AIR MIX DAMPER CONTROL SWITCH INSPECTION


  1. INSPECT AIR MIX DAMPER CONTROL SWITCH


    1. A01BHH8E01

      Remove the air mix damper control switch and disconnect the connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Tester connection Condition Specified condition
      3 (IG) - 1 (E) Rr. DEF switch OFF 10 kΩ or higher
      3 (IG) - 1 (E) Rr. DEF switch ON Below 1 Ω
      3 (IG) - 2 (Rr DEF) Rr. DEF switch OFF 10 kΩ or higher
      3 (IG) - 2 (Rr DEF) Rr. DEF switch ON Below 1 Ω
      3 (IG) - 6 (MAX HOT) Except MAX HOT 10 kΩ or higher
      3 (IG) - 6 (MAX HOT) MAX HOT Below 1 Ω
      4 (ILL-) - 5 (ILL+) Always Below 1 Ω
      7 (V/B) - 8 (SG) MAX HOT 10 kΩ or higher
      7 (V/B) - 8 (SG) Except MAX HOT Below 1 Ω

      If the resistance value is not as specified, replace the air mix damper control switch.

    3. A01BARNE01

      Turn the heater control knob and measure the resistance between terminals 7 (V/B) and 8 (SG).

      OK
      The resistance changes as shown in the illustration.

      If the resistance value is not as specified, replace the air mix damper control switch.

    4. Connect the positive battery terminal to terminal 5 (ILL+), and the negative battery terminal to terminal 4 (ILL-).

      OK
      The illumination light comes on.

      If the resistance value is not as specified, replace the air mix damper control switch.

    5. Connect the positive battery terminal to terminal 3 (IG), and the negative battery terminal to terminal 1 (E).

      OK
      The indicator light comes on when the Rr DEF switch is turned on.

      If the resistance value is not as specified, replace the air mix damper control switch.