Fail-Safe Table - Suzuki Grand Vitara Service Manual

DTC No.
C1228 4L/N switch circuit short
Transfer actuator circuit
C1230
malfunction
Transfer shift actuator motor
C1235
position switch 2 circuit open
Transfer shift actuator motor
C1236
position switch 2 circuit short
Center differential lock switch
C1237
circuit open
Center differential lock switch
C1238
circuit short
4WD control module power
C1240
supply circuit malfunction
Internal circuit malfunction of
C1243
4WD control module
Clutch pedal position (CPP)
C1246
switch circuit short
Control module communication
U1073
bus off
U1100 Lost communication with ECM
U1101 Lost communication with TCM
Lost communication with ABS
U1121
control module
NOTE
"O" in transfer position indicator column of the above table means indicator lights up when DTC is
detected.

Fail-Safe Table

This function is provided by the safe mechanism that assures safe drive ability even when the actuator, switch, sensor
or its circuit fails. The following table shows the fail safe function for each fail condition of sensor, actuator, switch,
4WD control module or its circuit.
DTC No.
C1223 Transfer actuator switch 1 circuit open
C1224 Transfer actuator switch 1 circuit short
C1235 Transfer actuator switch 2 circuit open
C1236 Transfer actuator switch 2 circuit short
C1230 Transfer actuator circuit malfunction
4WD control module power supply circuit
C1240
malfunction
C1246 Clutch switch circuit short
Transfer: Motor-Shift Type (Transfer with Shift Actuator) 3C-21
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Detecting item
Trouble Area
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Detecting condition
(DTC will set when detecting)
Though actuator position switch is "4L-lock"
position, the OFF signal is not input from the 4L/
N switch.
Transfer switch is changed of position, and then
actuator position switch is not changed for more
than 3 seconds.
Actuator position switch signal voltage 4.2 V or
more.
Actuator position switch signal voltage 0.6 V or
less.
Though actuator position switch is "4H" position,
the ON signal is not input from the center
differential lock switch.
Though actuator position switch is "4L-lock"
position, the OFF signal is not input from the
center differential lock switch.
Battery voltage is lower than lower limit voltage
for 4WD control module diagnosis.
EEPROM error
CPP switch signal is input when vehicle speed is
30 km/h (19 mph).
Transmitting and receiving error of 4WD control
module for specified time continuously.
Receiving error of 4WD control module from
ECM for specified time continuously.
Receiving error of 4WD control module from
TCM for specified time continuously.
Receiving error of 4WD control module from
ABS control module for specified time
continuously.
4WD control module stops outputting of control
signal to transfer actuator (When shifting, stop it
stops outputting after shifting is completed).
4WD control module stops outputting of control
signal to transfer actuator.
indicators
Fail-Safe Operation
Transfer
position
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S5JB0A3314010