Suzuki GRAND VITARA JB416, Service Manual

Page: 255 / 474

ABS: 4E-32
DTC U1100: Lost Communication with ECM (Reception Error)
S5JB0E4504021
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 Action Yes No
1 Was “ABS Check” performed? Go to Step 2. Go to “ABS Check: ”.
2 1) Check DTC for ABS (ESP
®
).
Is DTC U1073 detected?
Go to “DTC U1073:
Control Module
Communication Bus
Off: ”. Go to Step 3.
3 1) Check DTC for ECM.
Is DTC P1674 detected?
Go to “DTC P1674:
CAN Communication
(Bus Off Error): in
Section 1A”. Go to Step 4.
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?
Go to Step 5. Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection: in Section
00 in related manual”.
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?
Go to Step 6. Repair or replace the
CAN communication
line.
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?
Go to Step 7. Repair or replace the
CAN communication
line.
7 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 (if equipped)
• Keyless start control module (if equipped)
• Steering angle sensor (with ESP
®
)
3) Check DTC for ABS (ESP
®
).
Is DTC U1140 detected?
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.
Check applicable
control module power
and ground circuit. If
circuit is OK, substitute
a known-good
applicable control
module and recheck.