Mirror: Overview Lexus RX II facelift

SYSTEM DESCRIPTION

The power mirror control system with memory function moves the power mirror to the memorized position when the seat memory switch is pressed. The system is controlled by the seat ECU (position control ECU & switch assembly built into the driver side seat) whose memory function records the desired position of the mirror and the outer mirror control ECU which commands the mirror motor to operate. When the power mirror control system with memory function is operating normally, pressing the seat memory switch activates the seat ECU to send a signal to the outer mirror control ECU via BEAN, which then commands the mirror to move the memorized position.

DESCRIPTION

A switch signal of the outer mirror switch is transmitted to the selected outer mirror control ECU by way of the multiplex network body ECU. Then, the outer mirror control ECU activates the mirror motor to move the mirror UP, DOWN, RIGHT and LEFT in response to the input.

HINT

The power mirror control system is a part of the multiplex communication system. This system features shared communication wiring that reduces the wiring complexity of the communication lines. The first step in any repair is to confirm the proper operation of the communication system. Proceed with troubleshooting after the communication has been verified (See the MULTIPLEX COMMUNICATION SYSTEM ).

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1. READ VALUE ON INTELLIGENT TESTER Check the DATA LIST for proper function of the outer mirror switches. BODY BODY DATA LIST Item Measurement Item/Display (Range) Normal Condition 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 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 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 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 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 NG : Go to step 2 OK : CHECK AND REPLACE OUTER MIRROR CONTROL ECU
2. INSPECT OUTER MIRROR SWITCH Remove the outer mirror switch. Measure the resistance according to the value(s) in the table below when the switch is operated. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION Tester Connection Switch Position Specified Condition 2 - 3 OFF 10 kohms or higher UP 225 to 275 ohms DOWN 437 to 503 ohms LEFT 744 to 856 ohms RIGHT 437 to 503 ohms 1 - 2 L 90 to 110 ohms R 10 ohms or less NG : REPLACE OUTER MIRROR SWITCH OK : Go to next step.
3. CHECK WIRE HARNESS (OUTER MIRROR SWITCH - BODY ECU) Disconnect the R5 and B4 connectors. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION (RESISTANCE) Tester Connection Condition Specified Condition R5-3 (M+) - B4-11 (MIRB) Always Below 1 ohms R5-1 (MSW) - B4-12 (MIRS) Always Below 1 ohms R5-2 (E1) - B4-3 (MIRE) Always Below 1 ohms R5-3 (M+) - Body ground Always 10 kohms or higher R5-1 (MSW) - Body ground Always 10 kohms or higher R5-2 (E1) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : PROCEED TO NEXT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

Mirror control switch and memorized mirror position signals (from the position control ECU & switch (seat ECU)) are sent to the mirror control ECU. The mirror control ECU moves the selected mirror UP, DOWN, LEFT and RIGHT in response to the input.

HINT

The power mirror control system is a part of the multiplex communication system. This system features shared communication wiring that reduces the wiring complexity of the communication lines. The first step in any repair is to confirm the proper operation of the communication system. Proceed with troubleshooting after the communication has been verified (See the MULTIPLEX COMMUNICATION SYSTEM ).

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1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER Select the ACTIVE TEST, use the intelligent tester to issue a control command, and then check that the outer rear view mirrors. 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 NG : Go to step 2 OK : REPLACE OUTER MIRROR CONTROL ECU
2. INSPECT OUTER REAR VIEW MIRROR Outer rear view mirror LH: Disconnect the R28 connector. Apply battery voltage and check operation of the mirror face. Standard MEASUREMENT CONDITION AND MIRROR OPERATION Measurement Condition Mirror Operation Battery positive (+) --> R28-1 (LMVR) Battery negative (-) --> R28-10 (LM+R) Turns upward (A) Battery positive (+) --> R28-10 (LM+R) Battery negative (-) --> R28-1 (LMVR) Turns downward (B) Battery positive (+) --> R28-9 (LMHR) Battery negative (-) --> R28-10 (LM+R) Turns left (C) Battery positive (+) --> R28-10 (LM+R) Battery negative (-) --> R28-9 (LMHR) Turns right (D) Outer rear view mirror RH: Disconnect the R29 connector. Apply battery voltage and check operation of the mirror face. Standard MEASUREMENT CONDITION AND MIRROR OPERATION Measurement Condition Mirror Operation Battery positive (+) --> R29-1 (RMVR) Battery negative (-) --> R29-10 (RM+R) Turns upward (A) Battery positive (+) --> R29-10 (RM+R) Battery negative (-) --> R29-1 (RMVR) Turns downward (B) Battery positive (+) --> R29-9 (RMHR) Battery negative (-) --> R29-10 (RM+R) Turns left (C) Battery positive (+) --> R29-10 (RM+R) Battery negative (-) --> R29-9 (RMHR) Turns right (D) NG : REPLACE OUTER REAR VIEW MIRROR OK : REPLACE OUTER MIRROR CONTROL ECU

When the seat memory switch M1 or M2 is pressed, the position control ECU & switch (Seat ECU) transmits a signal of the memorized mirror position to the outer mirror control ECU by way of the power window regulator master switch. Then, the outer mirror control ECU drives the mirror motor.

HINT

The power mirror control system is a part of the multiplex communication system. This system features shared communication wiring that reduces the wiring complexity of the communication lines. The first step in any repair is to confirm the proper operation of the communication system. Proceed with troubleshooting after the communication has been verified (See the MULTIPLEX COMMUNICATION SYSTEM ).

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1. READ VALUE ON INTELLIGENT TESTER Check the DATA LIST for proper function of the seat memory switch. D-SEAT D-SEAT DATA LIST Item Switch Position Specified condition 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 P-MIRR MEM M1 Passenger side mirror position memorized in seat memory switch M1/NOT MEM or MEN P-MIRR MEM M2 Passenger side mirror position memorized in seat memory switch M2/NOT MEM or MEN NG : Go to step 2 OK : CHECK AND REPLACE OUTER MIRROR CONTROL ECU
2. CHECK SEAT MEMORY SWITCH Remove the seat memory switch. Measure the resistance according to the value(s) in the table below when the switch is operated. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION (RESISTANCE) Tester Connection Switch Condition Specified Condition 3 - 4 "SET" switch ON Below 1 ohms 1 - 4 "1" switch ON Below 1 ohms 2 - 4 "2" switch ON Below 1 ohms NG : REPLACE SEAT MEMORY SWITCH OK : Go to next step.
3. CHECK WIRE HARNESS (SEAT MEMORY SWITCH - MULTIPLEX NETWORK MASTER SWITCH) Disconnect the D15 and P22 switch connectors. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION (RESISTANCE) Tester Connection Condition Specified Condition D15-2 (MMRY) - P22-3 (MM) Always Below 1 ohms D15-4 (1) - P22-13 (M1) Always Below 1 ohms D15-3 (2) - P22-17 (M2) Always Below 1 ohms D15-1 (E) - Body ground Always Below 1 ohms NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE POSITION CONTROL ECU & SWITCH ASSEMBLY

This is the power source circuit for the outer mirror control ECU.

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1. INSPECT OUTER MIRROR CONTROL ECU (POWER SOURCE) Disconnect the R26 (R27) connector. Measure the voltage and resistance according to the value(s) in the table below. Outer mirror control ECU LH: Standard voltage OUTER MIRROR CONTROL ECU LH TESTER CONNECTION - SPECIFIED CONDITION (VOLTAGE) Tester Connection Condition Specified Condition R26-3 (BDR) - Body ground Always 10 to 14 V R26-7 (CPUB) - Body ground Always 10 to 14 V R26-8 (SIG) - Body ground Ignition switch ON 10 to 14 V Standard resistance OUTER MIRROR CONTROL ECU LH TESTER CONNECTION - SPECIFIED CONDITION (RESISTANCE) Tester Connection Condition Specified Condition R26-1 (GND) - Body ground Always Below 1 ohms Outer mirror control ECU RH: Standard voltage TESTER CONNECTION - SPECIFIED CONDITION (VOLTAGE) Tester Connection Condition Specified Condition R27-3 (BDR) - Body ground Always 10 to 14 V R27-7 (CPUB) - Body ground Always 10 to 14 V R27-8 (SIG) - Body ground Ignition switch ON 10 to 14 V Standard resistance TESTER CONNECTION - SPECIFIED CONDITION (RESISTANCE) Tester Connection Condition Specified Condition R27-1 (GND) - Body ground Always Below 1 ohms NG : REPAIR OR REPLACE WIRE HARNESS OK : REPLACE OUTER MIRROR CONTROL ECU

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PROBLEM SYMPTOMS TABLE

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1. SELECT COMPASS DISPLAY MODE The COMP switch allows you to select the Display or Non-display mode of the compass.
2. SET ZONE Deviation between the "magnetic north" and "actual north" differs depending on the location. Therefore, adjustment of the magnetism is required. Since the magnetic condition differs depending on the area where the vehicle is used, it is necessary for each user to set the zone (Refer to Compass Zone Map). The zone setting can be changed using the COMP switch of the inner mirror.
3. PERFORM CALIBRATION Because each vehicle has its own magnetic field, calibration should be performed for each vehicle. This compass function is used when storing the record of the vehicle's magnetic field.
4. WHEN COMPASS IS MAGNETIZED A compass could be magnetized during shipping by vessels or freight cars. Therefore, make sure to perform calibration and ensure that calibration is performed properly before delivery. If it cannot be done (cannot be completed in spite of driving around several times), it may be caused by magnetization. Demagnetize the vehicle using a demagnetizer and perform calibration again.
5. SET COMPASS
6. ZONE SETTING MODE Pressing the COMP switch for 3 seconds in the normal mode will activate the zone setting mode. A number (1 to 15) is displayed on the compass display. NOTE: In the initial state, "8" is displayed. The displayed number increases by 1 every time the COMP switch is pressed. Referring to the map, check the number for the area where the vehicle will be used and set the zone number. Leave it untouched for several seconds after setting and check that the compass display shows an azimuthal direction (N, NE, E, SE, S, SW, W or NW) or "C".
7. CALIBRATION SETTING MODE Pressing the COMP switch for 6 seconds in the normal mode will activate the calibration setting mode. Drive the vehicle at a slow speed of 8 km/h (5 mph) or less in the circular direction. Driving around the circle 1 to 3 times will display the azimuthal direction on the display, completing the calibration. NOTE: After the calibration is completed, it is not necessary to perform the above procedures unless the magnetic field strength is drastically changed. If this happens, the azimuthal display will be changed to "C".

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1. REMOVE INNER REAR VIEW MIRROR Disconnect the connector. Using a "torx" socket wrench (T20), remove the screw and the inner rear view mirror.

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1. INSPECT INNER REAR VIEW MIRROR ASSEMBLY Inspect operation of the electrochromic inner mirror. Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 2. Attach black colored tape to the forward sensor to prevent it from sensing. Light up the mirror with an electric light, and check that the mirror surface changes from bright to dark. Standard: Mirror surface changes from bright to dark If the result is not as specified, replace the mirror assembly.

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1. INSTALL INNER REAR VIEW MIRROR Using a "torx" socket wrench (T20), install the inner rear view mirror with the screw. Torque: 1.5 N*m (15 kgf*cm, 13 in.*lbf) Connect the connector.

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1. REMOVE FRONT DOOR INSIDE HANDLE BEZEL PLUG (See «DISASSEMBLY»(ref-236020-S10015224202006062900000) )
2. REMOVE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY (See «DISASSEMBLY»(ref-236020-S10015224202006062900000) )
3. REMOVE DOOR ARMREST COVER (See «DISASSEMBLY»(ref-236020-S10015224202006062900000) )
4. REMOVE FRONT DOOR LOWER FRAME BRACKET GARNISH (See «DISASSEMBLY»(ref-236020-S10015224202006062900000) )
5. REMOVE FRONT DOOR TRIM BOARD SUB-ASSEMBLY (See «DISASSEMBLY»(ref-236020-S10015224202006062900000) )
6. REMOVE OUTER REAR VIEW MIRROR ASSEMBLY Disconnect the connector and remove the clamp. Remove the 3 bolts and the outer rear view mirror assembly.
7. REMOVE OUTER REAR VIEW MIRROR Push the upper part of the mirror surface and tilt it. Apply protective tape on the outer rear view mirror assembly. Using a molding remover, disengage the 2 claws at the lower part of the outer rear view mirror. Pull the mirror in the direction indicated by the arrow shown in the illustration to disengage the 2 claws on the upper part of the outer rear view mirror, and separate the outer rear view mirror sub-assembly. Disconnect each connector and remove the outer rear view mirror.

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1. INSPECT OUTER REAR VIEW MIRROR ASSEMBLY RH (W/ MEMORY) Inspect outer mirror motor operation. Remove the outer rear view mirror assembly. Apply battery voltage and check operation of the mirror face, as shown in the table and illustration. Standard MEASUREMENT - SPECIFIED CONDITION Measurement Condition Specified Condition Battery positive (+) --> Terminal 1 (RMVR) Battery negative (-) --> Terminal 10 (RM+R) Turns upward (A) Battery positive (+) --> Terminal 10 (RM+R) Battery negative (-) --> Terminal 1 (RMVR) Turns downward (B) Battery positive (+) --> Terminal 9 (RMHR) Battery negative (-) --> Terminal 10 (RM+R) Turns left (C) Battery positive (+) --> Terminal 10 (RM+R) Battery negative (-) --> Terminal 9 (RMHR) Turns right (D) Inspect outer mirror heater operation. Apply battery voltage and check operation of the mirror face, as shown in the table and illustration. Standard MEASUREMENT - SPECIFIED CONDITION Measurement Condition Specified Condition Battery positive (+) --> Terminal 4 (HTR+) Battery negative (-) --> Terminal 12 (HTR-) Mirror surface temperature becomes higher Inspect electrochromic outer mirror operation. Apply battery voltage and check operation of the mirror face, as shown in the table and illustration. Standard MEASUREMENT - SPECIFIED CONDITION Measurement Condition Specified Condition Battery positive (+) --> Terminal 7 (EC+) Battery negative (-) --> Terminal 15 (EC-) Mirror surface changes to dark
2. INSPECT OUTER REAR VIEW MIRROR ASSEMBLY RH (W/O MEMORY) Inspect outer mirror motor operation. Remove the outer rear view mirror assembly. Apply battery voltage and check operation of the mirror face, as shown in the table and illustration. Standard MEASUREMENT - SPECIFIED CONDITION Measurement Condition Specified Condition Battery positive (+) --> Terminal 2 (MV) Battery negative (-) --> Terminal 1 (M+) Turns upward (A) Battery positive (+) --> Terminal 1 (M+) Battery negative (-) --> Terminal 2 (MV) Turns downward (B) Battery positive (+) --> Terminal 6 (MH) Battery negative (-) --> Terminal 1 (M+) Turns left (C) Battery positive (+) --> Terminal 1 (M+) Battery negative (-) --> Terminal 6 (MH) Turns right (D) Inspect outer mirror heater operation. Apply battery voltage and check operation of the mirror face, as shown in the table and illustration. Standard MEASUREMENT - SPECIFIED CONDITION Measurement Condition Specified Condition Battery positive (+) --> Terminal 7 (HTR+) Battery negative (-) --> Terminal 3 (HTR-) Mirror surface temperature becomes higher Inspect electrochromic outer mirror operation. Apply battery voltage and check operation of the mirror face, as shown in the table and illustration. Standard MEASUREMENT - SPECIFIED CONDITION Measurement Condition Specified Condition Battery positive (+) --> Terminal 4 (EC+) Battery negative (-) --> Terminal 5 (EC-) Mirror surface changes to dark
3. INSPECT OUTER REAR VIEW MIRROR ASSEMBLY LH (W/ MEMORY) Inspect outer mirror motor operation. Remove the outer rear view mirror assembly. Apply battery voltage and check operation of the mirror face, as shown in the table and illustration. Standard MEASUREMENT - SPECIFIED CONDITION Measurement Condition Specified Condition Battery positive (+) --> Terminal 1 (LMVR) Battery negative (-) --> Terminal 10 (LM+R) Turns upward (A) Battery positive (+) --> Terminal 10 (LM+R) Battery negative (-) --> Terminal 1 (LMVR) Turns downward (B) Battery positive (+) --> Terminal 9 (LMHR) Battery negative (-) --> Terminal 10 (LM+R) Turns left (C) Battery positive (+) --> Terminal 10 (LM+R) Battery negative (-) --> Terminal 9 (LMHR) Turns right (D) Inspect outer mirror heater operation. Apply battery voltage and check operation of the mirror face, as shown in the table and illustration. Standard MEASUREMENT - SPECIFIED CONDITION Measurement Condition Specified Condition Battery positive (+) --> Terminal 4 (HTR+) Battery negative (-) --> Terminal 12 (HTR-) Mirror surface temperature becomes higher Inspect electrochromic outer mirror operation. Apply battery voltage and check operation of the mirror face, as shown in the table and illustration. Standard MEASUREMENT - SPECIFIED CONDITION Measurement Condition Specified Condition Battery positive (+) --> Terminal 7 (EC+) Battery negative (-) --> Terminal 15 (EC-) Mirror surface changes to dark
4. INSPECT OUTER REAR VIEW MIRROR ASSEMBLY LH (W/O MEMORY) Inspect outer mirror motor operation. Apply battery voltage and check operation of the mirror face, as shown in the table and illustration. Standard MEASUREMENT - SPECIFIED CONDITION Measurement Condition Specified Condition Battery positive (+) --> Terminal 2 (MV) Battery negative (-) --> Terminal 1 (M+) Turns upward (A) Battery positive (+) --> Terminal 1 (M+) Battery negative (-) --> Terminal 2 (MV) Turns downward (B) Battery positive (+) --> Terminal 6 (MH) Battery negative (-) --> Terminal 1 (M+) Turns left (C) Battery positive (+) --> Terminal 1 (M+) Battery negative (-) --> Terminal 6 (MH) Turns right (D) Inspect outer mirror heater operation. Apply battery voltage and check operation of the mirror face, as shown in the table and illustration. Standard MEASUREMENT - SPECIFIED CONDITION Measurement Condition Specified Condition Battery positive (+) --> Terminal 7 (HTR+) Battery negative (-) --> Terminal 3 (HTR-) Mirror surface temperature becomes higher Inspect electrochromic outer mirror operation. Apply battery voltage and check operation of the mirror face, as shown in the table and illustration. Standard MEASUREMENT - SPECIFIED CONDITION Measurement Condition Specified Condition Battery positive (+) --> Terminal 4 (EC+) Battery negative (-) --> Terminal 5 (EC-) Mirror surface changes to dark

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1. INSTALL OUTER REAR VIEW MIRROR Connect each connector. Engage the 2 claws on the upper part of the outer rear view mirror. Engage the 2 claws on the lower part of the outer rear view mirror as shown in the illustration, and install the outer rear view mirror.
2. INSTALL OUTER REAR VIEW MIRROR ASSEMBLY Install the outer rear view mirror assembly with the 3 bolts. Torque: 8.0 N*m (82 kgf*cm, 71 in.*lbf) Connect the connector and install the clamp.
3. REMOVE FRONT DOOR TRIM BOARD SUB-ASSEMBLY
4. REMOVE FRONT DOOR LOWER FRAME BRACKET GARNISH
5. REMOVE DOOR ARMREST COVER
6. REMOVE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY
7. REMOVE FRONT DOOR INSIDE HANDLE BEZEL PLUG

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1. INSPECT OUTER MIRROR SWITCH (W/ MEMORY SEAT) Inspect the outer mirror switch. Measure the resistance according to the value(s) in the table below when the switch is operated. Standard resistance TESTER CONNECTION - SPECIFIED CONDITION (RESISTANCE) Tester Connection Switch Position Specified Condition 2 - 3 OFF 10 kohms or higher UP 225 to 275 ohms DOWN 437 to 503 ohms LEFT 744 to 856 ohms RIGHT 437 to 503 ohms 1 - 2 L 90 to 110 ohms R 10 ohms or less
2. INSPECT OUTER MIRROR SWITCH (W/O MEMORY SEAT) Inspect the outer mirror switch. Measure the resistance according to the value(s) in the table below when the switch is operated. Standard resistance: Select "L" on the left/right adjustment switch TESTER CONNECTION - SPECIFIED CONDITION (RESISTANCE) Tester Connection Switch Position Specified Condition 4 - 8 UP Below 1 ohms 6 - 7 4 - 7 DOWN 6 - 8 5 - 8 LEFT 6 - 7 5 - 7 RIGHT 6 - 8 Select "R" on the left/right adjustment switch TESTER CONNECTION - SPECIFIED CONDITION (RESISTANCE) Tester Connection Switch Position Specified Condition 3 - 8 UP Below 1 ohms 6 - 7 3 - 7 DOWN 6 - 8 2 - 8 LEFT 6 - 7 2 - 7 RIGHT 6 - 8