Dtc U1073 (No. 1073): Control Module Communication Bus Off - Suzuki Swift Sport 2004 Service & Repair Manual

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.
DTC Troubleshooting
Step
1 Control module connector check
1) Check connection of connectors of all control modules
communicating by means of CAN.
2) Recheck DTC.
Is DTC U1073 detected?
2 CAN communication circuit check
1) Turn ignition switch to OFF position.
2) Disconnect connectors of all control modules
communicating by means of CAN.
3) Check CAN communication circuit between control
modules for open, short and high resistance.
Is each CAN communication circuit in good condition?
Action
Body Electrical Control System:
Trouble area
• CAN communication circuit
• Combination meter
• BCM (included in junction block
assembly)
• TCM (A/T model)
• ABS/ESP® control module
• Keyless start control module (if equipped)
• ECM
• Steering angle sensor (if equipped)
Yes
Go to Step 2.
Go to Step 3.
10B-24
S7RS0BA204014
No
Intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection
Inspection in Section
00".
Repair circuit.