Inspection Procedure

1. Disconnect the ACC and ECU-IG RH fuses from the driver side junction block
2. Disconnect the ECU-B fuse from the engine room junction block.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   FUSE (ACC, ECU-IG, ECU-B)
   
   

   Tester Connection	Condition	Specified Condition
   ACC fuse	Always	Below 1 Ω
   ECU-IG fuse	Always	Below 1 Ω
   ECU-B fuse	Always	Below 1 Ω

   NG: REPLACE FUSE 

   OK: Go to Next Step 

1. Disconnect the ACC CUT relay from the engine room relay block.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   RELAY
   
   

   Tester Connection	Condition	Specified Condition
   3 - 4	Always	Below 1 Ω
   3 - 4	Battery voltage is applied to terminal 1 - 2	10 kΩ or higher

   Fig 1: Identifying Relay Circuit Diagram

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPLACE RELAY 

   OK: Go to Next Step 

1. Disconnect the G3 ECU connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   GATEWAY ECU - BATTERY AND BODY GROUND RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   G3-14 (GND) - Body ground	Always	Below 1 Ω
   G3-14 (GND) - Body ground	Always	Below 1 Ω

   Fig 2: Identifying G3 ECU Connector

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

Standard voltage 

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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