Mirror Switch Circuit: Procedure

1. Check the Data List for proper function of the outer mirror switches.
   BODY
   
   

   Tester Display	Measurement Item/Range	Normal Condition
   Mirror Selection SW (L)	Mirror selection switch signal for LH mirror/ON or OFF	ON: Switch is in Left position OFF: Switch is in neutral or Right position
   Mirror Selection SW (R)	Mirror selection switch signal for RH mirror/ON or OFF	ON: Switch is in Right position OFF: Switch is in neutral or Left position
   Mirror Position SW (L)	Mirror position switch signal (Left)/ON or OFF	ON: Switch L is ON OFF: Any switch except L is ON or all switches are OFF
   Mirror Position SW (R)	Mirror position switch signal (Right)/ON or OFF	ON: Switch R is ON OFF: Any switch except R is ON or all switches are OFF
   Mirror Position SW (Up)	Mirror position switch signal (Up)/ON or OFF	ON: Switch UP is ON OFF: Any switch except UP is ON or all switches are OFF
   Mirror Position SW (Dwn)	Mirror position switch signal (Down)/ON or OFF	ON: Switch DOWN is ON OFF: Any switch except DOWN is ON or all switches are OFF

NG → See step   2 

OK → CHECK AND REPLACE OUTER MIRROR CONTROL ECU 

1. Remove the outer mirror switch.
   Fig 1: Identifying Outer Mirror Switch Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below when the switch is operated.

   Standard 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

NG → REPLACE OUTER MIRROR SWITCH 

OK: Go to next step 

1. Disconnect the R5 and B4 connectors.
   Fig 2: Identifying Outer Mirror Switch & Body ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   R5-3 (M+) - B4-11 (MIRB)	Always	Below 1 Ω
   R5-1 (MSW) - B4-12 (MIRS)	Always	Below 1 Ω
   R5-2 (E1) - B4-3 (MIRE)	Always	Below 1 Ω
   R5-3 (M+) - Body ground	Always	10 kΩ or higher
   R5-1 (MSW) - Body ground	Always	10 kΩ or higher
   R5-2 (E1) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE. See  PROBLEM SYMPTOMS TABLE