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

Step
3 Center differential lock switch check
1) Check center differential lock switch referring to
"Transfer Assembly Inspection: Motor-Shift Type
(Transfer with Shift Actuator)".
Is switch in good condition?
4 Wire harness check
1) Disconnect connector from 4WD control module
connector "E91" with ignition switch OFF.
2) Check for proper connection to "E91-14" terminal of
4WD control module connector.
3) If OK, measure resistance between "RED/GRN" terminal
of center differential lock switch connector and "E91-14"
terminal of 4WD control module connector.
Ω
Is it 1 M or more?

DTC C1240: 4WD Control Module Power Supply Circuit Malfunction

Wiring Diagram
[A]: 4WD control module connector "E91" (viewed from harness side)
1. 4WD control module
2. "IG COIL" fuse
3. Ignition switch
Transfer: Motor-Shift Type (Transfer with Shift Actuator) 3C-41
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Action
1
E91-12
5V
E91-11
E91-1
E91-10
[A]
11 10 9 8
12 7
26 25 24 23 22 21 20
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Yes
Substitute a known-
good 4WD control
module and recheck.
Substitute a known-
good 4WD control
module and recheck.
3
2
BLK/WHT
4
WHT BLK
5
7
BLK
BLK
3
6 5 4 2 1
19 18 17 16 15 14 13
4. "4WD" fuse
5. Shift switch (for A/T model) or CPP switch (for M/T model)
6. Main fuse box
7. Starting motor
No
Replace center
differential lock switch.
"RED/GRN" wire is
shorted to ground
circuit.
S5JB0A3314050
+BB
6
I5JB0A332019-01