VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1232, C1243, C1245, C1279

DTC Code DTC Name
C1232 Acceleration Sensor Stuck Malfunction
C1243 Acceleration Sensor Stuck Malfunction
C1245 Acceleration Sensor Output Malfunction
C1279 Acceleration Sensor Output Voltage Malfunction (Test Mode DTC)

DESCRIPTION

The skid control ECU (master cylinder solenoid) receives signals from the yaw rate sensor assembly via the CAN communication system.

The yaw rate sensor assembly has a built-in acceleration sensor and detects the vehicle's condition using 2 circuits (GL1, GL2). If there is trouble in the bus lines between the yaw rate sensor assembly and the CAN communication system, DTCs U0123 (yaw rate sensor communication trouble) and U0124 (acceleration sensor communication trouble) are stored.

DTC Code DTC Detection Condition Trouble Area
C1232 At a vehicle speed of 10 km/h (6 mph) or more, the fluctuation range of the signal from one of either GL1 or GL2 is below 80 mV and the fluctuation range of the signal of the other is higher than 1.9 V for 30 seconds or more.

  • ECU-IG No. 2 fuse

  • ECU-B1 fuse

  • Sensor installation

  • Harness or connector

  • Yaw rate sensor assembly

  • CAN communication system
C1243

The following condition repeats 16 times.


  • GL1 and GL2 do not change when the vehicle decelerates from 30 km/h (19 mph) to 0 km/h (0 mph).
C1245

The following condition continues for at least 60 seconds.


  • The difference between the values calculated from the acceleration sensor value and vehicle speed exceeds 0.35 G.
C1279 Stored during test mode.

WIRING DIAGRAM

A01X57IE02

CAUTION / NOTICE / HINT

Note


  • After replacing the yaw rate sensor assembly, perform calibration Click here.

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTCs Click here.

    2. Turn the ignition switch off.

    3. Turn the ignition switch to ON.

    4. Check if DTCs U0073, U0123, C1210 and/or C1336 are output Click here.

      Result
      Result Proceed to
      DTC U0073, U0123, C1210 and/or C1336 are not output A
      DTC U0073 and/or U0123 are output (for LHD) B
      DTC U0073 and/or U0123 are output (for RHD) C
      DTC C1210 and/or C1336 are output D

    B

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    C

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    D

    REPAIR CIRCUIT INDICATED BY OUTPUT DTC Click here

    A

  2. CHECK YAW RATE SENSOR ASSEMBLY INSTALLATION


    1. Check that the yaw rate sensor assembly is installed properly Click here.

      OK
      The sensor is tightened to the specified torque. The sensor is not tilted.

    NG

    INSTALL YAW RATE SENSOR ASSEMBLY CORRECTLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (IG/+B/GND TERMINAL)


    1. Disconnect the yaw rate sensor assembly connector.

    2. A01X7WBE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Yaw Rate Sensor Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      E50-4 (IG) - Body ground Ignition switch ON 11 to 14 V
      E50-6 (+B) - Body ground Always 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E50-1 (GND) - Body ground Always Below 1 Ω
      Result
      Result Proceed to
      OK (When troubleshooting in accordance with Diagnostic Trouble Code Chart) A
      OK (When troubleshooting in accordance with Problem Symptoms Table) B
      NG C

    A

    REPLACE YAW RATE SENSOR ASSEMBLY Click here

    B

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR