POWER STEERING SYSTEM Drive Mode Select Switch Circuit

DESCRIPTION

The electronic throttle and the EPS character change by the operation of the drive mode select switch (combination switch assembly).

WIRING DIAGRAM

B0074YWE06

PROCEDURE


  1. CHECK THE PROBLEM SYMPTOMS


    1. Check each symptom by checking the suspected areas in the table below.

      Result
      Result Proceed to
      SPORT, SPORT S/S+ mode or NORMAL mode is abnormal. A
      ECO mode is abnormal. B

    B

    GO TO AIR CONDITIONING SYSTEM Click here

    A

  2. CHECK CAN COMMUNICATION SYSTEM


    1. Check for DTCs.

      Click here

      Result
      Result Proceed to
      CAN communication system DTCs are not output. A
      CAN communication system DTCs are output. B

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

  3. CHECK HARNESS AND CONNECTOR (DRIVE MODE SELECT SWITCH (COMBINATION SWITCH ASSEMBLY) - BODY GROUND)


    1. Turn the engine switch off.

    2. B0075J1C04
      *a

      Front view of wire harness connector

      (to Drive mode select switch (combination switch assembly))

      Disconnect the O78 drive mode select switch (combination switch assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O78-16 (E) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT DRIVE MODE SELECT SWITCH (COMBINATION SWITCH ASSEMBLY)


    1. Inspect drive mode select switch (combination switch assembly).

      for A760H: Click here

      for AA81E: Click here

      OK
      Drive mode select switch (combination switch assembly) is normal.
      Result
      Result Proceed to
      CAN communication system DTCs are not output. (for 2GR-FSE) A
      CAN communication system DTCs are not output. (for 8AR-FTS) B
      CAN communication system DTCs are output. C

    B

    CHECK HARNESS AND CONNECTOR (DRIVE MODE SELECT SWITCH (COMBINATION SWITCH ASSEMBLY) - ECM) Click here

    C

    REPLACE COMBINATION SWITCH ASSEMBLY for A760H: Click here
    REPLACE COMBINATION SWITCH ASSEMBLY for AA81E: Click here

    A

  5. CHECK HARNESS AND CONNECTOR (DRIVE MODE SELECT SWITCH (COMBINATION SWITCH ASSEMBLY) - ECM)


    1. Reconnect the O78 drive mode select switch (combination switch assembly) connector.

    2. B00747KC05
      *A w/ Adaptive Variable Suspension System
      *B w/o Adaptive Variable Suspension System
      *a

      Rear view of wire harness connector

      (to ECM)

      Disconnect the A70 and A71 ECM connectors.

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

      Standard Resistance
      w/ Adaptive Variable Suspension System
      Tester Connection Condition Specified Condition
      A70-16 (SPSW) - Body ground SPORT mode switch being turned and held Below 50 Ω
      A70-16 (SPSW) - Body ground SPORT mode switch not turned 10 kΩ or higher
      A71-25 (SPCN) - Body ground NORMAL mode switch being pushed and held Below 50 Ω
      A71-25 (SPCN) - Body ground NORMAL mode switch not pushed 10 kΩ or higher
      w/o Adaptive Variable Suspension System
      Tester Connection Condition Specified Condition
      A71-23 (PWR) - Body ground SPORT mode switch being turned and held Below 50 Ω
      A71-23 (PWR) - Body ground SPORT mode switch not turned 10 kΩ or higher
      A71-25 (SPCN) - Body ground NORMAL mode switch being pushed and held Below 50 Ω
      A71-25 (SPCN) - Body ground NORMAL mode switch not pushed 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

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


    1. Reconnect the O78 drive mode select switch (combination switch assembly) connector.

    2. B0077S6C05
      *a

      Rear view of wire harness connector

      (to ECM)

      Disconnect the A91 ECM connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A91-36 (PWMS) - Body ground SPORT mode switch being turned and held Below 50 Ω
      A91-36 (PWMS) - Body ground SPORT mode switch not turned 10 kΩ or higher
      A91-39 (SPCN) - Body ground NORMAL mode switch being pushed and held Below 50 Ω
      A91-39 (SPCN) - Body ground NORMAL mode switch not pushed 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR