AIR CONDITIONING SYSTEM (for Manual Air Conditioning System) 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

A01ISCJE01

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. INSPECT DAMPER SERVO SUB-ASSEMBLY


    1. A01IURFE15

      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

    NG

    REPLACE DAMPER SERVO SUB-ASSEMBLY Click here

    OK

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


    1. A01IO9TE01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Damper Servo Sub-assembly)

      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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. A01ISC4E37
      Text in Illustration
      *1

      Front view of wire harness connector

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

      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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. A01IQPDE13
      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])

      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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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