Suzuki SX4 Service Manual page 185

DTC Detecting Condition and Trouble Area
DTC detecting condition
Vehicle speed signal is not input while fuel is cut at deceleration
for 4 seconds at 3600 rpm or less.
(2 driving cycle detection logic)
DTC Confirmation Procedure
WARNING
!
• When performing a road test, select a place where there is no traffic or possibility of a traffic
accident and be very careful during testing to avoid occurrence of an accident.
• Road test should be carried out by 2 persons, a driver and a tester.
1) With ignition switch turned OFF, connect scan tool.
2) Turn ON ignition switch and clear DTC using scan tool.
3) Warm up engine to normal operating temperature.
4) Drive vehicle at 4000 rpm (engine speed) with 3rd gear or "3" range.
5) Release accelerator pedal and with engine brake applied, keep vehicle coasting for 6 sec. or more (fuel cut
condition for 5 sec. or more) and stop vehicle.
6) Check pending DTC and DTC.
DTC Troubleshooting
NOTE
Before this troubleshooting is performed, read the precautions for DTC troubleshooting referring to
"Precautions for DTC Troubleshooting".
Step
1 Was "Engine and Emission Control System Check"
performed?
2 Vehicle speed signal check
Is vehicle speed displayed on scan tool in Step 4) and 5) of
"DTC Confirmation Procedure"?
3 DTC check in ABS control module assembly
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Check ABS / ESP® control module assembly for DTC.
Is there any DTC(s) in ABS / ESP
assembly?
Action
®
control module
Engine General Information and Diagnosis:
Trouble area
• Wheel speed sensor (VSS) (for M/T model)
• Wheel speed sensor circuit (for M/T model)
• ABS / ESP® control module assembly (for M/T
model)
• Output shaft speed sensor (for A/T model)
• Output shaft speed sensor circuit (for A/T
model)
• TCM malfunction (for A/T model)
• ECM malfunction
Yes
Go to Step 2.
Intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection
Inspection in Section
00".
Go to applicable DTC
diag. flow.
1A-135
No
Go to "Engine and
Emission Control
System Check".
For M/T model, go to
Step 3.
For A/T model, go to
Step 4.
Substitute a known-
good ECM and recheck.