VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1232,C1243,C1245 and 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 receives signals from the yaw rate and acceleration sensor via the CAN communication system.

If there is trouble in the bus lines between the yaw rate and acceleration sensor and the CAN communication system, DTCs U0123 (yaw rate sensor communication trouble) and U0124 (acceleration sensor communication trouble) are stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1232

Acceleration Sensor Stuck Malfunction

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. 1 fuse

  • Sensor installation

  • Harness or connector

  • Yaw rate and acceleration sensor

  • CAN communication system

C1243

Acceleration Sensor Stuck Malfunction

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).

  • ECU-IG NO. 1 fuse

  • Sensor installation

  • Harness or connector

  • Yaw rate and acceleration sensor

  • CAN communication system

C1245

Acceleration Sensor Output Malfunction

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.

  • ECU-IG NO. 1 fuse

  • Sensor installation

  • Harness or connector

  • Yaw rate and acceleration sensor

  • CAN communication system

C1279

Acceleration Sensor Output Voltage Malfunction (Test Mode DTC)

Stored during test mode.

  • ECU-IG NO. 1 fuse

  • Sensor installation

  • Harness or connector

  • Yaw rate and acceleration sensor

  • CAN communication system

WIRING DIAGRAM

C185399E31

CAUTION / NOTICE / HINT

Note:

  • When replacing the yaw rate and acceleration sensor, 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 hereClick here

      Chassis > ABS/VSC/TRC > Clear DTCs

    2. Turn the engine switch off.

    3. Turn the engine switch on (IG).

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

      Click hereClick here

      Chassis > ABS/VSC/TRC > Trouble Codes

      Result

      Result

      Proceed to

      DTC U0073, U0123, C1210 and/or C1336 are not output

      A

      DTC U0073 and/or U0123 are output

      B

      DTC C1210 and/or C1336 are output

      C
    B

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

    Click here

    C

    REPAIR CIRCUIT INDICATED BY OUTPUT DTC

    Click hereClick here

    A

  2. CHECK YAW RATE AND ACCELERATION SENSOR INSTALLATION

    1. Check that the yaw rate and acceleration sensor is installed properly.

      OK

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

      Result

      Result

      OK

      NG
    NG

    INSTALL YAW RATE AND ACCELERATION SENSOR CORRECTLY

    Click here

    OK

  3. CHECK TERMINAL VOLTAGE AND RESISTANCE (IG, GND)

    1. Disconnect the G40 yaw rate and acceleration sensor connector.

    2. C208309C01

      *a

      Front view of wire harness connector

      (to Yaw Rate and Acceleration Sensor)

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      G40-4 (IG) - Body ground

      Engine switch on (IG)

      11 to 14 V

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G40-4 (IG) - 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 AND ACCELERATION SENSOR

    Click here

    B

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR