Suzuki GRAND VITARA 2005 Service Manual page 372

4E-30 ABS:
DTC U1100: Lost Communication with ECM (Reception Error)
Wiring Diagram
Refer to "DTC U1073: Control Module Communication Bus Off: ".
DTC Detecting Condition
Reception error of communication data for ECM is detected more than specified time continuously.
DTC Troubleshooting
Step
1 Was "ABS Check" performed?
2 Check DTC in ABS (ESP®).
Is DTC U1073 detected?
3 1) Check connection of connectors of all control modules
communicating by means of CAN.
2) Check DTC for ABS (ESP®).
Is DTC U1100 detected?
4 1) Turn ignition switch to OFF position.
2) Disconnect connectors of ABS hydraulic unit / control
module and ECM.
3) Check CAN communication circuit between ABS and
ECM for open, short and high resistance.
Is CAN communication circuit in good condition?
5 1) Disconnect connectors of all control modules
communicating by means of CAN.
2) Check CAN communication circuit between control
modules other than Step 5 for open, short and high
resistance.
Is each CAN communication circuit in good condition?
6 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 "DTC U1073:
Control Module
Communication Bus
Off: ".
Go to Step 5.
Go to Step 6.
Go to Step 7.
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.
S5JB0B4504021
No
Go to "ABS Check: ".
Go to Step 3.
Intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection
Inspection: in Section
00 in related manual".
Repair or replace the
CAN communication
line.
Repair or replace the
CAN communication
line.
Check applicable
control module power
and ground circuit. If
circuit is OK, substitute
a known-good
applicable control
module and recheck.