Inspection Procedure

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

   Standard resistance 

   STANDARD RESISTANCE
   
   

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

   Fig 1: Checking Combination Meter (Power Source System)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Measure the voltage of the wire harness side connector.

   Standard voltage 

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

   Standard resistance 

   STANDARD RESISTANCE
   
   

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

NG : Go to step 3 

Fig 2: Checking Combination Meter (Automatic Light Control Sensor System)

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
   
   

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

   Fig 3: Checking Automatic Light Control Sensor

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK : REPLACE AUTOMATIC LIGHT CONTROL SENSOR