Downloaded from www.Manualslib.com manuals search engine CHASSIS ELECTRICAL - Theft-alarm System54-223
Trouble symptom
Cause
Check method
Remedy
There is no alarm when, as analarm test, the hood is openedDamaged or disconnected
wiring of hood switch input
If input checks
Repairthe harness or re-
from within the vehicle.circuit.
(P.54-220) indicate aplace the hood switch.
(The alarm is activated, however,malfunction, check by
I
by opening a door or the liftgate.)using check chartMalfunction of the hood p.54-225.
switch.
Malfunction of the ECU.
-Replace the ECU.
Engine would not start [EngineThere is a short-circuit of
starting is possible when the the starter relay activationCheck by using check
chart P.54-234.
Repair the harness.
starter relay is in the switched-off
circuit
(normally closed) condition, with
the clutch switch in the switch-off
and the ECU harness connector
disconnected.]
When, as a test of the alarm, aDamaged or disconnectedCheck by using check
door or the
liftgate is opened wiring of headlight power chart P.54-231, 232.
Repairthe harness or re-
without using the key, orthe hood
is opened from within the vehicle,supply circuit or headlightplace the diode Ds.
activation circuitReplace the headlight
the horn and the theft-alarm hornrelay or the headlight.sound but the headlights don’t
flash. (The headlights can, how-
ever, be switched. ON by usingMa
lfunction of the ECUReplace the ECU.
the passing switch.)The headlights flash during an
alarm test but the horn orthe theftDamaged or disconnectedCheck by using checkRepair the harness.
alarm horn does not sound.wiring of horn relay power
chart P.54-229,230,231.supply circuit or horn ac-Replace the horn.
tivation circuitReplace dedicated fuse
Damaged or disconnectedNo. (6) or the fusible linkwiring of the theft-alarmNo. (6).horn relay power supply
circuit or the theft-alarm
horn activation circuit.
Malfunction of the ECU.
Replace the ECU.The system is not deactivated
nhen, during an alarm test in
Damaged or disconnected
If input checks
which the alarm is intentionallywiring of door key cylinder
Repair the harness.activated, the door or
liftgate isand
liftgate unlock switch(P.54-220) indicate a
input circuitmalfunction, check byReplace the key cylinder
Jnlocked by using the key.
using check chartswitch or the
liftgate
switch.
:The system also cannot be dis-P.54-227,228.
armed.)
Malfunction of door keycyl-inder and liftgate unlock
switch.
Malfunction of the ECU
Replace the ECU.
ECU: Electronic Control Unit
NOTEIf 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 alarmcancelling 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 a key and is left opened when the door key cylinder switch system has a trouble
(wiring harness damage, open circuit, etc.), the ECU judges it as the
liftgate holding mode and does not producealarm even when the door is opened.
TSB Revision
Downloaded from www.Manualslib.com manuals search engine .,i”i, LlNl Q10. HORN ACTIVATION CIRCUIT
?a/ ;
dl
spored10.
Description of operation
The ECU transistor is turned ON if the vehicle door, etc. are
opened without use of the key.
This energizes the horn relay to activate the horn.
Checking the horn activation circuit (Disconnect the connector
of the ECU, then short-circuit terminal connector No.58, and
activate the horn relay.)
54-230CHASSIS ELECTRICAL - Theft-alarm System
z “2
EL? II A-as ’
I3 Ii3
c!
ig”‘“,1 u~cw ~ I A.,Op+J
x
6IZ)Y.l,.-”Step
1Check objectmatMal-
I Icondi- functionCauseRemedy
Horn relay termi-nalvoltage(4-Ground)12v ovMalfunction of
Check thethe horn relayhorn relay
(Refer to
P.54-118.)
Horn terminal volt-12v ovHarnessdam-age (LH & RH)Repair the
aged or discon-harness(1 -Ground)netted
Horn terminal volt-age (LH & RH)(1 -Ground)Nor-
1IItion
HornHornMalfunction ofReplacesoundoesn’tthe hornthe hornds (0 sound
V)(0 w
BatteryDamaged or dis-Repair thevoltageconnected wiringharness
of ground circuit
11. THEFT ALARM HORN RELAY POWER-SUPPLY
CIRCUIT
Description of operation
Power voltage is always supplied to theft alarm horn relay.
Checking the horn relay power-supply circuit (Disconnect the
theft alarm horn relay)Check object
THEFT ALARMHORNRELAYconnector terminal
voltage 1NormalMal-
condi-func-
CauseRemedy
tion
tion
12v
ovFuse (14)
dam-Replace the
aged or discon-fusenetted
Damaged or dis-Repair the har-connected har-nessness
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Downloaded from www.Manualslib.com manuals search engine CHASSIS ELECTRICAL - Theft-alarm Svstem54-233
1
2
3
cFronSW
1,
id
2
3
n
i
I1993
models>
Check object
NormalMal-
condi-function
tionHeadlight relay terminal voltage
(4-Ground)12v
OV
Headlightterminal12vOV
(3-Ground)voltageHeadlight
termi- Column switch: OV
nalvoltage Low
(1 -Ground)Column switch:12vHiHeadlight
termi- Column switch:12v
nalvoltage Low
(2-Ground)Column switch: OV
Hi
The
head-
light
isn’t
turned
on.1994
models>
Check object
NormalMal-
condi-function
tionHeadlight relay terminal voltage
(CGround)12vov
Headlightterminal
voltage12vov
(2-Ground)Headlight (HI)
terminal voltage
(1 -Ground)Headlight (LO)
terminal voltage
(2-Ground)
-r
/
Column switch:12v
LowColumn switch: OV
HiColumn switch: OV
LowThe
head-
light
isn’t
turned
on.Column switch: OV
HiCauseMalfunction of the
headlight relay
Harness damaged or
disconnectedMalfunction of the
headlight.
Harnessdamaged or discon-
nected. Malfunction of
column switch.
CauseRemedyMalfunction of the
headlight relay
Harness damaged or
disconnectedMalfunction of the
headlight.
Harnessdamaged or discon-
nected. Malfunction of
column switch.RemedyCheck the headlight
relay(Refer to
P.54-108.)
Repair the harness
Replace the headlight
orcolumnswitch.
Repair the harness.Check the headlight
relay(Refer to
P.54-108.)
Repair the harness
Replace the headlight
orcolumnswitch.
Repair the harness.
TSB Revision
Downloaded from www.Manualslib.com manuals search engine 54-234CHASSIS ELECTRICAL - Theft-alarm System
15. STARTER RELAY ACTIVATION CIRCUIT
lgnlllonKey reminderBattery
switch (STIswtch
B-23l-
Starter motor
Lo03 52“:
&Y
. ..--N. OYa.’ ‘pa3
PI/l i M/T
Theft-
alarm
starter
relay
IC-56
A1
ECUm
PANWNEUTNLl. PONlTlON WITCH:1(prom 1993 NODEL)
:2cm2 N@nEL>216Fcas
Description of operationThe ECU transistor is turned ON if the vehicle door etc. are opened without use of the key. This turns
OFF the starter relay and power ceases to be supplied to the starter magnet switch.
Checking the starter relay activation circuit (Disconnect the connector of the ECU, depress fully the clutch
pedal and activate the starter relay)
SW
1
t
2Check object
Starter relay terminal voltage
(2-Ground)
Startermotor terminal
(1 -Ground)I
Normal
condition
12v
12v
:
Malfunc-
tion
ov
ov
Cause
Malfunction of the starter
relay
Harness damaged or dis-
connected:
Remedy
Check the starter relay
Repair the harness
(Starter motor connector B-24: Separation)
3Continuity between “B-24” 0
Q-clDamaged magnet switchReplace magnet switch
connector and ground
( TSB Revision
