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, 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 for those DTCs. If no electronically controlled brake system DTCs are output, there may be a malfunction in the rear active stabilizer control ECU.

DTC Code 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

  • Rear active stabilizer control ECU

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 tester ON.

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

      OK
      DTC is not output.

    OK

    REPLACE REAR ACTIVE STABILIZER CONTROL ECU ASSEMBLY Click here

    NG

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