Suzuki GRAND VITARA Owner's Manual page 713

[A]: 4WD control module connector "E91" (viewed from harness side)
[B]: Combination meter connector (viewed from harness side)
1. 4WD control module
2. Combination meter
3. Differential lock indicator
Circuit Description
Transfer position indicator operates according to the signal from 4WD control module. If the transfer control system is
in good condition, transfer position indicator light up for 2 seconds when ignition switch is turned to ON position, and
then turned to OFF position. If an abnormality is detected in the system, transfer position indicator remains lighting.
Troubleshooting
Step
1 Transfer position indicator power supply check
1) Turn ignition switch to ON position.
Do other indicators come ON?
2 Check DTC
1) Connect scan tool to DLC with ignition switch OFF.
2) Turn ignition switch to ON position and check DTC.
Is there DTC(s) U1073, U1100, U1101 and/or U1121?
3 CAN communication circuit check
1) Check CAN communication circuit between combination
meter and 4WD control module referring to "DTC U1073:
Control Module Communication Buss Off: Motor-Shift
Type (Transfer with Shift Actuator)".
Is CAN communication circuit in good condition?
4 "METER" fuse check
1) Turn ignition switch to OFF position.
2) Check for fuse blown to "METER" fuse in junction block
assembly.
Is "METER" fuse in good condition?
5 Combination meter power supply check
1) Remove combination meter referring to "Combination
Meter Removal and Installation: in Section 9C".
2) Check proper connection to combination meter
connector at "G28-13" and "G28-15" terminals.
3) If OK, then turn ignition switch to ON position and
measure voltage between combination meter connector
at "G28-13" terminal and vehicle body ground.
Is it 10 – 14 V?
6 Combination meter ground circuit check
1) Turn ignition switch to OFF position.
2) Measure resistance between combination meter
connector at "G28-15" terminal and vehicle body ground.
Ω
Is resistance 1 or less?
Transfer: Motor-Shift Type (Transfer with Shift Actuator) 3C-25
Action
4. 4L indicator
5. N indicator
6. Junction block assembly
7. "METER" fuse
8. Ignition switch
Yes
Go to Step 2.
Go to applicable DTC
diag. flow.
Go to Step 4.
Go to Step 5.
Go to Step 6.
Substitute a known-
good combination meter
and recheck. If transfer
position indicator still
remains OFF, substitute
a known-good 4WD
control module and
recheck.
No
Go to Step 3.
Substitute a known-
good combination meter
and recheck. If transfer
position indicator still
remains off, substitute a
known-good 4WD
control module and
recheck.
Repair or replace.
Replace "METER" fuse
and check for short.
"PPL/RED" wire is open
circuit.
"BLK" wire is open or
high resistance circuit.