Entire Combination Meter does not Operate: Wiring Diagram

1. Disconnect the K31 connector.
2. Measure the resistance of the wire harness side connector.

   Standard resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Terminal No.	Condition	Specified Condition
   K31-20 - Body ground	Always	Below 1 Ω

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

   Standard voltage 

   STANDARD VOLTAGE SPECIFICATION
   
   

   Terminal No.	Condition	Specified Condition
   K31-1 - Body ground	Engine switch on (IG)	10 to 14 V
   K31-21 - Body ground	Always	10 to 14 V
   K31-22 - Body ground	Always	10 to 14 V

NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 

Fig 2: Identifying K31 Connector Terminal 20, 21, 22

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : GO TO NEXT STEP 

1. Disconnect the K31 connector.
2. Measure the resistance of the wire harness side connector.

   Standard resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Terminal No.	Condition	Specified Condition
   K31-36 - Body ground	Always	10 kΩ or higher

NG : Go to step 3 

Fig 3: Identifying K31 Connector Terminal 36

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : REPLACE COMBINATION METER 

1. Disconnect the V34 automatic light control sensor connector.
2. Disconnect the K31 connector.
3. Measure the resistance of the wire harness side connector.

   Standard resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Terminal No.	Condition	Specified Condition
   K31-36 - K31-18	Always	10 kΩ or higher

NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 

Fig 4: Identifying K31 Connector Terminal 19 And 36

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : REPLACE AUTOMATIC LIGHT CONTROL SENSOR