On-Vehicle Inspection

WARNING: This page is about a different car, the 2002 Toyota MR2. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect Combination Meter
Disconnect ECM. See REMOVAL & INSTALLATION (MR2) .
Inspect A/C Conditioning Control System Circuit
1. Disconnect the connector from the combination meter and inspect the connector on the wire harness side, as shown in Fig 1.
  Test condition:
  
  Turn ignition switch to ON
  
  Fig 1: Inspecting Combination Meter Connectors
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 2: Displaying Connection Conditions
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  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 Fig 3.
  Test condition:
  - Run engine at idle speed
  - Switch on manifold gauge set
    
    Fig 3: Inspecting Combination Meter Connections
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Fig 4: Displaying Connection Conditions
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  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 Fig 5.
  
  Fig 5: Inspecting Wire Harness Side Connector Of the ECM
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 6: Displaying Connection Conditions
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
If the circuit is not as specified, inspect the circuits connected to other parts.
Reconnect ECM. See REMOVAL & INSTALLATION (MR2) .
Reconnect Combination Meter