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.

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).

WIRING DIAGRAM

INSPECTION PROCEDURE

1. READ VALUE OF INTELLIGENT TESTER

1. 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

OK	REPLACE OUTER MIRROR CONTROL ECU

NG

2. CHECK SEAT MEMORY SWITCH

1. Remove the seat memory switch.

2. 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

NG	REPLACE SEAT MEMORY SWITCH

OK

3. CHECK WIRE HARNESS (SEAT MEMORY SWITCH - OUTER MIRROR CONTROL ECU)

1. Disconnect the M6 (L7) and M10 (L10) switch connectors.

2. 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

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4. INSPECT OUTER REAR VIEW MIRROR ASSEMBLY

1. Outer rear view mirror LH:Disconnect the h1 connector.

2. 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)

3. Outer rear view mirror RH:Disconnect the g1 connector.

4. 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)

NG	REPLACE OUTER REAR VIEW MIRROR ASSEMBLY

OK
END