AIR CONDITIONING SYSTEM IG Power Source Circuit

DESCRIPTION

The main power source is supplied to the air conditioning amplifier assembly when the engine switch is on (IG). The power source is used for operating the air conditioning amplifier assembly and servo motor, etc.

WIRING DIAGRAM

A01ERCWE04

INSPECTION PROCEDURE

Tech Tips

Start the engine before inspection. Check the relay or battery if the entry and start system does not start.

PROCEDURE


  1. INSPECT FUSE (ECU-IG NO. 2)


    1. Remove the ECU-IG NO. 2 fuse from the cowl side junction block LH.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      ECU-IG NO. 2 fuse Always Below 1 Ω

    NG

    REPLACE FUSE

    OK

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

    A01ER1YE01

    1. Disconnect the E35 amplifier connector.

    2. Disconnect the E36 amplifier connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      E36-5 (IG+) - Body ground Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E36-1 (GND) - Body ground Always Below 1 Ω
      E36-2 (E1) - Body ground
      E35-6 (E2) - Body ground

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here