Power Mirror Control System (W/ Memory) - Power Mirrors Do Not Return To Memorized Position
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
READ VALUE OF INTELLIGENT TESTER
CHECK SEAT MEMORY SWITCH
CHECK WIRE HARNESS (SEAT MEMORY SWITCH - OUTER MIRROR CONTROL ECU)
INSPECT OUTER REAR VIEW MIRROR ASSEMBLY
POWER MIRROR CONTROL SYSTEM (w/ Memory) - Power Mirrors do not Return to Memorized Position
DESCRIPTION
When the seat memory switch M1, M2 or M3 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.
- 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
| 1.READ VALUE OF INTELLIGENT TESTER |
Check the DATA LIST for proper function of the seat memory switch.
- D-Seat:
| Item | Switch Position | Specified condition |
| Memory No1 | Driving position memorized in seat memory switch M 1/NOT MEM or MEM | MEM: Memorized
NOT MEM: Not memorized |
| Memory No2 | Driving position memorized in seat memory switch M 2/NOT MEM or MEM |
| Memory No3 | Driving position memorized in seat memory switch M 3/NOT MEM or MEM |
| | REPLACE OUTER MIRROR CONTROL ECU |
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| 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.
- Resistance:
| Tester Connection | Switch Condition | Specified Condition |
| 1 - 5 | "SET" switch ON | Below 1 Ω |
| 1 - 5 | "SET" switch OFF | 10 kΩ or higher |
| 2 - 5 | "1" switch ON | Below 1 Ω |
| 2 - 5 | "SET" switch OFF | 10 kΩ or higher |
| 3 - 5 | "2" switch ON | Below 1 Ω |
| 3 - 5 | "SET" switch OFF | 10 kΩ or higher |
| 4 - 5 | "3" switch ON | Below 1 Ω |
| 4 - 5 | "SET" switch OFF | 10 kΩ or higher |
| | REPLACE SEAT MEMORY SWITCH |
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| 3.CHECK WIRE HARNESS (SEAT MEMORY SWITCH - OUTER MIRROR CONTROL ECU) |
Disconnect the M6 (L7) and M10 (L10) switch connectors.
Measure the resistance according to the value(s) in the table below.
( ): RH side
- Resistance:
- LH side:
| Tester Connection | Condition | Specified Condition |
| M6-1 (MRY) - M10-25 (MM) | Always | Below 1 Ω |
| M6-2 (M1) - M10-22 (M1) | Always | Below 1 Ω |
| M6-3 (M2) - M10-23 (M2) | Always | Below 1 Ω |
| M6-4 (M3) - M10-24 (M3) | Always | Below 1 Ω |
| M6-5 (E) - Body ground | Always | Below 1 Ω |
- RH side:
| Tester Connection | Condition | Specified Condition |
| L7-1 (MRY) - L10-25 (MM) | Always | Below 1 Ω |
| L7-2 (M1) - L10-22 (M1) | Always | Below 1 Ω |
| L7-3 (M2) - L10-23 (M2) | Always | Below 1 Ω |
| L7-4 (M3) - L10-24 (M3) | Always | Below 1 Ω |
| L7-5 (E) - Body ground | Always | Below 1 Ω |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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| 4.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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LEXUS IS250, IS220d / GSE20 ALE20
