ACTIVE STABILIZER SUSPENSION SYSTEM, Diagnostic DTC:C191B

DTC Code DTC Name
C191B Rear Vehicle Speed Signal

DESCRIPTION

If the rear active stabilizer control ECU receives a wheel speed malfunction signal from the skid control ECU, DTC C191B is output. The wheel speed signal is diagnosed by the skid control ECU. If electronically controlled brake system related DTCs are output, perform a diagnosis of the electronically controlled brake system. If no electronically controlled brake system DTCs are output, there may be a malfunction in the rear active stabilizer control ECU.

DTC No. DTC Detection Condition Trouble Area
C191B Wheel speed signals are sent from skid control ECU to rear active stabilizer control ECU, but signal reception is possible only for 1 wheel or less for 5 seconds

  • Electronically controlled brake system

  • Speed sensor

  • Rear active stabilizer control ECU
A yaw rate 0 point malfunction signal is sent from skid control ECU to rear active stabilizer control ECU

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK DTC (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)


    1. Turn the power switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the power switch on (READY) and the intelligent tester on.

    4. Check that electronically controlled brake system DTCs are not output Click here.

      OK
      DTC is not output.

    NG

    GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) Click here

    OK

    REPLACE ACTIVE STABILIZER CONTROL ECU ASSEMBLY Click here