Suzuki SWIFT 2005 User Manual

4F-52 Electronic Stability Program:
DTC U1140: Lost Communication with BCM (Reception Error)
S7RS0B4604045
Wiring Diagram
Refer to “Wiring Diagram” under “DTC U1073: Control Module Communication Bus Off”.
DTC Detecting Condition and Trouble Area
3 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 U1126 detected?
Go to Step 4. Check for intermittent
trouble referring to
“Intermittent and Poor
Connection Inspection
in Section 00”.
4 CAN communication circuit check
1) Turn ignition switch to OFF position.
2) Disconnect connectors of ESP® control module, BCM
and steering angle sensor communicating by means of
CAN.
3) Check CAN communication circuit for open, short and
high resistance.
• Between ESP® control module and BCM
• Between steering angle sensor and BCM
Is each CAN communication circuit in good condition?
Repair or replace the
CAN communication
line.
Go to Step 5.
5 CAN communication circuit check
1) Disconnect connectors of all control modules
communicating by means of CAN.
2) Check CAN communication circuit between control
modules other than Step 4 for open, short and high
resistance.
Is each CAN communication circuit in good condition?
Go to Step 6. Repair or replace the
CAN communication
line.
6 DTC check for ESP®
1) Connect connectors of disconnected control modules
communicating by means of CAN.
2) Disconnect each connector.
•ECM
• Keyless start control module
• Combination meter
• Steering angle sensor
•BCM
3) Check DTC for ESP®.
Is DTC U1126 detected?
Check ESP® control
module power and
ground circuit. If circuits
are OK, substitute a
known-good ESP®
hydraulic unit / control
module assembly and
recheck.
Check applicable
control module power
and ground circuit. If
circuit is OK, substitute
a known-good
applicable control
module and recheck.
Step Action Yes No
DTC Detecting Condition Trouble Area
BCM message data is missing from CAN communication. • CAN communication circuit
•BCM
• ESP® control module

Suzuki SWIFT 2005 Specifications

General

Brand	Suzuki
Model	SWIFT 2005
Category	Automobile
Language	English