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Home >> Toyota >> 2014 >> Camry LE >> Repair and Diagnosis >> Brakes >> Anti-Lock Brakes >> Vehicle Stability Control System (Diagnostic Codes (C1201 - C1426) (Except Hybrid) >> Vehicle Stability Control System >> DTC C1234: Yaw Rate Sensor; DTC C1472: Acceleration Sensor [08/2013 - 12/2013] >> Description

DTC C1234: Yaw Rate Sensor; DTC C1472: Acceleration Sensor [08/2013 - 12/2013]: Description

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

HINT: 

If there is trouble in the bus lines between the yaw rate and acceleration sensor (airbag sensor assembly) and the CAN communication system, DTC U0123 (Lost Communication with Yaw Rate Sensor Module) is output. When U0123 is output together with C1234 and/or C1472, inspect and repair the trouble areas indicated by U0123 first.

DTCs may be stored if one of the following occurs:

DTC No. DTC Detection Condition Trouble Area
C1234 Any of the following is detected:
  1. The yaw rate sensor offset value is estimated as less than -5.25 deg/s or more than 5.25 deg/s based on offset correction performed when the vehicle is stopped and then the vehicle starts off.
  2. The offset correction did not complete with the vehicle stopped, and the yaw rate sensor offset value is estimated as less than -15 deg/s or more than 15 deg/s based on the offset correction performed while the vehicle is being driven.
  3. The offset correction completed with the vehicle stopped and the yaw rate sensor offset value is less than -7.5 deg/s or more than 7.5 deg/s.
  4. The yaw rate sensor offset value is estimated as less than -7.5 deg/s or more than 7.5 deg/s based on the offset correction performed while the vehicle is being driven.
  5. After the VSC system has started, but before the vehicle starts off, the yaw rate sensor value is less than -30 deg/s or more than 30 deg/s for 5 seconds or more when the vehicle is stopped.
  6. After the VSC system has started, but before the vehicle starts off, the yaw rate sensor value is less than -30 deg/s or more than 30 deg/s for 0.5 seconds or more when the vehicle starts off.
  7. After the VSC system has started, but before the vehicle has started off, as the vehicle starts off, the yaw rate sensor value is less than -30 deg/s or more than 30 deg/s for 0.5 seconds or more.
  8. The yaw rate sensor value is less than -94.75 deg/s or more than 94.75 deg/s for 0.8 seconds or more.
  9. The change of the yaw rate sensor value within 0.04 seconds is abnormal.
  10. The value from the yaw rate sensor is judged as abnormal based on the skid control ECU estimation.
  • Sensor installation
  • Yaw rate and acceleration sensor (Airbag sensor assembly)
  • Yaw rate and acceleration sensor circuit
C1472 Any of the following is detected:
  1. With the vehicle stopped, the internal acceleration value is less than -7 m/s2 or more than 7 m/s2 for 0.4 seconds or more.
  2. The acceleration sensor offset value is estimated as less than -2.25 m/s2 or more than 2.25 m/s2 based on the offset correction performed while the vehicle is being driven.
  3. The acceleration sensor value is less than -14.6 m/s2 or more than 14.6 m/s2 for 0.8 seconds or more.
  • Sensor installation
  • Yaw rate and acceleration sensor (Airbag sensor assembly)
  • Yaw rate and acceleration sensor circuit
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