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

DESCRIPTION

The air conditioning amplifier assembly receives the headlight illumination signal and uses the signal to judge electrical load conditions. The electrical load signal is one element of PTC heater control.

WIRING DIAGRAM

A002LMWE01
*1 from Main Body ECU
*2 Air Conditioning Amplifier Assembly

CAUTION / NOTICE / HINT

Note

Check that the headlight comes on when the light control switch is turned to the headlight position before proceeding to the inspection procedure.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (HEADLIGHT SIGNAL)


    1. A002NPME02
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to Air Conditioning Amplifier Assembly)

      Disconnect the H46 amplifier connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      H46-27 (HLS) - Body ground Headlight dimmer switch off 11 to 14 V
      H46-27 (HLS) - Body ground Headlight dimmer switch on Below 1 V

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR