DYNAMIC TORQUE CONTROL 4WD/AWD SYSTEM, Diagnostic DTC:C1296/96

DTC Code DTC Name
C1296/96 ABS Malfunction

DESCRIPTION

If a malfunction in the speed sensor signal circuit, deceleration sensor circuit*1 or acceleration sensor (airbag sensor assembly) circuit*2 occurs, the 4WD ECU assembly will output this DTC.

The airbag sensor assembly has a built-in acceleration sensor.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1296/96

ABS Malfunction

When one of the following conditions is met:

  1. Wheel speed sensor malfunction is received from the skid control ECU (brake actuator assembly)

  2. Deceleration sensor malfunction is received from skid control ECU (brake actuator assembly)*1

  3. Acceleration sensor (airbag sensor assembly) malfunction is received from skid control ECU (brake actuator assembly)*2

  • Brake control system (Speed sensor circuit)

  • Brake control system (Deceleration sensor circuit)*1

  • Skid control ECU (Brake actuator assembly)

  • Acceleration sensor (airbag sensor assembly) circuit*2

  • 4WD ECU assembly

  • *1: w/o VSC

  • *2: w/ VSC

WIRING DIAGRAM

C278266E04

CAUTION / NOTICE / HINT

Tip:

Check the condition of each related circuit connector before troubleshooting.

Click here

PROCEDURE

  1. CHECK FOR DTC (BRAKE CONTROL SYSTEM)

    1. Clear the DTC.

      w/o VSC:Click here

      w/ VSC:Click here

      Chassis > ABS/VSC/TRC > Clear DTCs

    2. Turn the ignition switch off.

    3. Turn the ignition switch to ON again.

    4. Drive the vehicle, accelerate to a speed of 20 km/h (12 mph) or more, and check if the speed sensor DTC (brake control system DTC) is output.

      w/o VSC:Click here

      w/ VSC:Click here

      Chassis > ABS/VSC/TRC > Trouble Codes

      Result

      Result

      Proceed to

      Brake control system DTC (speed sensor or deceleration sensor DTC) is not output (w/o VSC)

      A

      Brake control system DTC (speed sensor or acceleration sensor DTC) is not output (w/ VSC)

      Brake control system DTC (speed sensor or deceleration sensor DTC) is output (w/o VSC)

      B

      Brake control system DTC (speed sensor or acceleration sensor DTC) is output (w/ VSC)

      C
      Tip:

      When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding sensor.

    B

    REPAIR CIRCUIT INDICATED BY OUTPUT CODE (BRAKE CONTROL SYSTEM)

    Click here

    C

    REPAIR CIRCUIT INDICATED BY OUTPUT CODE (BRAKE CONTROL SYSTEM)

    Click hereClick here

    A

  2. READ VALUE USING GTS (WHEEL SPEED)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Chassis / Four Wheel Drive / Data List.

    5. Read the value displayed on the GTS.

      Chassis > Four Wheel Drive > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      FR Wheel Speed

      Front wheel speed sensor RH reading

      Min.: 0 km/h (0 mph)

      Max.: 326 km/h (202 mph)

      Vehicle stopped: 0 km/h (0 mph)

      No large fluctuations when driving at a constant speed.

      FL Wheel Speed

      Front wheel speed sensor LH reading

      Min.: 0 km/h (0 mph)

      Max.: 326 km/h (202 mph)

      Vehicle stopped: 0 km/h (0 mph)

      No large fluctuations when driving at a constant speed.

      RR Wheel Speed

      Rear wheel speed sensor RH reading

      Min.: 0 km/h (0 mph)

      Max.: 326 km/h (202 mph)

      Vehicle stopped: 0 km/h (0 mph)

      No large fluctuations when driving at a constant speed.

      RL Wheel Speed

      Rear wheel speed sensor LH reading

      Min.: 0 km/h (0 mph)

      Max.: 326 km/h (202 mph)

      Vehicle stopped: 0 km/h (0 mph)

      No large fluctuations when driving at a constant speed.

      Chassis > Four Wheel Drive > Data List

      Tester Display

      FR Wheel Speed

      FL Wheel Speed

      RR Wheel Speed

      RL Wheel Speed

      OK

      The speed value output from the speed sensor displayed on the GTS is the same as the actual vehicle speed measured using a speedometer tester (calibrated chassis dynamometer).

    Result

    Proceed to

    OK

    NG (w/o VSC)

    NG (w/ VSC)
    NG (w/o VSC)

    GO TO BRAKE CONTROL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

    Click here

    NG (w/ VSC)

    GO TO BRAKE CONTROL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

    Click here

    OK

  3. READ VALUE USING GTS (FORWARD AND REARWARD G)

    1. Enter the following menus: Chassis / Four Wheel Drive / Data List.

    2. Read the value displayed on the GTS.

      Chassis > Four Wheel Drive

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      Forward and Rearward G

      Forward and Rearward G

      Min.: -25.10 m/s2

      Max.: 24.90 m/s2

      Approximately 0 +/-0.13 m/s2 while stationary

      Changes in proportion with acceleration during acceleration/deceleration.

      Chassis > Four Wheel Drive > Data List

      Tester Display

      Forward and Rearward G

      OK

      w/o VSC:

      The deceleration sensor output value is normal.

      w/ VSC:

      The acceleration sensor (airbag sensor assembly) output value is normal.

    Result

    Proceed to

    OK

    NG (w/o VSC)

    NG (w/ VSC)
    OK

    REPLACE 4WD ECU ASSEMBLY

    Click here

    NG (w/o VSC)

    GO TO BRAKE CONTROL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

    Click here

    NG (w/ VSC)

    GO TO BRAKE CONTROL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

    Click here