AIR CONDITIONING SYSTEM IG Power Source Circuit

DESCRIPTION

Power is supplied to the air conditioning amplifier assembly when the power switch is turned on (IG).

The power is used for operating the air conditioning amplifier assembly, servo motors, etc.

WIRING DIAGRAM

A000715E39
*a from Auxiliary Battery
*b from Power Management Control ECU
*c IG1 NO. 1
*d Air Conditioning Amplifier Assembly

CAUTION / NOTICE / HINT

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 ASSEMBLY - IG POWER SOURCE)


    1. Disconnect the H54 air conditioning amplifier assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      H54-1 (IG+) - Body ground Power switch off Below 1 V
      H54-1 (IG+) - Body ground Power switch on (IG) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H54-14 (GND) - Body ground Always Below 1 Ω

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR