Suzuki Swift Sport 2004 Service & Repair Manual page 1429

DTC Troubleshooting
Step
1 DTC check of BCM
Is DTC U1100 (No. 1100) and DTC U1073 (No. 1073)
detected together?
2 DTC check of ECM
1) Check ECM for DTC.
Is DTC P1674 detected?
3 DTC check of ABS/ESP® control module
1) Check ABS/ESP® control module for DTC.
Is DTC U1073 detected?
4 Control module connector check
1) Check connection of connectors of all control modules
communicating by means of CAN.
2) Recheck BCM for DTC.
Is DTC U1100 (No. 1100) detected?
5 DTC check of ABS/ESP® control module
1) Check DTC for ABS/ESP® control module.
Is DTC U1100 detected?
6 CAN communication circuit check
1) Disconnect connectors from ECM and ABS/ESP®
control module.
2) Check CAN communication circuit between ECM and
ABS/ESP® control module for open, short and high
resistance.
Is each CAN communication circuit in good condition?
7 CAN communication circuit check
1) Disconnect connectors from BCM and ABS/ESP®
control module.
2) Check CAN communication circuit between BCM and
ABS/ESP® control module for open, short and high
resistance.
Is each CAN communication circuit in good condition?
8 CAN communication circuit check
1) Disconnect connectors of all control modules
communicating by means of CAN.
2) Check CAN communication circuit between control
modules other than Step 7 for open, short and high
resistance.
Is each CAN communication circuit in good condition?
Action
Body Electrical Control System:
Yes
Go to "DTC U1073 (No.
1073): Control Module
Communication Bus
Off".
Go to "DTC P1674:
CAN Communication
(Bus Off Error) in
Section 1A".
Go to "DTC U1073:
Control Module
Communication Bus Off
in Section 4E" or "DTC
U1073: Control Module
Communication Bus Off
in Section 4F".
Go to Step 5.
Go to Step 6.
Check ECM power and
ground circuit. If circuit
is OK, substitute a
known-good ECM and
recheck.
Go to Step 8.
Go to Step 9.
10B-26
No
Go to Step 2.
Go to Step 3.
Go to Step 4.
Intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection
Inspection in Section
00".
Go to Step 7.
Repair circuit.
Repair circuit.
Repair circuit.