Suzuki Swift Sport 2004 Service & Repair Manual page 565

DTC Troubleshooting
Step
1 Was "ABS Check" performed?
2 1) Check connection of connectors of all control modules
communicating by means of CAN.
2) Recheck DTC.
Is DTC U1073 indicated?
3 1) Turn ignition switch to OFF position.
2) Disconnect connectors of all control modules
communicating by means of CAN.
3) Check CAN communication circuit between control
modules for open, short and high resistance.
Is each CAN communication circuit in good condition?
4 1) Turn ignition switch to OFF position.
2) Connect connector of disconnected control modules
communicating by means of CAN.
3) Disconnect connector from any one of control modules
other than BCM and ABS control module.
4) Recheck ABS control module for DTC.
IS DTC U1073 detected?
5 1) Substitute a know-good BCM and recheck ABS control
module for DTC.
IS DTC U1073 detected?
Action Yes
Go to Step 2.
Go to Step 3.
Go to Step 4.
Disconnected
connectors of control
modules other than the
one whose connector is
disconnected in Step 3)
one by one and check
that DTC U1073 is
detected by ABS control
module each time
connector is
disconnected.
When DTC U1073 is not
detected by ABS
module while checking
in this way, go to
description under "NO"
below. If DTC U1073 is
detected by ABS control
module, go to Step 5.
Substitute a know-good
ABS control module and
recheck.
ABS: 4E-26
No
Go to "ABS Check".
Intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection
Inspection in Section
00" in related manual.
Repair insulation of
CAN communication
line circuit referring to
"Precaution for CAN
Communication System
in Section 00" in related
manual.
Check power and
ground circuit of control
module disconnected in
Step 3) circuit is OK,
substitute a know-good
control module
disconnected in Step 3)
and recheck.
End.