AIR CONDITIONING SYSTEM(for Automatic Air Conditioning System) Rear Air Conditioning Control Panel Circuit

DESCRIPTION

This circuit consists of the No. 2 air conditioning control assembly* and the air conditioning amplifier assembly. When the No. 2 air conditioning control assembly is operated, signals are transmitted to the air conditioning amplifier assembly through the LIN communication system.

If the LIN communication system malfunctions, the air conditioning amplifier assembly does not operate even if the No. 2 air conditioning control assembly is operated.

Tech Tips

*: w/ Rear Heater

WIRING DIAGRAM

A01X53TE11

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 (NO. 2 AIR CONDITIONING CONTROL - BODY GROUND AND BATTERY)

    A01X5FDE01
    *1 Front view of wire harness connector: (to No. 2 Air Conditioning Control Assembly)

    1. Disconnect the E55 No. 2 air conditioning control assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E55-1 (E) - Body ground Always Below 1 Ω
      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      E55-6 (IG) - Body ground Engine switch on (IG) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - NO. 2 AIR CONDITIONING CONTROL)

    A01X3E8E01
    *1 Front view of wire harness connector: (to No. 2 Air Conditioning Control Assembly)
    *2 Rear view of wire harness connector: (to Air Conditioning Amplifier Assembly)

    1. Disconnect the E55 No. 2 air conditioning control assembly connector.

    2. Disconnect the E36 amplifier connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E36-21 (RLIN) - E55-4 (RLIN) Always Below 1 Ω
      E55-4 (RLIN) - Body ground Always 10 kΩ or higher
      E36-21 (RLIN) - Body ground

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK NO. 2 AIR CONDITIONING CONTROL ASSEMBLY (OPERATION)


    1. Replace the No. 2 air conditioning control assembly with a new or properly functioning one Click here.

    2. Operate the No. 2 air conditioning control assembly to check that it functions properly.

      OK
      No. 2 air conditioning control assembly function operates normally.

    OK

    REPLACE NO. 2 AIR CONDITIONING CONTROL ASSEMBLY Click here

    NG

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here