Suzuki GRAND VITARA JB416 Service Manual page 154

3C-37 Transfer: Motor-Shift Type (Transfer with Shift Actuator)
Troubleshooting
Step
1 Was "4WD control system check" performed?
2 4L/N switch circuit check
1) Disconnect 4L/N switch connector with ignition switch
OFF.
2) Check for proper connection to terminal of 4L/N switch
connector.
3) If connection is OK, measure voltage between "PNK/
WHT" terminal of 4L/N switch connector and vehicle
body ground with ignition switch ON.
Is it 10 – 14 V?
3 4L/N switch check
1) Check 4L/N switch referring to "Transfer Assembly
Inspection: Motor-Shift Type (Transfer with Shift
Actuator)".
Is switch in good condition?
4 Wire harness check
1) Disconnect connector from 4WD control module
connector "E91" with ignition switch OFF.
2) Check for proper connection to "E91-13" terminal of
4WD control module connector.
3) If OK, measure resistance between "PNK/WHT" terminal
of 4L/N switch connector and "E91-13" terminal of 4WD
control module connector.
Ω
Is it 1 M or more?
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.
Replace 4L/N switch.
"PNK/WHT" wire is
shorted to ground
circuit.