HYBRID CONTROL SYSTEM Pattern Select Switch Snow Mode Circuit

DESCRIPTION

When the combination switch assembly (SNOW mode) is operated, a SNOW mode signal is sent to the ECM to control the driving force to improve drivability according to operation of the accelerator pedal when road conditions are slippery, etc.

WIRING DIAGRAM

A000Q6UE55

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 (SNOW 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 / Snow Mode.

    4. Read the value displayed on the GTS.

      Tester Display Measurement Item/Range Normal Condition
      Snow Mode

      Snow mode switch signal/

      ON or OFF

      Combination switch assembly (SNOW mode) pressed:

      ON

      Combination switch assembly (SNOW mode) pressed again:

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

    5. Turn the power switch off.


    A

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

    B

  4. INSPECT COMBINATION SWITCH ASSEMBLY


    1. Remove the combination switch assembly Click here.

    2. A000T39E07
      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
      2 (2ND) - 4 (GND) Combination switch assembly (SNOW mode) being pushed and held Below 10 Ω
      Combination switch assembly (SNOW mode) not pushed 10 kΩ or higher

    3. Install the combination switch assembly.


    NG

    REPLACE COMBINATION SWITCH ASSEMBLY Click here

    OK

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


    1. Disconnect the N59 combination switch assembly connector.

    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. Reconnect the N59 combination switch assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. A000RLIE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to ECM)
      *b

      Front view of wire harness connector

      (to Combination Switch Assembly)

      Disconnect the N59 combination switch assembly connector.

    2. Disconnect the A79 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A79-43 (SNWI) - N59-2 (2ND) Always Below 1 Ω
      A79-43 (SNWI) or N59-2 (2ND) - Body ground Always 10 kΩ or higher

    4. Reconnect the N59 combination switch assembly connector.

    5. Reconnect the A79 ECM connector.


    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR