A3
O.C. AT DIFFLOCK OR AXLE
CONNECTION SOLENOID
TCU detected a wrong
voltage at the output pin, that
looks like a o.c. for this
output pin
cable is defective and has
no connection to TCU
difflock solenoid has an
internal defect
connector has no
connection to TCU
no reaction
OP-mode: normal
check the cable from
TCU to the difflock
solenoid
check the connectors
from difflock solenoid
to TCU
check the resistance
1)
of difflock solenoid
1)
see chapter 4
A4
S.C. TO GROUND AT WARNING
SIGNAL OUTPUT
TCU detected a wrong
voltage at the output pin, that
looks like a s.c. to vehicle
ground
cable is defective and is
contacted to vehicle
ground
warning device has an
internal defect
connector pin is contacted
to vehicle ground
no reaction
OP-mode: normal
check the cable from
TCU to the warning
device
check the connectors
from warning device to
TCU
check the resistance
1)
of warning device
1)
see chapter 4
A5
O.C. AT WARNING SIGNAL
OUTPUT
TCU detected a wrong
voltage at the output pin, that
looks like a o.c. for this
output pin
cable is defective and has
no connection to TCU
warning device has an
internal defect
connector has no
connection to TCU
no reaction
OP-mode: normal
check the cable from
TCU to the warning
device
check the connectors
from warning device to
TCU
check the resistance
1)
of warning device
1)
see chapter 4
A6
S.C. TO BATTERY VOLTAGE AT
WARNING SIGNAL OUTPUT
TCU detected a wrong
voltage at the output pin, that
looks like a s.c. to battery
voltage
cable is defective and is
contacted to battery
voltage
warning device has an
internal defect
connector pin is contacted
to battery voltage
no reaction
OP-mode: normal
check the cable from
TCU to the warning
device
check the connectors
from warning device to
TCU
check the resistance
1)
of warning device
1)
see chapter 4
Fault
Code
(hex)
MEANING OF THE FAULT
CODE
Possible reason for fault
detection
Reaction of the
TCU
Possible steps
to repair
Remarks
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