ELECTRONICALLY CONTROLLED BRAKE SYSTEM, Diagnostic DTC:C1210, C1336

DTC Code DTC Name
C1210 Zero Point Calibration of Yaw Rate Sensor undone
C1336 Zero Point Calibration of Deceleration Sensor undone

DESCRIPTION

The skid control ECU receives signals from the yaw rate and acceleration sensor (airbag ECU assembly) via the CAN communication system.

The airbag ECU assembly has a built-in yaw rate and acceleration sensor and detects the vehicle's condition using 2 circuits (GL1, GL2).

If there are any problems in the bus lines between the yaw rate and acceleration sensor (airbag ECU assembly) and the CAN communication system, DTCs U0123 (Lost Communication With Yaw Rate Sensor Module) and U0124 (Lost Communication With Lateral Acceleration Sensor Module) will be output.

The DTCs will be also output when the calibration has not been completed.

DTC Code INF Code DTC Detection Condition Trouble Area
C1210 - Yaw rate sensor zero point calibration is incomplete.

  • Zero point calibration undone

  • Yaw rate sensor (Airbag ECU assembly)

  • Brake booster with master cylinder (Skid control ECU)

(Perform zero point calibration and check for DTCs. If no DTCs are output again, the sensor is normal.)
C1336 -

Either of the following is detected:


  1. The vehicle is driven normally without zero point calibration completed.

  2. After completing zero point calibration, zero point voltage of the sensor is not within the range of 2.38 to 2.62 V.

  • Zero point calibration undone

  • Acceleration sensor (Airbag ECU assembly)

  • Brake booster with master cylinder (Skid control ECU)

(Perform zero point calibration and check for DTCs. If no DTCs are output again, the sensor is normal.)

CAUTION / NOTICE / HINT

Note


  • When replacing the brake booster with master cylinder (skid control ECU), perform initialization and calibration of the linear solenoid valve Click here.

  • When replacing the yaw rate and acceleration sensor (airbag ECU assembly), perform zero point calibration Click here.

Tech Tips

When U0123 and/or U0124 is output together with C1210 and/or C1336, inspect and repair trouble areas indicated by U0123 and/or U0124 first Click here.

PROCEDURE


  1. PERFORM ZERO POINT CALIBRATION OF YAW RATE AND ACCELERATION SENSOR


    1. Perform zero point calibration of the yaw rate and acceleration sensor Click here.


    NEXT

  2. RECONFIRM DTC


    1. Turn the power switch off (lock).

    2. Clear the DTCs Click here.

    3. Turn the power switch on (ready).

    4. Drive the vehicle at a speed of 30 km/h (18 mph) or more, turn the steering wheel, and decelerate (depress the brake pedal) the vehicle.

    5. Check if the same DTC is recorded Click here.

      Result
      Result Proceed to
      DTCs (C1210 and/or C1336) are output A
      DTCs (C1210 and C1336) are not output B

      Tech Tips


      • The DTCs are recorded because zero point calibration has not been completed.

      • End the procedure because the same DTCs are not recorded after completion of zero point calibration.


    B

    END

    A

  3. CHECK AIRBAG ECU ASSEMBLY


    1. Turn the power switch off (lock).

    2. Check that the yaw rate and acceleration sensor (airbag ECU assembly) has been installed properly Click here.

      OK
      The airbag ECU assembly is tightened to the specified torque.
      The airbag ECU assembly is not tilted.

    NG

    INSTALL AIRBAG ECU ASSEMBLY Click here

    OK

  4. REPLACE AIRBAG ECU ASSEMBLY


    1. Replace the yaw rate and acceleration sensor (airbag ECU assembly) Click here.

      Note

      Check the yaw rate and acceleration sensor signal after replacement Click here.


    NEXT

  5. RECONFIRM DTC


    1. Clear the DTCs Click here.

    2. Turn the power switch on (ready).

    3. Drive the vehicle at a speed of 30 km/h (18 mph) or more, turn the steering wheel, and decelerate (depress the brake pedal) the vehicle.

    4. Check if the same DTC is recorded Click here.

      Result
      Result Proceed to
      DTCs (C1210 and/or C1336) are output (for LHD) A
      DTCs (C1210 and/or C1336) are output (for RHD) B
      DTCs (C1210 and C1336) are not output C

    A

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER Click here

    B

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER Click here

    C

    END