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

DTC Code DTC Name
Recirculation Damper Servo Motor Circuit

DESCRIPTION

The damper servo sub-assembly and heater control base sub-assembly (air inlet control switch) are powered through the HTR-IG fuse. Operating the heater control base sub-assembly (air inlet control switch) drives the damper servo sub-assembly to switch between "FRESH" and "RECIRCULATION".

WIRING DIAGRAM

E185640E01

CAUTION / NOTICE / HINT

Note:

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

PROCEDURE

  1. INSPECT DAMPER SERVO SUB-ASSEMBLY

    1. E354521E01

      Remove the damper servo sub-assembly (Click here).

    2. Apply battery voltage to the damper servo motor and check the operation of the damper servo sub-assembly.

      OK

      Measurement Condition

      Specified Condition

      Battery positive (+) → Terminal 5

      Battery negative (-) → Terminal 2

      Arm turns to the "FRESH" side smoothly

      Battery positive (+) → Terminal 5

      Battery negative (-) → Terminal 1

      Arm turns to the "RECIRCULATION" side smoothly

    REPLACE DAMPER SERVO SUB-ASSEMBLY

    (Click here)

  2. CHECK HARNESS AND CONNECTOR (DAMPER SERVO - BATTERY)

    1. U123916E01

      Disconnect the H63 servo connector.

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      H63-5 (IG+) - Body ground

      Ignition switch off

      Below 1 V

      H63-5 (IG+) - Body ground

      Ignition switch ON

      11 to 14 V
      Table 1. Text in Illustration

      *1

      Front view of wire harness connector

      (to Damper Servo Sub-assembly)

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  3. CHECK HARNESS AND CONNECTOR (HEATER CONTROL BASE - BATTERY AND BODY GROUND)

    1. U123638E01

      Disconnect the H64 heater control connector.

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      H64-2 (A/C+) - Body ground

      Ignition switch off

      Below 1 V

      H64-2 (A/C+) - Body ground

      Ignition switch ON

      11 to 14 V

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      H64-4 (REC) - Body ground

      Always

      Below 1 Ω
    Table 2. Text in Illustration

    *1

    Front view of wire harness connector

    (to Heater Control Base [Air Inlet Control Switch])

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. CHECK HARNESS AND CONNECTOR (HEATER CONTROL BASE - DAMPER SERVO)

    1. E354523E01

      Disconnect the H63 servo connector.

    2. Disconnect the H64 heater control connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      H64-3 (FRS) - H63-2 (FRS)

      Always

      Below 1 Ω

      H64-5 (LED+) - H63-1 (REC)

      Always

      Below 1 Ω

      H64-3 (FRS) - Body ground

      Always

      10 kΩ or higher

      H64-5 (LED+) - Body ground

      Always

      10 kΩ or higher
      Table 3. Text in Illustration

      *1

      Front view of wire harness connector

      (to Damper Servo Sub-assembly)

      *2

      Front view of wire harness connector

      (to Heater Control Base [Air Inlet Control Switch])

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    (Click here)

    REPAIR OR REPLACE HARNESS OR CONNECTOR