Inspection Procedure

1. Disconnect the radio receiver connector R1 or R2.
2. Measure the resistance according to the value in the table below.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   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 

   VOLTAGE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   +B - GND ((1))	Always	10 to 14 V
   B - GND ((2))	Always	10 to 14 V
   ACC - GND	Ignition SW ACC	10 to 14 V
   (1) 6 Speaker (2) 10 Speaker

Fig 1: Identifying Radio Receiver Connector R1 Or R2
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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