Mirror: Diagnosis Lexus RX II facelift

HOW TO PROCEED WITH TROUBLESHOOTING

HINT

1. Use this procedure to troubleshoot the power mirror control system.
2. The intelligent tester should be used in steps 3 and 5.

1. VEHICLE BROUGHT TO WORKSHOP
2. CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK
3. CHECK COMMUNICATION FUNCTION OF BODY MULTIPLEX COMMUNICATION SYSTEM (BEAN) HINT: See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-236026-S07937986392006062900000) Use the intelligent tester to check for normal function of the multiplex communication system. (ECU unconnected, communication line malfunctioning) If no code are output, proceed to A. (ECU unconnected, communication line malfunctioning) If any codes are output, proceed to B. B: GO TO «MULTIPLEX COMMUNICATION SYSTEM»(ref-236026-S31587020652006062900000) A: Go to next step.
4. PROBLEM SYMPTOMS TABLE HINT: See «PROBLEM SYMPTOMS TABLE»(ref-236042-S15634197312006062900000)
5. OVERALL ANALYSIS AND TROUBLESHOOTING Data list/Active test HINT: See «DATA LIST / ACTIVE TEST»(ref-236042-S32011014882006062900000) Circuit inspection Terminals of ECU HINT: See «TERMINALS OF ECU»(ref-236042-S02300746982006062900000)
6. ADJUST, REPAIR OR REPLACE END

PROBLEM SYMPTOMS TABLE

Power Mirror Control System

PROBLEM SYMPTOMS TABLE

Scheme 34

Scheme 35

1. CHECK OUTER MIRROR CONTROL ECU LH Disconnect the R26 connector. Measure the voltage and resistance according to the value(s) in the table below. Standard voltage TERMINAL DESCRIPTION - SPECIFIED CONDITION (VOLTAGE) Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition BDR (R26-3) - Body ground G - Body ground +B power supply Always 10 to 14 V CPUB (R26-7) - Body ground L-B - Body ground +B power supply Always 10 to 14 V SIG (R26-8) - Body ground GR - Body ground Ignition power supply Ignition switch OFF --> ON 0 V --> 10 to 14 V Standard resistance TERMINAL DESCRIPTION - SPECIFIED CONDITION (RESISTANCE) Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition GND (R26-1) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side. Reconnect the R26 connector. Measure the voltage according to the value(s) in the table below. Standard voltage TERMINAL DESCRIPTION - SPECIFIED CONDITION (VOLTAGE) Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition LMVR (R28-1) - Body ground V - Body ground Outer mirror switch signal (Up or Right) Ignition switch ACC, Left/Right adjustment switch L side, Mirror switch OFF --> UP or Right 0 V --> 10 to 14 V HTR+ (R28-4) - HTR-(R23-12) B - B Mirror heater signal Mirror heater switch ON 0 V --> 10 to 14 V LVC (R28-5) - Body ground R-W - Body ground Power source for mirror position sensor Ignition switch OFF --> ACC 0 V --> 0 to 5 V VSSR (R28-6) - Body ground Y-B - Body ground Vertical direction position signal Ignition switch ACC, Left/Right adjustment switch L side, Mirror switch uppermost position --> lowermost position 0 V --> 1 to 3 V LMHR (R28-9) - Body ground BR - Body ground Outer mirror switch signal (Left or Down) Ignition switch ACC, Left/Right adjustment switch L side, Mirror switch OFF --> LEFT or DOWN 0 V --> 10 to 14 V LM+R (R28-10) - Body ground R - Body ground Outer mirror switch signal (Right or Down) Ignition switch ACC, Left/Right adjustment switch L side, Mirror switch OFF --> RIGHT or DOWN 0 V --> 10 to 14 V HSSR (R28-13) - Body ground P - Body ground Horizontal direction position signal Ignition switch ACC, Left/Right adjustment switch L side, Mirror switch innermost position --> outermost position 0 V --> 1 to 3 V
2. CHECK OUTER MIRROR CONTROL ECU RH Disconnect the R27 connector. Measure the voltage and resistance according to the value(s) in the table below. Standard voltage TERMINAL DESCRIPTION - SPECIFIED CONDITION (VOLTAGE) Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition BDR (R27-3) - Body ground G - Body ground +B power supply Always 10 to 14 V CPUB (R27-7) - Body ground L-B - Body ground +B power supply Always 10 to 14 V SIG (R27-8) - Body ground GR - Body ground Ignition power supply Ignition switch OFF --> ON 0 V --> 10 to 14 V Standard resistance TERMINAL DESCRIPTION - SPECIFIED CONDITION (RESISTANCE) Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition GND (R27-1) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side. Reconnect the R27 connector. Measure the voltage according to the value(s) in the table below. Standard voltage TERMINAL DESCRIPTION - SPECIFIED CONDITION (VOLTAGE) Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition LMVR (R29-1) - Body ground V - Body ground Outer mirror switch signal (Up or Right) Ignition switch ACC, Left/Right adjustment switch L side, Mirror switch OFF --> UP or Right 0 V --> 10 to 14 V HTR+ (R29-4) - HTR- (R29-12) B - B Mirror heater signal Mirror heater switch ON 0 V --> 10 to 14 V LVC (R29-5) - Body ground R-W - Body ground Power source for mirror position sensor Ignition switch OFF --> ACC 0 V --> 0 to 5 V VSSR (R29-6) - Body ground Y-B - Body ground Vertical direction position signal Ignition switch ACC, Left/Right adjustment switch L side, Mirror switch uppermost position --> lowermost position 0 V --> 1 to 3 V LMHR (R29-9) - Body ground BR - Body ground Outer mirror switch signal (Left or Down) Ignition switch ACC, Left/Right adjustment switch L side, Mirror switch OFF --> LEFT or DOWN 0 V --> 10 to 14 V LM+R (R29-10) - Body ground R - Body ground Outer mirror switch signal (Right or Down) Ignition switch ACC, Left/Right adjustment switch L side, Mirror switch OFF --> RIGHT or DOWN 0 V --> 10 to 14 V HSSR (R29-13) - Body ground P - Body ground Horizontal direction position signal Ignition switch ACC, Left/Right adjustment switch L side, Mirror switch innermost position --> outermost position 0 V --> 1 to 3 V

Scheme 36

1. DESCRIPTION Data of the system can be read from the Data Link Connector 3 (DLC3) of the vehicle. Therefore, when the system seems to be malfunctioning, use the intelligent tester to check for a malfunction and repair it.
2. CHECK DLC3 The vehicle's ECM uses ISO 9141-2 communication protocol. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 9141-2 format. Standard TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Condition Specified Condition 7 (Bus + line) - 5 (Signal ground) During communication Pulse generation 4 (Chassis ground) - Body ground Constant Below 1 ohms 5 (Signal ground) - Body ground Constant Below 1 ohms 16 (B+) - Body ground Constant 9 to 14 V HINT: If the screen displays a communication error message after you have connected the cable of the intelligent tester to the DLC3, turned the ignition switch ON and used the intelligent tester, the problem may be on the vehicle side or tester side. If communication is normal when the tester is connected to another vehicle, inspect the DLC3 of the original vehicle. If communication is still impossible when the tester is connected to another vehicle, the problem is probably in the tester itself, so consult the Service Department listed in the tester's instruction manual.

Scheme 37

1. USING INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Monitor the ECU data by following the prompts on the tester screen. HINT: The intelligent tester has a "Snapshot" function which records the monitored data. Refer to the intelligent tester operator's manual for further details.
2. DATA LIST HINT: Using the DATA LIST displayed on the intelligent tester, you can read the value of the switch, sensor, actuator, etc. without parts removal. Reading the DATA LIST as the first step of troubleshooting is one way to shorten the labor time. Connect the intelligent tester to the DLC3. Turn the ignition switch ON. Read the DATA LIST according to the display on the tester. MIRROR-L/MIRROR-R MIRROR-L/MIRROR-R DATA LIST Item Test Details Diagnostic Note MIRR POS SEN V Vertical mirror position/MIN: 0, MAX 5 V Within range from 0 to 5 V MIRR POS SEN H Horizontal mirror position/MIN: 0, MAX 5 V Within range from 0 to 5 V MIRR MEM 1 Mirror position memorized in memory switch M1/NOT MEM or MEM MEM: Memorized NOT MEM: Not memorized MIRR MEM 2 Mirror position memorized in memory switch M2/NOT MEM or MEM MEM: Memorized NOT MEM: Not memorized MASTER SW MASTER SW DATA LIST Item Test Details Diagnostic Note SEAT SET SW Seat memory set switch signal/ON or OFF ON: Memory set switch is pressed OFF: Memory set switch is not pressed SEAT MEM M1 Seat memory switch M1 signal/ON or OFF ON: Seat memory M1 switch is pressed OFF: Seat memory M1 switch is not pressed SEAT MEM M2 Seat memory switch M2 signal/ON or OFF ON: Seat memory M2 switch is pressed OFF: Seat memory M2 switch is not pressed D-SEAT D-SEAT DATA LIST Item Test Details Diagnostic Note POWER VOLTAGE Power supply for position control ECU & switch/MIN: 0 V, MAX: 19.89 V Within range from 11 to 14 V IG SW Ignition switch status/ON or OFF ON: Ignition switch is ON OFF: Ignition switch is OFF KEY UNLOCK SW Key unlock warning switch signal/ON or OFF ON: Key is in ignition key cylinder OFF: Key is not in ignition key cylinder PNP SW Park/Neutral position switch signal/ON or OFF ON: Shift in P position OFF: Shift in any position except neutral M1 SW Seat memory switch M1 signal/ON or OFF ON: Seat memory switch M1 is ON OFF: Seat memory switch M1 is OFF M2 SW Seat memory switch M2 signal/ON or OFF ON: Seat memory switch M2 is ON OFF: Seat memory switch M2 is OFF SET SW Seat memory set switch signal/ON or OFF ON: Memory set switch is ON OFF: Memory set switch is OFF MEM M1 SW Driving position memorized in seat memory switch M1/NOT MEM or MEM MEM: Memorized NOT MEM: Not memorized MEM M2 SW Driving position memorized in seat memory switch M2/NOT MEM or MEM MEM: Memorized NOT MEM: Not memorized D-MIRR MEM M1 Driver side mirror position memorized in seat memory switch M1/NOT MEM or MEM MEM: Memorized NOT MEM: Not memorized D-MIRR MEM M2 Driver side mirror position memorized in seat memory switch M2/NOT MEM or MEM MEM: Memorized NOT MEM: Not memorized P-MIRR MEM M1 Passenger side mirror position memorized in seat memory switch M1/NOT MEM or MEM MEM: Memorized NOT MEM: Not memorized P-MIRR MEM M2 Passenger side mirror position memorized in seat memory switch M2/NOT MEM or MEM MEM: Memorized NOT MEM: Not memorized D-MIRR MEM POS 1 Driver side mirror position memorized in seat memory switch M1/MIN: 0, MAX: 65535 Within range from 0 to 65535 P-MIRR MEM POS 1 Passenger side mirror position memorized in seat memory switch M1/MIN: 0, MAX: 65535 Within range from 0 to 65535 D-MIRR MEM POS 2 Driver side mirror position memorized in seat memory switch M2/MIN: 0, MAX: 65535 Within range from 0 to 65535 P-MIRR MEM POS 2 Passenger side mirror position memorized in seat memory switch M2/MIN: 0, MAX: 65535 Within range from 0 to 65535 BODY BODY DATA LIST Item Test Details Diagnostic Note MIRR SEL SW R Mirror selection switch signal for RH mirror/ON or OFF ON: Switch is in Right position OFF: Switch is in neutral or Left position MIRR SEL SW L Mirror selection switch signal for LH mirror/ON or OFF ON: Switch is in Left position OFF: Switch is in neutral or Right position MIRR POS SW R Mirror position switch signal (Right)/ON or OFF ON: Switch R is ON OFF: Any switch except R is ON or all switches are OFF MIRR POS SW L Mirror position switch signal (Left)/ON or OFF ON: Switch L is ON OFF: Any switch except L is ON or all switches are OFF MIRR POS SW UP Mirror position switch signal (Up)/ON or OFF ON: Switch UP is ON OFF: Any switch except UP is ON or all switches are OFF MIRR POS SW DWN Mirror position switch signal (Down)/ON or OFF ON: Switch DOWN is ON OFF: Any switch except DOWN is ON or all switches are OFF
3. ACTIVE TEST HINT: Performing the ACTIVE TEST using the intelligent tester allows you to operate the relay, VSV, actuator, etc. without parts removal. Performing the ACTIVE TEST as the first step of troubleshooting is one way to shorten the labor time. It is possible to display the DATA LIST during the ACTIVE TEST. Connect the intelligent tester to the DLC3. Turn the ignition switch ON. Perform the ACTIVE TEST according to the display on the tester. MIRROR-L/MIRROR-R MIRROR-L/MIRROR-R ACTIVE TEST Item Test Details MIRR UP/DOWN Mirror vertical operation: UP/DOWN MIRR RIGHT/LEFT Mirror horizontal operation: RIGHT/LEFT MIRR HEATER Mirror heater operation: OFF/ON

Scheme 38

1. CHECK MEMORY AND REACTIVATION FUNCTION Turn the ignition switch ON and move the shift lever into the P position. Move the seat into the foremost position and uppermost position using each seat switch. Check that the buzzer sounds for 0.5 second and the seat position is recorded when the M1 switch is pressed while the SET switch is held down. Move the seat out of the foremost position and uppermost position using each seat switch. Check that the buzzer sounds for 0.5 second and the seat position is recorded when the M2 switch is pressed while the SET switch is held down. Check that the buzzer sounds for 0.1 second and the seat automatically moves into the foremost position and uppermost position (set positions) when the M1 switch is pressed. Check that the buzzer sounds for 0.1 second and the seat automatically moves out of the foremost position and uppermost position (set positions) when the M2 switch is pressed. Check that the seat automatically moves into the set position when the M1 or M2 switch is pressed within 30 seconds after the ignition switch is turned OFF, the key is pulled out from the key cylinder and the driver side door is opened. Move the seat into the maximum positions of the slide movement, and disconnect the negative terminal of the battery while the memory switch is in the ON position. Then leave the seat in the position for 3 minutes. The seat position memory will be erased. Move the seat into all the maximum positions (front/rear and up/down) using each seat switch. Check that the seat does not move (the seat position is not recorded) when the M1 switch or the M2 switch is pressed, after the M1 switch and M2 switch are pressed at one time while the SET switch is held down.