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

DESCRIPTION

The recirculation 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 recirculation damper servo sub-assembly to switch between fresh and recirculation mode.

WIRING DIAGRAM

A01TDS0E03

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. INSPECT RECIRCULATION DAMPER SERVO SUB-ASSEMBLY


    1. Remove the recirculation damper servo sub-assembly.

      Click here

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

      A01TDRTC01
      *A for LHD *B for RHD
      *a

      Component without harness connected

      (Recirculation Damper Servo Sub-assembly)

      		 *b Recirculation Position
      *c 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. A01TDF0C01
      *a

      Component without harness connected

      (No. 1 Heater Control Sub-assembly)
      *b 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 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 the indicator light.


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

      2. Connect a positive (+) lead from the battery to terminal 2 (A/C+) and a 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 (RECIRCULATION DAMPER SERVO SUB-ASSEMBLY - IG POWER SOURCE)


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

      Standard Voltage
      Tester Connection Condition Specified Condition
      E68-5 (IG+) - Body ground Ignition switch off Below 1 V
      E68-5 (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 - IG POWER SOURCE)


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

      Standard Voltage
      Tester Connection Condition Specified Condition
      E69-2 (A/C+) - Body ground Ignition switch off Below 1 V
      E69-2 (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. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      E69-4 (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. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      E69-3 (FRS) - E68-2 (FRS) Always Below 1 Ω
      E69-5 (LED+) - E68-1 (REC) Always Below 1 Ω
      E69-3 (FRS) - Body ground Always 10 kΩ or higher
      E69-5 (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