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

DTC Code DTC Name
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

E253802E03

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.

      E277706C01

      *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. E277674C01

      *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 hereClick 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 hereClick 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 hereClick here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR