Suzuki 2006 SX4 Service Manual page 523

DTC Detecting Condition and Trouble Area
DTC detecting condition
2WD/4WD switch combination different from specification is
detected for more than 5 seconds.
DTC Confirmation Procedure
1) Clear DTC using scan tool.
2) Select 2WD/4WD switch to "2WD" position and keep its position for 10 seconds. Similarly select 2WD/4WD switch
to "AUTO" and "LOCK" position.
3) Check DTC.
Troubleshooting
Step
1 Was "4WD control system check" performed?
2 2WD/4WD switch circuit check
1) Disconnect 2WD/4WD switch connector "L174" with
ignition switch turned OFF.
2) Check for proper connection to "L174-1" and "L174-5"
terminals of 2WD/4WD switch connector.
3) If connection is OK, measure voltage between "L174-1"
terminal or "L174-5" terminal of 2WD/4WD switch
connector and vehicle body ground.
Is it 10 – 14 V?
3 2WD/4WD switch ground circuit check
1) Measure resistance between "L174-4" terminal of 2WD/
4WD switch connector and vehicle body ground with
ignition switch turned OFF.
Is resistance below 5
4 2WD/4WD switch check
1) Check 2WD/4WD switch referring to "2WD/4WD Switch
Inspection".
Is it in good condition?
5 2WD/4WD switch circuit check
1) Disconnect connector from 4WD control module
connector "G26" with ignition switch turned OFF.
2) Check for shorted to ground in related circuits.
• Between "G26-13" terminal of 4WD control module
connector and "L174-1" terminal of 2WD/4WD switch
connector.
• Between "G26-14" terminal of 4WD control module
connector and "L174-5" terminal of 2WD/4WD switch
connector.
Are they in good condition?
Action
Ω
?
Trouble area
• 2WD/4WD switch
• 2WD/4WD switch circuit
• 4WD control module
Yes
Go to Step 2.
Go to Step 3.
Go to Step 4.
Substitute a known-
good 4WD control
module and recheck.
Substitute a known-
good 4WD control
module and recheck.
Differential: 3B-26
No
Go to "4WD Control
System Check".
Go to Step 5.
"BLK/ORN" wire is
shorted to ground.
Replace 2WD/4WD
switch.
Repair circuit.