On-Vehicle Inspection

1. Disconnect the connector from the combination meter and inspect the connector on the wire harness side, as shown in the diagram below.

   Test condition:

   1. Turn ignition switch to ON
   Fig 1: Identifying Combination Meter Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   COMBINATION METER CONTINUITY TABLE
   
   

   Tester connection	Condition	Specified condition
   B8 - Ground	Constant	Continuity
   C1 - C4	Evaporator temperature at 25°C (77°F)	1.5 kΩ

   If the circuit is not as specified, inspect the circuits connected to other parts.

2. Reconnect the connector to combination meter and inspect the wire harness side from the back side, as shown in the diagram below.

   Test condition:

   • Run engine at idle speed
   • Set on manifold gauge set
   Fig 2: Connecting Connector To Combination Meter

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   COMBINATION METER CONTINUITY TABLE
   
   

   Tester connection	Condition	Specified condition
   B13-Ground	A/C switch ON & Blower motor: operative	Below 1.0 V
   	A/C switch OFF	Battery positive voltage
   C10-Ground	Mode selector: DEF.	Below 1.0 V
   	Mode Selector: Except DEF.	Battery positive voltage
   C9-Ground	A/C switch ON	Below 1.0 V
   	A/C switch OFF	Battery positive voltage
   A1-Ground	Blower motor: Operative	Below 2.0 V
   	Blower motor: No operative	Battery positive voltage

   If the circuit is not as specified, inspect the circuits connected to other parts.

3. Inspect the wire harness side connector of the ECM from the back side, as shown in the diagram below.

Fig 3: Inspecting ECM Wire Harness Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If the circuit is not as specified, inspect the circuits connected to other parts.