Power Door Lock System Operation Inspection - Suzuki SX4 Service Manual

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 in Section 10B".
• Check each part in the order from the top of the following list.
Condition
All door can not be locked
/ unlocked by all of
switches
All door can not be locked
/ unlocked by only power
door lock switch
All door can not be locked
/ unlocked by only key
cylinder switch
Only one door can not be
locked / unlocked

Power Door Lock System Operation Inspection

1) Check the following operation:
a) Turn the driver side key cylinder is turned LOCK once, check all doors lock.
b) Turn the driver side door key cylinder is turned UNLOCK position once, check all doors unlock.
c) With all doors unlocked, insert key in key cylinder of driver side door and turn it to lock side, turn it again to lock
side within 3 seconds and check that no door can be opened even when door lock knob is moved to unlock
side (dead lock function, if equipped).
If malfunction is found, go to "Power Door Lock System Symptom Diagnosis".
Diagnostic Information and Procedures
Possible cause
Circuit fuse blown
Wiring or grounding faulty
BCM faulty
Circuit fuse blown
Power door lock switch faulty
Wiring harness connected to power door
lock switch faulty
Wiring or grounding faulty
BCM faulty
Circuit fuse blown
Key cylinder switch faulty
Wiring or grounding faulty
BCM faulty
Power door lock actuator faulty
Wiring harness connected to applicable
door lock actuator faulty
BCM faulty
Security and Locks:
Correction / Reference Item
Replace fuse and check for short circuit.
Repair circuit.
Replace after making sure that none of above
parts is faulty.
Replace fuse and check for short circuit.
Check power door lock switch referring to
"Power Door Lock Switch Inspection".
Repair.
Repair circuit.
Replace after making sure that none of above
parts is faulty.
Replace fuse and check for short circuit.
Check key cylinder switch referring to "Door
Key Cylinder Switch Inspection".
Repair circuit.
Replace after making sure that none of above
parts is faulty.
Check actuator referring to "Power Door Lock
Actuator Inspection".
Repair.
Replace after making sure that none of above
parts is faulty.
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