AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System) Back-up Power Source Circuit

DESCRIPTION

This is the back-up power source circuit for the air conditioning amplifier. Power is supplied even when the ignition switch is turned off, and is used for functions such as the diagnostic trouble code memory.

WIRING DIAGRAM

A011BTSE03

INSPECTION PROCEDURE

Note

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

PROCEDURE


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


    1. A0117MXE22
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to Air Conditioning Amplifier)

      Disconnect the D15 air conditioning amplifier connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      D15-21 (B) - Body ground Always 11 to 14 V

    3. Reconnect the air conditioning amplifier connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. A0117MXE23
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to Air Conditioning Amplifier)

      Disconnect the D15 air conditioning amplifier connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D15-14 (GND) - Body ground Always Below 1 Ω

    3. Reconnect the air conditioning amplifier connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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