Suzuki SX4 Service Manual page 512

3B-23 Differential:
DTC Confirmation Procedure
1) Clear DTC using scan tool.
2) Start engine and select 2WD/4WD switch to "LOCK" position.
3) Keep engine running at 2000 rpm for 10 seconds. or more.
4) Stop engine and check DTC.
Troubleshooting
Step
1 Was "4WD control system check" performed?
2 Coupling assembly circuit check
1) Disconnect coupling assembly connector "L102" with
ignition switch turned OFF.
2) Check for proper connection to "L102-1" and "L102-4"
terminals of coupling assembly connector.
3) If connection is OK, measure voltage between "L102-1"
terminal of coupling assembly connector and vehicle
body ground.
Is it 10 – 14 V?
3 Coupling assembly ground circuit check
1) Measure resistance between "L102-4" terminal of
coupling assembly connector and vehicle body ground
with ignition switch turned OFF.
Is resistance below 5
4 Coupling assembly check
1) Check coupling assembly referring to "Coupling
Assembly Inspection".
Is it in good condition?
5 Coupling assembly circuit check
1) Disconnect connector from 4WD control module
connector "G26" with ignition switch turned OFF.
2) Check for proper connection to "G26-2" and "G26-3"
terminals of 4WD control module connector.
3) If connection is OK, measure resistance between "G26-
2" terminal of 4WD control module connector and
vehicle body ground.
Is resistance below 5
6 Coupling assembly circuit check
1) Disconnect connector from 4WD control module
connector "G26" with ignition switch turned OFF.
2) Check for proper connection to "G26-3" terminal of 4WD
control module connector.
3) If connection is OK, measure resistance between "G26-
3" terminal of 4WD control module connector and "L102-
1" terminal of coupling assembly connector.
Is resistance below 5
Action
Ω
?
Ω
?
Ω
?
Yes
Go to Step 2.
Go to Step 3.
Go to Step 4.
Substitute a known-
good 4WD control
module and recheck.
"YEL" wire is open or
high resistance circuit.
Substitute a known-
good 4WD control
module and recheck.
No
Go to "4WD Control
System Check".
Go to Step 6.
Go to Step 5.
Replace coupling
assembly.
Substitute a known-
good 4WD control
module and recheck.
"GRY" wire is open or
high resistance circuit.