AIR CONDITIONING SYSTEM(for Manual Air Conditioning System) Recirculation Damper Servo Motor Circuit

DESCRIPTION

The No. 1 blower damper servo sub-assembly and No. 1 heater control sub-assembly are powered through the HTR-IG fuse. Operating the No. 1 heater control sub-assembly drives the the No. 1 blower damper servo sub-assembly to switch between fresh and recirculation mode.

WIRING DIAGRAM

A01V7W2E05

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE


  1. INSPECT NO. 1 BLOWER DAMPER SERVO SUB-ASSEMBLY


    1. Remove the No. 1 blower damper servo sub-assembly.

      Click here

    2. Connect a positive (+) lead from the battery to terminal 5 (IG+) and negative (-) lead to terminal 2 (FRS), then check that the arm turns to the fresh side smoothly.

    3. Connect a positive (+) lead from the battery to terminal 5 (IG+) and negative (-) lead to terminal 1 (REC), then check that the arm turns to the recirculation side smoothly.

      A01V6TVC03
      *a Recirculation Position *b Fresh Position
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE RECIRCULATION DAMPER SERVO SUB-ASSEMBLY Click here

    OK

  2. INSPECT NO. 1 HEATER CONTROL SUB-ASSEMBLY


    1. A01VAP7C01
      *a Recirculation/Fresh Switch

      Measure the resistance.


      1. Remove the No. 1 heater control sub-assembly.

        Click here

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

        Standard Resistance
        Tester Connection Switch Condition Specified Condition
        3 (FRS) - 4 (REC) Recirculation/fresh switch off Below 1 Ω
        3 (FRS) - 4 (REC) Recirculation/fresh switch on 10 kΩ or higher
        5 (LED+) - 4 (REC) Recirculation/fresh switch off 10 kΩ or higher
        5 (LED+) - 4 (REC) Recirculation/fresh switch on Below 1 Ω

    2. Check that the indicator light comes on.


      1. Turn the recirculation/fresh switch to the on position.

      2. Connect a positive (+) lead from the battery to terminal 2 (A/C+) and negative (-) lead to terminal 4 (REC), and check that the indicator light comes on.

        OK
        The indicator light comes on.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE NO. 1 HEATER CONTROL SUB-ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (NO. 1 BLOWER DAMPER SERVO SUB-ASSEMBLY - BATTERY)


    1. A01V9DSC01
      *a

      Front view of harness connector

      (to No. 1 Blower Damper Servo Sub-assembly)

      Disconnect the No. 1 blower damper servo sub-assembly connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      G65-5 (IG+) - Body ground Ignition switch off Below 1 V
      G65-5 (IG+) - Body ground Ignition switch ON 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (NO. 1 HEATER CONTROL SUB-ASSEMBLY - BATTERY)


    1. A01V8XOC01
      *a

      Front view of wire harness connector

      (to No. 1 Heater Control Sub-assembly)

      Disconnect the No. 1 heater control sub-assembly connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      G22-2 (A/C+) - Body ground Ignition switch off Below 1 V
      G22-2 (A/C+) - Body ground Ignition switch ON 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (NO. 1 HEATER CONTROL SUB-ASSEMBLY - BODY GROUND)


    1. A01V8XOC02
      *a

      Front view of wire harness connector

      (to No. 1 Heater Control Sub-assembly)

      Disconnect the No. 1 heater control sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G22-4 (REC) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK HARNESS AND CONNECTOR (NO. 1 HEATER CONTROL SUB-ASSEMBLY - NO. 1 BLOWER DAMPER SERVO SUB-ASSEMBLY)


    1. Disconnect the G22 No. 1 heater control sub-assembly connector.

    2. Disconnect the G65 No. 1 blower damper servo sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G22-3 (FRS) - G65-2 (FRS) Always Below 1 Ω
      G22-5 (LED+) - G65-1 (REC) Always Below 1 Ω
      G22-3 (FRS) - Body ground Always 10 kΩ or higher
      G22-5 (LED+) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR