AIR CONDITIONING SYSTEM(for Automatic Air Conditioning System) ECO Switch Circuit

DESCRIPTION

When the ECO mode switch is turned on, the air conditioning amplifier assembly receives an ECO mode switch ON signal and controls the air conditioning to enhance fuel efficiency.

WIRING DIAGRAM

B001FCHE01
*1 ECO Mode Switch
*2 Shift Position Indicator
*3 Air Conditioning Amplifier Assembly

PROCEDURE


  1. READ VALUE USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Air Conditioner / Data List.

    5. Read the Data List according to the display on the GTS.

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      ECO Switch ECO mode switch / ON or OFF

      ON: ECO mode switch on

      OFF: ECO mode switch off

      		 -
      OK
      Combination switch assembly (ECO mode switch) condition displayed on the GTS changes with the actual switch operation.
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

  2. INSPECT ECO MODE SWITCH


    1. Remove the ECO mode switch.

      Click here

    2. Inspect the ECO mode switch.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE ECO MODE SWITCH Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (SHIFT POSITION INDICATOR - AIR CONDITIONING AMPLIFIER ASSEMBLY AND BODY GROUND)


    1. Disconnect the G24 air conditioning amplifier assembly connector.

    2. Disconnect the G303 shift position indicator connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G303-14 (ECU) - G24-18 (ECOS) Always Below 1 Ω
      G303-18 (E) - Body ground Always Below 1 Ω
      G303-14 (ECU) or G24-18 (ECOS) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK SHIFT POSITION INDICATOR


    1. Replace the shift position indicator with a known good one Click here.

    2. Check that the malfunction disappears.

      OK
      Malfunction disappears.
      Result
      Proceed to
      OK
      NG

    OK

    END (SHIFT POSITION INDICATOR WAS DEFECTIVE)

    NG

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here