Suzuki GRAND VITARA Owner's Manual page 1721

DTC Detecting condition and trouble area
DTC detecting condition
No communication is available between keyless start
control module and steering lock unit
DTC Confirmation Procedure
1) Clear DTC referring to "DTC Clearance: ".
2) Turn ignition knob switch pushing ignition knob switch.
3) Check DTC referring to "DTC Check: ".
Troubleshooting
Step
1 Was "Keyless Start System Check" performed?
2 Steering lock unit circuit check
1) Disconnect connector from keyless start control module.
2) Check for proper connection to "G44-20", "G44-29" and
"G44-30" terminals of keyless start control module
connector.
3) If OK, check for open, short and high resistance in each
circuit.
• Between "G22-3" terminal of steering lock unit
connector and "G44-20" terminal of keyless start
control module connector
• Between "G22-7" terminal of steering lock unit
connector and "G44-29" terminal of keyless start
control module connector
• Between "G22-8" terminal of steering lock unit
connector and vehicle body ground
Is each circuit in good condition?
3 Steering lock unit power supply voltage check
1) Connect connector to keyless start control module.
2) Measure voltage between "G22-3" terminal of steering
lock unit connector and vehicle body ground.
Is voltage 4 – 6 V?
• Steering lock unit and its circuit
• Keyless start control module
Action
Keyless Start System:
Trouble area
Yes
Go to Step 2.
Go to Step 3.
Replace steering lock
unit.
10E-24
No
Go to "Keyless Start
System Check: ".
Repair circuit.
Substitute a known-
good keyless start
control module and
recheck.