AIR CONDITIONING SYSTEM IG Power Source Circuit

DESCRIPTION

Power source voltage is supplied to the air conditioning amplifier assembly when the engine switch is turned on (IG). This power is used for operating the air conditioning amplifier assembly, servo motors, etc.

WIRING DIAGRAM

B005LIBE18
*a from Battery
*b ECU-IG1 NO. 3
*c from Certification ECU (Smart Key ECU Assembly)
*d Air Conditioning Amplifier Assembly

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


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


    1. Disconnect the J43 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
      J43-2 (IG+) - Body ground Engine switch off Below 1 V
      J43-2 (IG+) - Body ground Engine switch on (IG) 11 to 14 V
      Result
      Proceed to
      OK
      NG

    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
      J43-4 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR