Dtc U1073 (No. 1073): Control Module Communication Bus Off - Suzuki Grand Vitara 2011 Manual

Step
6 DTC check of BCM
1) Connect connectors of disconnected control modules
communicating by means of CAN.
2) Disconnect connector of any one of control module other
than BCM.
3) Recheck BCM for DTC.
Is DTC U0155 (No.0155) detected?

DTC U1073 (No. 1073): Control Module Communication Bus Off

Wiring Diagram
Refer to "DTC U0155 (No. 0155): Lost Communication with Instrument Panel Cluster (IPC) Control Module".
DTC Detecting Condition and Trouble Area
DTC detecting condition
Transmission error that is inconsistent between transmission data
and transmission monitor (CAN bus monitor) data is detected more
than 7 times continuously.
(1 driving detection logic)
DTC Confirmation Procedure
1) Connect scan tool to DLC with ignition switch turned OFF.
2) Turn ON ignition switch and clear DTC by using scan tool.
3) Start engine and run it for 1 min. or more.
4) Check DTC.
Action
Body Electrical Control System:
Yes
Disconnect connectors
of control modules other
than the one whose
connector is
disconnected in Step 2)
one by one and check
that DTC U0155 is
detected by BCM each
time connector is
disconnected. When
DTC U0155 is not
detected by BCM while
checking in this way, go
to description under
"NO" below. If DTC
U0155 is detected by
BCM even when
connectors of all control
modules that use CAN
communication with
BCM are disconnected,
substitute a known-
good BCM and recheck.
Trouble area
• CAN communication circuit
• Combination meter
• BCM
• 4WD control module (if equipped)
• ABS or ESP® control module
• TCM (A/T model)
• Keyless start control module (if equipped)
• ECM
• Steering angle sensor (if equipped)
10B-24
No
Check power and
ground circuit of control
module disconnected in
Step 2). If circuit is OK,
substitute a known-
good control module
disconnected in Step 2)
and recheck.
S6JB0AA204013