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AIR CONDITIONING SYSTEM(for Automatic Air Conditioning System) Back-up Power Source Circuit

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DTC Code DTC Name
  Back-up Power Source Circuit
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DESCRIPTION

The back-up power source circuit for the air conditioning amplifier assembly is shown below. Power is supplied even when the ignition switch is off. The power is used for diagnostic trouble code memory, etc.

Table 1. *1 from Battery *2 ECU-B NO.3 *3 Air Conditioning Amplifier Assembly
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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

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

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PROCEDURE


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


    1. B00266RC34
      *a

      Rear view of wire harness connector

      (to Air Conditioning Amplifier Assembly)

      Disconnect the air conditioning amplifier assembly connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G33-14 (GND) - Body ground Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      G33-21 (B) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    • OK

      PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLEClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR