Dtc U1140: Lost Communication With Bcm (Reception Error) - Suzuki Grand Vitara 2011 Manual

Step
7 DTC check for ESP®
1) Connect connectors of disconnected control modules
communicating by means of CAN.
2) Disconnect each connector.
• ECM
• TCM (for A/T model)
• BCM
• 4WD control module
• Keyless start control module (if equipped)
• Steering angle sensor
3) Check DTC for ESP®.
Is DTC U1139 detected?

DTC U1140: Lost Communication with BCM (Reception Error)

Wiring Diagram
Refer to "DTC U1101: Lost Communication with TCM (Reception Error)".
DTC Detecting Condition and Trouble Area
DTC Detecting Condition
BCM message data is missing from CAN communication. • CAN communication circuit
DTC Troubleshooting
Step
1 Was "Electronic Stability Program Check" performed?
2 DTC check for ESP®
1) Check DTC for ESP®.
Is DTC U1140 and DTC U1073 detected together?
3 DTC check for BCM
1) Check DTC for BCM.
Is DTC U1073 detected?
4 Check each control module connectors
1) Check connection of connectors of all control modules
communicating by means of CAN.
2) Check DTC for ESP®.
Is DTC U1140 detected?
5 CAN communication circuit check
1) Turn ignition switch to OFF position.
2) Disconnect connectors of ESP® control module and
BCM communicating by means of CAN.
Is each CAN communication circuit between ESP
module and BCM opened, shorted or high resistance?
Action
Action
®
Electronic Stability Program:
Yes
Check ESP® control
module power and
ground circuit. If circuits
are OK, substitute a
known-good ESP®
hydraulic unit / control
module assembly and
recheck.
Trouble Area
• 4WD control module
• ESP® control module
Yes
Go to Step 2.
Go to "DTC U1073:
Control Module
Communication Bus Off
(Petrol Engine Model) in
Section 4E" for
troubleshooting.
Go to "DTC U1073 (No.
1073): Control Module
Communication Bus Off
in Section 10B" for
troubleshooting.
Go to Step 4.
Repair or replace the
CAN communication
line.
control
4F-43
No
Check applicable
control module power
and ground circuit. If
circuit is OK, substitute
a known-good
applicable control
module and recheck.
S6JB0A4604041
No
Go to "Electronic
Stability Program
Check".
Go to Step 3.
Go to Step 4.
Check for intermittent
trouble referring to
"Intermittent and Poor
Connection Inspection
in Section 00".
Go to Step 6.