Radio Receiver Power Source Circuit: Wiring Diagram

1. Disconnect the radio receiver connector J66.
2. Measure the resistance according to the value in the table below.

   Standard resistance 

   TESTER CONNECTION AND SPECIFIED CONDITION CHART
   
   

   Tester connection	Condition	Specified condition
   GND - Body ground	Always	Below 1 Ω

3. Measure the voltage according to the values in the table below.

   Standard voltage 

   TESTER CONNECTION AND SPECIFIED CONDITION CHART
   
   

   Tester connection	Condition	Specified condition
   B - GND	Always	10 to 14 V
   ACC - GND	Engine switch on (ACC)	10 to 14 V

Fig 2: Identifying Radio Receiver Connector J66

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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