On-Vehicle Inspection

WARNING: This page is about a different car, the 2002 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.

Remove center cluster integration panel. See REMOVAL .
Inspect A/C control assembly circuit.
1. Disconnect the connector from the A/C control assembly and inspect the connector on the wire harness side, as shown in Fig 1.
  
  Fig 1: Displaying Wire Harness Side Of Terminal
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Test condition: Turn ignition switch to ON
  
  Fig 2: Testing Connections Based On Conditions
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If circuit is as specified, try replacing the amplifier with a new one. If the circuit is not as specified, inspect the circuits connected to other parts.
2. Connect the connector to A/C control assembly and inspect wire harness side from the back side, as shown in the chart below.
  
  Fig 3: Displaying Wire Harness Side Of Terminal
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Test condition:
  - Run engine at idle speed
  - Set on manifold gauge set
    
    Fig 4: Testing Connections Based On Conditions
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    If circuit is as specified, try replacing the amplifier with a new one. If the circuit is not as specified, inspect the circuits connected to other parts.