Suzuki GRAND VITARA Owner's Manual page 1726

10E-29 Keyless Start System:
DTC Detecting condition and trouble area
DTC detecting condition
Communication is not available with all control
modules connected by CAN
DTC Confirmation Procedure
1) Clear DTC referring to "DTC Clearance: ".
2) Start engine and run it for 1 min. or more.
3) Check DTC referring to "DTC Check: ".
Troubleshooting
Step
1 Was "Keyless Start System Check" performed?
2 Control module connector check
1) Check connection of connectors of all control modules
communicating by means of CAN.
2) Recheck DTC.
Is DTC No. 33 detected?
3 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?
4 DTC check
1) Check DTC for BCM.
Is DTC U1073 detected?
• CAN communication circuit
• Combination meter
• Keyless start control module
• BCM
• 4WD control module (if equipped)
• ABS hydraulic unit / control module
• TCM (A/T model)
• ECM
Action
Trouble area
Yes
Go to Step 2.
Go to Step 3.
Go to Step 4.
Go to applicable DTC
diag flow.
No
Go to "Keyless Start
System Check: ".
Intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection
Inspection: in Section
00".
Repair circuit.
Go to Step 5.