Inspection Procedure

1. Check the DATA LIST for proper functioning of the outer rear view mirror.

   Driver side junction block (driver side junction block ECU) 

   DATA LIST REFERENCE
   
   

   Item	Measurement Item/ display (Range)	Normal Condition	Diagnostic Note
   MIRR SEL SW R	Mirror selection switch signal for RH mirror/ ON or OFF	ON: Switch is in R position OFF: Switch is in neutral or L position	-
   MIRR SEL SW L	Mirror selection switch signal for LH mirror/ ON or OFF	ON: Switch is in L position OFF: Switch is in neutral or R position	-
   MIRR POS SW R	Mirror position switch signal (RIGHT)/ ON or OFF	ON: RIGHT switch is ON OFF: Any switch except RIGHT is ON or all switches are OFF	-
   MIRR POS SW L	Mirror position switch signal (LEFT)/ ON or OFF	ON: LEFT switch is ON OFF: Any switch except LEFT is ON or all switches are OFF	-
   MIRR POS SW UP	Mirror position switch signal (UP)/ ON or OFF	ON: UP switch 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: DOWN switch is ON OFF: Any switch except DOWN is ON or all switches are OFF	-

   OK: On tester screen, each item changes between ON and OFF according to above chart. 

OK: REPLACE DRIVER SIDE JUNCTION BLOCK 

NG: Go to Next step 

Fig 1: Inspecting Outer Mirror Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Select L or R on the mirror master switch.
2. Measure the resistance of the switch.

   Standard resistance: 

   Mirror master switch 

   RESISTANCE REFERENCE
   
   

   Tester Connection	Switch Condition	Specified Condition
   8 (MSW) - 9 (E)	L	100 Ω
   8 (MSW) - 9 (E)	R	Below 1 Ω
   8 (MSW) - 9 (E)	OFF	10 kΩ or higher

   Mirror control switch 

   MIRROR CONTROL SWITCH SPECIFICATION
   
   

   Tester Connection	Switch Condition	Specified Condition
   7 (M+) - 9 (E)	UP	Approx. 100 Ω
   7 (M+) - 9 (E)	RIGHT	250 Ω
   7 (M+) - 9 (E)	DOWN	470 Ω
   7 (M+) - 9 (E)	LEFT	800 Ω
   7 (M+) - 9 (E)	OFF	10 kΩ or higher

NG: REPLACE OUTER MIRROR SWITCH 

OK: Go to Next step 

1. Disconnect the R4 switch connector.
2. Disconnect the D5 ECU connector.
   Fig 2: Identifying R4 Switch Connector Terminals And D5 ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   RESISTANCE REFERENCE
   
   

   Tester Connection	Specified Condition
   R4-7 (M+) - D5-11 (M+)	Below 1 Ω
   R4-8 (MSW) - D5-10 (MSW)	Below 1 Ω
   R4-9 (E) - D5-7 (R/E)	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE DRIVER SIDE JUNCTION BLOCK (DRIVER SIDE JUNCTION BLOCK ECU)