THEFT-ALARM SYSTEM Troubleshooting
Problem
Probable cause
Check method
The system is not disarmed
Damaged or disconnected
If a malfunction is
when, while armed, a left and/or
wiring of key cylinder switch
as a result of
right door is opened by using the
checking the input
key.
nals, check by
(Alarm sounds in error.)
ing individual part and
the circuit check No. 7
procedures.
Malfunction of the ECU
2. ACTIVATION/DEACTIVATION RELATIONSHIP
Problem
There is no alarm when, as an
alarm test, a door is opened
without using the key.
(The arming and disarming are
normal, however, and the alarm
is activated when the trunk lid or
hood is opened.)
There is no alarm when, as an
alarm
the trunk lid is
opened
using the key.
(The alarm is activated, howev-
er, by the opening of a door.)
There is no alarm when, as an
alarm test, the hood is opened
from within the vehicle.
alarm is activated,
by the opening of a door.)
can’t be started.
however, when the starter
is in the switched-off
closed) condition, with the
ECU harness connector
is no alarm when, as an
test, all doors and the deck
are opened without using the
and the hood is opened from
vithin the vehicle.
The headlights can, however,
switched ON in the usual way
using the lighting switch.)
Probable cause
Check method
switch
the circuit check
Malfunction of the
control unit
Damaged or disconnected
wiring of trunk lid switch
If a malfunction is
as a result of
checking the input sig-
nals, check by
switch
ing individual part and
the circuit check No. 8
procedures.
Malfunction of the ECU
Damaged or disconnected
wiring of hood switch input
circuit
Malfunction of the hood
switch
If a malfunction is
as a result of
checking the input sig-
nals, check by
ing individual part and
the circuit check
procedures.
Malfunction of the ECU
There is a short-circuit of the
Check by following
a short-circuit of the
circuit check No. 14
reminder switch at the same
time.
procedures.
Damaged or disconnected
wiring of headlight relay or
horn relay drive circuit
Damaged or disconnected
wiring of diode
Check by following
dividual part and the
circuit check No. 10, 12
procedures.
178)
Remedy
Repair the harness or
replace the key cylinder.
Replace the ECU.
Remedy
Repair the harness or
replace the door switch.
Replace the electronic
control unit.
Repair the harness or
replace the trunk lid
switch.
Replace the ECU.
Repair the harness or
replace the hood switch.
Replace the ECU.
Repair the harness and
replace
reminder switch.
the harness or
the diode.
Malfunction of the ECU
Replace the ECU.
TSB Revision
