Suzuki Swift Sport 2004 Service & Repair Manual page 201

Troubleshooting
Step
1 Was "Engine and Emission Control System Check"
performed?
2 DTC check in ECM
1) Check ECM for DTC.
Is there DTC P1674?
3 ECM and ABS/ESP® control module connector check
1) Check for proper connection at each ECM and ABS/
ESP® control module connector terminals with ignition
switch turned OFF.
2) If connections are OK, recheck ECM for DTC with
engine running.
Is there DTC P1685?
4 DTC check of ABS/ESP® control module
1) Check DTC U1073 in ABS/ESP® control module.
Is it indicated?
5 CAN communication circuit check
1) Turn ignition switch to OFF position.
2) Disconnect connectors form ECM and ABS/ESP®
control module.
3) Check CAN communication circuit between ECM and
ABS/ESP® control module for open, short or high
resistance.
Is each CAN communication circuit in good condition?
6 DTC check in ECM
1) Connect connectors to ECM and ABS/ESP® control
module with ignition switch turned.
2) Check ECM for DTC.
Does ECM communicate with control module other than
®
ABS/ESP control module (i.e. DTC P1676 and/or DTC
P1678 are not detected)?
Action
Engine General Information and Diagnosis:
Yes
Go to Step 2.
Go to "DTC P1674:
CAN Communication
(Bus Off Error)".
Go to Step 4.
Go to "DTC U1073:
Control Module
Communication Bus Off
in Section 4E" (Non-
ESP® model) or "DTC
U1073: Control Module
Communication Bus Off
in Section 4F" (ESP®
module).
Go to Step 6.
Substitute a known-
good ABS/ESP®
control module and
recheck.
1A-151
No
Go to "Engine and
Emission Control
System Check".
Go to Step 3.
Intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection
Inspection in Section
00".
Go to Step 5.
Repair circuit.
Substitute a known-
good ECM and recheck.