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

A005D04E01
*a from IG1 NO. 1 Relay
*b A/C
*c Air Conditioning Amplifier Assembly

CAUTION / NOTICE / HINT

Note

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

Tech Tips

Turn the power switch on (IG) before inspection. Check the IG1 NO. 1 relay or auxiliary battery if the power source does not change to on (IG).

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - POWER SOURCE)


    1. Disconnect the L17 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
      L17-1 (IG+) - Body ground Power switch off Below 1 V
      L17-1 (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
      L17-14 (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