Normal Condition Diagnostic Note FR HEIGHT SENS Front height sensor signal value / 0 to 5 V Approx. 2.5 V - RR HEIGHT SENS Rear height sensor signal value / 0 to 5 V Approx. 2.5 V - OK: Condition sign can be displayed. Result RESULT REFERENCE Result Proceed to OK (When checking from PROBLEM SYMPTOMS TABLE) A OK (When checking from DIAGNOSTIC TROUBLE CODE CHART) B NG C B : REPLACE AFS ECU C : Go to step 2 A : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
2. CHECK HARNESS AND CONNECTOR (FRONT HEIGHT CONTROL SENSOR CIRCUIT) Disconnect the A17 front height control sensor connector. Measure the voltage according to the value(s) in the table below. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition A17-1 (SHG) - A17-3 (SHB) Engine switch on (IG) 4.5 to 5.5 V NG : Go to step 8 OK : Go To Next Step
3. CHECK HARNESS AND CONNECTOR (REAR HEIGHT CONTROL SENSOR CIRCUIT) Disconnect the Y2 rear height control sensor connector. Measure the voltage according to the value(s) in the table below. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition Y2-1 (SHG) - Y2-3 (SHB) Engine switch on (IG) 4.5 to 5.5 V NG : Go to step 9 OK: Go To Next Step
4. CHECK HARNESS AND CONNECTOR (AFS ECU - FRONT HEIGHT CONTROL SENSOR) Disconnect the A28 AFS ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition A28-2 (SHFL) - A17-2 (SHFL) Always Below 1 ohms A28-2 (SHFL) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go To Next Step
5. CHECK HARNESS AND CONNECTOR (AFS ECU - REAR HEIGHT CONTROL SENSOR) Disconnect the Y2 sensor connector. Disconnect the A27 AFS ECU connector. Measure the resistance of the wire harness side connectors. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition A27-9 (SHRL) - Y2-2 (SHRL) Always Below 1 ohms A27-9 (SHRL) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go To Next Step
6. INSPECT HEIGHT CONTROL SENSOR (FRONT HEIGHT CONTROL SENSOR) Connect the 3 dry cell batteries (1.5 V) in series. Remove the height control sensor assembly front. Connect the positive (+) lead from the battery to terminal 3 and the negative (-) lead from the battery to terminal 1. Measure the voltage between terminals 2 and 1 while slowly moving the link up and down. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition A17-2 (SHFL) - A17-1 (SHG) +45° Approx. 4.5 V A17-2 (SHFL) - A17-1 (SHG) 0° (Normal) Approx. 2.5 V A17-2 (SHFL) - A17-1 (SHG) -45° (Low) Approx. 0.5 V NG : REPLACE HEIGHT CONTROL SENSOR (FRONT HEIGHT CONTROL SENSOR) OK: Go To Next Step
7. INSPECT HEIGHT CONTROL SENSOR (REAR HEIGHT CONTROL SENSOR) Connect the 3 dry cell batteries (1.5 V) in series. Remove the height control sensor assembly rear. Connect the positive (+) lead from the battery to terminal 3 and the negative (-) lead from the battery to terminal 1. Measure the voltage between terminals 2 and 1 while slowly moving the link up and down. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition Y2-2 (SHRL) - Y2-1 (SHG) +45° Approx. 4.5 V Y2-2 (SHRL) - Y2-1 (SHG) 0° (Normal) Approx. 2.5 V Y2-2 (SHRL) - Y2-1 (SHG) -45° (Low) Approx. 0.5 V NG : REPLACE HEIGHT CONTROL SENSOR (REAR HEIGHT CONTROL SENSOR) OK : REPLACE AFS ECU
8. CHECK HARNESS AND CONNECTOR (AFS ECU - FRONT HEIGHT CONTROL SENSOR) Disconnect the A17 front height control sensor connector. Disconnect the A28 AFS ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition A28-1 (SBF) - A17-3 (SHB) Always Below 1 ohms A28-2 (SHFL) - A17-2 (SHFL) Always Below 1 ohms A28-17 (SGF) - A17-1 (SHG) Always Below 1 ohms A28-1 (SBF) - Body ground Always 10 kohms or higher A28-2 (SHFL) - Body ground Always 10 kohms or higher A28-17 (SGF) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR (AFS ECU - FRONT HEIGHT CONTROL SENSOR) OK : REPLACE AFS ECU
9. CHECK HARNESS AND CONNECTOR (AFS ECU - REAR HEIGHT CONTROL SENSOR) Disconnect the Y2 sensor connector. Disconnect the A27 AFS ECU connector. Measure the resistance of the wire harness side connectors. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition A27-10 (SBR) - Y2-3 (SHB) Always Below 1 ohms A27-9 (SHRL) - Y2-2 (SHFL) Always Below 1 ohms A27-20 (SGR) - Y2-1 (SHRL) Always Below 1 ohms A27-10 (SBR) - Body ground Always 10 kohms or higher A27-9 (SHRL) - Body ground Always 10 kohms or higher A27-20 (SGR) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR (AFS ECU - REAR HEIGHT CONTROL SENSOR) OK : REPLACE AFS ECU

The leveling actuator (headlight leveling motor) receives the signal from the AFS ECU to operate. The AFS ECU receives signals regarding the operating conditions of the leveling actuator (headlight leveling motor).

DTC DETECTION CONDITION

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1. PERFORM ACTIVE TEST BY INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the engine switch on (IG). Turn the intelligent tester main switch on. Select the "ACTIVE TEST" on the intelligent tester. Check the headlight leveling motor operation with the intelligent tester. ACTIVE TEST: AFS ECU ACTIVE TEST: AFS ECU REFERENCE Item Test Details Diagnostic Note LEVELING MTR Drive the leveling motor UP / OFF (OFF) - LEVELING MTR Drive the leveling motor DOWN / OFF (OFF) - OK: Headlight leveling motor is operated. Result RESULT REFERENCE Result Proceed to OK (When checking from PROBLEM SYMPTOMS TABLE) A OK (When checking from DIAGNOSTIC TROUBLE CODE CHART) B NG C B : REPLACE AFS ECU C : Go to step 2 A : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
2. CHECK HARNESS AND CONNECTOR (HEADLIGHT LEVELING MOTOR - AFS ECU) Disconnect the B12 and B2 headlight assembly connectors. Disconnect the A28 AFS ECU connector. Measure the resistance according to the value (s) in the table below. Standard resistance: LH Side (B2417) SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition A28-29 (LL1+) - B12-15 (LL1+) Always Below 1 ohms A28-30 (LL1-) - B12-14 (LL1-) Always Below 1 ohms A28-31 (LL2+) - B12-13 (LL2+) Always Below 1 ohms A28-32 (LL2-) - B12-12 (LL2-) Always Below 1 ohms A28-29 (LL1+) - Body ground Always 10 kohms or higher A28-30 (LL1-) - Body ground Always 10 kohms or higher A28-31 (LL2+) - Body ground Always 10 kohms or higher A28-32 (LL2-) - Body ground Always 10 kohms or higher RH Side (B2418) SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition Tester Connection Condition Specified Condition A28-13 (LR1+) - B2-15 (LR1+) Always Below 1 ohms A28-14 (LR1-) - B2-14 (LR1-) Always Below 1 ohms A28-15 (LR2+) - B2-13 (LR2+) Always Below 1 ohms A28-16 (LR2-) - B2-12 (LR2-) Always Below 1 ohms A28-13 (LR1+) - Body ground Always 10 kohms or higher A28-14 (LR1-) - Body ground Always 10 kohms or higher A28-15 (LR2+) - Body ground Always 10 kohms or higher A28-16 (LR2-) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go To Next Step
3. CHECK HARNESS AND CONNECTOR (HEADLIGHT LEVELING MOTOR - HEADLIGHT ASSEMBLY) Disconnect the headlight leveling motor connector. Measure the resistance according to the value(s) in the table below. Standard resistance: LH Side SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition B12-15 (LL1+) - 3 Always Below 1 ohms B12-14 (LL1-) - 4 Always Below 1 ohms B12-13 (LL2+) - 1 Always Below 1 ohms B12-12 (LL2-) - 2 Always Below 1 ohms B12-15 (LL1+) - Body ground Always 10 kohms or higher B12-14 (LL1-) - Body ground Always 10 kohms or higher B12-13 (LL2+) - Body ground Always 10 kohms or higher B12-12 (LL2-) - Body ground Always 10 kohms or higher RH Side SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition B2-15 (LR1+) - 3 Always Below 1 ohms B2-14 (LR1-) - 4 Always Below 1 ohms B2-13 (LR2+) - 1 Always Below 1 ohms B2-12 (LR2-) - 2 Always Below 1 ohms B2-15 (LR1+) - Body ground Always 10 kohms or higher B2-14 (LR1-) - Body ground Always 10 kohms or higher B2-13 (LR2+) - Body ground Always 10 kohms or higher B2-12 (LR2-) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go To Next Step
4. INSPECT HEADLIGHT LEVELING MOTOR (LH AND/OR RH) Measure the resistance according to the value(s) in the table below. Standard resistance: RH Side (B2418) SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition 1 - 2 Always 5.8 to 12.5 ohms 3 - 4 Always 5.8 to 12.5 ohms LH Side (B2417) SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition 1 - 2 Always 5.8 to 12.5 ohms 3 - 4 Always 5.8 to 12.5 ohms NG : REPLACE HEADLIGHT ASSEMBLY LH OR HEADLIGHT ASSEMBLY RH OK : REPLACE AFS ECU

The AFS ECU receives signals regarding the lighting condition of the headlight, shift position of the transmission, engine condition from the generator and vehicle speed from the combination meter using multiplex communication.

When the DTC (B2419) is output, the other DTCs are output at the same time.

DTC DETECTION CONDITION

1. CHECK MULTIPLEX COMMUNICATION SYSTEM Use the intelligent tester to check if the Multiplex Communication System (MPX) is functioning normally (See «MULTIPLEX COMMUNICATION SYSTEM»(ref-235578-S20958542052006062400000) ). Result RESULT REFERENCE Result Proceed to MPX DTC is not output A MPX DTC is output B B : GO TO «MULTIPLEX COMMUNICATION SYSTEM»(ref-235578-S20958542052006062400000) A : REPLACE AFS ECU

When the AFS ECU detects a malfunction in itself, a DTC is output.

DTC DETECTION CONDITION

1. REPLACE AFS ECU END

When the vehicle speed sensor is malfunctioning, the AFS ECU receives a vehicle speed sensor error signal from the skid control ECU.

DTC DETECTION CONDITION

1. CHECK BRAKE CONTROL SYSTEM NG : REPAIR OR REPLACE BRAKE CONTROL SYSTEM OK : REPLACE AFS ECU

The headlight relay is turned ON by operating the headlight switch.

When the theft deterrent system is activated, it causes the ECU to turn the headlight relay on and off repeatedly at approximately 0.25 second intervals to flash the headlights.

In this condition, if any of the following operations is performed, the ECU to turns the headlight relay off to stop the headlight from flashing

1. Unlock the driver door with a key.
2. Turn the engine switch on (ACC) or on (IG).
3. Unlock the doors with the wireless door lock control system.

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1. PERFORM ACTIVE TEST BY INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the engine switch on (IG). Turn the intelligent tester main switch on. Select the item below in the ACTIVE TEST and then check the relay operation. ACTIVE TEST: MAIN BODY (Main Body ECU RH) ACTIVE TEST: MAIN BODY (Main Body ECU RH) REFERENCE Item Test Details Diagnostic Note HEAD LIGHT Headlight relay ON / OFF - OK: Headlight assembly (low) illuminates. OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE NG: Go To Next Step
2. INSPECT FUSE (H-LP L LWR, H-LP R LWR) Remove the H-LP L LWR fuse from the engine room No. 2 relay block. Remove the H-LP R LWR fuse from the engine room No. 2 relay block. Measure the resistance of the fuses. Standard resistance: Below 1 ohms NG : REPLACE FUSE OK: Go To Next Step
3. INSPECT HEAD LP RELAY Remove the HEAD LP relay from the engine room No. 1 relay block. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Specified Condition 3 - 5 10 kohms or higher 3 - 5 Below 1 ohms (When battery voltage is applied to terminals 1 and 2) NG : REPLACE HEAD LP RELAY OK: Go To Next Step
4. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU RH - BATTERY) Disconnect the RL main body ECU RH connector. Measure the voltage according to the value(s) in the table below. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition RL-7 (HRLY) - Body ground Always 10 to 14 V NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go To Next Step
5. CHECK HARNESS AND CONNECTOR (HEADLIGHT (LOW LH OR LOW RH) - BATTERY AND BODY GROUND) Check the wire harness between the headlight (Low LH) and battery, and the headlight (Low LH) and body ground. Disconnect the B12 headlight connector. Measure the voltage and resistance according to the value(s) in the table below. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition B12-17 (LO) - Body ground Turn the light control switch to the ON (HEAD) position. 10 to 14 V Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition B12-16 (E) - Body ground Always Below 1 ohms Check the wire harness between the headlight (Low RH) and battery, and the headlight (Low RH) and body ground. Disconnect the B2 headlight connector. Measure the voltage and resistance according to the value(s) in the table below. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition B2-17 (LO) - Body ground Turn the light control switch to the ON (HEAD) position. 10 to 14 V Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition B2-16 (E) - Body ground Always Below 1 ohms OK : REPLACE HEADLIGHT ASSEMBLY (LOW LH OR LOW RH) NG: Go To Next Step
6. CHECK HARNESS AND CONNECTOR (HEADLIGHT (LOW LH OR LOW RH) - HEAD LP RELAY) Check the harness and the connectors between the headlight (Low LH or Low RH) and the HEAD LP relay. Disconnect the B12 light connector. Remove the HEAD LP relay from the engine room No. 1 relay block. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) SPECIFIED CONDITION AND TESTER CONNECTION Headlight Assembly Tester Connection Specified Condition LH B12-17 (LO) - HEAD LP relay terminal (3) Below 1 ohms RH B2-17 (LO) - HEAD LP relay terminal (3) Below 1 ohms Standard resistance (Check for short) SPECIFIED CONDITION AND TESTER CONNECTION Headlight Assembly Tester Connection Specified Condition LH B12-17 (LO) or HEAD LP relay terminal (3) - Body ground 10 kohmsor higher RH B2-17 (LO) or HEAD LP relay terminal (3) - Body ground 10 kohmsor higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE MAIN BODY ECU RH (COWL SIDE J/B RH)

This Bi- function is activated by the Front Controller. The Front Controller receives a HI beam turn ON signal from the main body ECU RH and activates the headlight solenoid built into the headlight unit to slide the shade down.

When the LO beam headlight is switched on, the upper illumination area of the discharge bulb is blocked by the shade and only the lower illumination area is used. When the HI beam is turned on, the headlight solenoid slides the shutter down to allow use of the upper illumination area, thus increasing the illumination area and improving visibility when the HI beam is on.

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1. PERFORM ACTIVE TEST BY INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the engine switch on (IG). Turn the intelligent tester main switch on. Select the item(s) in the ACTIVE TEST, and check the operation. ACTIVE TEST: BODY No.5 (Front Controller) ACTIVE TEST: BODY NO.5 (FRONT CONTROLLER) REFERENCE Item Test Details Diagnostic Note HEAD LIGHT (HI) Headlight (high) operation ON / OFF - OK: Headlight (HI) comes on. NG : Go to step 2 OK : REPLACE HEADLIGHT ASSEMBLY
2. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY - FRONT CONTROLLER) Disconnect the B2 or B12 headlight assembly connector. Turn the light control switch to the ON (HEAD) position. Measure the voltage according to the value(s) in the table. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition B2-4 (B) - Body ground Light control switch to the ON (HEAD) position 10 to 14 V B12-4 (B) - Body ground Light control switch to the ON (HEAD) position 10 to 14 V NG : Go to step 4 OK: Go To Next Step
3. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY - BODY GROUND) Disconnect the B2 or B12 headlight assembly connector. Measure the resistance according to the value(s) in the table. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition B2-3 (E) - Body ground Always Below 1 ohms B12-3 (E) - Body ground Always Below 1 ohms NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE HEADLIGHT ASSEMBLY
4. CHECK HARNESS AND CONNECTOR (FRONT CONTROLLER - HEADLIGHT ASSEMBLY) Disconnect the G2 engine room J/B No. 2 connector. Disconnect the B2 or B12 headlight assembly connector. Measure the resistance according to the value(s) in the table. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition 2G-4 - B2-4 (B) Always Below 1 ohms 2G-4 - B12-4 (B) Always Below 1 ohms 2G-4 or B2-4 (B) - Body ground Always 10 kohms or higher 2G-4 or B12-4 (B) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE ENGINE ROOM NO. 2 R/B (FRONT CONTROLLER)

The front controller receives headlight HI switch information from the combination switch, and turns on the headlights.

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1. PERFORM ACTIVE TEST BY INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the engine switch on (IG). Turn the intelligent tester main switch on. Select the item below in the ACTIVE TEST and then check the headlight operation. ACTIVE TEST: BODY No. 5 (Front Controller) ACTIVE TEST: BODY NO. 5 (FRONT CONTROLLER) REFERENCE Item Test Details Diagnostic Note HEAD LIGHT (HI) Headlight (High) ON / OFF - NG : Go to step 2 OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
2. INSPECT FUSE (H-LP UPR) Remove the H-LP UPR fuse from the engine room No. 2 relay block. Measure the resistance of the fuses. Standard resistance: Below 1 ohms NG : REPLACE FUSE OK: Go To Next Step
3. CHECK HARNESS AND CONNECTOR (ENGINE ROOM NO. 2 RELAY BLOCK - BATTERY) Disconnect the 2E relay block connector. Measure the voltage according to the value(s) in the table below. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition 2E-2 - Body ground Always 10 to 14 V NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go To Next Step
4. CHECK HARNESS AND CONNECTOR (ENGINE ROOM NO. 2 RELAY BLOCK - BODY GROUND) Check the wire harness between the headlight (LH) and engine room No. 2 relay block, and headlight (LH) and body ground. Disconnect the 2G relay block connector. Disconnect the B12 headlight (LH) connector. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition 2G-13 - B12-2 (HI) Always Below 1 ohms 2G-13 or B12-2 (HI) - Body ground Always 10 kohms or higher B12-1 (E) - Body ground Always Below 1 ohms Check the wire harness between the headlight (RH) and engine room No. 2 relay block, and headlight (RH) and body ground. Disconnect the 2G relay block connector. Disconnect the B2 headlight (RH) connector. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition 2G-12 - B2-2 (HI) Always Below 1 ohms 2G-12 or B2-2 (HI) - Body ground Always 10 kohms or higher B2-1 (E) - Body ground Always Below 1 ohms NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE ENGINE ROOM NO. 2 R/B (FRONT CONTROLLER)

The front controller receives fog light switch information from the combination switch, and turns on the fog light.

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1. PERFORM ACTIVE TEST BY INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the engine switch on (IG). Turn the intelligent tester main switch on. Select the item below in the ACTIVE TEST and then check the front fog light operation. ACTIVE TEST: BODY No. 5 (Front Controller) ACTIVE TEST: BODY NO. 5 (FRONT CONTROLLER) REFERENCE Item Test Details Diagnostic Note F FOG LIGHT RLY Front fog light relay ON / OFF - OK: Fog light illuminates. NG : Go to step 2 OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
2. INSPECT FUSE (FR FOG) Remove the FR FOG fuse from the engine room No. 2 relay block. Measure the resistance of the fuses. Standard resistance: Below 1 ohms NG : REPLACE FUSE OK: Go To Next Step
3. CHECK HARNESS AND CONNECTOR (ENGINE ROOM NO. 2 RELAY BLOCK - BATTERY) Disconnect the 2E relay block connector. Measure the voltage according to the value(s) in the table below. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition 2E-1 - Body ground Always 10 to 14 V NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go To Next Step
4. CHECK HARNESS AND CONNECTOR (ENGINE ROOM NO. 2 R/B - FOG LIGHT) Check the wire harness between the fog light (front LH) and engine room No. 2 relay block, and the fog light (front LH) and body ground. Disconnect the 2G relay block connector. Disconnect the B13 fog light connector. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition 2G-7 - B13-2 (HI) Always Below 1 ohms 2G-7 or B13-2 (HI) - Body ground Always 10 kohms or higher B13-1 (E) - Body ground Always Below 1 ohms Check the wire harness between the fog light (front RH) and engine room No. 2 relay block, and the fog light (front RH) and body ground. Disconnect the 2G relay block connector. Disconnect the B1 fog light connector. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition 2G-6 - B1-2 (HI) Always Below 1 ohms 2G-6 or B1-2 (HI) - Body ground Always 10 kohms or higher B1-1 (E) - Body ground Always Below 1 ohms NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE ENGINE ROOM NO. 2 R/B (FRONT CONTROLLER)

The main body ECU LH controls the operation of the turn signal flasher. The turn signal flasher blinks the turn signal lights.

The main body ECU LH receives RH/LH turn signal light blink request signals from the combination switch ECU through BEAN communication and sends operation signals to the turn signal flasher.

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1. CHECK TURN SIGNAL LIGHT (OPERATION) Turn the engine switch on (IG). When the turn signal light switch is operated, check that the corresponding turn signal lights flash. HINT: The front and rear turn signal lights share the same drive circuit. Therefore, if either the front or rear turn signal lights do not come on, there may be a problem in the circuit between the turn signal flasher and the bulb, or the circuit between the bulb and body ground. Result RESULT REFERENCE Result Proceed to Neither left nor right turn signal lights flash A Left turn signal lights do not flash B Right turn signal lights do not flash C B : Go to step 6 C : Go to step 11 A : Go To Next Step
2. PERFORM ACTIVE TEST BY INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the engine switch on (IG). Turn the intelligent tester on. Select the item(s) in the ACTIVE TEST, and check the operation. ACTIVE TEST: BODY No. 3 (Main body ECU LH) ACTIVE TEST: BODY NO. 3 (MAIN BODY ECU LH) REFERENCE Item Test Details Diagnostic Note TURN LAMP RH RH side turn signal lights operation ON / OFF - TURN LAMP LH LH side turn signal lights operation ON / OFF - OK: Turn signal lights flash. NG : Go to step 3 OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
3. INSPECT FUSE (LH-IG, TURN-HAZ) Remove the LH-IG fuse from the cowl side J/B LH. Remove the TURN-HAZ fuse from the engine room No. 1 J/B. Measure the resistance of the fuses. Standard resistance: Below 1 ohms NG : REPLACE FUSE OK: Go To Next Step
4. CHECK HARNESS AND CONNECTOR (POWER SOURCE) Disconnect the J30 flasher connector. Measure the resistance according to the value(s) in the table below. Standard Resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition J30-7 (E) - Body ground Always Below 1 ohms Measure the voltage according to the value(s) in the table below. Standard Voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition J30-4 (B) - Body ground Always 10 to 14 V J30-1 (IG) - Body ground Engine switch on (IG) 10 to 14 V NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go To Next Step
5. REPLACE TURN SIGNAL FLASHER Temporarily replace the turn signal flasher with a new or normally functioning one. Check that the turn signal lights flash. OK: Turn signal lights flash. NG : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE OK : END
6. PERFORM ACTIVE TEST BY INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the engine switch on (IG). Turn the intelligent tester on. Select the item(s) in the ACTIVE TEST, and check the operation. ACTIVE TEST: BODY No. 3 (Main body ECU LH) ACTIVE TEST: BODY No. 3 (Main body ECU LH) REFERENCE Item Test Details Diagnostic Note TURN LAMP LH LH side turn signal lights operation ON / OFF - OK: Turn signal lights flash. NG : Go to step 7 OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
7. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU LH - BODY GROUND) Disconnect the LA main body ECU LH connector. Measure the voltage according to the value(s) in the table below. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition LA-16 (TL) - Body ground Always 10 to 14 V NG : Go to step 10 OK: Go To Next Step
8. CHECK HARNESS AND CONNECTOR (TURN SIGNAL FLASHER - HEADLIGHT) Disconnect the J30 flasher connector. Disconnect the B12 headlight connector. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition J30-3 (LL) - B12-9 Always Below 1 ohms J30-3 (LL) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go To Next Step
9. REPLACE TURN SIGNAL FLASHER Temporarily replace the turn signal flasher with a new or normally functioning one. Check that the turn signal lights flash. OK: Turn signal lights flash. NG : REPLACE MAIN BODY ECU LH (COWL SIDE J/B LH) OK : END
10. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU LH - TURN SIGNAL FLASHER) Disconnect the LA main body ECU LH connector. Disconnect the J30 flasher connector. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition LA-16 (TL) - J30-5 (EL) Always Below 1 ohms LA-16 (TL) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE TURN SIGNAL FLASHER
11. PERFORM ACTIVE TEST BY INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the engine switch on (IG). Turn the intelligent tester on. Select the item(s) in the ACTIVE TEST, and check the operation. ACTIVE TEST: BODY No. 3 (Main body ECU LH) ACTIVE TEST: BODY NO. 3 (MAIN BODY ECU LH) REFERENCE Item Test Details Diagnostic Note TURN LAMP RH RH side turn signal lights operation ON / OFF - OK: Turn signal lights flash. NG : Go to step 12 OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
12. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU LH - BODY GROUND) Disconnect the LA main body ECU LH connector. Measure the voltage according to the value(s) in the table below. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition LA-15 (TR) - Body ground Always 10 to 14 V NG : Go to step 15 OK: Go To Next Step
13. CHECK HARNESS AND CONNECTOR (TURN SIGNAL FLASHER - HEADLIGHT) Disconnect the J30 flasher connector. Disconnect the B2 headlight connector. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition J30-2 (LR) - B2-9 Always Below 1 ohms J30-2 (LR) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go To Next Step
14. REPLACE TURN SIGNAL FLASHER Temporarily replace the turn signal flasher with a new or normally functioning one. Check that the turn signal lights flash. OK: Turn signal lights flash. NG : REPLACE MAIN BODY ECU LH (COWL SIDE J/B LH) OK : END
15. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU LH - TURN SIGNAL FLASHER) Disconnect the LA main body ECU LH connector. Disconnect the J30 flasher connector. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition LA-15 (TR) - J30-6 (ER) Always Below 1 ohms LA-15 (TR) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE TURN SIGNAL FLASHER

The hazard warning switch sends a signal to the turn signal flasher.

The turn signal flasher blinks the turn signal lights.

Also, the main body ECU RH activates the flasher relay when the alarm of the theft deterrent system goes off.

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1. PERFORM ACTIVE TEST BY INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the engine switch on (IG). Turn the intelligent tester on. Select the item(s) in the ACTIVE TEST, and check the operation. ACTIVE TEST: MAIN BODY (Main body ECU RH) ACTIVE TEST: MAIN BODY (MAIN BODY ECU RH) REFERENCE Item Test Details Diagnostic Note HAZARD LH and RH side turn signal lights operation ON / OFF - OK: LH and RH side turn signal lights flash. NG : Go to step 4 OK: Go To Next Step
2. INSPECT CLOCK ASSEMBLY Remove the clock assembly. Measure the resistance according to the value(s) in the table below. Standard resistance: Without Navigation System SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition J54-12 (F) - J54-8 (E) Switch is pushed in Below 1 ohms J54-12 (F) - J54-8 (E) Switch is not pushed in 10 kohms or higher With Navigation System SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition J53-12 (F) - J53-2 (E) Switch is pushed in Below 1 ohms J53-12 (F) - J53-2 (E) Switch is not pushed in 10 kohms or higher NG : REPLACE CLOCK ASSEMBLY OK: Go To Next Step
3. CHECK HARNESS AND CONNECTOR (CLOCK ASSEMBLY - TURN SIGNAL FLASHER) Remove the clock assembly. Disconnect the J30 flasher connector. Measure the resistance according to the value(s) in the table below. Standard resistance: Without Navigation System SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition J54-12 (F) - J30-8 (HAZ) Always Below 1 ohms J54-12 (F) - Body ground Always 10 kohms or higher With Navigation System SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition J53-12 (F) - J30-8 (HAZ) Always Below 1 ohms J53-12 (F) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
4. INSPECT FUSE (LH-IG, TURN-HAZ) Remove the LH-IG fuse from the cowl side J/B LH. Remove the TURN-HAZ fuse from the engine room No.1 J/B. Measure the resistance of the fuse. Standard resistance: Below 1 ohms NG : REPLACE FUSE OK: Go To Next Step
5. CHECK HARNESS AND CONNECTOR (POWER SOURCE) Disconnect the J30 flasher connector. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition J30-7 (E) - Body ground Always Below 1 ohms Measure the voltage according to the value(s) in the table below. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition J30-4 (B) - Body ground Always 10 to 14 V J30-1 (IG) - Body ground Engine switch on (IG) 10 to 14 V NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go To Next Step
6. CHECK HARNESS AND CONNECTOR Remove the clock assembly. Disconnect the J30 flasher connector. Measure the resistance according to the value(s) in the table below. Standard resistance: Without Navigation System SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition J54-12 (F) - J30-8 (HAZ) Always Below 1 ohms J54-12 (F) - Body ground Always 10 kohms or higher With Navigation System SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition J53-12 (F) - J30-8 (HAZ) Always Below 1 ohms J53-12 (F) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE TURN SIGNAL FLASHER

Front light

The front controller controls the operation of the FR TAIL relay. The FR TAIL relay turns on the front side marker lights and parking lights.

The front controller receives front side marker and parking light ON request signals from the combination switch ECU through BEAN communication and activates the FR TAIL relay.

The FR TAIL relay is built into the front controller, so unlike conventional relays, it cannot be removed for inspection.

Rear light

The main body ECU RH controls the operation of the TAIL relay. The TAIL relay turns on the taillights, license plate lights, and side marker lights.

The main body ECU RH receives taillight, license plate light, and side marker light ON request signals from the combination switch ECU through BEAN communication and activates the TAIL relay.

The TAIL relay is built into the cowl side J/B LH, so unlike conventional relays, it cannot be removed for inspection.

Scheme 70

Scheme 71

Note. Before proceeding to the following flowchart, check that the fuses are not blown and that the bulbs are not burned out.

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Scheme 85

1. CHECK TAILLIGHT (OPERATION) Turn the engine switch on (IG). When the taillight switch is operated, check that the following lights illuminate. HINT: The front lights (front side marker lights and parking lights) share the same drive circuit. Therefore, if one of the front lights does not come on, there may be a problem in the circuit between the FR TAIL relay and bulb, or the circuit between the bulb and body ground. Inspect those circuits to identify the problem. The rear lights (taillights, license plate lights, and side marker lights) share the same drive circuit. Therefore, if one of the rear lights does not come on, there may be a problem in the circuit between the TAIL relay and the bulb or LED, or the circuit between the bulb or LED and body ground. Inspect those circuits to identify the problem. Result RESULT REFERENCE Result Proceed to Neither front nor rear lights illuminate A Front lights (front side marker lights and parking lights) do not illuminate B Rear lights (taillights, license plate lights, and side marker lights) do not illuminate C B : Go to step 2 C : Go to step 6 A : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
2. PERFORM ACTIVE TEST BY INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the engine switch on (IG). Turn the intelligent tester on. Select the item(s) in the ACTIVE TEST, and check the operation. ACTIVE TEST: BODY No. 5 (Front Controller) ACTIVE TEST: BODY NO. 5 (FRONT CONTROLLER) REFERENCE Item Test Details Diagnostic Note CLEARANCE LIGHT Clearance light (Front side marker lights and parking lights) ON / OFF - OK: Front side marker lights and parking lights illuminate. NG : Go to step 3 OK : REPLACE ENGINE ROOM NO.2 R/B (FRONT CONTROLLER)
3. CHECK HARNESS AND CONNECTOR (HEADLIGHT - BODY GROUND) HINT: Perform the following inspection on either the LH or RH side. Disconnect the B2 or B12 headlight connector. Measure the resistance according to the value(s) in the table below. Standard resistance: RH side SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition B2-5 (E) - Body ground Always Below 1 ohms B2-8 (E) - Body ground Always Below 1 ohms LH side SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition B12-5 (E) - Body ground Always Below 1 ohms B12-8 (E) - Body ground Always Below 1 ohms NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go To Next Step
4. CHECK HARNESS AND CONNECTOR (HEADLIGHT - BODY GROUND) HINT: Perform the following inspection on either the LH or RH side. Disconnect the B2 or B12 headlight connector. Measure the voltage according to the value(s) in the table below. Standard voltage: RH side SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition B2-6 (B) - Body ground Engine switch off Below 1 V B2-6 (B) - Body ground Engine switch on (IG) and taillights on 10 to 14 V B2-7 (B) - Body ground Engine switch off Below 1 V B2-7 (B) - Body ground Engine switch on (IG) and taillights on 10 to 14 V LH side SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition B12-6 (B) - Body ground Engine switch off Below 1 V B12-6 (B) - Body ground Engine switch on (IG) and taillights on 10 to 14 V B12-7 (B) - Body ground Engine switch off Below 1 V B12-7 (B) - Body ground Engine switch on (IG) and taillights on 10 to 14 V NG : Go to step 5 OK : REPLACE HEADLIGHT ASSEMBLY
5. CHECK HARNESS AND CONNECTOR (HEADLIGHT - ENGINE ROOM NO.2 R/B) HINT: Perform the following inspection on either the LH or RH side. Disconnect the B2 or B12 headlight connector. Disconnect the 2G engine room No. 2 R/B connector. Measure the resistance according to the value(s) in the table below. Standard resistance: RH side SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition B2-6 (B) - 2G-10 Always Below 1 ohms B2-6 (B) - Body ground Always 10 kohms or higher B2-7 (B) - 2G-8 Always Below 1 ohms B2-7 (B) - Body ground Always 10 kohms or higher LH side SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition B12-6 (B) - 2G-11 Always Below 1 ohms B12-6 (B) - Body ground Always 10 kohms or higher B12-7 (B) - 2G-9 Always Below 1 ohms B12-7 (B) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE ENGINE ROOM NO.2 R/B (FRONT CONTROLLER)
6. PERFORM ACTIVE TEST BY INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the engine switch on (IG). Turn the intelligent tester on. Select the item(s) in the ACTIVE TEST, and check the operation. ACTIVE TEST: MAIN BODY (Main Body ECU RH) ACTIVE TEST: BODY NO. 5 (FRONT CONTROLLER) REFERENCE Item Test Details Diagnostic Note TAIL LIGHT Taillights (taillights, license plate lights and side marker lights) ON / OFF - OK: Taillights, license plate lights and side marker lights illuminate. Result RESULT REFERENCE Result Proceed to Inner taillights do not illuminate A Outer taillights and side marker lights do not illuminate B License plate lights do not illuminate C All rear lights illuminate D All rear lights do not illuminate E HINT: If the outer taillights illuminate normally, but the side marker lights do not illuminate, or vice versa, there is an open circuit in the rear combination light. B : Go to step 9 C : Go to step 11 D : REPLACE MAIN BODY ECU RH (COWL SITE J/B RH) E : Go to step 15 A : Go To Next Step
7. CHECK HARNESS AND CONNECTOR (INNER TAILLIGHT - BODY GROUND) HINT: Perform the following inspection on either the LH or RH side. Disconnect the Q46 or Q40 inner taillight connector. Measure the resistance according to the value(s) in the table below. Standard resistance: RH side SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition Q46-3 - Body ground Always Below 1 ohms LH side SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition Q40-3 - Body ground Always Below 1 ohms NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go To Next Step
8. CHECK HARNESS AND CONNECTOR (INNER TAILLIGHT - MAIN BODY ECU LH) HINT: Perform the following inspection on either the LH or RH side. Disconnect the Q46 or Q40 inner taillight connector. Measure the voltage according to the value(s) in the table below. Standard voltage: RH side SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition Q46-1 - Body ground Engine switch off Below 1 V Q46-1 - Body ground Engine switch on (IG) and taillights on 10 to 14 V LH side SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition Q40-1 - Body ground Engine switch off Below 1 V Q40-1 - Body ground Engine switch on (IG) and taillights on 10 to 14 V NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE INNER COMBINATION LIGHT
9. CHECK HARNESS AND CONNECTOR (OUTER TAILLIGHT - BODY GROUND) HINT: Perform the following inspection on either the LH or RH side. Disconnect the Q51 or Q50 outer taillight connector. Measure the resistance according to the value(s) in the table below. Standard resistance: RH side SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition Q51-6 (E) - Body ground Always Below 1 ohms LH side SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition Q50-6 (E) - Body ground Always Below 1 ohms NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go To Next Step
10. CHECK HARNESS AND CONNECTOR (OUTER TAILLIGHT - MAIN BODY ECU LH) HINT: Perform the following inspection on either the LH or RH side. Disconnect the Q51 or Q50 outer taillight connector. Measure the voltage according to the value(s) in the table below. Standard voltage: RH side SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition Q51-3 - Body ground Engine switch off Below 1 V Q51-3 - Body ground Engine switch on (IG) and taillights on 10 to 14 V LH side SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition Q50-3 - Body ground Engine switch off Below 1 V Q50-3 - Body ground Engine switch on (IG) and taillights on 10 to 14 V NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE OUTER COMBINATION LIGHT
11. CHECK HARNESS AND CONNECTOR (LICENSE PLATE LIGHT LH - BODY GROUND) HINT: Perform the following inspection on the LH side. Disconnect the Q47 license plate light LH connector. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition Q47-2 (E)- Body ground Always Below 1 ohms NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go To Next Step
12. CHECK HARNESS AND CONNECTOR (LICENSE PLATE LIGHT RH - MAIN BODY ECU LH) HINT: Perform the following inspection on the RH side. Disconnect the Q44 license plate light RH connector. Measure the voltage according to the value(s) in the table below. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition Q44-1 (B) - Body ground Engine switch off Below 1 V Q44-1 (B) - Body ground Engine switch on (IG) and taillights on 10 to 14 V NG : REPAIR OR REPLACE HARNESS OR CONNECTOR
13. CHECK HARNESS AND CONNECTOR (LICENSE PLATE LIGHT RH - LICENSE PLATE LIGHT RH) HINT: Perform the following inspection on the LH side. Connect the Q44 license plate light RH connector. Disconnect the Q47 license plate light LH connector. Measure the voltage according to the value(s) in the table below. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition Q47-1 (B) - Body ground Engine switch off Below 1 V Q47-1 (B) - Body ground Engine switch on (IG) and taillights on 10 to 14 V NG : Go to step 14 OK : REPLACE LICENSE PLATE LIGHT (LH SIDE)
14. CHECK HARNESS AND CONNECTOR (LICENSE PLATE LIGHT LH - LICENSE PLATE LIGHT RH) Disconnect the Q44 license plate light RH connector. Disconnect the Q47 license plate light LH connector. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition Q44-2 (E) - Q47-1 (B) Always Below 1 ohms Q44-2 (E) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE LICENSE PLATE LIGHT (RH SIDE)
15. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU RH - BODY GROUND) Disconnect the RD main body ECU RH connector. Measure the voltage according to the value(s) in the table below. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition RD-1 (TRLY) - Body ground Always 10 to 14 V NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go To Next Step
16. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU RH - MAIN BODY ECU LH) Connect the RD main body ECU RH connector. Measure the voltage according to the value(s) in the table below. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition RD-1 (TRLY) - Body ground Engine switch off Below 1 V RD-1 (TRLY) - Body ground Engine switch on (IG) and taillights on 10 to 14 V NG : REPLACE MAIN BODY ECU RH (COWL SIDE J/B RH) OK: Go To Next Step
17. INSPECT MAIN BODY ECU LH (COWL SIDE J/B LH) Disconnect the LJ main body ECU LH connector. Measure the voltage according to the value(s) in the table below. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition LJ-24 - Body ground Engine switch off Below 1 V LJ-24 - Body ground Engine switch on (IG) and taillights on 10 to 14 V NG : REPLACE MAIN BODY ECU LH (COWL SIDE J/B LH) OK : REPAIR OR REPLACE HARNESS OR CONNECTOR (MAIN BODY ECU LH - EACH REAR LIGHT)

The combination switch ECU (windshield wiper switch assembly) receives the following switch information.

1. Light control switch position is Off, Tail, Head, or Auto
2. Headlight dimmer switch position is High, Low, or Flash (Pass)
3. Turn signal switch position is LH, RH or Off
4. Fog light switch position is On or Off

The combination switch ECU then converts these signals to BEAN signals and sends them to each ECU via the multiplex communication system.

The headlight dimmer switch assembly includes the light control, headlight dimmer, turn signal, and fog light switches.

Scheme 86

HINT

Before starting the procedure, check that the multiplex communication system DTCs are not output (See DTC CHECK/CLEAR ).

Scheme 87

Scheme 88

1. READ VALUE OF INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the engine switch on (IG). Turn the intelligent tester on. Select the item(s) in the DATA LIST, and read the display on the intelligent tester. DATA LIST: COMBI SW (Combination Switch ECU) DATA LIST: COMBI SW (COMBINATION SWITCH ECU) REFERENCE Item Measurement Item / Display (Range) Normal Condition Diagnostic Note F FOG LIGHT SW Front fog light switch signal / ON or OFF ON: Front fog light switch is in ON position OFF: Front fog light switch is not in ON position - HIGH FLASHER SW Passing light switch signal / ON or OFF ON: Headlight dimmer switch is in FLASH (PASS) position OFF: Headlight dimmer switch is not in FLASH (PASS) position - DIMMER HI SW High beam switch signal / ON or OFF ON: Headlight dimmer switch is in HI position OFF: Headlight dimmer switch is not in HI position - LIGHT AUTO SW Auto light switch signal / ON or OFF ON: Light control switch is in AUTO position OFF: Light control switch is not in AUTO position - HEAD LIGHT SW Headlight control switch signal / ON or OFF ON: Light control switch is in HEAD position OFF: Light control switch is not in HEAD position - TAIL LIGHT SW Taillight switch signal / ON or OFF ON: Light control switch is in TAIL or HEAD position OFF: Light control switch is not in OFF position - TURN LEFT SW Turn signal switch LH signal / ON or OFF ON: Light control switch is in LH position OFF: Light control switch is not in LH position - TURN RIGHT SW Turn signal switch RH signal / ON or OFF ON: Light control switch is in RH position OFF: Light control switch is not in RH position - IG SW SIG Engine switch signal / ON or OFF ON: Engine switch on (IG) OFF: Engine switch off - OK: Condition information can be displayed. NG : Go to step 2 OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
2. INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY HINT: Inspect the items that did not change as a result of monitoring the DATA LIST. Remove the headlight dimmer switch assembly. Measure the resistance according to the value(s) in the table below. Standard resistance: Light Control Switch SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Switch Condition Specified Condition f1-12 (EL) - f1-18 (T) OFF 10 kohms or higher f1-18 (T) - f1-19 (AUTO) OFF 10 kohms or higher f1-19 (AUTO) - f1-20 (H) OFF 10 kohms or higher f1-12 (EL) - f1-18 (T) TAIL Below 1 ohms f1-12 (EL) - f1-18 (T) HEAD Below 1 ohms f1-18 (T) - f1-20 (H) HEAD Below 1 ohms f1-12 (EL) - f1-19 (AUTO) AUTO Below 1 ohms Headlight Dimmer Switch SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Switch Condition Specified Condition f1-11 (HU) - f1-12 (EL) LOW BEAM Below 1 ohms f1-11 (HU) - f1-12 (EL) HI BEAM Below 1 ohms f1-12 (EL) - f1-17 (HF) HI BEAM Below 1 ohms Turn Signal Switch SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Switch Condition Specified Condition f1-12 (EL) - f1-13 (TR) Right turn Below 1 ohms f1-12 (EL) - f1-13 (TR) Neutral 10 kohms or higher f1-12 (EL) - f1-15 (TL) Neutral 10 kohms or higher f1-12 (EL) - f1-15 (TL) Left turn Below 1 ohms Fog Light Switch SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Switch Condition Specified Condition f1-3 (LFG) - f1-4 (BFG) OFF 10 kohms or higher f1-3 (LFG) - f1-4 (BFG) Fog light switch ON Below 1 ohms NG : REPLACE HEADLIGHT DIMMER SWITCH ASSEMBLY OK: Go To Next Step
3. CHECK HARNESS AND CONNECTOR Disconnect the J26 windshield wiper switch assembly connector. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition J26-5 (E) - Body ground Always Below 1 ohms Measure the voltage according to the value(s) in the table below. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition J26-1 (B) - J26-5 (E) Always 10 to 14 V J26-2 (IG) - J26-5 (E) Engine switch on (IG) 10 to 14 V NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY

The main body ECU RH receives the HEAD position signal from the combination switch as a backup link. It also receives the signal from the combination switch via the multiplex communication system. If this link is grounded, the headlights will illuminate.

Scheme 89

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Scheme 93

1. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU RH - COMBINATION SWITCH ASSEMBLY) Disconnect the J26 combination switch connector. Measure the voltage according to the value(s) in the table below. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition J26-4 (HEAD) - Body ground Always 10 to 14 V NG : Go to step 4 OK: Go To Next Step
2. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU RH - COMBINATION SWITCH) Connect the J26 combination switch connector. Measure the voltage according to the value(s) in the table below. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition J26-4 (HEAD) - Body ground Light control switch position is off position 10 to 14 V J26-4 (HEAD) - Body ground Light control switch position is HEAD position Below 1 V NG : Go to step 3 OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
3. CHECK HARNESS AND CONNECTOR (COMBINATION SWITCH ASSEMBLY - BODY GROUND) Disconnect the J26 combination switch connector. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition J26-5 (E) - Body ground Always Below 1 ohms NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY
4. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU RH - COMBINATION SWITCH) Disconnect the J74 ECU connector. Disconnect the J26 combination switch connector. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition J74-23 (HEAD) - J26-4 (HEAD) Always Below 1 ohms J74-23 (HEAD) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE MAIN BODY ECU RH (COWL SIDE J/B RH)

The main body ECU RH detects the condition of each door courtesy switch and sends a signal to each ECU via the multiplex communication circuit.

Scheme 94

HINT

The procedure is the same for each door courtesy switch circuit. First, inspect the suspected door courtesy switch circuit.

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1. READ VALUE OF INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the engine switch on (IG). Turn the intelligent tester main switch on. Select the item below in the DATA LIST for proper functioning of the courtesy switch. DATA LIST: MAIN BODY (Main Body ECU LH) DATA LIST: MAIN BODY (MAIN BODY ECU LH) REFERENCE Item Measurement Item / Display (Range) Normal Condition Diagnostic Note D DOR CTY SW Driver side door courtesy switch / ON or OFF ON: Driver side door is open OFF: Driver side door is closed - P DOR CTY SW Passenger side door courtesy switch / ON or OFF ON: Passenger side door is open OFF: Passenger side door is closed - Rr DOR CTY SW Rear (LH and RH) door courtesy switch / ON or OFF ON: Rear door (LH or RH) is open OFF: Rear door (LH and RH) is closed - OK: Condition sign can be displayed. Result RESULT REFERENCE Result Proceed to OK A Driver side door courtesy switch does not operate B Front passenger side door courtesy switch does not operate C Both rear door courtesy switches do not operate D B : Go to step 2 C : Go to step 4 D : Go to step 6 A : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
2. INSPECT DOOR COURTESY SWITCH (FRONT LH) «INSPECTION»(ref-235577-S11073683592006062400000) OK: Door courtesy switch is normal. NG : REPLACE DOOR COURTESY SWITCH (FRONT LH) OK: Go To Next Step
3. CHECK HARNESS AND CONNECTOR (DOOR COURTESY SWITCH (FRONT LH) - MAIN BODY ECU RH) Disconnect the P1 ECU connector. Disconnect the Q11 switch connector. Measure the resistance of the wire harness side connectors. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition P1-14 (DCTY) - Q11-1 Always Below 1 ohms P1-14 (DCTY) or Q11-1 - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE MAIN BODY ECU RH (COWL SIDE J/B RH)
4. INSPECT DOOR COURTESY SWITCH (FRONT RH) «INSPECTION»(ref-235577-S11073683592006062400000) OK: Door courtesy switch is normal. NG : REPLACE DOOR COURTESY SWITCH (FRONT RH) OK: Go To Next Step
5. CHECK HARNESS AND CONNECTOR (DOOR COURTESY SWITCH (FRONT RH) - MAIN BODY ECU RH) Disconnect the J75 ECU connector. Disconnect the P8 switch connector. Measure the resistance of the wire harness side connectors. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition J75-23 (PCTY) - P8-1 Always Below 1 ohms J75-23 (PCTY) or P8-1 - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE MAIN BODY ECU RH (COWL SIDE J/B RH)
6. INSPECT DOOR COURTESY SWITCH (REAR LH AND REAR RH) «INSPECTION»(ref-235577-S31643572192006062400000) OK: Door courtesy switch is normal. NG : REPLACE DOOR COURTESY SWITCH (REAR LH OR REAR RH) OK: Go To Next Step
7. CHECK HARNESS AND CONNECTOR (DOOR COURTESY SWITCH (REAR LH OR REAR RH) - MAIN BODY ECU RH) Check the wire harness between the cowl side junction block RH and door courtesy switch (rear LH). Disconnect the RA junction block connector. Disconnect the Q17 switch connector. Measure the resistance of the wire harness side connectors. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition RA-11 (LCTY) - Q17-1 Always Below 1 ohms RA-11(LCTY) or Q17-1 - Body ground Always 10 kohms or higher Check the wire harness between the main body ECU RH and door courtesy switch (rear RH). Disconnect the P1 ECU connector. Disconnect the P16 switch connector. Measure the resistance of the wire harness side connectors. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition P1-16 (RCTY) - P16-1 Always Below 1 ohms P1-16 (RCTY) or P16-1 - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE MAIN BODY ECU RH (COWL SIDE J/B RH)

The operation timing of the scuff plate lights is the same as that of the front and rear interior lights. The scuff plate lights turn on when a door is opened, and turn off when the door is closed. This illumination setting can be canceled using the overhead J/B switch.

In addition, the scuff plate lights blink while the theft deterrent system is sounding an alarm.

The turning on and off of the scuff plate lights is controlled by the main body ECU LH based on various signals received through BEAN communication.

The main body ECU LH includes a MOS-FET (Metal Oxide Semiconductor - Field Effect Transistor) circuit that fades the scuff plate lights in and out by duty control.

This MOS-FET circuit has an overheat protection function as fail-safe. If the main body ECU LH becomes excessively hot, the scuff plate lights turn off and remain off.

Normal operation will resume when the conditions required to turn on the scuff plate lights are met again.

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1. PERFORM ACTIVE TEST BY INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the engine switch on (IG). Turn the intelligent tester on. Select the item(s) in the ACTIVE TEST, and check the operation. ACTIVE TEST: BODY No. 3 (Main body ECU LH) ACTIVE TEST: BODY NO. 3 (MAIN BODY ECU LH) REFERENCE Item Test Details Diagnostic Note INTERIOR LAMP Interior lights ON / OFF - OK: The scuff plate light LH and RH come on. Result RESULT REFERENCE Result Proceed to Scuff plate light LH does not comes on A Scuff plate light RH light does not comes on B Neither LH nor RH light comes on C OK D B : Go to step 5 C : Go to step 8 D : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE A : Go To Next Step
2. INSPECT SCUFF PLATE LIGHT (FRONT LH) Remove the scuff plate light. Connect the (+) lead from the battery to terminal 2 and the (-) lead to terminal 1, and then check that the scuff plate light comes on. OK: The scuff plate light comes on. NG : REPLACE SCUFF PLATE LIGHT OK: Go To Next Step
3. CHECK HARNESS AND CONNECTOR (SCUFF PLATE LIGHT - BODY GROUND) Disconnect the Q8 scuff plate light connector. Measure the voltage according to the value(s) in the table below. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition Q8-2 (+) - Body ground Always 10 to 14 V NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go To Next Step
4. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU LH - SCUFF PLATE LIGHT) Disconnect the Q8 scuff plate light connector. Disconnect the LA main body ECU LH connector. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition LA-19 (ILE1) - Q8-1 (-) Always Below 1 ohms LA-19 (ILE1) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE MAIN BODY ECU LH (COWL SIDE J/B LH)
5. INSPECT SCUFF PLATE LIGHT (FRONT RH) Remove the scuff plate light. Connect the (+) lead from the battery to terminal 2 and the (-) lead to terminal 1, and then check that the scuff plate light comes on. OK: The scuff plate light comes on. NG : REPLACE SCUFF PLATE LIGHT OK: Go To Next Step
6. CHECK HARNESS AND CONNECTOR (SCUFF PLATE LIGHT - BODY GROUND) Disconnect the P2 scuff plate light connector. Measure the voltage according to the value(s) in the table below. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition P2-2 (+) - Body ground Always 10 to 14 V NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go To Next Step
7. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU LH - SCUFF PLATE LIGHT) Disconnect the P2 scuff plate light connector. Disconnect the LA main body ECU LH connector. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition LA-19 (ILE1) - P2-1 (-) Always Below 1 ohms LA-19 (ILE1) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE MAIN BODY ECU LH (COWL SIDE J/B LH)
8. CHECK HARNESS AND CONNECTOR (POWER SOURCE OF SCUFF PLATE LIGHT) HINT: If neither of the scuff plate lights comes on as a result of the ACTIVE TEST, there may be problems in the power source and main body ECU LH. Perform the following inspection on either the LH or RH side. Disconnect the Q8 or P2 scuff plate light connector. Measure the voltage according to the value(s) in the table below. Standard voltage: Front Door RH SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition Q8-2 (+) - Body ground Always 10 to 14 V Front Door LH SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition P2-2 (+) - Body ground Always 10 to 14 V NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE MAIN BODY ECU LH (COWL SIDE J/B LH)

The seat illumination can be canceled using the overhead J/B switch.

The turning on and off of the seat illumination is controlled by the main body ECU LH based on various signals received through BEAN communication.

The main body ECU LH includes a MOS-FET (Metal Oxide Semiconductor - Field Effect Transistor) circuit that fades the seat illumination in and out by duty control.

This MOS-FET circuit has an overheat protection function as a fail-safe. If the main body ECU LH becomes excessively hot, the seat illumination turns off and remains off.

Normal operation will resume when the conditions required to turn on the seat illumination are met again.

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1. CHECK PERSONAL LIGHT (OPERATION) HINT: The personal lights and seat illumination share the same power source circuit. Therefore, if none of them come on, inspect the power source circuit first. Push the personal light switches. Check that personal lights come on. OK: Personal lights come on. NG : Go to step 7 OK: Go To Next Step
2. PERFORM ACTIVE TEST BY INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the engine switch on (IG). Turn the intelligent tester main switch on. Select the item(s) in the ACTIVE TEST, and check the operation. ACTIVE TEST: BODY No. 3 (Main body ECU LH) ACTIVE TEST: BODY NO. 3 (MAIN BODY ECU LH) REFERENCE Item Test Details Diagnostic Note INTERIOR LIGHT (DIM) Front and rear seat illumination ON / OFF - OK: Front and rear seat illumination come on. Result RESULT REFERENCE Result Proceed to Front seat illumination does not come on A Rear seat illumination does not come on B Neither front nor rear seat illumination comes on C OK D HINT: If the rear seat illumination comes on normally, but the front seat illumination does not come on, there is an open circuit in the overhead J/B. A : REPLACE OVERHEAD J/B B : Go to step 3 C : Go to step 5 D : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
3. INSPECT REAR DOME LIGHT ASSEMBLY (REAR SEAT ILLUMINATION) Remove the rear dome light assembly. Connect the (+) lead from the battery to terminal 2 and the (-) lead to terminal 5, and then check that the seat illumination comes on. OK: Seat illumination comes on. NG : REPLACE REAR DOME LIGHT ASSEMBLY OK: Go To Next Step
4. CHECK HARNESS AND CONNECTOR (OVERHEAD J/B - REAR DOME LIGHT ASSEMBLY) Disconnect the R8 rear dome light assembly connector. Disconnect the R5 overhead J/B connector. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition R8-2 (ILLB) - R5-4 (ILLB) Always Below 1 ohms R8-5 (LILL)- R5-32 (LILL) Always Below 1 ohms R8-2 (ILLB) - Body ground Always 10 kohms or higher R8-5 (LILL) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE OVERHEAD J/B
5. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU LH - OVERHEAD J/B) Disconnect the Q3 main body ECU LH connector. Measure the voltage according to the value(s) in the table below. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition Q3-3 (LGCY) - Body ground Always 10 to 14 V NG : Go to step 6 OK : REPLACE MAIN BODY ECU LH (COWL SIDE J/B LH)
6. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU LH - OVERHEAD J/B) Disconnect the Q3 main body ECU LH connector. Disconnect the R5 overhead J/B connector. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition Q3-3 (LGCY) - R5-12 (CTY) Always Below 1 ohms Q3-3 (LGCY) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE OVERHEAD J/B
7. CHECK HARNESS AND CONNECTOR (POWER SOURCE) Disconnect the R5 overhead J/B connector. Measure the voltage according to the value(s) in the table below. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition R5-1 (+B1) - Body ground Always 10 to 14 V NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE OVERHEAD J/B

The turning on and off of the shift illumination is controlled by the main body ECU LH based on various signals received through BEAN communication.

The main body ECU LH includes a MOS-FET (Metal Oxide Semiconductor - Field Effect Transistor) circuit that fades the shift illumination in and out by duty control.

This MOS-FET circuit has an overheat protection function as a fail-safe. If the main body ECU LH becomes excessively hot, the shift illumination turns off and remains off.

Normal operation will resume when the conditions required to turn on the shift illumination are met again.

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1. CHECK PERSONAL LIGHT (OPERATION) HINT: The personal lights and shift illumination share the same power source circuit. Therefore, if none of them come on, inspect the power source circuit first. Push the switches for the personal lights. Check that the personal lights come on. OK: Personal lights come on. NG : Go to step 5 OK: Go To Next Step
2. PERFORM ACTIVE TEST BY INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the engine switch on (IG). Turn the intelligent tester main switch on. Select the item(s) in the ACTIVE TEST, and check the operation. ACTIVE TEST: BODY No. 3 (Main body ECU LH) ACTIVE TEST: BODY NO. 3 (MAIN BODY ECU LH) REFERENCE Item Test Details Diagnostic Note SHIFT LIGHT CTL Shift illumination ON / OFF - OK: The shift illumination comes on. NG : Go to step 3 OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU LH - OVERHEAD J/B) Disconnect the Q1 main body ECU LH connector. Measure the voltage according to the value(s) in the table below. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition Q1-3 (RCTY) - Body ground Always 10 to 14 V NG : Go to step 4 OK : REPLACE MAIN BODY ECU LH (COWL SIDE J/B LH)
4. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU LH - OVERHEAD J/B) Disconnect the Q1 main body ECU LH connector. Disconnect the R5 overhead J/B connector Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition Q1-3 (RCTY) - R5-14 (SHFT) Always Below 1 ohms Q1-3 (RCTY) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE OVERHEAD J/B
5. CHECK HARNESS AND CONNECTOR (POWER SOURCE) Disconnect the R5 overhead J/B connector Measure the voltage according to the value(s) in the table below. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition R5-1 (+B1) - Body ground Always 10 to 14 V NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE OVERHEAD J/B

The Interior lights turn on when a door is opened, and turn off when the door is closed. This illumination setting can be canceled using the overhead J/B switch.

In addition, the interior lights blink while the theft deterrent system is sounding an alarm.

The turning on and off of the interior lights is controlled by the main body ECU LH based on various signals received through BEAN communication.

The main body ECU LH includes a MOS-FET (Metal Oxide Semiconductor - Field Effect Transistor) circuit that fades the interior lights in and out by duty control.

This MOS-FET circuit has an overheat protection function as fail-safe. If the main body ECU LH becomes excessively hot, the interior lights turn off and remain off.

Normal operation will resume when the conditions required to turn on the interior lights are met again. If the vehicle is equipped with scuff plate lights, their operation timing is the same as that of the interior lights.

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1. CHECK SEAT ILLUMINATION (OPERATION) HINT: The personal lights and interior lights share the same power source. Therefore, if none of them come on, inspect the power source circuit first. Push the switches for the personal lights. Check that personal lights come on. OK: Personal lights come on. NG : Go to step 7 OK: Go To Next Step
2. PERFORM ACTIVE TEST BY INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the engine switch on (IG). Turn the intelligent tester on. Select the item(s) in the ACTIVE TEST, and check the operation. ACTIVE TEST: BODY No. 3 (Main body ECU LH) ACTIVE TEST: BODY NO. 3 (MAIN BODY ECU LH) REFERENCE Item Test Details Diagnostic Note INTERIOR LAMP Interior lights ON / OFF - OK: The front and rear interior lights come on. Result RESULT REFERENCE Result Proceed to Front interior light does not come on A Rear interior light does not come on B Neither front nor rear interior light comes on C OK D HINT: If the rear interior light comes on normally, but the front interior light does not come on, there is an open circuit in the overhead J/B. A : REPLACE MAIN BODY ECU LH (COWL SIDE J/B LH) B : Go to step 3 C : Go to step 5 D : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
3. INSPECT REAR DOME LIGHT ASSEMBLY (REAR INTERIOR LIGHT) Remove the rear dome light assembly. Connect the (+) lead from the battery to terminal 2 and the (-) lead to terminal 4, and then check that the Interior light comes on. OK: The interior light comes on. NG : REPLACE REAR DOME LIGHT ASSEMBLY OK: Go To Next Step
4. CHECK HARNESS AND CONNECTOR (OVERHEAD J/B - REAR DOME LIGHT ASSEMBLY) Disconnect the R8 rear dome light assembly connector. Disconnect the R5 overhead J/B connector. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition R8-2 (ILLB) - R5-4 (ILLB) Always Below 1 ohms R8-4 (RILL) - R5-33 (RILL) Always Below 1 ohms R8-2 (ILLB) - Body ground Always 10 kohms or higher R8-4 (RILL) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE MAIN BODY ECU LH (COWL SIDE J/B LH)
5. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU LH - OVERHEAD J/B) Disconnect the Q1 main body ECU LH connector. Measure the voltage according to the value(s) in the table below. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition Q1-2 (ILE) - Body ground Always 10 to 14 V NG : Go to step 6 OK : REPLACE MAIN BODY ECU LH (COWL SIDE J/B LH)
6. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU LH - OVERHEAD J/B) Disconnect the Q1 main body ECU LH connector. Disconnect the R5 overhead J/B connector. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition Q1-2 (ILE) - R5-13 (ILL) Always Below 1 ohms Q1-2 (ILE) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE MAIN BODY ECU LH (COWL SIDE J/B LH)
7. CHECK HARNESS AND CONNECTOR (POWER SOURCE) Disconnect the R5 overhead J/B connector. Measure the voltage according to the value(s) in the table below. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition R5-1 (+B1) - Body ground Always 10 to 14 V NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE MAIN BODY ECU LH (COWL SIDE J/B LH)

The main body ECU RH receives information on the front interior light switch (marked ON/OFF).

The main body ECU LH receives information on the front interior light switch (marked DOOR).

According to the position of each switch, the main body ECU RH controls the turning on and off of the interior lights, and the main body ECU LH controls the illuminated entry system.

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1. READ VALUE OF INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the engine switch on (IG). Turn the intelligent tester main switch on. Select the item(s) in the DATA LIST, and read the display on the intelligent tester. DATA LIST: MAIN BODY (Main Body ECU RH) DATA LIST: MAIN BODY (MAIN BODY ECU RH) REFERENCE Item Measurement Item / Display (Range) Normal Condition Diagnostic Note ILLUMI SW Front interior light switch (marked ON/OFF) signal/ ON or OFF ON: Front interior light switch (marked ON/OFF) is pushed in OFF: Front interior light switch (marked ON/OFF) is not pushed in - DATA LIST: BODY No. 3 (Main Body ECU LH) DATA LIST: MAIN BODY (MAIN BODY ECU RH) REFERENCE Item Measurement Item / Display (Range) Normal Condition Diagnostic Note INTERIOR LIGHT Front interior light switch (marked DOOR) signal/ ON or OFF ON: Front interior light switch (marked DOOR) is pushed in OFF: Front interior light switch (marked DOOR) is not pushed in - OK: Switch condition can be displayed. Result RESULT REFERENCE Result Proceed to Indication for "ILLUMI SW" does not change A Indication for "INTERIOR LIGHT" does not change B Indications for both "ILLUMI SW" and "INTERIOR LIGHT" do not change C OK D A : Go to step 2 B : Go to step 4 C : Go to step 6 D : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
2. INSPECT OVERHEAD J/B Remove the overhead J/B. Measure the resistance according to the value(s) in the table. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition R5-34 (CILL) - R5-18 (GND3) Front interior light switch (marked ON/OFF) is not pushed in 10 kohms or higher R5-34 (CILL) - R5-18 (GND3) Front interior light switch (marked ON/OFF) is pushed in Approx. 10 ohms NG : REPLACE OVERHEAD J/B OK: Go To Next Step
3. CHECK HARNESS AND CONNECTOR (OVERHEAD J/B - MAIN BODY ECU RH) Disconnect the R5 overhead J/B connector. Disconnect the J75 main body ECU RH connector. Measure the resistance according to the value(s) in the table. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition R5-34 (CILL) - J75-4 (UL2) Always Below 1 ohms R5-34 (CILL) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE MAIN BODY ECU LH (COWL SIDE J/B LH)
4. INSPECT OVERHEAD J/B Remove the overhead J/B. Measure the resistance according to the value(s) in the table. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Switch Condition Specified Condition R5-35 (DOOR) - R5-18 (GND3) Front interior light switch (marked DOOR) is not pushed in 10 kohms or higher R5-35 (DOOR) - R5-18 (GND3) Front interior light switch (marked DOOR) is pushed in Approx. 10 ohms NG : REPLACE OVERHEAD J/B OK: Go To Next Step
5. CHECK HARNESS AND CONNECTOR (OVERHEAD J/B - MAIN BODY ECU LH) Disconnect the R5 overhead J/B connector. Disconnect the Q3 main body ECU LH connector. Measure the resistance according to the value(s) in the table. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition R5-35 (DOOR) - Q3-11 (BDCY) Always Below 1 ohms R5-35 (DOOR) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE MAIN BODY ECU LH (COWL SIDE J/B LH)
6. INSPECT OVERHEAD J/B Remove the overhead J/B. Measure the resistance according to the value(s) in the table. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Switch Condition Specified Condition R5-35 (DOOR) - R5-18 (GND3) Front interior light switch (marked DOOR) is not pushed in 10 kohms or higher R5-35 (DOOR) - R5-18 (GND3) Front interior light switch (marked DOOR) is pushed in Approx. 10 ohms R5-34 (CILL) - R5-18 (GND3) Front interior light switch (marked ON/OFF) is not pushed in 10 kohms or higher R5-34 (CILL) - R5-18 (GND3) Front interior light switch (marked ON/OFF) is pushed in Approx. 10 ohms NG : REPLACE OVERHEAD J/B OK : REPAIR OR REPLACE HARNESS OR CONNECTOR (OVERHEAD J/B GROUND CIRCUIT)

The main body ECU RH receives information regarding the door lock position switches, door courtesy switches, and engine switch, and turns on each footwell light.

This illumination setting can be canceled using the light control rheostat.

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1. PERFORM ACTIVE TEST BY INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the engine switch on (IG). Turn the intelligent tester main switch on. Select the item(s) in the ACTIVE TEST, and check the operation. ACTIVE TEST: MAIN BODY (Main body ECU RH) ACTIVE TEST: MAIN BODY (MAIN BODY ECU RH) REFERENCE Item Test Details Diagnostic Note STEP LIGHT Footwell lights ON / OFF - HINT: The footwell lights RH and LH share the same power source. If either of the lights does not come on, there may be a problem in the part of the circuit that relates to that light. Therefore, inspect that part of the circuit. NG : Go to step 2 OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
2. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU RH - BATTERY) Disconnect the J75 main body ECU RH connector. Measure the voltage according to the value(s) in the table. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition J75-15 (FSPT) - Body ground Always 10 to 14 V NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE MAIN BODY ECU RH (COWL SIDE J/B RH)

The turning on and off of the door mirror foot lights is controlled by the main body LH based on various signals received through BEAN communication.

The main body ECU LH includes a MOS-FET (Metal Oxide Semiconductor - Field Effect Transistor) circuit that fades the door mirror foot lights in and out by duty control.

This MOS-FET circuit has an overheat protection function as a fail-safe. If the main body ECU LH becomes excessively hot, the door mirror foot lights turn off and remain off.

Normal operation will resume when the conditions required to turn on the door mirror foot lights are met again.

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1. PERFORM ACTIVE TEST BY INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the engine switch on (IG). Turn the intelligent tester main switch on. Select the item(s) in the ACTIVE TEST, and check the operation. ACTIVE TEST: BODY No. 3 (Main body ECU LH) ACTIVE TEST: BODY NO. 3 (MAIN BODY ECU LH) REFERENCE Item Test Details Diagnostic Note EX FOOT LIGHT Door mirror foot lights ON / OFF - OK: Door mirror foot lights come on. HINT: The door mirror foot lights RH and LH share the same power source. If either of the lights does not come on, there may be a problem in the part of the circuit that relates to that light. Therefore, inspect that part of the circuit. NG : Go to step 2 OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
2. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU LH - BATTERY) Disconnect the Q1 main body ECU LH connector. Measure the voltage according to the value(s) in the table. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition Q1-4 (LCTY) - Body ground Always 10 to 14 V NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE MAIN BODY ECU LH (COWL SIDE J/B LH)

This circuit detects the state of the engine switch. The AFS ECU receives it from the engine switch.

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1. INSPECT AFS ECU Measure the voltage of the connector. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition A27-1 (E1) - A27-2 (IG) Engine switch off Below 1 V A27-1 (E1) - A27-2 (IG) Engine switch on (IG) 10 to 14 V NG : Go to step 2 OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
2. CHECK WIRE HARNESS (AFS ECU - BODY GROUND) Disconnect the A27 connector. Measure the resistance of the wire harness side connector. Standard resistance SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition A27-1 (E1) - Body ground Always Below 1 ohms NG : REPAIR OR REPLACE HARNESS OR CONNECTOR (AFS ECU - BODY GROUND) OK: Go To Next Step
3. INSPECT AFS ECU Disconnect the A27 connector. Measure the voltage of the connector. Standard voltage SPECIFIED CONDITION AND TESTER CONNECTION Tester Connection Condition Specified Condition A27-1 (IG) - A27-2 (E1) Engine switch on (IG) 10 to 14 V NG : REPAIR OR REPLACE HARNESS OR CONNECTOR (AFS ECU - BATTERY) OK : REPLACE AFS ECU

The AFS OFF switch uses the multiplex communication system. First make sure that the multiplex communication system is functioning normally before performing troubleshooting on the AFS OFF switch.

Scheme 137

1. CHECK MULTIPLEX COMMUNICATION SYSTEM Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-235577-S01202113772006062400000) . If the multiplex communication system is operating normally, proceed to the next step.
2. PERFORM ACTIVE TEST BY INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the engine switch on (IG). Turn the intelligent tester main switch on. Select the item(s) in the ACTIVE TEST, and check the operation. ACTIVE TEST: METER ACTIVE TEST: METER REFERENCE Item Test Details Diagnostic Note AFS INDICATOR AFS OFF indicator light OFF / ON - OK: AFS OFF indicator comes on. NG : GO TO COMBINATION METER SYSTEM OK: Go To Next Step
3. READ VALUE OF INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the engine switch on (IG). Turn the intelligent tester main switch on. Turn the clearance sonar main switch on. Select the item below in the DATA LIST, and read its value displayed on the intelligent tester. DATA LIST: AFS ECU DATA LIST: AFS ECU REFERENCE Item Measurement / Range (Display) Normal Condition Diagnostic Note AFS OFF SW AFS ON / OFF setting OFF: AFS OFF ON: AFS ON - OK : REPLACE AFS ECU NG: Go To Next Step
4. PERFORM SATELLITE SWITCH Check operation speed and tach indicator system. OK: Tach indicator system operates normally. NG : GO TO COMBINATION METER SYSTEM OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

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1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL (for Discharge Headlight)
2. REMOVE COOL AIR INTAKE DUCT SEAL (See «REMOVAL»(ref-235598-S24774280692006062400000) )
3. REMOVE FRONT BUMPER ASSEMBLY (See «REMOVAL»(ref-235598-S24774280692006062400000) )
4. REMOVE FRONT BUMPER ENERGY ABSORBER (See «DISASSEMBLY»(ref-235598-S00464606222006062400000) )
5. REMOVE ENGINE ROOM SIDE COVER Using a clip remover, remove the 4 clips. Disengage the nut and remove the engine room side cover.
6. REMOVE FRONT UPPER FENDER PROTECTOR Disengage the 2 claws and 3 clips and remove the front upper fender protector.
7. REMOVE HEADLIGHT ASSEMBLY Disconnect the connector as shown in the illustration. Remove the 3 bolts. Disengage the headlight bracket pin and remove the headlight assembly.

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1. REMOVE NO. 1 HEADLIGHT BULB (for Halogen Headlight) Remove the headlight socket cover as shown in the illustration. Remove the headlight gasket. NOTE: After the headlight gasket is removed, be sure to replace it with a new one. Failure to do this may cause water ingress. Disconnect the connector. Remove the No. 1 headlight bulb as shown in the illustration.
2. REMOVE DISCHARGE HEADLIGHT BULB (for Discharge Headlight) Remove the headlight socket cover as shown in the illustration. Remove the headlight gasket. NOTE: After the headlight gasket is removed, be sure to replace it with a new one. Failure to do this may cause water ingress. Separate the light control ECU socket as shown in the illustration. Release the set spring and remove the discharge headlight bulb as shown in the illustration.
3. REMOVE NO. 2 HEADLIGHT BULB Remove the headlight socket cover as shown in the illustration. Remove the headlight gasket. NOTE: After the headlight gasket is removed, be sure to replace it with a new one. Failure to do this may cause water ingress. Disconnect the connector. Remove the No. 2 headlight bulb as shown in the illustration.
4. REMOVE PARKING LIGHT BULB Turn the parking light bulb and the parking light socket in the direction indicated by the arrow and remove them as a unit. Remove the parking light bulb from the parking light socket.
5. REMOVE PARKING LIGHT SOCKET Disconnect the connector and remove the parking light socket.
6. REMOVE FRONT TURN SIGNAL LIGHT BULB Turn the front turn signal light bulb and the front turn signal lights socket in the direction indicated by the arrow and remove them as a unit. Turn the 2 front turn signal light bulbs and the 2 front turn signal light sockets in the direction indicated by the arrow and remove them as a unit. Remove the 2 front turn signal light bulbs from the 2 front turn signal light sockets.
7. REMOVE HEADLIGHT WIRE HARNESS Disconnect the connector and remove the headlight wire harness.
8. REMOVE FRONT BUMPER SIDE SUPPORT Remove the 3 screws and front bumper side support.
9. REMOVE HEADLIGHT LEVELING MOTOR (for Discharge Headlight) Align the notches of the headlight leveling motor and the housing, and pull out the headlight leveling motor slightly. Lower the tip of the headlight leveling motor to disengage it from the reflector and remove the headlight leveling motor.
10. REMOVE HEADLIGHT LEVELING MOTOR BASE PACKING Remove the headlight leveling motor base packing. NOTE: After the headlight leveling motor base packing is removed, be sure to replace it with a new one. Failure to do this may cause water ingress.
11. REMOVE HEADLIGHT SWIVEL MOTOR (for Discharge Headlight) Remove the screw and headlight protector. Remove the 4 screws. Install a drill bit into a drill. Wrap the drill bit of the drill with tape. HINT: Tape is used to prevent drilling too deeply into the headlight unit. Press the drill lightly against the point shown by the arrow and drill into the headlight unit. Using a file, enlarge the hole in the headlight using the groove as a guideline. Remove the 3 screws. Disconnect the connector and remove the washer and headlight swivel motor.
12. REMOVE LIGHT CONTROL ECU SUB-ASSEMBLY (for Discharge Headlight) Disconnect the connector and remove the light control ECU sub-assembly. NOTE: The light control ECU sub-assembly cannot be removed unless the headlight swivel motor is removed.
13. REMOVE HEADLIGHT GASKET Remove the headlight gasket. NOTE: After the headlight gasket is removed, be sure to replace it with a new one. Failure to do this may cause water ingress.

Scheme 165

Scheme 166

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Scheme 169

1. VEHICLE PREPARATION FOR HEADLIGHT AIM ADJUSTMENT Prepare the vehicle: Ensure there is no damage or deformation to the body around the headlights. Fill the fuel tank. Make sure that the oil is filled to the specified level. Make sure that the coolant is filled to the specified level. Inflate the tires to the appropriate pressure. Place the spare tire, tools, and jack in their original positions. Unload the trunk. Sit a person of average weight (68 kg, 150 lb) in the driver's seat.
2. PREPARATION FOR HEADLIGHT AIMING (Using a tester) Prepare the vehicle for headlight aim check. Adjust in accordance with headlight tester instructions.
3. PREPARATION FOR HEADLIGHT AIMING (Using a screen) Prepare the vehicle according to the following conditions: Place the vehicle in a location that is dark enough to clearly observe the cutoff line. The cutoff line is a distinct line, below which light from the headlights can be observed and above which it cannot. Place the vehicle at a 90° angle to the wall. Create a 7.62 m (25 ft) distance between the vehicle (headlight bulb center) and the wall. Place the vehicle on a level surface. Bounce the vehicle up and down to settle the suspension. NOTE: A distance of 7.62 m (25 ft) between the vehicle (headlight bulb center) and the wall is necessary for proper aim adjustment. If unavailable, secure a distance of exactly 3 m (9.84 ft) for check and adjustment. (The target zone will change with the distance, so follow the instructions in the illustration.) Prepare a piece of thick white paper (approximately 2 m (6.6 ft) (height) x 4 m (13.1 ft) (width)) to use as a screen. Draw a vertical line down the center of screen (V line). Set the screen as shown in the illustration. HINT: Stand the screen perpendicular to the ground. Align the V line on the screen with the center of the vehicle. Draw base lines (H line, V LH, V RH lines) on the screen as shown in the illustration. HINT: The base lines differ for "low-beam inspection" and "high-beam inspection." Mark the headlight bulb center marks on the screen. If the center mark cannot be observed on the headlight, use the center of the headlight bulb or the manufacturer's name marked on the headlight as the center mark. H Line (Headlight height): Draw a horizontal line across the screen so that it passes through the center marks. The H line should be at the same height as the headlight bulb center marks of the low-beam headlights. V LH Line, V RH Line (Center mark position of left- hand (LH) and right-hand (RH) headlights): Draw two vertical lines so that they intersect the H line at each center mark (aligned with the center of the low-beam headlight bulbs).
4. HEADLIGHT AIMING INSPECTION Cover or disconnect the connector of the headlight on the opposite side to prevent light from the headlight not being inspected from affecting headlight aiming inspection. NOTE: Do not keep the headlight covered for more than 3 minutes. The headlight lens is made of synthetic resin, and may easily melt or be damaged due to heat. HINT: When checking the aim of the high-beam, cover the low-beam or disconnect the connector. Start the engine. Turn on the headlight and make sure that the cutoff line falls within the specified area, as shown in the illustration. HINT: Since the low-beam light and the high-beam light are a unit, if the aim on one is correct, the other should also be correct. However, check both beams just to make sure. Alignment distance is 7.62 m (25 ft): The cutoff line is 101 mm (3.97 in.) above and below the H line as well as left and right of the V line with low-beam (SAE J599). Alignment distance is 3 m (9.84 ft): The cutoff line is 40 mm (1.57 in.) above and below the H line as well as left and right of the V line with low-beam (SAE J599). Alignment distance is 7.62 m (25 ft): The cutoff line is 101 mm (3.97 in.) above and below the H line as well as left and right of the V line with high-beam (SAE J599). Alignment distance is 3 m (9.84 ft): The cutoff line is 40 mm (1.57 in.) above and below the H line as well as left and right of the V line with high-beam (SAE J599). Alignment distance is 7.62 m (25 ft): The cutoff line is 53 mm (2.08 in.) below the H line with low-beam. Alignment distance is 3 m (9.84 ft): The cutoff line is 21 mm (0.82 in.) below the H line with low-beam.
5. HEADLIGHT AIMING ADJUSTMENT Adjust the aim vertically: Adjust the headlight aim into the specified range by turning aiming screw with a screwdriver. NOTE: The final turn of the aiming screw should be made in the clockwise direction. If the screw is tightened excessively, loosen it and then retighten it, so that the final turn of the screw is in the clockwise direction. HINT: Perform low-beam aim adjustment. The headlight aim moves up when turning the aiming screw clockwise, and moves down when turning the aiming screw counterclockwise.

Scheme 170

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Scheme 176

1. INSTALL HEADLIGHT GASKET Install a new headlight gasket. NOTE: After the headlight gasket is removed, be sure to replace it with a new one. Failure to do this may cause water ingress.
2. INSTALL LIGHT CONTROL ECU SUB-ASSEMBLY (for Discharge Headlight) Connect the connector. Install the light control ECU sub-assembly.
3. INSTALL HEADLIGHT SWIVEL MOTOR (for Discharge Headlight) Connect the connector. Install the headlight swivel motor with the 3 screws and washer. Install a new grommet to the headlight unit. HINT: Use the new grommet that is supplied with a new headlight swivel motor. Install the 4 screws. Install the headlight protector with the screw.
4. INSTALL HEADLIGHT LEVELING MOTOR BASE PACKING Install a new headlight leveling motor base packing. NOTE: After the headlight leveling motor base packing is removed, be sure to replace it with a new one. Failure to do this may cause water ingress.
5. INSTALL HEADLIGHT LEVELING MOTOR (for Discharge Headlight) Engage the tip of the headlight leveling motor with the reflector. Turn the headlight leveling motor to install it.
6. INSTALL FRONT BUMPER SIDE SUPPORT Install the front bumper side support with the 3 screws.
7. INSTALL HEADLIGHT WIRE HARNESS Connect the connector and install the headlight wire harness.
8. INSTALL FRONT TURN SIGNAL LIGHT BULB Install the 2 front turn signal light bulbs.
9. INSTALL PARKING LIGHT SOCKET Connect the connector and install the parking light socket.
10. INSTALL PARKING LIGHT BULB Install the parking light bulb.
11. INSTALL NO. 2 HEADLIGHT BULB Install the No. 2 headlight bulb. Install a new headlight gasket. NOTE: After the headlight gasket is removed, be sure to replace it with a new one. Failure to do this may cause water ingress.
12. INSTALL DISCHARGE HEADLIGHT BULB (for Discharge Headlight) Install the discharge headlight bulb. Install a new headlight gasket. NOTE: After the headlight gasket is removed, be sure to replace it with a new one. Failure to do this may cause water ingress.
13. INSTALL NO. 1 HEADLIGHT BULB (for Halogen Headlight) Install the No. 1 headlight bulb. Install a new headlight gasket. NOTE: After the headlight gasket is removed, be sure to replace it with a new one. Failure to do this may cause water ingress.

Scheme 177

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Scheme 179

1. INSTALL HEADLIGHT ASSEMBLY Install the headlight assembly with the headlight bracket pin. Install the 3 bolts. Connect the connector.
2. INSTALL FRONT UPPER FENDER PROTECTOR Install the front upper fender protector with the 2 claws and 3 clips.
3. INSTALL ENGINE ROOM SIDE COVER Install the engine room side cover with the nut. Install the 4 clips.
4. INSTALL FRONT BUMPER ENERGY ABSORBER
5. INSTALL FRONT BUMPER ASSEMBLY
6. INSTALL COOL AIR INTAKE DUCT SEAL
7. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL (for Discharge Headlight)
8. VEHICLE PREPARATION FOR HEADLIGHT AIM ADJUSTMENT (See «ADJUSTMENT»(ref-235577-S25613627832006062400000) )
9. PREPARATION FOR HEADLIGHT AIMING (Using a tester) (See «ADJUSTMENT»(ref-235577-S25613627832006062400000) )
10. PREPARATION FOR HEADLIGHT AIMING (Using a screen) (See «ADJUSTMENT»(ref-235577-S25613627832006062400000) )
11. HEADLIGHT AIMING INSPECTION (See «ADJUSTMENT»(ref-235577-S25613627832006062400000) )
12. HEADLIGHT AIMING ADJUSTMENT (See «ADJUSTMENT»(ref-235577-S25613627832006062400000) )
13. PERFORM INITIALIZATION (for Discharge Headlight) Some systems need initialization after reconnecting the cable to the negative battery terminal (See «INITIALIZATION»(ref-235541-S32349848442006062400000) ).

Scheme 180

Scheme 181

1. INSTALL HEADLIGHT PROTECTOR RETAINER HINT: If the installation area of the headlight assembly is damaged, use the supply retainer for low-cost repair. Ensure that the headlight assembly is not damaged. Cut off the part shaded in the illustration and sand smooth with sandpaper. NOTE: After cutting off the part, place the headlight protector retainer against the bosses and gradually file away the old bracket if it interferes with the installation of the supply retainer. Install the headlight protector retainer with the 2 screws.

Scheme 182

Scheme 183

Scheme 184

Scheme 185

1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
2. REMOVE COOL AIR INTAKE DUCT SEAL (See «REMOVAL»(ref-235598-S24774280692006062400000) )
3. REMOVE ENGINE ROOM SIDE COVER (See «REMOVAL»(ref-235577-S11833950792006062400000) )
4. REMOVE WASHER HOSE Remove the bolt and washer hose.
5. REMOVE DISCHARGE HEADLIGHT BULB Remove the headlight socket cover as shown in the illustration. Remove the headlight gasket. NOTE: After the headlight gasket is removed, be sure to replace it with a new one. Failure to do this may cause water ingress.
6. Separate the light control ECU socket as shown in the illustration.
7. Release the set spring and remove the discharge headlight bulb as shown in the illustration.

Scheme 186

Note. After the discharge headlight bulb is replaced, make sure that it comes on. Then, reinstall all the parts that were removed to replace the bulb.

Scheme 187

1. INSTALL DISCHARGE HEADLIGHT BULB Install the discharge headlight bulb. NOTE: After the discharge headlight bulb is replaced, make sure that it comes on. Then, reinstall all the parts that were removed to replace the bulb. Install a new headlight gasket. NOTE: After the headlight gasket is removed, be sure to replace it with a new one. Failure to do this may cause water ingress.
2. INSTALL WASHER HOSE Install the washer hose with the bolt. Torque: 5.5 N*m (56 kgf*cm, 49 in.*lbf)
3. INSTALL ENGINE ROOM SIDE COVER (See «INSTALLATION»(ref-235577-S13931205562006062400000) )
4. INSTALL COOL AIR INTAKE DUCT SEAL
5. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL
6. PERFORM INITIALIZATION Some systems need initialization after reconnecting the cable to the negative battery terminal (See «INITIALIZATION»(ref-235541-S32349848442006062400000) ).

Scheme 188

Scheme 189

Scheme 190

1. REMOVE COOL AIR INTAKE DUCT SEAL (See «REMOVAL»(ref-235598-S24774280692006062400000) )
2. REMOVE FRONT BUMPER ASSEMBLY (See «REMOVAL»(ref-235598-S24774280692006062400000) )
3. REMOVE FOG LIGHT ASSEMBLY Disengage the clamp. Disengage the 3 pins and remove the bolt and fog light assembly.

Scheme 191

1. REMOVE FOG LIGHT BULB Remove the fog light bulb as shown in the illustration.

Scheme 192

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1. VEHICLE PREPARATION FOR FOG LIGHT AIM Prepare the vehicle: Ensure there is no damage or deformation to the body around the fog lights. Fill the fuel tank. Make sure that the oil is filled to the specified level. Make sure that the coolant is filled to the specified level. Inflate the tires to the appropriate pressure. Place the spare tire, tools, and jack in their original positions. Unload the trunk. Sit a person of average weight (68 kg, 150 lb) in the driver's seat.
2. PREPARATION FOR FOG LIGHT AIMING Prepare the vehicle according to the following conditions: Place the vehicle in a location that is dark enough to clearly observe the cutoff line. The cutoff line is a distinct line, below which light from the fog lights can be observed and above which it cannot. Place the vehicle at a 90° angle to the wall. Create a 7.62 m (25 ft) distance between the vehicle (fog light bulb center) and the wall. Place the vehicle on a level surface. Bounce the vehicle up and down to settle the suspension. NOTE: A distance of 7.62 m (25 ft) between the vehicle (fog light bulb center) and the wall is necessary for proper aim adjustment. If unavailable, secure a distance of exactly 3 m (9.84 ft) for check and adjustment. (The target zone will change with the distance, so follow the instructions in the illustration.) Prepare a piece of thick white paper (approximately 2 m (6.6 ft) (height) x 4 m (13.1 ft) (width)) to use as a screen. Draw a vertical line down the center of screen (V line). Set the screen as shown in the illustration. HINT: Stand the screen perpendicular to the ground. Align the V line on the screen with the center of the vehicle. Draw base lines (H line, V LH, V RH lines) on the screen as shown in the illustration. HINT: Mark the fog light bulb center marks on the screen. If the center mark cannot be observed on the fog light, use the center of the fog light bulb or the manufacturer's name marked on the fog light as the center mark. H Line (Fog light height): Draw a horizontal line across the screen so that it passes through the center marks. The H line should be at the same height as the fog light bulb center marks of the low-beam fog lights. V LH Line, V RH Line (Center mark position of left-hand (LH) and right-hand (RH) fog lights): Draw two vertical lines so that they intersect the H line at each center mark.
3. FOG LIGHT AIMING INSPECTION Cover or disconnect the connector of the fog light on the opposite side to prevent light from the fog light not being inspected from affecting fog light aiming inspection. Start the engine. Turn on the fog light and make sure that the cutoff line falls within the specified area, as shown in the illustration.
4. FOG LIGHT AIMING ADJUSTMENT Adjust the fog light aim into the specified range by turning aiming screw with a screwdriver. NOTE: The final turn of the aiming screw should be made in the clockwise direction. If the screw is tightened excessively, loosen it and then retighten it, so that the final turn of the screw is in the clockwise direction.