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

DESCRIPTION

This is the main power source supplied to the air conditioning amplifier when the ignition switch is on (IG). This power source is used for operating components, such as the air conditioning amplifier and servo motors.

WIRING DIAGRAM

A017D96E04

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT FUSE (A/C NO. 2)


    1. Remove the A/C NO. 2 fuse from the instrument panel junction block.

    2. Measure the resistance of the fuse.

      Standard resistance
      Tester Connection Condition Specified Condition
      A/C NO. 2 fuse Always Below 1 Ω

    NG

    REPLACE FUSE

    OK

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


    1. A017BP9E95

      Disconnect the D33 amplifier connector.

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

      Standard voltage
      Tester Connection Condition Specified Condition
      D33-1 (IG+) - Body ground Ignition switch on (IG) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. A017CGHE06

      Disconnect the D33 and D34 amplifier connectors.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      D33-14 (GND) - Body ground Always Below 1 Ω
      D34-20 (GND2)* - Body ground Always Below 1 Ω

      Tech Tips

      *: w/ Rear Air Conditioning


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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