AIR CONDITIONING SYSTEM Generator Signal Circuit

DTC Code DTC Name
Generator Signal Circuit

DESCRIPTION

When the engine is started, the generator assembly turns on and a voltage pulse 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

E145301E39

PROCEDURE

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

    1. Disconnect the G13 amplifier connector.

    2. Disconnect the D4 generator connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G13-25 (ALT) - D4-3 (M)

      Always

      Below 1 Ω

      G13-25 (ALT) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

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    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR