Inspection Procedure

1. Disconnect the R26 (R27) connector.
2. Measure the voltage and resistance according to the value(s) in the table below.

   Outer mirror control ECU LH: 

   Standard voltage 

   VOLTAGE SPECIFICATION TABLE
   
   

   Tester Connection	Condition	Specified Condition
   R26-3 (BDR) - Body ground	Always	10 to 14 V
   R26-7 (CPUB) - Body ground	Always	10 to 14 V
   R26-8 (SIG) - Body ground	Ignition switch ON	10 to 14 V

   Fig 1: Identifying R26 (R27) Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance 

   RESISTANCE REFERENCE TABLE
   
   

   Tester Connection	Condition	Specified Condition
   R26-1 (GND) - Body ground	Always	Below 1 Ω

   Outer mirror control ECU RH: 

   Standard voltage 

   VOLTAGE SPECIFICATION TABLE
   
   

   Tester Connection	Condition	Specified Condition
   R27-3 (BDR) - Body ground	Always	10 to 14 V
   R27-7 (CPUB) - Body ground	Always	10 to 14 V
   R27-8 (SIG) - Body ground	Ignition switch ON	10 to 14 V

   Standard resistance 

   RESISTANCE REFERENCE TABLE
   
   

   Tester Connection	Condition	Specified Condition
   R27-1 (GND) - Body ground	Always	Below 1 Ω

NG: REPAIR OR REPLACE WIRE HARNESS 

OK: REPLACE OUTER MIRROR CONTROL ECU