AIR CONDITIONING SYSTEM ECO Switch Circuit

DESCRIPTION

When the integration control and panel assembly is turned to ECO position, the air conditioning amplifier assembly controls the air conditioning system to enhance fuel efficiency.

WIRING DIAGRAM

B0018YSE05

PROCEDURE


  1. READ VALUE USING GTS (ECO SWITCH)


    1. Use the Data List to check if the integration control and panel assembly is functioning properly Click here.

      Air Conditioner
      Tester Display Measurement Item/Range Control Range Diagnostic Note
      ECO Switch Integration control and panel assembly / OFF or ON

      ON: Integration control and panel assembly being turned and held at ECO position

      OFF: Integration control and panel assembly not turned

      		 -
      OK
      The integration control and panel assembly condition displayed on the GTS changes with the actual switch operation.

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

  2. INSPECT INTEGRATION CONTROL AND PANEL ASSEMBLY


    1. Remove the integration control and panel assembly.


    2. Inspect the integration control and panel assembly.


      Result
      Result Proceed to
      OK A
      NG (for AE80F) B
      NG (AB60F) C

    B

    REPLACE INTEGRATION CONTROL AND PANEL ASSEMBLY Click here

    C

    REPLACE INTEGRATION CONTROL AND PANEL ASSEMBLY Click here

    A

  3. CHECK HARNESS AND CONNECTOR (INTEGRATION CONTROL AND PANEL ASSEMBLY - AIR CONDITIONING AMPLIFIER ASSEMBLY AND BODY GROUND)


    1. Disconnect the V12 integration control and panel assembly connector.

    2. Disconnect the E36 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
      V12-6 (ECU) - E36-29 (ECOS) Always Below 1 Ω
      V12-1 (E) - Body ground Always Below 1 Ω
      V12-6 (ECU) or E36-29 (ECOS) - Body ground Always 10 kΩ or higher

    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR