Dtc U1100: Lost Communication With Ecm (Reception Error) (Petrol Engine Model) - Suzuki Grand Vitara 2011 Manual

4E-34 ABS:

DTC U1100: Lost Communication with ECM (Reception Error) (Petrol Engine Model)

Wiring Diagram
Refer to "DTC U1073: Control Module Communication Bus Off (Petrol Engine Model)".
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 1) Check DTC for ABS (ESP®).
Is DTC U1073 detected?
3 1) Check DTC for ECM.
Is DTC P1674 detected?
4 1) Check connection of connectors of all control modules
communicating by means of CAN.
2) Check DTC for ABS (ESP®).
Is DTC U1100 detected?
5 1) Turn ignition switch to OFF position.
2) Disconnect connectors of ABS (ESP®) control module
and ECM communicating by means of CAN.
3) Check CAN communication circuit between ABS
(ESP®) control module and ECM for open, short and
high resistance.
Is CAN communication circuit in good condition?
6 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?
7 1) Connect connectors of disconnected control modules
communicating by means of CAN.
2) Disconnect each connector.
• ECM
• TCM (A/T model)
• BCM
• 4WD control module (if equipped)
• Keyless start control module (if equipped)
• Steering angle sensor (ESP® model)
3) Check DTC for ABS (ESP®).
Is DTC U1140 detected?
Action Yes
Go to Step 2.
Go to "DTC U1073:
Control Module
Communication Bus Off
(Petrol Engine Model)".
Go to "DTC P1674:
CAN Communication
(Bus Off Error): For
Petrol Engine Model in
Section 1A".
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.
S6JB0A4504020
No
Go to "ABS Check".
Go to Step 3.
Go to Step 4.
Intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection
Inspection in Section
00".
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.