AIR CONDITIONING SYSTEM ECO Switch Circuit

DESCRIPTION

When the integration control and panel assembly (ECO mode switch) is turned on, the air conditioning amplifier assembly receives a integration control and panel assembly (ECO mode switch) ON signal and controls the air conditioning to enhance fuel efficiency.

WIRING DIAGRAM

B002JQME12
*a Integration Control and Panel Assembly (ECO Mode Switch)
*b Air Conditioning Amplifier Assembly

CAUTION / NOTICE / HINT

Note

When the auxiliary battery is disconnected or the air conditioning amplifier assembly is replaced, be sure to perform servo motor initialization.

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PROCEDURE


  1. READ VALUE USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

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

    5. Check the values by referring to the table below.


      Body Electrical > Air Conditioner > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      ECO Switch Integration control and panel assembly (ECO mode switch) ON or OFF

      ON: Integration control and panel assembly (ECO mode switch) being turned and held at ECO position

      OFF: Integration control and panel assembly (ECO mode switch) not turned

      		 -

      Body Electrical > Air Conditioner > Data List
      Tester Display
      ECO Switch
      OK
      Integration control and panel 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 INTEGRATION CONTROL AND PANEL ASSEMBLY (ECO MODE SWITCH)


    1. Remove the integration control and panel assembly (ECO mode switch).

      Click here

    2. Inspect the integration control and panel assembly (ECO mode switch).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE INTEGRATION CONTROL AND PANEL ASSEMBLY (ECO MODE SWITCH) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (INTEGRATION CONTROL AND PANEL ASSEMBLY [ECO MODE SWITCH] - AIR CONDITIONING AMPLIFIER ASSEMBLY AND BODY GROUND)


    1. Disconnect the I66 integration control and panel assembly (ECO mode switch) connector.

    2. Disconnect the I50 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
      I50-4 (ECOS) - I66-9 (ECU) Always Below 1 Ω
      I50-4 (ECOS) or I66-9 (ECU) - Body ground Always 10 kΩ or higher
      I66-1 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR