Power Door Lock System Symptom Diagnosis

NOTE:

Use of SUZUKI scan tool makes it easy to check whether a faulty condition is on the input side or output side of BCM. For checking procedure, refer to "Diagnosis Using Output Test Function of SUZUKI Scan Tool" under SCAN TOOL DATA .
Check each part in the order from the top of the following list.

POWER DOOR LOCK SYSTEM SYMPTOM DIAGNOSIS REFERENCE

Condition	Possible Cause	Action
All door can not be locked / unlocked by all of switches	Circuit fuse blown	Replace fuse and check for short circuit .
	Wiring or grounding faulty	Repair circuit .
	BCM faulty	Replace after making sure that none of above parts is faulty .
All door can not be locked / unlocked by only power door lock switch	Circuit fuse blown	Replace fuse and check for short circuit .
	Power door lock switch faulty	Check power door lock switch referring to POWER DOOR LOCK SWITCH INSPECTION .
	Wiring harness connected to power door lock switch faulty	Repair .
	Wiring or grounding faulty	Repair circuit .
	BCM faulty	Replace after making sure that none of above parts is faulty .
All door can not be locked / unlocked by only key cylinder switch	Circuit fuse blown	Replace fuse and check for short circuit .
	Key cylinder switch faulty	Check key cylinder switch referring to DOOR KEY CYLINDER SWITCH INSPECTION .
	Wiring or grounding faulty	Repair circuit .
	BCM faulty	Replace after making sure that none of above parts is faulty .
Only one door can not be locked / unlocked	Power door lock actuator faulty	Check actuator referring to POWER DOOR LOCK ACTUATOR INSPECTION .
	Wiring harness connected to applicable door lock actuator faulty	Repair .
	BCM faulty	Replace after making sure that none of above parts is faulty .