Suzuki GRAND VITARA Owner's Manual page 721

Troubleshooting
Step
1 Was "4WD control system check" performed?
2 Transfer shift actuator motor position switch circuit
check
1) Disconnect transfer shift actuator connector "C54" with
ignition switch OFF.
2) Check for proper connection to "C54-2", "C54-3" and
"C54-5" terminals of transfer shift actuator connector.
3) If connection is OK, measure voltage between "G54-2",
"G54-3" or "G54-5" terminal of transfer switch connector
and vehicle body ground with ignition switch ON.
Is it approx. 5 V?
3 Transfer shift actuator position switch check
1) Check transfer shift actuator position switch referring to
"Transfer Assembly Inspection: Motor-Shift Type
(Transfer with Shift Actuator)".
Is actuator in good condition?
4 Wire harness check
1) Disconnect connector from 4WD control module
connector "E91" with ignition switch OFF.
2) Check for shorted to ground in related circuits.
• Between "C54-2" terminal of transfer shift actuator
connector and "E91-25" terminal of 4WD control
module connector
• Between "C54-3" terminal of transfer shift actuator
connector and "E91-26" terminal of 4WD control
module connector
• Between "C54-5" terminal of transfer shift actuator
connector and "E91-24" terminal of 4WD control
module connector
Are they in good condition?
Transfer: Motor-Shift Type (Transfer with Shift Actuator) 3C-33
Action Yes
Go to Step 2.
Go to Step 3.
Substitute a known-
good 4WD control
module and recheck.
Substitute a known-
good 4WD control
module and recheck.
No
Go to "4WD Control
System Check: Motor-
Shift Type (Transfer with
Shift Actuator)".
Go to Step 4.
Faulty actuator position
switch. Replace transfer
shift actuator.
Repair circuit.