Suzuki GRAND VITARA Owner's Manual page 1657

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 and pending DTC.
Troubleshooting
Step
1 Check each control unit connectors
1) Check connection of connectors of all control modules
communicating by means of CAN and reconnect
securely.
2) Recheck DTC and reconnect securely.
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 circuit
• Combination meter
• BCM
• 4WD control module (if equipped)
• ABS hydraulic unit/control module
• TCM (A/T model)
• Keyless start control module (if equipped)
• ECM
Yes
Go to Step 2.
Go to Step 3.
10B-21
No
Intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection
Inspection: in Section
00".
Repair circuit.