Dtc C1243: Internal Circuit Malfunction Of 4Wd Control Module; Dtc C1250: Coupling Air Temperature Sensor Circuit Open - Suzuki SX4 Service Manual

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3B-19 Differential:
Step
3
Ground circuit check
1) Turn ignition switch to OFF position.
2) Check for proper connection to "G26-10" terminal of
4WD control module connector.
3) If OK, measure resistance between "G26-10" terminal of
4WD control module connector and vehicle body
ground.
If resistance 1
or less?

DTC C1243: Internal Circuit Malfunction of 4WD Control Module

DTC Detecting Condition and Trouble Area
DTC detecting condition
Internal power supply malfunction of 4WD control module
DTC Confirmation Procedure
1) Clear DTC using scan tool.
2) Start engine and run it for 10 seconds. or more.
3) Stop vehicle and check DTC.
Troubleshooting
Substitute a known-good 4WD control module and recheck.

DTC C1250: Coupling Air Temperature Sensor Circuit Open

Wiring Diagram
[A]: 4WD control module connector "G26" (viewed from harness side)
1. Coupling air temperature sensor
DTC Detecting Condition and Trouble Area
DTC detecting condition
Input signal from coupling air temperature sensor is higher than
specified value.
Action
BRN
G26-25
1
ORN
G26-24
[A]
12
11
10
9
8
7
26
25
24
23
22
21
20
Yes
Substitute a known-
good 4WD control
module and recheck.
4WD control module
2
5V
6
5
4
3
2
1
19
18
17
16
15
14
13
I7RW01320006-01
2. 4WD control module
• Coupling air temperature sensor
• Coupling air temperature sensor circuit
• 4WD control module
No
Repair ground circuit.
S7RW0A3204015
Trouble area
S7RW0A3204016
Trouble area

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