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Air Conditioning Control Assembly: Inspection

  1. INSPECT INDICTOR OPERATION 

    Connect the positive (+) lead from the battery to terminal 4 and negative (-) lead to each terminal, then check that the indicator lights up as shown in the chart.

    SWITCH TESTER CONNECTION

    Switch Tester connection
    DEF 13
    FRESH 12
    RECIRC 11
    A/C 10

    If operation is not as specified, replace the P/C board.

    Fig 1: Connecting Positive (+) Lead From Battery To Terminal 4 And Negative (-) Lead To Each Terminal
    G02945982Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT INDICATOR DIMMING OPERATION 
    1. Perform each indicator light up (See step  1).
    2. Connect the positive (+) lead from the battery to terminal 1 and check that the each indicator dims.

    If the operation is not as specified, replace the P/C board.

    If the operation is as specified, replace the A/C amplifier.

  3. INSPECT BULB OPERATION 

    Apply the tester as shown in the illustration to the test for continuity.

    If continuity exists, replace the P/C board.

    If on continuity exists, replace the bulb.

    Fig 2: Inspecting Bulb Operation
    G02945983Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSPECT SWITCH OPERATION 

    Check the continuity exists between terminals while the switch is pressed.

    SWITCH TESTER CONNECTION

    Switch Tester connection Specified condition
    A/C 15-21 Continuity
    DEF 16-21 Continuity
    F/R 17-21 Continuity

    If operations is not as specified, replace the P/C board.

    If operations is as specified, check the wire harness or replace the A/C amplifier.

    Fig 3: Inspecting Switch Operation
    G02945984Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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