Inspection Procedure

1. Disconnect the RAD NO. 3 fuse from the main body ECU LH.
2. Disconnect the ACC fuse from the main body ECU RH.
3. Measure the resistance of the fuses.

   Standard resistance: 

   Below 1 Ω 

NG: REPLACE FUSE 

OK: Go to next step 

1. Disconnect the K54 receiver connector.
2. Measure the resistance of the wire harness side connector.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   KS4-20 (GND) - Body ground	Below 1 Ω

3. Measure the voltage of the wire harness side connector.

   Standard voltage 

   VOLTAGE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   K54-1 (B) - Body ground	Always	10 to 14 V
   K54-11 (ACC) - Body ground	Engine switch on (ACC)	10 to 14 V

Fig 1: Identifying Radio Receiver Connector 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