Inspection Procedure

1. Remove the RADIO NO. 2 and TV fuses from the passenger side junction block.
2. Remove the AM1 fuse from the driver side junction block.
3. Measure the resistance of the fuses.

   Standard resistance: 

   Below 1 Ω 

   NG: REPLACE FUSE 

   OK: Go to next step 

1. Remove the ACC relay from the passenger side junction block.
2. Measure the resistance of the relay.
   Fig 1: Measuring Resistance Between Relay Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   3 - 5	Below 1 Ω
   3 - 5	10 kΩ or higher (when battery voltage is applied to terminals 1 and 2)

NG: REPLACE RELAY 

OK: Go to next step 

1. Disconnect the N3 and N7 ECU connectors.
   Fig 2: Identifying N3 And N7 ECU Connectors Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance and voltage of the wire harness side connectors.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   N3-17 (GND1) - Body ground	Below 1 Ω
   N7-7 (SNSE) - Body ground	Below 1 Ω

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   N3-18 (ACC) - Body ground	Ignition switch ACC	10 to 14 V
   N3-9 (+B) - Body ground	Always	10 to 14 V

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE OR DIAGNOSTIC TROUBLE CODE CHART