Power Mirror Control System (W/ Memory) - Power Mirror Cannot Be Adjusted With Power Mirror Switch
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK DTCs
INSPECT OUTER MIRROR SWITCH
CHECK WIRE HARNESS (OUTER MIRROR SWITCH - MAIN BODY ECU RH)
PERFORM ACTIVE TEST BY INTELLIGENT TESTER
INSPECT OUTER REAR VIEW MIRROR ASSEMBLY
POWER MIRROR CONTROL SYSTEM (w/ Memory) - Power Mirror cannot be Adjusted with Power Mirror Switch
DESCRIPTION
A switch signal of the outer mirror switch is transmitted to the selected outer mirror control ECU by way of the main body ECU RH. Then, the outer mirror control ECU activates the mirror motor to move the mirror UP, DOWN, RIGHT and LEFT in response to the input.
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.
- 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).
WIRING DIAGRAM
INSPECTION PROCEDURE
Select the DTC check on the intelligent tester to check for communication errors.
- Result:
| Not output DTC codes | A |
| Output DTC codes | B |
| | GO TO MULTIPLEX COMMUNICATION SYSTEM |
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| 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.
- Resistance:
| Tester Connection | Switch Position | Specified Condition |
| 2 - 3 | OFF | 10 kΩ or higher |
| UP | 225 to 275 Ω |
| DOWN | 437 to 503 Ω |
| LEFT | 744 to 856 Ω |
| RIGHT | 437 to 503 Ω |
| 1 - 2 | L | 90 to 110 Ω |
| R | 10 Ω or less |
| | REPLACE OUTER MIRROR SWITCH |
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| 3.CHECK WIRE HARNESS (OUTER MIRROR SWITCH - MAIN BODY ECU RH) |
Disconnect the M8 (*L15) and J74 connectors.
Measure the resistance according to the value(s) in the table below.
( *): RHD models
- Resistance:
- LHD models:
| Tester Connection | Condition | Specified Condition |
| M8-3 (M+) - J74-11 (MIRB) | Always | Below 1 Ω |
| M8-1 (MSW) - J74-12 (MIRS) | Always | Below 1 Ω |
| M8-2 (E) - J74-3 (MIRE) | Always | Below 1 Ω |
| M8-3 (M+) - Body ground | Always | 10 kΩ or higher |
| M8-1 (MSW) - Body ground | Always | 10 kΩ or higher |
| M8-2 (E) - Body ground | Always | 10 kΩ or higher |
- RHD models:
| Tester Connection | Condition | Specified Condition |
| L15-3 (M+) - J74-11 (MIRB) | Always | Below 1 Ω |
| L15-1 (MSW) - J74-12 (MIRS) | Always | Below 1 Ω |
| L15-2 (E) - J74-3 (MIRE) | Always | Below 1 Ω |
| L15-3 (M+) - Body ground | Always | 10 kΩ or higher |
| L15-1 (MSW) - Body ground | Always | 10 kΩ or higher |
| L15-2 (E) - Body ground | Always | 10 kΩ or higher |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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| OK | |
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| REPLACE OUTER MIRROR CONTROL ECU |
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| 4.PERFORM ACTIVE TEST BY INTELLIGENT TESTER |
Select the ACTIVE TEST, use the intelligent tester to issue a control command, and then check the outer rear view mirrors.
- Mirror-L/Mirror-R:
| Item | Test Details |
| Mirror Up/Down | Mirror vertical operation: UP/DOWN |
| Mirror Right/Left | Mirror horizontal operation: RIGHT/LEFT |
| | PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE |
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| 5.INSPECT OUTER REAR VIEW MIRROR ASSEMBLY |
Outer rear view mirror LH:
Disconnect the h1 connector.
Apply battery voltage and check operation of the mirror face.
- Standard:
| Measurement Condition | Mirror Operation |
Battery positive (+) → h1-1 (MV)
Battery negative (-) → h1-10 (M+) | Turns upward (A) |
Battery positive (+) → h1-10 (M+)
Battery negative (-) → h1-1 (MV) | Turns downward (B) |
Battery positive (+) → h1-9 (MH)
Battery negative (-) → h1-10 (M+) | Turns left (C) |
Battery positive (+) → h1-10 (M+)
Battery negative (-) → h1-9 (MH) | Turns right (D) |
Outer rear view mirror RH:
Disconnect the g1 connector.
Apply battery voltage and check operation of the mirror face.
- Standard:
| Measurement Condition | Mirror Operation |
Battery positive (+) → g1-1 (MV)
Battery negative (-) → g1-10 (M+) | Turns upward (A) |
Battery positive (+) → g1-10 (M+)
Battery negative (-) → g1-1 (MV) | Turns downward (B) |
Battery positive (+) → g1-9 (MH)
Battery negative (-) → g1-10 (M+) | Turns left (C) |
Battery positive (+) → g1-10 (M+)
Battery negative (-) → g1-9 (MH) | Turns right (D) |
| | REPLACE OUTER REAR VIEW MIRROR ASSEMBLY |
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| OK | |
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| REPLACE OUTER MIRROR CONTROL ECU |
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LEXUS IS250, IS220d / GSE20 ALE20
