Dtc C1254: 2Wd/4Wd Switch Malfunction - Suzuki SX4 Service Manual

3B-25 Differential:
Step
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 above 1 M
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 above 1 M

DTC C1254: 2WD/4WD Switch Malfunction

Wiring Diagram
[A]
[A]: 4WD control module connector "G26" (viewed from harness side)
[B]: 2WD/4WD switch connector "L174" (viewed from harness side)
1. 4WD control module
Action
Ω
?
Ω
?
1
12V
G26-13
G26-14
12 11 10 9 8 7 6
26 25 24 23 22 21 20
Substitute a known-
good 4WD control
module and recheck.
"YEL" wire is shorted to
ground circuit.
Substitute a known-
good 4WD control
module and recheck.
2
3
L174-1
RED/WHT
4
L174-5
GRY/YEL
5 4 3 2 1
19
18 17 16 15 14 13
Yes
Replace coupling
assembly.
Substitute a known-
good 4WD control
module and recheck.
"GRY" wire is shorted to
ground circuit.
L174-4 BLK/ORN
[B]
2 1
6 5 4 3
2. 2WD/4WD switch
3. "4WD" switch
4. "4WD-lock" switch
No
S7RW0A3204020
I7RW01320008-01