Inspection Procedure

1. Check the DATA LIST for proper functioning of the mirror retract switch.

   Driver side junction block ECU: 

   DATA LIST REFERENCE
   
   

   Item	Measurement Item / Range (Display)	Normal Condition	Diagnostic Note
   MIRR FOLD SW	Mirror retract signal / ON or OFF	ON: Switch is ON OFF: Switch is OFF	-
   MIRR RETRN SW	Mirror return signal / ON or OFF	ON: Switch is OFF OFF: Switch is ON	-

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

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

NG: Go to Next step 

Fig 1: Inspecting Outer Mirror Switch Assembly

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Measure the resistance of the switch.

   Standard resistance 

   RESISTANCE REFERENCE
   
   

   Tester Connection	Switch Condition	Specified Condition
   4 - 5	ON (Retract)	10 kΩ or higher
   4 - 5	OFF (Return)	Below 1 Ω

NG: REPLACE OUTER MIRROR SWITCH ASSEMBLY 

OK: Go to Next step 

1. Disconnect the M4 switch connector.
2. Disconnect the D5 ECU connector.
   Fig 2: Identifying D5 ECU Connector Terminals And M4 Switch 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
   M4-4 - D5-8 (RET)	Below 1 Ω
   M4-5 - Body ground	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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