Dtc C1240: 4Wd Control Module Power Supply Circuit Malfunction - Suzuki SX4 Service Manual

DTC C1240: 4WD Control Module Power Supply Circuit Malfunction

Wiring Diagram
[A]: 4WD control module connector "G26" (viewed from harness side)
1. 4WD control module
2. "IG COIL" fuse
DTC Detecting Condition and Trouble Area
DTC detecting condition
4WD control module power supply voltage is out of specification. 4WD control module power supply circuit
DTC Confirmation Procedure
1) Clear DTC using scan tool.
2) Turn ignition switch to ON position for 10 seconds.
3) Check DTC.
Troubleshooting
Step
1 Was "4WD control system check" performed?
2 4WD control module power circuit check
1) Disconnect 4WD control module connector with ignition
switch OFF.
2) Check for proper connection to "G26" terminal of 4WD
control module connector.
3) If connection is OK, measure voltage between "G26-11"
terminal of 4WD control module connector and vehicle
body ground with ignition switch ON.
Is it 10 – 14 V?
1
5V
G26-12
5V
G26-11
G26-10
[A]
12 11 10 9 8 7
22 20
26 25 24 23 21
Action
2
RED/BLK
3
WHT/RED YEL
BLK
6 5 4 3 2 1
19 13
18 17 16 15 14
I7RW01320005-01
3. "4WD" fuse
4. Main fuse box
Yes
Go to Step 2.
Poor "G26-11"
connection or
intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection
Inspection in Section
00". If wire and
connections are OK,
substitute a known-
good 4WD control
module and recheck.
Differential:
S7RW0A3204014
4
Trouble area
No
Go to "4WD Control
System Check".
"4WD" fuse blown,
"WHT/RED" or "YEL"
wire is circuit open or
circuit short.
3B-18