Inspection Procedure

1. Disconnect the radio receiver connector.
   Fig 1: Identifying Radio Receiver Connector

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

   Standard resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

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

3. Measure the voltage according to the value (s) in the table below.

   Standard voltage 

   STANDARD VOLTAGE SPECIFICATION
   
   

   Tester connection	Condition	Specified condition
   +B-GND	Always	10 to 14 V
   B-GND ((1))	Always	10 to 14 V
   ACC-GND	Ignition switch ACC	10 to 14 V
   (1) for Separate Type Amplifier System

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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