Suzuki Grand Vitara 2011 Manual page 1157

DTC Detecting Condition
Transmission error that is inconsistent between transmission data and transmission monitor (CAN bus monitor) data is
detected more than 7 times continuously.
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 (ESP® model)
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-33
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.