Entire Combination Meter Does Not Operate: Procedure

1. Disconnect the K31 connector.
   Fig 1: Identifying K31 Connector Terminals 20, 21 & 22

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2. Measure the resistance of the wire harness side connector.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   K31-20 - Body ground	Always	Below 1 Ω

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

   Standard voltage

   Tester Connection	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 

OK: Go to next step 

1. Disconnect the K31 connector.
   Fig 2: Identifying K31 Connector Terminal 36

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

   Standard resistance

   Tester Connection	Condition	Specified Condition
   K31-36 - Body ground	Always	10 kΩ or higher

NG → See step   3 

OK → REPLACE COMBINATION METER 

1. Disconnect the V34 automatic light control sensor connector.
   Fig 3: Checking Automatic Light Control Sensor

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the K31 connector.
3. Measure the resistance of the wire harness side connector.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   K31-36 - K31-18	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK → REPLACE AUTOMATIC LIGHT CONTROL SENSOR