01279

01279 - Longitudinal Acceleration Sensor (G251)

01279 - Longitudinal Acceleration Sensor (G251): Implausible Signal

Possible Symptoms

• Malfunction Indicator Lamp (MIL) active

Possible Causes

• Longitudinal Acceleration Sensor (G251) Calibration not performed
• Wiring/Connectors from/to Longitudinal Acceleration Sensor (G251) faulty

Possible Solutions

• Check Longitudinal Acceleration Sensor (G251)
  • Use Measuring Value Blocks (MVB) to check Sensor Signal for plausibility
  • Check Installation Position of Longitudinal Acceleration Sensor (G251)
• Perform Longitudinal Acceleration Sensor (G251) Calibration
  • See Vehicle specific Diagnostic Procedures
• Check Wiring/Connectors from/to Longitudinal Acceleration Sensor (G251)

01279 - Longitudinal Acceleration Sensor (G251): No or Incorrect Basic Setting / Adaptation

Possible Causes

• Longitudinal Acceleration Sensor (G251) Basic Setting lost/not performed

Possible Solutions

• Perform Longitudinal Acceleration Sensor (G251) Basic Setting
  • See Vehicle specific Diagnostic Procedures for Details

Special Notes

• The Longitudinal Acceleration Sensor - G251, is only installed for vehicles that have at least one of the following options:
  • 1X1: Four-wheel drive
  • UG1: Hill start assist
  • UG4: Hill hold
  • 7X5: Park assist
  • 7X6: Park Assist with rear camera
  • 8T3: Distance control (ADC)
  • 7L6: Start-Stop system