AIR CONDITIONING SYSTEM(for Manual Air Conditioning System) Operation not Accepted Even If Air Conditioning Switch is Operated

DESCRIPTION

If the air conditioning system cannot be operated using the air conditioning control assembly, the following factors may be the cause.

Symptom Factor

Air conditioning system cannot be operated using air conditioning control assembly


  • (With the exception of the switch indicators, no inputs are reflected when other switches operated)

  • LIN communication malfunction between air conditioning amplifier assembly and air conditioning control assembly

  • Short to +B or ground in air conditioning amplifier assembly circuit

  • Air conditioning amplifier assembly malfunction

  • Air conditioning control assembly malfunction

  • Harness or connector

WIRING DIAGRAM

B006ZKPE06

PROCEDURE


  1. CHECK FOR DTC


    1. Check for DTCs.


      Body Electrical > Air Conditioner > Trouble Codes
      Result
      Result Proceed to
      B14B2 is not output A
      B14B2 is output B

    B

    GO TO DTC B14B2 Click here

    A

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

    B006ZF9C12
    *a

    Front view of wire harness connector

    (to Air Conditioning Amplifier Assembly)

    1. Disconnect the K54 air conditioning amplifier assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K54-4 (GND) - Body ground Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      K54-1 (B) - Body ground Always 11 to 14 V
      K54-2 (IG+) - Body ground Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR