Pinpoint Test N: Acc (Adaptive Cruise Control) Braking Concerns
WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
- Normal Operation and Fault Conditions
The ACC system can occasionally detect and respond to out-of path vehicles especially on curves, entry/exit ramps or when changing lanes.
Unexpected ACC Braking
- CHECK the CCM and front bumper cover for damage.
- RETEST the ACC system.
Late Or Lack Of ACC Braking
- CHECK the CCM and front bumper cover for damage.
- If no damage is observed, RETEST the ACC system.
- CHECK the radar attachments to the bracket for damage, loose grommets or attachments that have come free from the ball stud. This may cause the module to not point parallel to the ground.
- Incorrect alignment can cause delayed detection
- If concerns are present, REPAIR attachments and CHECK for proper radar alignment. REFER to: Cruise Control Radar Alignment .
- If no damage is observed and bracket attachments are OK, RETEST the ACC system.
ACC Does Not Slow The Vehicle Down Until Too Close To A Lead Vehicle, Does Not Detect A Lead Vehicle Or Vehicle Follows Closer Than The Set Gap Value
- CHECK the CCM and front bumper cover for damage.
- If no damage is observed, RETEST the ACC system.
- CHECK the radar attachments to the bracket for damage, loose grommets or attachments that have come free from the ball stud. This may cause the module to not point parallel to the ground.
- Incorrect alignment can cause delayed detection
- If concerns are present, REPAIR attachments and CHECK for proper radar alignment. REFER to: Cruise Control Radar Alignment .
- If no damage is observed and bracket attachments are OK, RETEST the ACC system.
Collision Warning Alerts In High Sensitivity Setting Occur On Bridges
- CHECK the radar attachments to the bracket for damage, loose grommets or attachments that have come free from the ball stud. This may cause the module to not point parallel to the ground.
- Incorrect alignment can cause delayed detection
- If concerns are present, REPAIR attachments and CHECK for proper radar alignment. REFER to: Cruise Control Radar Alignment .
- If no damage is observed and bracket attachments are OK, RETEST the ACC system.
Possible Sources
- Front bumper cover
- Blockage or obstruction
- CCM mounting bracket
- CCM alignment
- CCM
- CHECK the CCM and front bumper cover for damage.
Diagnostic steps are not provided for this symptom or DTC. REFER to: Diagnostic Methods