Suzuki SX4 Service Manual page 1642

10E-15 Keyless Start System:
Trunk Lid Opener Function of Keyless Start System (Sedan)
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
Trunk lid can not be
opened by trunk lid
request switch
Keyless Engine Start Function
NOTE
Before performing symptom diagnosis procedure for keyless engine start system, check that engine
starts by using ignition key. If it cannot be started by using ignition key, go to "Engine Symptom
Diagnosis in Section 1A".
Condition
Engine can not be started
by turning Ignition knob
switch
Possible cause
Circuit fuse(s) blown
Remote controller battery dead
Remote controller faulty
Request switch faulty
Trunk lid opener actuator faulty
Wiring or grounding faulty
Antennas or keyless start control
module faulty
BCM faulty
Possible cause
Circuit fuse(s) blown
Remote controller battery dead
Remote controller faulty
Steering lock unit faulty
Wiring or grounding faulty
Antennas or keyless start control
module faulty
ECM faulty
Correction / Reference Item
Replace fuse(s) and check for short circuit.
Replace battery.
Check remote controller for operation referring
to "Remote Controller Inspection".
Check request switch for operation referring to
"Front Door (Driver and Passenger Side), Rear
End Door / Trunk Lid Request Switch
Inspection".
Check trunk lid opener actuator operation
referring to "Power Door Lock Actuator
Inspection in Section 9F".
Repair circuit.
Check input and output signals of keyless start
control module referring to "Inspection of
Keyless Start Control Module and Its Circuits".
Check input and output signal of BCM referring
to "Inspection of BCM and Its Circuits in
Section 10B".
Correction / Reference Item
Replace fuse(s) and check for short circuit.
Replace battery.
Check remote controller for operation referring
to "Remote Controller Inspection".
Check steering lock unit for operation referring
to "Steering Lock Unit Inspection".
Repair circuit.
Check input and output signals of keyless start
control module referring to "Inspection of
Keyless Start Control Module and Its Circuits".
Check input and output signal of ECM referring
to "Inspection of ECM and Its Circuits in
Section 1A".