Suzuki GRAND VITARA 2005 Service Manual page 371

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) Connect connectors of disconnected control modules
communicating by means of CAN.
2) Disconnect each connector and check DTC for ABS
(ESP®) in turn.
• ECM
• BCM
• 4WD control module (if equipped)
• Immobilizer Control module (ICM) (if equipped)
• Combination meter
• Steering angle sensor (with ESP®)
Is DTC U1073 detected?
Action Yes
Go to Step 2.
Go to Step 3.
Go to Step 4.
Check ABS (ESP®)
control module power
and ground circuit. If
circuits are OK,
substitute a known-
good ABS (ESP®)
hydraulic unit / control
module assembly and
recheck.
ABS: 4E-29
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 applicable
control module power
and ground circuit. If
circuit is OK, substitute
a known-good
applicable control
module and recheck.