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

DTC Code DTC Name
IG Power Source Circuit

DESCRIPTION

The main power source is supplied to the air conditioning amplifier assembly when the ignition switch is turned to ON. The power source is used for operating the air conditioning amplifier assembly, servo motors, etc.

WIRING DIAGRAM

E290764E04

CAUTION / NOTICE / HINT

Note:

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

Tip:

Start the engine before inspection. Check the relays, fuses and battery if the engine does not start.

PROCEDURE

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

    1. U124054E01

      Disconnect the H118 amplifier connector.

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      H118-1 (IG+) - Body ground

      Ignition switch off

      Below 1 V

      Ignition switch ON

      11 to 14 V

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      H118-23 (GND) - Body ground

      Always

      Below 1 Ω
      Table 1. Text in Illustration

      *1

      Front view of wire harness connector

      (to Air Conditioning Amplifier Assembly)

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    (Click here)

    REPAIR OR REPLACE HARNESS OR CONNECTOR