LIN COMMUNICATION SYSTEM Air Conditioning Control Panel does not Operate

DESCRIPTION

A malfunction occurs in LIN communication of the components related to the air conditioning between the air conditioning amplifier and air conditioning control.

WIRING DIAGRAM

B0059NDE03
B0058Y5E01
w/ Stop and Start System
*1 from Engine Stop and Stert ECU
*2 Air Conditioning Amplifier Assembly
*3 LIN Communication Line
*4 Air Conditioning Control Assembly

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


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

    B0059WRC09
    *a

    Front view wire harness connector

    (to Air Conditioning Control Assembly)

    1. Disconnect the air conditioning control assembly connector.

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

      Standard Resistance
      w/o Stop and Start System
      Tester Connection Condition Specified Condition
      I13-14 (GND) - Body ground Always Below 1 Ω
      w/ Stop and Start System
      Tester Connection Condition Specified Condition
      I13-14 (GND) - Body ground Always Below 1 Ω

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

      Standard Voltage
      w/o Stop and Start System
      Tester Connection Switch Condition Specified Condition
      I13-8 (IG+) - Body ground Engine switch on (IG) 11 to 14 V
      w/ Stop and Start System
      Tester Connection Switch Condition Specified Condition
      I13-8 (IG+) - Body ground Engine switch on (IG) 10.5 to 16 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the I50 air conditioning control assembly connector.

    2. Disconnect the I13 air conditioning amplifier assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I50-37 (LIN1) - I13-6 (LIN1) Always Below 1 Ω
      I50-37 (LIN1) or I13-6 (LIN1) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    GO TO AIR CONDITIONING SYSTEM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR