Lighting (Diagnostics - Introduction): Diagnosis Lexus RX III

HOW TO PROCEED WITH TROUBLESHOOTING

HINT

1. Use the following procedure to troubleshoot the lighting system.
2. *: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP NEXT: Go to next step
2. CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK NEXT: Go to next step
3. INSPECT BATTERY VOLTAGE Standard Voltage 11 to 14 V If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step. NEXT: Go to next step
4. INSPECT CAN COMMUNICATION SYSTEM* Use the Techstream to check if the CAN communication system is functioning normally. Result Result Proceed to CAN communication system DTC is not output. A CAN communication system DTC is output. B B --> GO TO APPROPRIATE CAN COMMUNICATION SERVICE INFORMATION A: Go to next step
5. CHECK FOR DTC* Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-400862-S13993873942011051800000) . Result Result Proceed to DTC is not output. A DTC is output. B B --> Go to step 8 . A: Go to next step
6. PROBLEM SYMPTOMS TABLE Refer to Problem Symptoms Table. Refer to «PROBLEM SYMPTOMS TABLE»(ref-400862-S31953522912011051800000) . Result Result Proceed to Fault is not listed in Problem Symptoms Table. A Fault is listed in Problem Symptoms Table. B B --> Go to step 8 . A: Go to next step
7. OVERALL ANALYSIS AND TROUBLESHOOTING* Data List / Active Test. Refer to «DATA LIST / ACTIVE TEST»(ref-400862-S28375872172011051800000) Terminals of ECU. Refer to «TERMINALS OF ECU»(ref-400862-S17293673192011051800000) NEXT: Go to next step
8. ADJUST, REPAIR OR REPLACE NEXT: Go to next step
9. CONFIRMATION TEST NEXT --> END

HINT

1. Use the following procedure to troubleshoot the lighting system.
2. *: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP NEXT: Go to next step
2. CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK NEXT: Go to next step
3. INSPECT BATTERY VOLTAGE Standard Voltage 11 to 14 V If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step. NEXT: Go to next step
4. INSPECT CAN COMMUNICATION SYSTEM* Use the Techstream to check if the CAN communication system is functioning normally. Result Result Proceed to CAN communication system DTC is not output. A CAN communication system DTC is output. B B --> GO TO APPROPRIATE CAN COMMUNICATION SERVICE INFORMATION A: Go to next step
5. CHECK FOR DTC* Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-400862-S13993873942011051800000) . Result Result Proceed to DTC is not output. A DTC is output. B B --> Go to step 8 . A: Go to next step
6. PROBLEM SYMPTOMS TABLE Refer to Problem Symptoms Table. Refer to «PROBLEM SYMPTOMS TABLE»(ref-400862-S10379234372011051800000) . Result Result Proceed to Fault is not listed in Problem Symptoms Table. A Fault is listed in Problem Symptoms Table. B B --> Go to step 8 . A: Go to next step
7. OVERALL ANALYSIS AND TROUBLESHOOTING* Data List / Active Test. Refer to «DATA LIST / ACTIVE TEST»(ref-400862-S28375872172011051800000) Terminals of ECU. Refer to «TERMINALS OF ECU»(ref-400862-S17293673192011051800000) NEXT: Go to next step
8. ADJUST, REPAIR OR REPLACE NEXT: Go to next step
9. CONFIRMATION TEST NEXT --> END

Scheme 150

Scheme 151

Scheme 152

Scheme 153

1. AUTOMATIC LIGHT CONTROL SYSTEM OPERATION CHECK Turn the engine switch to on (IG). Turn the light control switch to the AUTO position. Cover the automatic light control sensor. Check that the taillights and low beam headlights come on. Uncover the automatic light control sensor. Check that the low beam headlights and taillights go off.
2. LIGHT AUTO TURN-OFF SYSTEM OPERATION CHECK When only the taillights are on. Close the driver side door. Turn the engine switch on (IG). Turn the light control switch to the tail position. Turn the engine switch off. Open the driver side door. Check that the taillights go off immediately. When low beam headlights are on. Close all of the doors. Turn the engine switch on (IG). Turn the low beam headlights, high beam headlights or front fog lights on. Turn the engine switch off. Open any door. Close all of the doors. Check that all of the lights go off after 30 seconds (delay function). HINT: Before the lights go off, if the lock button on the key is pushed after all of the doors are locked, all of the lights will go off immediately.
3. DAYTIME RUNNING LIGHT SYSTEM OPERATION CHECK Turn the light control switch off (w/o DRL OFF switch). Turn the light control switch to tail position (w/ DRL OFF switch). Start the engine. Release the parking brake. Check that the daytime running lights come on.
4. HID HEADLIGHT SYSTEM OPERATION CHECK Perform the following diagnosis procedure when both of the following conditions are met: 1) the light control ECU is not visibly damaged, and 2) the light control ECU has been struck but is operating normally. If all of the following diagnosis results are normal, the light control ECU can be reused. Perform low beam headlight cold starts (10 minutes or more off, then turned on) and hot starts (15 minutes or more on, 1 minute off, then turned on again) several times. Check that the low beam headlights illuminate normally. For 5 minutes immediately after the lights are started cold (before the lights stabilize), visually check the illumination condition and check that the lights do not flicker or show signs of instability. Install bulbs that have approximately the same usage time, and illuminate the low beam headlights for approximately 30 seconds. Check that the brightness of the left and right bulbs are approximately the same, and that the illumination is stable.
5. AUTOMATIC HIGH BEAM SYSTEM OPERATION CHECK Check the operation of the inner rear view mirror assembly indicator light. Turn the engine switch on (IG). Check that the inner rear view mirror assembly indicator light comes on. Press the inner rear view mirror assembly AUTO switch once. Check that the inner rear view mirror assembly indicator light goes off. Press the inner rear view mirror assembly AUTO switch once again. Check that the inner rear view mirror assembly indicator light comes on. HINT: If the inner rear view mirror assembly indicator light flashes, turn the engine switch off, then turn the engine switch on (IG). If the inner rear view mirror assembly indicator light flashes continuously, replace the inner rear view mirror assembly. Check the operation of the automatic high beam indicator light. Turn the engine switch on (IG). Move the shift lever to any position except R. Turn the light control switch to the AUTO position. Cover the automatic light control sensor to turn the low beam headlights on. Turn the dimmer switch to the high position. Check that the automatic high beam indicator comes on. Check the operation of the automatic high beam function. At night, when driving the vehicle with the automatic high beam system in standby mode, check that the headlights are changed from low beams to high beams automatically after a short delay when all of the following conditions are met: Vehicle speed is more than 34 km/h (21 mph). The area in front of the vehicle is dark. There are no oncoming vehicles with headlights on. There are no preceding vehicles with taillights on. There are few streetlights along the street ahead. At night, when driving the vehicle with the high beams are turned on by the automatic high beam system, check that the automatic high beam system turns off the high beams and returns to standby mode when any of the following conditions are met: Vehicle speed is less than 27 km/h (17 mph). The level of ambient light is higher than a specified threshold. There are oncoming vehicles with headlights on. There are preceding vehicles with taillights on. Light from streetlights ahead is higher than a specified threshold. Using the following procedure, the automatic high beam operation can be checked without driving the vehicle. Connect terminals 4 (CG) and 8 (LVL) of the DLC3 using SST. SST: 09843-18040 Turn the engine switch on (IG). Disconnect SST within 10 seconds after turning the engine switch on (IG). After more than 1 second and less than 10 seconds, connect terminals 4 (CG) and 8 (LVL) of the DLC3 using SST again. Check that the inner rear view mirror assembly indicator light flashes. Check that the low beams change to high beams, when the surrounding area is dark enough. Shine a flashlight, white LED or red LED on the camera built into the inner rear view mirror assembly. Check that the high beams change to low beams. NOTE: The high beams may not change to low beams when the surrounding area is bright or due to on other lighting conditions. Therefore, this function check should not be used as the only method of determining if a malfunction is present (if parts need to be replaced).
6. AFS OPERATION CHECK Check that the initialization (determination of the initial position) of the leveling motor and swivel motor is performed after the engine is started. Check that the AFS OFF indicator light in the combination meter assembly comes on for approximately 3 seconds and then goes off when the engine switch is turned on (IG).
7. DOOR MIRROR FOOT LIGHT SYSTEM OPERATION CHECK The operation and condition of this control are described below. Operation Condition Illuminate for 15 seconds, and then fade out When any of the following conditions is met, the lights illuminate for 15 seconds, and then fade out: The key enters any actuation area around the doors when the engine switch is off and all doors are closed*1. Any door is unlocked when the engine switch is off, all doors are closed and locked. Either driver door control switch or front passenger door control switch is turned to unlock position when engine switch is on (IG) and shift lever is in P. Fade out immediately When any of the following conditions is met, the lights fade out immediately: The engine switch is turned from off to on (ACC) when all doors are closed. All doors are locked when the engine switch is off, all doors are closed and any door is unlocked. All doors are locked again when all doors are closed and locked. The shift lever is moved to any position other than P when the engine switch is on (IG). HINT: *1: When the lights are on, if the key leaves the actuation areas around the doors, after approximately 3 seconds, the door mirror foot lights fade out.

PROBLEM SYMPTOMS TABLE

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.

HEADLIGHT AND TAILLIGHT (FOR HALOGEN HEADLIGHT)

HEADLIGHT AND TAILLIGHT (FOR HID HEADLIGHT)

STOP LIGHT

FRONT FOG LIGHT

BACK-UP LIGHT

TURN SIGNAL LIGHT

HAZARD WARNING LIGHT

AUTOMATIC LIGHT CONTROL SYSTEM

LIGHT AUTO TURN-OFF SYSTEM

DAYTIME RUNNING LIGHT SYSTEM

AUTOMATIC HIGH BEAM SYSTEM

HINT

*1: Camera detection malfunctions can be detected using the Techstream. Under the following conditions, if the camera built into the inner rear view mirror assembly cannot detect other vehicles or lights correctly, it will stop automatic high beam control and turn off the automatic high beam indicator light

1. When the front windshield is not clear (ice, snow or frost on the glass).

1. When the front windshield is dirty (sand, mud, water stains or bugs are on the glass).

*2: Aiming misalignment of the camera can be detected using the Techstream. Under the following conditions, the camera built in to the rear view mirror assembly cannot adjust its center point

1. When the inner rear view mirror assembly is on an angle due to mis-installation or damage to the camera.

1. When the automatic aiming adjusting function of the mirror does not work correctly.

If the camera aiming is misaligned, check the following conditions

1. Check if the vehicle is inclined.

1. Check if the windshield glass is installed correctly.

1. Check if the inner rear view mirror assembly is installed correctly.

1. Check if there is deformation of the camera or stay of the inner rear view mirror assembly.

AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM

Note. Initialize the AFS ECU (headlight swivel ECU assembly) when the AFS ECU (headlight swivel ECU assembly) is replaced. If the vehicle is not equipped with air suspension system, initialize the AFS ECU (headlight swivel ECU assembly) (set the zero point of the height control sensor in the AFS ECU (headlight swivel ECU assembly)) after the vehicle height changes due to replacement of suspension components or after performing such operations as removal and reinstallation or replacement of the rear height control sensor sub-assembly RH.

AFS

Note. Initialize the AFS ECU (headlight swivel ECU assembly) when the AFS ECU (headlight swivel ECU assembly) is replaced.

DOOR MIRROR FOOT LIGHT

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.

HEADLIGHT AND TAILLIGHT (FOR HALOGEN HEADLIGHT)

HEADLIGHT AND TAILLIGHT (FOR HID HEADLIGHT)

STOP LIGHT

FRONT FOG LIGHT

BACK-UP LIGHT

TURN SIGNAL LIGHT

HAZARD WARNING LIGHT

AUTOMATIC LIGHT CONTROL SYSTEM

LIGHT AUTO TURN-OFF SYSTEM

DAYTIME RUNNING LIGHT SYSTEM

AUTOMATIC HIGH BEAM SYSTEM

HINT

*1: Camera detection malfunctions can be detected using the Techstream. Under the following conditions, if the camera built into the inner rear view mirror assembly cannot detect other vehicles or lights correctly, it will stop automatic high beam control and turn off the automatic high beam indicator light

1. When the front windshield is not clear (ice, snow or frost on the glass).

1. When the front windshield is dirty (sand, mud, water stains or bugs are on the glass).

*2: Aiming misalignment of the camera can be detected using the Techstream. Under the following conditions, the camera built in to the rear view mirror assembly cannot adjust its center point

1. When the inner rear view mirror assembly is on an angle due to mis-installation or damage to the camera.

1. When the automatic aiming adjusting function of the mirror does not work correctly.

If the camera aiming is misaligned, check the following conditions

1. Check if the vehicle is inclined.

1. Check if the windshield glass is installed correctly.

1. Check if the inner rear view mirror assembly is installed correctly.

1. Check if there is deformation of the camera or stay of the inner rear view mirror assembly.

AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM

Note. Initialize the AFS ECU (headlight swivel ECU assembly) when the AFS ECU (headlight swivel ECU assembly) is replaced. If the vehicle is not equipped with air suspension system, initialize the AFS ECU (headlight swivel ECU assembly) (set the zero point of the height control sensor in the AFS ECU (headlight swivel ECU assembly)) after the vehicle height changes due to replacement of suspension components or after performing such operations as removal and reinstallation or replacement of the rear height control sensor sub-assembly RH.

AFS

Note. Initialize the AFS ECU (headlight swivel ECU assembly) when the AFS ECU (headlight swivel ECU assembly) is replaced.

DOOR MIRROR FOOT LIGHT

Scheme 154

Scheme 155

Scheme 156

Scheme 157

Scheme 158

1. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Disconnect the 2A, 2D, 2F, 2K and F14 instrument panel junction block assembly and main body ECU (multiplex network body ECU) connectors. Measure the voltage according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition 2A-17 - Body ground GR - Body ground ACC power supply Engine switch on (ACC) 11 to 14 V Engine switch off Below 1 V 2A-20 - Body ground G - Body ground IG power supply Engine switch on (IG) 11 to 14 V Engine switch off Below 1 V 2F-40 (BECU)- Body ground G - Body ground Battery power supply Always 11 to 14 V 2K-1 - Body ground W - Body ground Battery power supply Always 11 to 14 V If the result is not as specified, there may be a malfunction in the wire harness. Measure the resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition 2D-6 (GND1) - Body ground BR - Body ground Ground Always Below 1 ohms F14-3 (GND2) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction in the wire harness. Reconnect the 2A, 2D, 2F, 2K and F14 instrument panel junction block assembly and main body ECU (multiplex network body ECU) connectors. Measure the voltage or check for pulses according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition 2D-26 (FRCY) - Body ground L - Body ground Front door courtesy light switch RH input Front door RH open Below 1 V Front door RH closed 11 to 14 V 2F-19 (DRL)*1 - Body ground LG - Body ground Daytime running light system drive output Daytime running light system operates Below 1 V Daytime running light system not operates 11 to 14 V 2F-20 (DIM) - Body ground G - Body ground High beam headlights drive output Dimmer switch in high or high flash position Below 1 V Dimmer switch in low position 11 to 14 V 2F-32 (PKB) - Body ground LG - Body ground Parking brake switch input Parking brake switch on Below 1 V Parking brake switch off 11 to 14 V 2F-37 (HRLY) - Body ground B - Body ground Headlight relay drive output Light control switch in head position Below 1 V Light control switch not in head position 11 to 14 V 2H-26 (FLCY) - Body ground B - Body ground Front door courtesy light switch LH input Front door LH open Below 1 V Front door LH closed 11 to 14 V 2H-27 (LSWL) - Body ground Y - Body ground Rear door unlock detection switch LH input Rear door LH locked Pulse generation Rear door LH unlocked Below 1 V F12-3 (LCTY) - Body ground L - Body ground Rear door courtesy light switch LH input Rear door LH open Below 1 V Rear door LH closed 11 to 14 V F13-6 (RCTY) - Body ground GR - Body ground Rear door courtesy light switch RH input Rear door RH open Below 1 V Rear door RH closed 11 to 14 V F13-7 (LSFL) - Body ground P - Body ground Front door unlock detection switch LH input Front door LH locked Pulse generation Front door LH unlocked Below 1 V F13-8 (HF) - Body ground Y - Body ground Dimmer switch high flash position signal input Dimmer switch in high flash position Below 1 V Dimmer switch not in high flash position Pulse generation F13-18 (LSFR) - Body ground SB - Body ground Front door unlock detection RH switch input Front door RH locked Pulse generation Front door RH unlocked Below 1 V F13-19 (BCTY)*2 - Body ground R - Body ground Back door courtesy light switch input Back door open Below 1 V Back door closed 11 to 14 V F13-20 (CLTB) - Body ground L - Body ground Automatic light control sensor power supply output Engine switch off Below 1 V Engine switch on (IG) and light control switch in AUTO position 11 to 14 V F13-21 (CLTS) - Body ground B - Body ground Automatic light control sensor signal input Engine switch off Below 1 V Automatic light control system operates Pulse generation (See waveform 1 (Scheme 155) ) F13-27 (FFOG) - Body ground P - Body ground Front fog light switch input Front fog light switch on Below 1 V Front fog light switch off Pulse generation F13-28 (A) - Body ground BR - Body ground Light control switch AUTO position signal input Light control switch in AUTO position Below 1 V Light control switch not in AUTO position Pulse generation F13-29 (HEAD) - Body ground SB - Body ground Light control switch head position input Light control switch in head position Below 1 V Light control switch not in head position and engine switch off Pulse generation Light control switch not in head position and engine switch on (IG) 11 to 14 V F13-30 (TAIL) - Body ground V - Body ground Light control switch tail position signal input Light control switch in tail or head position Below 1 V Light control switch in neither tail nor head position, and engine switch off Pulse generation Light control switch in neither tail nor head position, and engine switch on (IG) 11 to 14 V F14-2 (LSWR) - Body ground B - Body ground Rear door unlock detection switch RH input Rear door RH locked Pulse generation Rear door RH unlocked Below 1 V HINT: *1: w/ Daytime Running Light *2: w/o Power Back Door If the result is not as specified, the main body ECU (multiplex network body ECU) or instrument panel junction block assembly may have a malfunction. Waveform 1 Item Content Tool setting 5 V/DIV., 5 ms./DIV. HINT: If the ambient light becomes brighter, width A becomes narrower.
2. CHECK AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY) Disconnect the A53 AFS ECU (headlight swivel ECU assembly) connector. Measure the resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition A53-22 (E1) - Body ground W-B - Body ground AFS ECU (headlight swivel ECU assembly) ground Always Below 1 ohms If the result is not as specified, there may be a malfunction in the wire harness. Measure the voltage according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition A53-14 (IGS)*1 - Body ground LG - Body ground Swivel motor power supply Engine switch off Below 1 V Engine switch on (IG) 11 to 14 V A53-15 (IG) - Body ground V - Body ground AFS ECU (headlight swivel ECU assembly) power supply Engine switch off Below 1 V Engine switch on (IG) 11 to 14 V If the result is not as specified, there may be a malfunction in the wire harness. Reconnect the A53 AFS ECU (headlight swivel ECU assembly) connector. Measure the resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition A53-21 (SGR) - A53-22 (E1) P*1 - W-B B*2 - W-B Rear height control sensor ground Always Below 1 ohms A53-23 (SMGL)*1 - A53-22 (E1) BR - W-B Swivel motor LH ground Always Below 1 ohms A53-24 (SMGR)*1 - A53-22 (E1) B - W-B Swivel motor RH ground Always Below 1 ohms A53-27 (LH-) - A53-22 (E1) BE - W-B Leveling motor LH ground Always Below 1 ohms A53-28 (RH-) - A53-22 (E1) LG - W-B Leveling motor RH ground Always Below 1 ohms If the result is not as specified, the AFS ECU (headlight swivel ECU assembly) may have a malfunction. Measure the voltage or check for pulses according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition A53-1 (SMBL)*1 - A53-22 (E1) GR - W-B Swivel motor LH power supply Engine switch off Below 1 V Engine switch on (IG) 11 to 16 V A53-2 (SMBR)*1 - A53-22 (E1) R - W-B Swivel motor RH power supply Engine switch off Below 1 V Engine switch on (IG) 11 to 16 V A53-3 (LHT) - A53-22 (E1) W - W-B Leveling motor LH power supply Engine switch off Below 1 V Engine switch on (IG) 11 to 16 V A53-4 (RHT) - A53-22 (E1) B - W-B Leveling motor RH power supply Engine switch off Below 1 V Engine switch on (IG) 11 to 16 V A53-7 (INIT) - A53-22 (E1) V - W-B Initialization signal Engine switch on (IG), terminals LVL and GND of DLC3 connected Below 1 V Engine switch on (IG), terminals LVL and GND of DLC3 not connected Approx. 5 V A53-10 (SMR)*1 - A53-22 (E1) L - W-B Swivel motor RH LIN communication Engine switch off Below 1 V Engine switch on (IG) Pulse generation A53-11 (RH+) - A53-22 (E1) V - W-B Leveling motor RH LIN communication Engine switch off Below 1 V Engine switch on (IG) Pulse generation A53-12 (CANH) - A53-22 (E1) B - W-B CAN communication Engine switch off Below 1 V Engine switch on (IG) Pulse generation A53-13 (CANL) - A53-22 (E1) W - W-B CAN communication Engine switch off Below 1 V Engine switch on (IG) Pulse generation A53-18 (SBR) - A53-21 (SGR) G*1 - P*1 BR*2 - B*2 Rear height control sensor power supply Engine switch off Below 1 V Engine switch on (IG) Approx. 5 V A53-19 (SHRL) - A53-21 (SGR) L*1 - P*1 LG*2 - B*2 Rear height control sensor signal Engine switch off Below 1 V Engine switch on (IG) 1 to 4 V A53-29 (SML)*1 - A53-22 (E1) P - W-B Swivel motor LH LIN communication Engine switch off Below 1 V Engine switch on (IG) Pulse generation A53-30 (LH+) - A53-22 (E1) GR - W-B Leveling motor LH LIN communication Engine switch off Below 1 V Engine switch on (IG) Pulse generation HINT: *1: w/ AFS *2: w/o Air Suspension If the result is not as specified, the AFS ECU (headlight swivel ECU assembly) may have a malfunction. Waveform 1 Item Content Tool setting 2 V/DIV., 20 ms./DIV.
3. CHECK INNER REAR VIEW MIRROR ASSEMBLY (w/ Automatic High Beam System) Disconnect the T5 inner rear view mirror assembly connector. Measure the resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition T5-2 (E) - Body ground W - Body ground Inner rear view mirror assembly ground Always Below 1 ohms If the result is not as specified, there may be a malfunction in the wire harness. Measure the voltage according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition T5-1 (IG) - Body ground B - Body ground Inner rear view mirror assembly power supply Engine switch off Below 1 V Engine switch on (IG) 11 to 14 V If the result is not as specified, there may be a malfunction in the wire harness. Reconnect the T5 inner rear view mirror assembly connector. Measure the voltage or check for pulses according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition T5-12 (LIN) - T5-2 (E) L - W LIN communication Engine switch off Below 1 V Automatic high beam system operates Pulse generation (See waveform 1 see scheme 27 ) If the result is not as specified, the inner rear view mirror assembly may have a malfunction. Waveform 1 Item Content Tool setting 2 V/DIV., 20 ms./DIV.

DIAGNOSIS SYSTEM

1. DESCRIPTION Lighting system data and the Diagnostic Trouble Codes (DTCs) can be read from the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the Techstream to check for malfunctions and to repair.
2. CHECK DLC3 Check the DLC3. Refer to «GENERAL INFORMATION»(ref-400649-S41373024542011051800000) .
3. INSPECT BATTERY VOLTAGE Standard Voltage 11 to 14 V If the voltage is below 11 V, recharge or replace the battery.

DTC CHECK / CLEAR

1. CHECK DTC Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Trouble Codes. Check for DTCs.
2. CLEAR DTC Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Trouble Code. Clear the DTCs.

DATA LIST / ACTIVE TEST

1. DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuator and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time. NOTE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not. Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / (desired system) / Data List. Read the Data List according to the display on the Techstream. MAIN BODY Tester Display Measurement Item/Range Normal Condition Diagnostic Note IG SW Engine switch IG signal/ON or OFF ON: Engine switch on (IG) OFF: Engine switch off - Parking Brake SW Parking brake switch signal/ON or OFF ON: Parking brake switch on OFF: Parking brake switch off - RR Door Courtesy SW Rear door courtesy light switch RH/ON or OFF ON: Rear door RH open OFF: Rear door RH closed - RL Door Courtesy SW Rear door courtesy light switch LH/ON or OFF ON: Rear door LH open OFF: Rear door LH closed - Back Door Courtesy SW Back door courtesy switch signal/ON or OFF ON: Back door open OFF: Back door closed - FR Door Courtesy Front door courtesy light switch RH signal/ON or OFF ON: Front door RH open OFF: Front door RH closed - FL Door Courtesy Front door courtesy light switch LH signal/ON or OFF ON: Front door LH open OFF: Front door LH closed - Dimmer SW Dimmer switch high position signal/ON or OFF ON: Dimmer switch in high or high flash position OFF: Dimmer switch in low position - Passing Light SW Dimmer switch high flash position (pass) signal/ON or OFF ON: Dimmer switch in high flash position OFF: Dimmer switch not in high flash position - Front Fog Light SW Front fog light switch signal/ON or OFF ON: Front fog light switch on OFF: Front fog light switch off - Auto Light SW Light control switch AUTO position signal/ON or OFF ON: Light control switch in AUTO position OFF: Light control switch not in AUTO position - Head Light SW (Head) Light control switch head position signal/ON or OFF ON: Light control switch in head position OFF: Light control switch not in head position - Head Light SW (Tail) Light control switch tail position signal/ON or OFF ON: Light control switch in tail or head position OFF: Light control switch in neither tail nor head position - Illumination Rate Info Illumination rate information/0 ms. to 99.99 ms. Value is output according to ambient light levels - Auto H Beam STS0 Automatic high beam sensor current state/Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin, LIN Err Condition can be displayed Undetec: undetected CAM NA: camera detection malfunction No sens: no detection Hlight: oncoming vehicles with headlights on Taillgt: preceding vehicles with taillights on Speed: vehicle speed Daytime: daytime state Village: urban area Malfunc: malfunction Delay: standby mode Aim Lmt: aiming misalignment SAE Mod: SAE mode Undefin: undefined state LIN Err: LIN communication error Auto H Beam STS1 Automatic high beam sensor state past 1/Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin, LIN Err Condition can be displayed Undetec: undetected CAM NA: camera detection malfunction No sens: no detection Hlight: oncoming vehicles with headlights on Taillgt: preceding vehicles with taillights on Speed: vehicle speed Daytime: daytime state Village: urban area Malfunc: malfunction Delay: standby mode Aim Lmt: aiming misalignment SAE Mod: SAE mode Undefin: undefined state LIN Err: LIN communication error Auto H Beam STS2 Automatic high beam sensor state past 2/Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin, LIN Err Condition can be displayed Undetec: undetected CAM NA: camera detection malfunction No sens: no detection Hlight: oncoming vehicles with headlights on Taillgt: preceding vehicles with taillights on Speed: vehicle speed Daytime: daytime state Village: urban area Malfunc: malfunction Delay: standby mode Aim Lmt: aiming misalignment SAE Mod: SAE mode Undefin: undefined state LIN Err: LIN communication error Auto H Beam STS3 Automatic high beam sensor state past 3/Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin, LIN Err Condition can be displayed Undetec: undetected CAM NA: camera detection malfunction No sens: no detection Hlight: oncoming vehicles with headlights on Taillgt: preceding vehicles with taillights on Speed: vehicle speed Daytime: daytime state Village: urban area Malfunc: malfunction Delay: standby mode Aim Lmt: aiming misalignment SAE Mod: SAE mode Undefin: undefined state LIN Err: LIN communication error Auto H Beam STS4 Automatic high beam sensor state past 4/Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin, LIN Err Condition can be displayed Undetec: undetected CAM NA: camera detection malfunction No sens: no detection Hlight: oncoming vehicles with headlights on Taillgt: preceding vehicles with taillights on Speed: vehicle speed Daytime: daytime state Village: urban area Malfunc: malfunction Delay: standby mode Aim Lmt: aiming misalignment SAE Mod: SAE mode Undefin: undefined state LIN Err: LIN communication error Auto H Beam STS5 Automatic high beam sensor state past 5/Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin, LIN Err Condition can be displayed Undetec: undetected CAM NA: camera detection malfunction No sens: no detection Hlight: oncoming vehicles with headlights on Taillgt: preceding vehicles with taillights on Speed: vehicle speed Daytime: daytime state Village: urban area Malfunc: malfunction Delay: standby mode Aim Lmt: aiming misalignment SAE Mod: SAE mode Undefin: undefined state LIN Err: LIN communication error Auto H Beam STS6 Automatic high beam sensor state past 6/Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin, LIN Err Condition can be displayed Undetec: undetected CAM NA: camera detection malfunction No sens: no detection Hlight: oncoming vehicles with headlights on Taillgt: preceding vehicles with taillights on Speed: vehicle speed Daytime: daytime state Village: urban area Malfunc: malfunction Delay: standby mode Aim Lmt: aiming misalignment SAE Mod: SAE mode Undefin: undefined state LIN Err: LIN communication error Auto H Beam STS7 Automatic high beam sensor state past 7/Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin, LIN Err Condition can be displayed Undetec: undetected CAM NA: camera detection malfunction No sens: no detection Hlight: oncoming vehicles with headlights on Taillgt: preceding vehicles with taillights on Speed: vehicle speed Daytime: daytime state Village: urban area Malfunc: malfunction Delay: standby mode Aim Lmt: aiming misalignment SAE Mod: SAE mode Undefin: undefined state LIN Err: LIN communication error AFS Tester Display Measurement Item/Range Normal Condition Diagnostic Note AFS OFF Switch AFS OFF switch signal/ON or OFF ON: AFS off OFF: AFS on - Traveling Direction Traveling Direction/Not Fwd or Fwd Not Fwd: Shift lever in R or N Fwd: Shift lever in any position except R and N - Headlight Low Beam State Low beam headlight state/ON or OFF ON: Low beam headlights on OFF: Low beam headlights off - Headlight High Beam State High beam headlight state/ON or OFF ON: High beam headlights on OFF: High beam headlights off - DRL State State of the DRL/ON or OFF ON: DRL operating OFF: DRL not operating - Engine Engine condition/Run or Stop Run: Engine running Stop: Engine stopped - +B IG power supply voltage value/0 to 19.75 V 11 to 14 V - Height Sens Pw Supply Val Height control sensor power supply value/0 to 6.25 V Approx. 5 V - Fr Height Sens Signal Val Front height sensor signal value/0 to 5 V Approx. 2.5 V (When vehicle is level) Value changes according to vehicle height Rr Height Sens Signal Val Rear height control sensor signal value/0 to 5 V Approx. 2.5 V (When vehicle is level) Value changes according to vehicle height Steering Sens Signal Steering angle sensor signal value/-384 deg to 382.5 deg Approx. 0 deg (When steering wheel is straight) Value changes according to steering wheel position Steering Sens Center Pos Steering angle sensor center position/-3072 deg to 3070.5 deg Condition can be displayed - FR Wheel Speed Front right wheel speed/0 to 327.67 km/h Condition can be displayed - FL Wheel Speed Front left wheel speed/0 to 327.67 km/h Condition can be displayed - Vehicle Speed Vehicle speed/0 to 327.67 km/h Condition can be displayed - Rear Height Adjust Valid Flag Rear height adjustment range/VALID or INVALID Condition can be displayed - Init Writing Count Number of times for initialization/0 to 255 Condition can be displayed - Sensor Initialization Hist Sensor Initialization History/not comp, 10%, 25%, 50%, 75%, 100% or complied Condition can be displayed - L Swivel Target Step Swivel motor LH target step value/0 to 400 step 8 to 109 step - L Swivel Current Step Swivel motor LH current step value/0 to 400 step 8 to 109 step - R Swivel Target Step Swivel motor RH target step value/0 to 400 step 8 to 160 step - R Swivel Current Step Swivel motor RH current step value/0 to 400 step 8 to 160 step - LR Leveling Target Step Leveling motor LH and RH target step value/0 to 300 step 5 to 279 step - L Leveling Current Step Leveling motor LH current step value/0 to 300 step 5 to 279 step - R Leveling Current Step Leveling motor RH current step value/0 to 300 step 5 to 279 step - Number Of Trouble Codes Number of trouble codes/0 to 255 Condition can be displayed - BACK DOOR Tester Display Measurement Item/Range Normal Condition Courtesy SW Back door courtesy switch/ON or OFF ON: Back door open OFF: Back door closed
2. ACTIVE TEST HINT: Using the Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests. Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / (desired system) / Active Test. Perform the Active Test according to the display on the Techstream. MAIN BODY Tester Display Test Part Control Range Diagnostic Note Taillight Relay Taillight relay ON/OFF - Headlight Relay Headlight relays ON/OFF - Head Light Hi High beam headlights ON/OFF - Daytime Running Light Daytime running lights ON/OFF - Front Fog Light Relay Front fog light relay ON/OFF Light control switch is in tail position AFS Tester Display Test Part Control Range Diagnostic Note Drive The Leveling Motor UP*1 Leveling motor upward operation ON/OFF ON: Move up OFF: Stop Drive The Leveling Motor DOWN*1 Leveling motor downward operation ON/OFF ON: Move down OFF: Stop Drive Swivel Motor RH RIGHT*1 Swivel motor RH right direction rotation ON/OFF ON: Move right OFF: Stop Drive Swivel Motor RH LEFT*1 Swivel motor RH left direction rotation ON/OFF ON: Move left OFF: Stop Drive Swivel Motor LH RIGHT*1 Swivel motor LH right direction rotation ON/OFF ON: Move right OFF: Stop Drive Swivel Motor LH LEFT*1 Swivel motor LH left direction rotation ON/OFF ON: Move left OFF: Stop AFS OFF Indicator AFS OFF indicator ON/OFF - *1: Perform the active test with the engine running and vehicle stopped. MIRROR L Tester Display Test Part Control Range Foot Light Door mirror foot light LH ON/OFF MIRROR R Tester Display Test Part Control Range Foot Light Door mirror foot light RH ON/OFF

DIAGNOSTIC TROUBLE CODE CHART

LIGHTING SYSTEM

LIGHTING SYSTEM