HYBRID CONTROL SYSTEM Pattern Select Switch Eco Mode Circuit

DESCRIPTION

When selecting ECO mode, the switch operation signal is sent to the air conditioning amplifier assembly. Following this, ECO mode control is activated for the heater and air conditioning system.

WIRING DIAGRAM

A01JAT8E02

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (CAN BUS CHECK)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: System Select / CAN Bus Check.

      Result
      Result Proceed to
      All of the ECUs and sensors that are currently connected to the CAN communication system are displayed. A
      None of the ECUs and sensors that are currently connected to the CAN communication system are displayed, or some of them are not displayed. B

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

  2. CHECK DTC OUTPUT (ALL)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Check for DTCs of all system by following the prompts on the tester screen.

      Result
      Result Proceed to
      No DTCs are output A
      DTCs are output B

    B

    GO TO DTC CHART

    A

  3. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (COMBINATION METER)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Body Electrical / Combination Meter / Active Test / Indicat. ECO Mode.

    4. Perform the "Indicat. ECO Mode" Active Test.

      OK
      Tester Display Description Inspection Condition Specified Condition
      Indicat. ECO Mode ECO mode indicator light ECO mode Comes on
      Result
      Result Proceed to
      The ECO mode indicator light comes on A
      The ECO mode indicator light does not come on B

    B

    REPLACE COMBINATION METER ASSEMBLY Click here

    A

  4. READ VALUE USING INTELLIGENT TESTER (ECO SWITCH)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Body Electrical / Air Conditioning / Data List / ECO Switch.

    4. Read the value displayed on the intelligent tester.

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      ECO Switch

      ECO switch condition/

      ON or OFF

      ECO switch ON:

      ON

      ECO switch OFF:

      OFF

      		 -
      Result
      Result Proceed to
      The intelligent tester display changes according to the ECO switch operation. A
      The intelligent tester display does not changes according to the ECO switch operation. B

    B

    CHECK PATTERN SELECT SWITCH (ECO SWITCH) Click here

    A

    CHECK FOR INTERMITTENT PROBLEMS Click here

  5. CHECK PATTERN SELECT SWITCH (ECO SWITCH)


    1. A01JAJDE03
      Text in Illustration
      *1 Pattern Select Switch (ECO Switch)

      Remove the pattern select switch (ECO switch).

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L78-2 (ECU) - L78-5 (E) ECO Switch ON Below 1 Ω
      L78-2 (ECU) - L78-5 (E) ECO Switch OFF 10 kΩ or higher

    3. Install the pattern select switch.


    NG

    REPLACE PATTERN SELECT SWITCH (ECO SWITCH)

    OK

  6. CHECK HARNESS AND CONNECTOR (ECO SWITCH - BODY GROUND)


    1. A01JCG5E01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Pattern Select Switch (ECO Switch))

      Disconnect connector L78 from the pattern select switch (ECO switch).

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L78-5 (E) - Body ground Always Below 1 Ω

    3. Connect the pattern select switch connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. CHECK HARNESS AND CONNECTOR (ECO SWITCH - AIR CONDITIONING AMPLIFIER ASSEMBLY)


    1. Disconnect connector L78 from the pattern select switch.

    2. Disconnect connector L17 from the air conditioning amplifier assembly.

    3. A01JD67E01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Pattern Select Switch (ECO Switch))
      *2

      Rear view of wire harness connector

      (to Air Conditioning Amplifier Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L78-2 (ECU) - L17-15 (ECOS) Always Below 1 Ω
      L78-2 (ECU) or L17-15 (ECOS) - Body ground Always 10 kΩ or higher

    4. Connect the air conditioning amplifier assembly connector.

    5. Connect the pattern select switch connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here