Multi-display Power Source Circuit: Wiring Diagram

The wiring diagram is shown below.

Fig 1: Multi-Display Power Source Circuit - Wiring Diagram

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. INSPECT FUSE (TV, ACC, ECU-IG RH) 
   1. Remove the TV fuse from the cowl side junction block LH.
   2. Remove the ACC and ECU-IG RH fuses from the cowl side junction block RH.
   3. Measure the resistance of the fuses.

      Standard resistance: Below 1 Ω 

   NG : REPLACE FUSE 

   OK : GO TO NEXT STEP 

2. CHECK WIRE HARNESS (MULTI-DISPLAY - BATTERY AND BODY GROUND) 
   1. Disconnect the K46 and K47 multi-display connectors.
   2. Measure the voltage of the wire harness side connector.

      Standard voltage 

      TESTER CONNECTION AND SPECIFIED CONDITION CHART
      
      

      Tester Connection	Condition	Specified Condition
      K46-1 (+B1) - Body ground	Always	10 to 14 V
      K46-2 (ACC) - Body ground	Engine switch on (ACC)	10 to 14 V
      K46-3 (IG) - Body ground	Engine switch on (IG)	10 to 14 V

   3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION CHART
      
      

      Tester Connection	Condition	Specified Condition
      K47-12 (SGND) - Body ground	Always	Below 1 Ω
      K46-10 (GND1) - Body ground	Always	Below 1 Ω
      K47-12 (SNSE) - Body ground	Always	Below 1 Ω

   NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 

   Fig 2: Identifying K46 And K47 Multi-Display Connectors Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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