TORQUE VECTORING DIFFERENTIAL SYSTEM, Diagnostic DTC:C2A1A, C2A1B

DTC Code DTC Name
C2A1A RH Motor Excess Current
C2A1B LH Motor Excess Current

DESCRIPTION

When a three-phase AC current flows though the three-phase coil of the stator coil, a rotating magnetic field is generated in the TVD motor. The torque vectoring differential ECU assembly calculates the integrated current flow through the TVD motor and stores a DTC if a malfunction is detected.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate
C2A1A RH Motor Excess Current

Diagnosis Condition:


  • TVD activated

Abnormal condition:


  • Current flow through each phase is greater than 50 A

Malfunction Time:


  • 0.01 seconds or more

Trip logic:


  • 1 trip detection logic

  • Torque vectoring differential ECU assembly

  • Torque transfer module motor sub-assembly (RH side)

  • Wire harness or connector

  • Master Warning Light: Comes on

  • Multi-information Display Error Message: Comes on
C2A1B LH Motor Excess Current

Diagnosis Condition:


  • TVD activated

Abnormal condition:


  • Current flow through each phase is greater than 50 A

Malfunction Time:


  • 0.01 seconds or more

Trip logic:


  • 1 trip detection logic

  • Torque vectoring differential ECU assembly

  • Torque transfer module motor sub-assembly (LH side)

  • Wire harness or connector

  • Master Warning Light: Comes on

  • Multi-information Display Error Message: Comes on

WIRING DIAGRAM

Refer to the wiring diagram for DTC C2A0A.

Click here

CAUTION / NOTICE / HINT

Tech Tips


  • If the torque vectoring differential ECU assembly has been replaced, perform "All Learning".

    Click here

  • If the torque transfer module motor sub-assembly has been replaced or removed and installed, perform "Motor Exchange Learning".

    Click here

PROCEDURE


  1. CHECK DTC OUTPUT (TVD)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Enter the following menus: Chassis / TVD / Trouble Codes.

    4. Check for DTCs.


      Chassis > TVD > Trouble Codes
      Result
      Result Proceed to
      DTC C2A1A is output. A
      DTC C2A1B is output. B

    5. Turn the engine switch off.


    B

    CHECK TORQUE TRANSFER MODULE MOTOR SUB-ASSEMBLY (LH SIDE) Click here

    A

  2. CHECK TORQUE TRANSFER MODULE MOTOR SUB-ASSEMBLY (RH SIDE)


    1. Disconnect the V1 torque vectoring differential ECU assembly connector.

    2. Using a milliohmmeter, measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      V1-1 (MUR) - V1-2 (MVR) Always 150 to 210 mΩ
      V1-2 (MVR) - V1-3 (MWR) Always 150 to 210 mΩ
      V1-3 (MWR) - V1-1 (MUR) Always 150 to 210 mΩ

    3. Reconnect the V1 torque vectoring differential ECU assembly connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE TORQUE VECTORING DIFFERENTIAL ECU ASSEMBLY Click here

    NG

  3. CHECK HARNESS AND CONNECTOR (TORQUE VECTORING DIFFERENTIAL ECU ASSEMBLY - TORQUE TRANSFER MODULE MOTOR SUB-ASSEMBLY (RH SIDE))


    1. Disconnect the V1 torque vectoring differential ECU assembly connector.

    2. Remove the torque vectoring differential FDU (Final Drive Unit).

      Click here

    3. Disconnect the V4 torque transfer module motor sub-assembly (RH side) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      V1-1 (MUR) - V4-1 (UR) Always Below 1 Ω
      V1-2 (MVR) - V4-2 (VR) Always Below 1 Ω
      V1-3 (MWR) - V4-3 (WR) Always Below 1 Ω

    5. Reconnect the V4 torque transfer module motor sub-assembly (RH side) connector.

    6. Install the torque vectoring differential FDU (Final Drive Unit).

    7. Reconnect the V1 torque vectoring differential ECU assembly connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE TORQUE TRANSFER MODULE MOTOR SUB-ASSEMBLY (RH SIDE) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. CHECK TORQUE TRANSFER MODULE MOTOR SUB-ASSEMBLY (LH SIDE)


    1. Disconnect the V2 torque vectoring differential ECU assembly connector.

    2. Using a milliohmmeter, measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      V2-1 (MUL) - V2-2 (MVL) Always 150 to 210 mΩ
      V2-2 (MVL) - V2-3 (MWL) Always 150 to 210 mΩ
      V2-3 (MWL) - V2-1 (MUL) Always 150 to 210 mΩ

    3. Reconnect the V2 torque vectoring differential ECU assembly connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE TORQUE VECTORING DIFFERENTIAL ECU ASSEMBLY Click here

    NG

  5. CHECK HARNESS AND CONNECTOR (TORQUE VECTORING DIFFERENTIAL ECU ASSEMBLY - TORQUE TRANSFER MODULE MOTOR SUB-ASSEMBLY (LH SIDE))


    1. Disconnect the V2 torque vectoring differential ECU assembly connector.

    2. Remove the torque vectoring differential FDU (Final Drive Unit).

      Click here

    3. Disconnect the V6 torque transfer module motor sub-assembly (LH side) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      V2-1 (MUL) - V6-1 (UL) Always Below 1 Ω
      V2-2 (MVL) - V6-2 (VL) Always Below 1 Ω
      V2-3 (MWL) - V6-3 (WL) Always Below 1 Ω

    5. Reconnect the V6 torque transfer module motor sub-assembly (LH side) connector.

    6. Install the torque vectoring differential FDU (Final Drive Unit).

    7. Reconnect the V2 torque vectoring differential ECU assembly connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE TORQUE TRANSFER MODULE MOTOR SUB-ASSEMBLY (LH SIDE) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR