CRUISE CONTROL SYSTEM(for Diesel) PROBLEM SYMPTOMS TABLE

Tech Tips

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.

Cruise Control System
Symptom	Suspected Area	See page
Cruise control main switch cannot be turned on (Cruise control indicator in combination meter assembly does not illuminate)	Cruise control switch circuit	Click here
	Cruise main indicator light circuit	Click here
	Combination meter assembly	Click here
	CAN communication system	Click here
	ECM	Click here
SET does not operate or CANCEL operates when it should not (DTC is not output)	Cruise control switch circuit	Click here
	Clutch switch circuit	Click here
	Vehicle stability control system	Click here
	CAN communication system	Click here
	ECM	Click here
Actual vehicle speed deviates above or below set speed	Vehicle stability control system	Click here
Actual vehicle speed deviates above or below set speed	ECM	Click here
Cruise control is not canceled when brake pedal is depressed	Stop light switch circuit	Click here
	ECM	Click here
Cruise control is not canceled when clutch pedal is depressed	Clutch switch circuit	Click here
	CAN communication system	Click here
	ECM	Click here
Control switch does not operate (-SET, +RES, CANCEL not possible)	Cruise control switch circuit	Click here
	ECM	Click here
SET is possible at less than approximately 40 km/h (25 mph), or CANCEL does not operate	Vehicle stability control system	Click here
	ECM	Click here
Poor response in ACCEL and RESUME modes	Cruise control switch circuit	Click here
Poor response in ACCEL and RESUME modes	ECM	Click here
DTC memory is cleared	ECM	Click here
DTC is not output or is output when it should not be	TC and CG terminal circuit	Click here
DTC is not output or is output when it should not be	ECM	Click here
Cruise control indicator light does not illuminate	Cruise control switch circuit	Click here
	Cruise main indicator light circuit	Click here
	Combination meter assembly	Click here
	CAN communication system	Click here
	ECM	Click here
Cruise control SET indicator does not illuminate (SET function operates normally)	Cruise SET indicator light circuit	Click here
	Combination meter assembly	Click here
	CAN communication system	Click here
	ECM	Click here