AIR CONDITIONING SYSTEM ECO Switch Circuit

DESCRIPTION

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

WIRING DIAGRAM

A00071HE03

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 Test.

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

      Air Conditioner
      Tester Display Measurement Item/Range Control Range Diagnostic Note
      ECO Switch

      ECO mode switch (integration control and panel assembly) /

      OFF or ON

      		 ECO mode switch (integration control and panel assembly) not turned: OFF -
      ECO mode switch (integration control and panel assembly) being turned and held at ECO position: ON
      OK
      ECO mode switch (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 ECO MODE SWITCH (INTEGRATION CONTROL AND PANEL ASSEMBLY)


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

    2. A00091RE02
      Text in Illustration
      *a

      Component without harness connected

      (ECO Mode Switch (Integration Control and Panel Assembly))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      4 (ECU) - 5 (E) ECO mode switch (integration control and panel assembly) not turned 10 kΩ or higher
      4 (ECU) - 5 (E) ECO mode switch (integration control and panel assembly) being turned and held at ECO position Below 1 Ω

    NG

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

    OK

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


    1. Disconnect the H54 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
      H54-4 (ECOS) - H71-4 (ECU) Always Below 1 Ω
      H54-4 (ECOS) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (ECO MODE SWITCH (INTEGRATION CONTROL AND PANEL ASSEMBLY) - BODY GROUND)


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H71-5 (E) - Body ground Always Below 1 Ω

    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR