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Home >> Toyota >> 2018 >> Camry LE >> Repair and Diagnosis >> Brakes >> Traction Control >> Vehicle Stability Control System (W/O Electric Parking Brake System) - Diagnostic Codes (2 Of 3) (Except Hybrid) >> VEHICLE STABILITY CONTROL SYSTEM (w/o Electric Parking Brake System) >> DTC C1234: Yaw Rate Sensor; DTC C1472: Acceleration Sensor; DTC C1474: Forward and Rearward G Sensor [06/2017 - 10/2020] >> Description

DTC C1234: Yaw Rate Sensor; DTC C1472: Acceleration Sensor; DTC C1474: Forward and Rearward G Sensor [06/2017 - 10/2020]: Description

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

HINT: 

If there is a malfunction 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, C1472 and/or C1474, inspect and repair the trouble areas indicated by U0123 first.

These DTCs may be stored if one of the following occurs:

DTC No. Detection Item DTC Detection Condition Trouble Area
C1234 Yaw Rate Sensor 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 turned on, 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 turned on, 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 turned on, but before the vehicle starts 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 (brake actuator assembly) estimation.
  • Yaw rate sensor (airbag sensor assembly) installation
  • Yaw rate sensor (airbag sensor assembly)
  • Yaw rate sensor circuit
C1472 Acceleration Sensor 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.
  • Acceleration sensor (airbag sensor assembly) installation
  • Acceleration sensor (airbag sensor assembly)
  • Acceleration sensor circuit
C1474 Forward and Rearward G Sensor Any of the following is detected:
  1. 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.
  2. The acceleration sensor value is less than -14.6 m/s2 or more than 14.6 m/s2 for 3 seconds or more.
  • Acceleration sensor (airbag sensor assembly) installation
  • Acceleration sensor (airbag sensor assembly)
  • Acceleration sensor circuit
DTC DETECTION CONDITIONS: C1234

  Vehicle Condition
Pattern 1 Pattern 2 Pattern 3 Pattern 4 Pattern 5
Diagnosis Condition The offset correction did not complete with the vehicle stopped. - ◦ - - -
The offset correction completed with the vehicle stopped. - - ◦ - -
The vehicle is being driven. - - - ◦ -
The VSC system has turned on, but the vehicle has not started off. - - - - ◦
Malfunction Status 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. ◦ - - - -
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. - ◦ - - -
The yaw rate sensor offset value is less than -7.5 deg/s or more than 7.5 deg/s. - - ◦ - -
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. - - - ◦ -
The yaw rate sensor value is less than -30 deg/s or more than 30 deg/s. - - - - ◦
Detection Time - - - - 5 seconds or more when the vehicle is stopped.
Number of Trips 1 trip 1 trip 1 trip 1 trip 1 trip

HINT: 

DTC will be output when conditions for either of the patterns in the table above are met.

DTC DETECTION CONDITIONS: C1234

  Vehicle Condition
Pattern 6 Pattern 7 Pattern 8 Pattern 9 Pattern 10
Diagnosis Condition The VSC system has turned on, but the vehicle has not started off. ◦ ◦ - - -
Malfunction Status The yaw rate sensor value is less than -30 deg/s or more than 30 deg/s. ◦ - - - -
As the vehicle starts off, the yaw rate sensor value is less than -30 deg/s or more than 30 deg/s. - ◦ - - -
The yaw rate sensor value is less than -94.75 deg/s or more than 94.75 deg/s. - - ◦ - -
The change of the yaw rate sensor value within 0.04 seconds is abnormal. - - - ◦ -
The value from the yaw rate sensor is judged as abnormal based on the skid control ECU (brake actuator assembly) estimation. - - - - ◦
Detection Time 0.5 seconds or more when the vehicle starts off. 0.5 seconds or more 0.8 seconds or more - -
Number of Trips 1 trip 1 trip 1 trip 1 trip 1 trip

HINT: 

DTC will be output when conditions for either of the patterns in the table above are met.

DTC DETECTION CONDITIONS: C1472

  Vehicle Condition
Pattern 1 Pattern 2 Pattern 3
Diagnosis Condition The vehicle stopped. ◦ - -
Vehicle is being driven. - ◦ -
Malfunction Status The internal acceleration value is less than -7 m/s2 or more than 7 m/s2 . ◦ - -
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. - ◦ -
The acceleration sensor value is less than -14.6 m/s2 or more than 14.6 m/s2 . - - ◦
Detection Time 0.4 seconds or more - 0.8 seconds or more
Number of Trips 1 trip 1 trip 1 trip

HINT: 

DTC will be output when conditions for either of the patterns in the table above are met.

DTC DETECTION CONDITIONS: C1474

  Vehicle Condition
Pattern 1 Pattern 2
Diagnosis Condition The vehicle is being driven. ◦ -
Malfunction Status 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. ◦ -
The acceleration sensor value is less than -14.6 m/s2 or more than 14.6 m/s2 . - ◦
Detection Time - 3 seconds or more
Number of Trips 1 trip 1 trip

HINT: 

DTC will be output when conditions for either of the patterns in the table above are met.

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