Adaptive Cruise Control (ACC) Symptom Troubleshooting Index(ACC) (2017)

NOTE: The ACC system is cancelled when the VSA system is activated.

Symptom	Diagnostic procedure	Also check for
ACC indicator (amber) does not come on	Do the gauge control module self-diagnostic function .
ACC OFF is displayed on the MID unexpectedly	Check the ACC system auto stop control history .
ACC indicator (amber) does not go off	Adaptive Cruise Control (ACC) Symptom Troubleshooting - ACC indicator (amber) does not go off (2014 2015) or Adaptive Cruise Control (ACC) Symptom Troubleshooting - ACC indicator (amber) does not go off (2017) .
ACC combination switch does not work (ACC system is OK)	Adaptive Cruise Control (ACC) Symptom Troubleshooting - ACC combination switch does not work (ACC system is OK) (2017) .
Vehicle speed can be set, but there is no ACC indication on the MID	Do the gauge control module self-diagnostic function .
Vehicle speed cannot be set when the SET switch is pressed (between the 25 mph (40 km/h) and 90 mph (145 km/h))	1. VEHICLE SPEED CANNOT BE SET WHEN THE SET SWITCH IS PRESSED (BETWEEN THE 25 MPH (40 KM / H) AND 90 MPH (145 KM / H)) (ACC). 2. Test the brake pedal position switch .	An open in the wire. A short in the wire. The system is in service mode.
Vehicle does not decelerate or accelerate accordingly when the SET or RES switch is pressed	VEHICLE DOES NOT DECELERATE OR ACCELERATE ACCORDINGLY WHEN THE SET OR RESUME SWITCH IS PRESSED (ACC).	An open in the wire.
Set speed does not cancel when the brake pedal is pressed	Test the brake pedal position switch .	An open in the wire.
Set speed does not cancel when the MAIN switch is turned off	SET SPEED DOES NOT CANCEL WHEN THE MAIN SWITCH IS TURNED OFF (ACC).	An open in the wire.
Set distance cannot be adjusted with the distance switch	SET DISTANCE CANNOT BE ADJUSTED WITH THE DISTANCE SWITCH (ACC).
Vehicle speed can be set, but vehicle decelerates	Check for DTCs in the PGM-FI system with the HDS - Refer to: How to Troubleshoot the Fuel and Emissions Systems (2014 2015), or How to Troubleshoot the Gear Unit Control System, or How to Troubleshoot the Fuel and Emissions Systems (2017) .
Senses a vehicle driving in another lane	Adaptive Cruise Control (ACC) Symptom Troubleshooting - Senses a vehicle driving in another lane .	Incorrect millimeter wave radar installation. Wheel alignment.
Does not sense the vehicle driving ahead	Adaptive Cruise Control (ACC) Symptom Troubleshooting - Does not sense the vehicle driving ahead .	Out of the performance limits. Wheel alignment. Undetectable environment.
Intermittently senses the vehicle driving ahead	Adaptive Cruise Control (ACC) Symptom Troubleshooting - Intermittently senses the vehicle driving ahead .	Incorrect millimeter wave radar installation. Wheel alignment. Undetectable environment.