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

DTC Code DTC Name
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

E253802E05

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.

      E261703C03

      *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. E269925C01

      *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. E185641C01

      *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. E269926C01

      *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. E269926C02

      *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 hereClick hereClick here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR