Inspection Procedure

1. Check the resistance.

   Standard: Built-in AMP 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   GND (R1-7) - Body ground	Constant	Below 1

   Standard: Separate AMP 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   GND (R1-20) - Body ground	Constant	Below 1

   Fig 1: Identifying GND & ACC Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the ignition switch to the ACC position.
3. Measure the voltage.

   Standard: Built-in AMP 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   B (R1-4) - GND (R1-7)	Constant	10 to 14 V
   ACC (R1-3) - GND (R1-7)	Ignition switch ACC or ON	10 to 14 V

   Standard: Separate AMP 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   B (R1-1) - GND (R1-20)	Constant	Below 1
   ACC (R1-11) - GND (R1-20)	Ignition switch ACC or ON	10 to 14 V

   Fig 2: Identifying ACC Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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