Inspection Procedure

1. Remove the ACC fuse from the main body ECU.
2. Remove the AM1 fuse and RADIO NO. 1 fuse from the engine room R/B.
3. Measure the resistance of the fuses.

   Standard resistance: Below 1 Ω 

4. Reinstall the fuses.

NG: REPLACE FUSE 

OK: Go TO NEXT STEP 

1. Disconnect the E41 receiver connector.
2. Measure the voltage.

   Standard voltage 

   VOLTAGE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   E41-4 (B) - Body ground	Always	11 to 14V
   E41-3 (ACC) - Body ground	Ignition switch ACC	11 to 14 V

3. Measure the resistance.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   E41-7 (GND) - Body ground	Below 1 Ω

   Fig 1: Identifying Radio Receiver Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Reconnect the receiver connector.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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