Entire Combination Meter Does Not Operate: Procedure

1. Disconnect the K31 meter connector.
   Fig 1: Identifying Combination Meter Connector Terminals And Body Ground

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

   Standard resistance

   Standard voltage 

   Tester Connection	Specified Condition
   K31-20 (ES) - Body ground	Below 1 Ω

   Tester Connection	Condition	Specified Condition
   K31-1 (IG+) - Body ground	Power switch ON (IG)	10 to 14 V
   K31-21 (B) - Body ground	Always	10 to 14 V
   K31-22 (B) - Body ground	Always	10 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the K31 meter connector.
   Fig 2: Identifying Automatic Light Control Sensor System Connector Terminals

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

   Standard resistance

   Tester Connection	Specified Condition
   K31-36 (MS5) - Body ground	10 kΩ or higher

OK → REPLACE COMBINATION METER 

NG: Go to next step 

1. Disconnect the V34 sensor connector.
   Fig 3: View Of V34 Sensor Connector Terminal

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

   Standard resistance

   Tester Connection	Specified Condition
   K31-16 (MS5) - K31-18 (MSG)	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE AUTOMATIC LIGHT CONTROL SENSOR