1993 MITSUBISHI 3000GT relay

Downloaded from www.Manualslib.com manuals search engine 54-210CHASSIS ELECTRICAL - Theft-alarm System
CIRCUIT DIAGRAM
FUSIBLE LINK@IGNITIONI
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SIDE MARKER
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LIGHT
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1 TSB Revision

Downloaded from www.Manualslib.com manuals search engine 54-212CHASSIS ELECTRICAL - Theft-alarm System
CIRCUIT DIAGRAM (CONTINUED)
IGNITIONSWITCH(ST)
KEYLIGHT&y+;;ERAUTOMATIC
SHUT-OFF UNIT
rA/T yM/T
1B-LI
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7
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BATTERYJm
20B-R3B-RJ(B-23) ,.l(B-24)/\
%ERER
(c-65)(c-66)(c-79) FRONT SIDE
HRlBMOlBA
1 TSB Revision

Downloaded from www.Manualslib.com manuals search engine 54-218CHASSIS ELECTRICAL - Theft-alarm System
COMPONENT LOCATION16FO257
16FO26800002412
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relay -
m \ \F026119FO134
h$k RevisionI

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 iCHASSIS ELECTRICAL
- Theft-alarm System54-229
JS!SECURITYE-04@y&fiNAT! ON .$36
152
FUSIBLE LINK CE)m
z0alz!
r%BECATED
mCL
1
TO THE ECUTO THE HORN8. SECURITY LIGHT ACTIVATION CIRCUIT
Description of operation
If all doors are in locked state after key-less locking, the ECUtransistor is turned ON and the security light comes on.
Checking the security light activation circuit (Disconnect the
connector of the ECU and check at the wiring harness side.)Nor-
malMal-
stepCheck objectcondi-func-
Cause
Remedy
tiontion
1D-04connector12v ovterminal voltage 51Fuse (19) dam-Replaceaged or discon-the fusenetted
Harnessdam-Repair the
aged or discon-harnessnetted, or short-circuit
2D-04connector12v ovterminal voltage 52Damaged or dis-
Replaceconnected wiringthe bulbofSECURITYlight bulb
Harness
dam-Repair the
aged or discon-harnessnetted
3ECU terminal volt-12v ovHarnessdam-
age 57Repair the
aged or discon-harnessnetted, or short-circuit9. HORN RELAY POWER-SUPPLY CIRCUIT
Description of operationPower voltage is always supplied to the horn relay.
Checking the horn relay power-supply circuit (Disconnect the
horn relay)
connector terminal
Mal-func-CauseRemedytion
Fuse (3)
dam-Replace the
aged or discon-fusenetted
Damaged or dis-Repair the har-connected har-nessness
TSB Revision

Downloaded from www.Manualslib.com manuals search engine .,i”i, LlNl Q10. HORN ACTIVATION CIRCUIT
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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
TSB Revision

Downloaded from www.Manualslib.com manuals search engine i
LCHASSIS ELECTRICAL
- Theft-alarm System54-231
Fwbklink (6)A-26
8=’ Theft-
alarm
ECUA 27
i
1 *horn
al
Z16FO342
TO Ecu
auO-U-RS4I2-YI
12. THEFT ALARM HORN ACTIVATION ClRCUlT
Description of operation
The ECU transistor is turned ON if the vehicle door, etc. are
opened without use of the key.
This energizes the theft alarm 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 theft alarm horn relay.)
13. HEADLIGHT POWER-SUPPLY CIRCUIT
Description of operation
Power voltage is always supplied to the headlight relay.
Checking the headlight power-supply circuit (Disconnect the
headlight relay)
Check objectNormalMal-condi-func-CausetiontionRemedy
(Wiring
harness12 vovside) terminal volt-Fusible link (3)Replace theblownfusible link
age (5-Ground)Damaged or dis-Repair the har-connected har-nessness
1 TSB Revision

Downloaded from www.Manualslib.com manuals search engine 54-232CHASSIS ELECTRICAL - Theft-alarm System
14. HEADLIGHT ACTIVATION CIRCUIT

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Description of operationThe ECU transistor is turned ON if the vehicles
door, etc. are opened without use of the key. This
energizes the headlight relay to active the headlight.Checking the headlight activation circuit (Disconnect
the connector of the ECU, then short-circuit terminalconnector 2, and activate the headlight relay.)
TSB Revision