AIR CONDITIONING SYSTEM(for Automatic Air Conditioning System) Generator Signal Circuit

DESCRIPTION

When the engine is started, the generator assembly turns and a pulsed voltage signal is generated.

This signal is used by the air conditioning amplifier assembly.

The signal expressing the amount of output from the generator assembly is one element of PTC heater control.

WIRING DIAGRAM

A0058U0E43
*a Generator Assembly
*b Air Conditioning Amplifier Assembly

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - GENERATOR)


    1. Disconnect the D47 amplifier connector.

      A0059IVE01

    2. Disconnect the B16 generator connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D47-25 (ALT) - B16-3 (M) Always Below 1 Ω
      D47-25 (ALT) - Body ground Always 10 kΩ or higher
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to Air Conditioning Amplifier Assembly)
      *2

      Front view of wire harness connector

      (to Generator Assembly)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK MODEL


    1. Check the engine model.

      Result
      Result Proceed to
      3ZR-FE A
      1ZR-FAE, 2ZR-FAE, 3ZR-FAE B

    B

    INSPECT GENERATOR ASSEMBLY Click here

    A

  3. INSPECT GENERATOR ASSEMBLY


    1. for 3ZR-FE:

      Inspect the generator assembly Click here.

      Result
      Result Proceed to
      OK A
      NG (for 3ZR-FE) B

    A

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

    B

    REPLACE GENERATOR ASSEMBLY Click here

  4. INSPECT GENERATOR ASSEMBLY


    1. for 1ZR-FAE:

      Inspect the generator assembly Click here.

    2. for 2ZR-FAE:

      Inspect the generator assembly Click here.

    3. for 3ZR-FAE:

      Inspect the generator assembly Click here.

      Result
      Result Proceed to
      OK A
      NG (for 1ZR-FAE) B
      NG (for 2ZR-FAE) C
      NG (for 3ZR-FAE) D

    A

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

    B

    REPLACE GENERATOR ASSEMBLY Click here

    C

    REPLACE GENERATOR ASSEMBLY Click here

    D

    REPLACE GENERATOR ASSEMBLY Click here