AIR CONDITIONING SYSTEM (for Manual Air Conditioning System) LIN Communication Circuit

DESCRIPTION

The operation signals of a switch etc. are exchanged between terminal LIN1 of the air conditioning control assembly and terminal LIN1 of the air conditioning amplifier.

WIRING DIAGRAM

A017D9LE03

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK AIR CONDITIONING SYSTEM (OPERATION)

    Result
    Result Proceed to
    Front air conditioning control malfunctions A
    Rear air conditioning control malfunctions B

    B

    CHECK HARNESS AND CONNECTOR (REAR A/C CONTROL ASSEMBLY - AIR CONDITIONING AMPLIFIER) Click here

    A

  2. CHECK HARNESS AND CONNECTOR (A/C CONTROL ASSEMBLY - AIR CONDITIONING AMPLIFIER)


    1. A017E5BE06

      Disconnect the connector from the air conditioning control assembly.

    2. Disconnect the connector from the air conditioning amplifier.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      D33-37 (LIN1) - E8-5 (LIN1) Always Below 1 Ω
      D33-37 (LIN1) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here

  3. CHECK HARNESS AND CONNECTOR (REAR A/C CONTROL ASSEMBLY - AIR CONDITIONING AMPLIFIER)


    1. A017CYPE08

      Disconnect the connector from the rear air conditioning control assembly.

    2. Disconnect the connector from the air conditioning amplifier.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      D34-13 (BLIN) - R1-5 (MPX-) Always Below 1 Ω
      D34-13 (BLIN) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here