Inspection Procedure

1. Disconnect the ECU-B and ACC fuses from the driver side junction block.
2. Measure the resistance of the fuses.

   Standard resistance: 

   Below 1 Ω 

NG : REPLACE FUSE 

OK : GO TO NEXT STEP 

1. Disconnect the M13 connector.
2. Measure the resistance of the wire harness side connector.

   Standard resistance 

   RESISTANCE AND RECEIVER CONDITION SPECIFICATION
   
   

   Tester Connection	Specified Condition
   M13-1 (GND) - Body ground* 1	Below 1 Ω
   M13-3 (GND1) - Body ground* 2	Below 1 Ω

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

   Standard voltage 

   VOLTAGE AND RECEIVER CONDITION SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   M13-2 (ACC) - Body ground* 1	Power switch ON (ACC)	10 to 14 V
   M13-3 (+B1) - Body ground* 1	Always	10 to 14 V
   M13-11 (ACC) - Body ground* 2	Power switch ON (ACC)	10 to 14 V
   M13-12 (B1) - Body ground* 2	Always	10 to 14 V

   HINT:

   • ^* 1: for 4 Connector type
   • ^* 2: for 3 Connector type

NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 

Fig 1: Checking Wire Harness (Multi-Display - Battery And Body Ground)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : GO TO NEXT STEP 

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE