HYBRID CONTROL SYSTEM Pattern Select Switch Eco Mode Circuit

DESCRIPTION

When selecting ECO mode, the combination switch assembly 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

A000Q6UE37

PROCEDURE


  1. READ VALUE USING GTS (CAN BUS CHECK)


    1. Connect the GTS 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. for LHD B
      for RHD C

    4. Turn the power switch off.


    B

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    C

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    A

  2. CHECK DTC OUTPUT (HEALTH CHECK)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: System Select / Health Check.

    4. Check DTCs.

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

    5. Turn the power switch off.


    B

    GO TO DTC CHART

    A

  3. READ VALUE USING GTS (ECO MODE)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Data List / ECO Mode.

    4. Read the value displayed on the GTS.

      Tester Display Measurement Item/Range Normal Condition
      ECO Mode

      ECO mode transition availability/

      ON or OFF

      In ECO mode:

      ON
      Result
      Result Proceed to
      The GTS display changes according to the combination switch assembly (ECO mode) operation. A
      The GTS display does not change according to the combination switch assembly (ECO mode) operation. B

    5. Turn the power switch off.


    A

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

    B

  4. READ VALUE USING GTS (ECO SWITCH)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

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

    4. Read the value displayed on the GTS.

      Tester Display Measurement Item/Range Normal Condition
      ECO Switch

      Combination switch assembly (ECO mode) condition/

      ON or OFF

      Combination switch assembly being pushed and held: ON

      Combination switch assembly not pushed: OFF
      Result
      Result Proceed to
      The GTS display changes according to the combination switch assembly (ECO mode) operation. A
      The GTS display does not change according to the combination switch assembly (ECO mode) operation. B

    5. Turn the power switch off.


    A

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    B

  5. INSPECT COMBINATION SWITCH ASSEMBLY


    1. Remove the combination switch assembly Click here.

    2. A000RDNE01
      Text in Illustration
      *a

      Component without harness connected

      (Combination Switch Assembly)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      N59-8 (ECU) - N59-4 (GND) Combination switch assembly (ECO mode) being pushed and held Below 10 Ω
      Combination switch assembly (ECO mode) not pushed 10 kΩ or higher

    3. Install the combination switch assembly.


    NG

    REPLACE COMBINATION SWITCH ASSEMBLY Click here

    OK

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


    1. Disconnect the connector from the combination switch assembly.

    2. A000SVZE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Combination Switch Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      N59-4 (GND) - Body ground Always Below 1 Ω

    3. Connect the combination switch assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the connector from the air conditioning amplifier assembly.

    2. Disconnect the connector from the combination switch assembly.

    3. A000NWOE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Air Conditioning Amplifier Assembly)
      *b

      Front view of wire harness connector

      (to Combination Switch Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      N78-29 (ECOS) - N59-8 (ECU) Always Below 1 Ω
      N78-29 (ECOS) or N59-8 (ECU) - Body ground Always 10 kΩ or higher

    4. Connect the combination switch assembly connector.

    5. Connect the air conditioning amplifier assembly connector.


    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR