Mitsubishi MOTORS 3000GT Bedienungsanleitung Seite 719

Trouble symptom
There is no alarm when, as an
alarm test, the hood is opened
from within the vehicle.
(The alarm is activated, however,
by opening a door or the liftgate.)
Engine would not start [Engine
starting is possible when the the starter relay activation
starter relay is in the switched-off
(normally closed) condition, with
the clutch switch in the switch-off
and the ECU harness connector
disconnected.]
When, as a test of the alarm, a
door or the liftgate is opened wiring of headlight power chart P.54-231, 232.
without using the key, orthe hood
is opened from within the vehicle,
the horn and the theft-alarm horn
sound but the headlights don't
flash. (The headlights can, how-
ever, be switched. ON by using
the passing switch.)
The headlights flash during an
alarm test but the horn orthe theft
alarm horn does not sound.
The system is not deactivated
nhen, during an alarm test in
which the alarm is intentionally
activated, the door or liftgate is
armed.)
ECU: Electronic Control Unit
NOTE
If the lifigate unlock switch or door key cylinder unlock switch is operated roughly, or if these switches have
been installed incorrectly or switches themselves are defective the ECU may not accept the warning or alarm
cancelling signal. In such case, the alarm operation will take place when the door is opened using a key.
[When the door key cylinder switch has been shorted, however, if the ignition switch is turned ON, the ECU
judges the detection-switch as faulty and thereafter, it will prevent setting of (warning) alarm until the shorting
is corrected.]
If the liftgate is opened using
(wiring harness damage, open circuit, etc.), the ECU judges it as the liftgate holding mode and does not produce
alarm even when the door is opened.
CHASSIS ELECTRICAL - Theft-alarm System
Cause
Damaged or disconnected
wiring of hood switch input
circuit.
Malfunction of the hood p.54-225.
switch.
Malfunction of the ECU.
There is a short-circuit of
circuit
Damaged or disconnected
supply circuit or headlight
activation circuit
M a
l f u n c t i o n
Damaged or disconnected
wiring of horn relay power
supply circuit or horn ac-
tivation circuit
Damaged or disconnected
wiring of the theft-alarm
horn relay power supply
circuit or the theft-alarm
horn activation circuit.
Malfunction of the ECU.
Damaged or disconnected
wiring of door key cylinder
and liftgate unlock switch
input circuit
Malfunction of door keycyl-
inder and liftgate unlock
switch.
Malfunction of the ECU
a
key and is left opened when the door key cylinder switch system has a trouble
TSB Revision
Check method
Remedy
If input checks
Repairthe harness or re-
place the hood switch.
malfunction, check by
using check chart
Replace the ECU.
Check by using check Repair the harness.
chart P.54-234.
Check by using check Repairthe harness or re-
place the diode Ds.
Replace the headlight
relay or the headlight.
Replace the ECU.
Check by using check Repair the harness.
chart P.54-229,230,231. Replace the horn.
Replace dedicated fuse
No. (6) or the fusible link
No. (6).
Replace the ECU.
If input checks Repair the harness.
Replace the key cylinder
malfunction, check by
switch or the liftgate
using check chart switch.
Replace the ECU.