AIR CONDITIONING SYSTEM(for Automatic Air Conditioning System) IG Power Source Circuit

DESCRIPTION

The main power source is supplied to the air conditioning amplifier assembly when the engine switch is on (IG). The power source is used for operating the air conditioning amplifier assembly and servo motor, etc.

WIRING DIAGRAM

A01X90TE03

CAUTION / NOTICE / HINT

Tech Tips

Start the engine before inspection. Check the relay or battery if the entry and start system does not start.

PROCEDURE


  1. INSPECT FUSE (ECU-IG NO. 2)


    1. Remove the ECU-IG NO. 2 fuse from the cowl side junction block LH.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      ECU-IG NO. 2 fuse Always Below 1 Ω

    NG

    REPLACE FUSE

    OK

  2. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - BATTERY AND BODY GROUND)

    A01X7ACE01
    *1 Rear view of wire harness connector: (to Air Conditioning Amplifier Assembly)

    1. w/ Rear Heater


      1. Disconnect the E35 and E36 amplifier connectors.

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

        Standard Voltage
        Tester Connection Switch Condition Specified Condition
        E36-5 (IG+) - Body ground Engine switch off Below 1 V
        Engine switch on (IG) 11 to 14 V

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        E36-1 (GND) - Body ground Always Below 1 Ω
        E36-2 (E1) - Body ground
        E35-6 (E2) - Body ground
    2. A01X924E01
      *1 Rear view of wire harness connector: (to Air Conditioning Amplifier Assembly)

      w/o Rear Heater


      1. Disconnect the E81 amplifier connector.

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

        Standard Voltage
        Tester Connection Switch Condition Specified Condition
        E81-1 (IG+) - Body ground Engine switch off Below 1 V
        Engine switch on (IG) 11 to 14 V

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        E81-14 (GND) - Body ground Always Below 1 Ω

    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR