Suzuki Swift Sport 2004 Service & Repair Manual page 1491

DTC Detecting Condition and Trouble Area
DTC detecting condition
DTC No. 51:
Input signal from driver side door request switch remains
ON, unchanged for 10 minutes or longer.
DTC No. 52:
Input signal from passenger side door request switch
remains ON, unchanged for 10 minutes or longer.
DTC No. 53:
Input signal from rear end door request switch remains
ON, unchanged for 10 minutes or longer.
DTC Confirmation Procedure
1) Clear DTC referring to "DTC Clearance".
2) Push request switch of each door.
3) Check DTC referring to "DTC Check".
Troubleshooting
Step
1 Was "Keyless Start System Check" performed?
2 Keyless start control module voltage check
1) Turn ignition switch to OFF position.
2) Disconnect connector from each door request switch.
3) Check for proper connection to all terminals of each door
request switch connector.
4) If OK, measure voltage between "PPL", "BLU/RED" or
"YEL" terminal of related door request switch connector
and vehicle body ground.
Is voltage 10 – 14 V?
3 Request switch check
1) Check related door request switch for function referring
to "Front Door (Driver and Passenger Side), Rear End
Door Request Switch Inspection".
Is each switch in good condition?
4 Wire harness check
1) Turn ignition switch to OFF position.
2) Check for open, short and high resistance in related
circuit.
• Between "PPL" wire terminal of driver side door
request switch connector and "G42-16" terminal of
keyless start control module connector
• Between "BLU/RED" wire terminal of passenger side
door request switch connector and "G42-36" terminal
of keyless start control module connector
• Between "YEL" wire terminal of rear end door request
switch connector and "G42-32" terminal of keyless
start control module connector
Is it in good condition?
Action
Trouble area
• Driver side door request switch and its circuit
• Passenger side door request switch and its circuit
• Rear end door request switch and its circuit
• Keyless start control module
Yes
Go to Step 2.
Go to Step 3.
Substitute a known-
good keyless start
control module and
recheck.
Substitute a known-
good keyless start
control module and
recheck.
Keyless Start System:
No
Go to "Keyless Start
System Check".
Go to Step 4.
Replace request switch.
Repair circuit.
10E-29