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

DTC Code DTC Name
C1296/96 ABS Malfunction

DESCRIPTION

If a malfunction in the speed sensor signal circuit or acceleration sensor (airbag sensor assembly*1 or yaw rate sensor assembly*2) circuit is detected, the 4WD ECU assembly stores this DTC.

The airbag sensor assembly has a built-in acceleration sensor.*1

DTC No. Detection Item DTC Detection Condition Trouble Area
C1296/96 ABS Malfunction

When one of the following conditions is met:


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

  2. An acceleration sensor (airbag sensor assembly*1 or yaw rate sensor assembly*2) malfunction is received from skid control ECU (brake actuator assembly)

  • Vehicle stability control system (Speed sensor circuit)

  • Skid control ECU (Brake actuator assembly)

  • Acceleration sensor (airbag sensor assembly) circuit*1

  • Acceleration sensor (yaw rate sensor assembly) circuit*2

  • 4WD ECU assembly

WIRING DIAGRAM

Refer to DTC C1337/91.

Click here

CAUTION / NOTICE / HINT

Note

When the 4WD ECU assembly is replaced with a known good one from another vehicle, it is necessary to perform calibration.

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Tech Tips

Check the condition of each related circuit connector before troubleshooting.

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PROCEDURE


  1. CHECK FOR DTC (VEHICLE STABILITY CONTROL SYSTEM)


    1. Clear the DTCs.

      Click here


      Chassis > ABS/VSC/TRC/EPB > Clear DTCs

    2. Turn the engine switch off.

    3. Drive the vehicle, accelerate to a speed of 20 km/h (12 mph) or more, and check if any DTCs related to a speed sensor or acceleration sensor are output.

      Click here


      Chassis > ABS/VSC/TRC/EPB > Trouble Codes
      Result
      Result Proceed to
      Vehicle stability control system DTC (speed sensor or acceleration sensor DTC) is not output A
      Vehicle stability control system DTC (speed sensor or acceleration sensor DTC) is output B

    B

    REPAIR CIRCUIT INDICATED BY OUTPUT CODE (VEHICLE STABILITY CONTROL SYSTEM) Click here

    A

  2. READ VALUE USING GTS (WHEEL SPEED)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    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

    NG

    GO TO VEHICLE STABILITY 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 > Data List
      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

      		During acceleration/deceleration: Changes in accordance with acceleration -

      Chassis > Four Wheel Drive > Data List
      Tester Display
      Forward and Rearward G
      OK
      The acceleration sensor (airbag ECU assembly*1 or yaw rate sensor assembly*2) output value is normal.

      • *1: w/ Optitron Meter Type

      • *2: w/ TFT Meter Type

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE 4WD ECU ASSEMBLY Click here

    NG

    GO TO VEHICLE STABILITY CONTROL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here