Cruise Control System Symptom Diagnosis

NOTE:

ECM uses TCM, combination meter, ABS or ESP® control module and CAN communication to transmit and receive data for cruise control. Therefore, check that no DTC is detected from ECM, TCM, ABS or ESP® control module before performing this Cruise Control System Symptom Diagnosis. If DTC is detected, correct trouble indicated by that DTC first.
Check each part in the order from the top of the following list.

PARTS LIST REFERENCE

Condition	Possible Cause	Action
CRUISE or SET indicator light does not turn ON or OFF	MAIN (ON/OFF) switch faulty	Check MAIN (ON/OFF) switch for function referring to CRUISE CONTROL SWITCH INSPECTION .
	SET/COAST switch faulty	Check SET/COAST switch for function referring to CRUISE CONTROL SWITCH INSPECTION .
	Brake light switch faulty	Check brake light switch for function referring to BRAKE LIGHT SWITCH INSPECTION .
	Wiring or grounding faulty	Repair .
	Combination meter faulty	Replace .
	ECM faulty	Replace after making sure that none of above parts is faulty .
Vehicle speed can not be set	MAIN (ON/OFF) switch faulty	Check MAIN (ON/OFF) switch for function referring to CRUISE CONTROL SWITCH INSPECTION .
	SET/COAST switch faulty	Check SET/COAST switch for function referring to CRUISE CONTROL SWITCH INSPECTION .
	Brake light switch faulty	Check brake light switch for function referring to BRAKE LIGHT SWITCH INSPECTION .
	CPP switch faulty (M/T model)	Check CPP switch for function referring to CLUTCH PEDAL POSITION (CPP) SWITCH (FOR CRUISE CONTROL) INSPECTION AND ADJUSTMENT .
	Wiring or grounding faulty	Repair .
	ECM faulty	Replace after making sure that none of above parts is faulty .
Acceleration or deceleration is not available by using RES/ACC or SET/COAST switch	RES/ACC or SET/COAST switch faulty	Check RES/ACC or SET/COAST switch for function referring to CRUISE CONTROL SWITCH INSPECTION .
	Wiring or grounding faulty	Repair .
	ECM faulty	Replace after making sure that none of above parts is faulty.
Cruise control cannot be cancelled	CANCEL switch faulty	Check CANCEL switch for function referring to CRUISE CONTROL SWITCH INSPECTION .
	Brake light switch faulty	Check brake light switch for function referring to BRAKE LIGHT SWITCH INSPECTION .
	CPP switch faulty (M/T model)	Check CPP switch for function referring to CLUTCH PEDAL POSITION (CPP) SWITCH (FOR CRUISE CONTROL) INSPECTION AND ADJUSTMENT .
	Wiring or grounding faulty	Repair .
	ECM faulty	Replace after making sure that none of above parts is faulty .
Cruise control at vehicle speed stored in memory cannot be resumed after cruise control was cancelled by means other than MAIN (ON/OFF) switch	RES/ACC switch faulty	Check RES/ACC switch for function referring to CRUISE CONTROL SWITCH INSPECTION .
	Wiring or grounding faulty	Repair .
	ECM faulty	Replace after making sure that none of above parts is faulty .