fuse MITSUBISHI 3000GT 1991 Owner's Manual

EXTERIOR - Windshield WiDer and Washer51-315. WASHER SWITCH INPUT CIRCUIT
lgnitlon swatch (ACC)
Columnswitch
ETACS unit(ECU)*,
-7-l
Junction block15~ @ (Multi-purpose fuse)
ON-time detec-\I\I1a
“I : Vehicles without theft-alarm system
“2: Vehicles with theft-alarm system16FO323
Operation Description
While the washer switch is ON, HIGH-level signals are sent to the washer switch ON-time detection circuit
simultaneous with the activation of the washer motor, thus causing the transistor to be switched ON and the
wipers to be activated for a certain fixed time.
Electronic Control Unit Terminal Voltage (Connection Status of Electronic Control Unit Connector)
ECUterminal No.58”’
60*2Signal
Washer switch signal
Status
Ignition switch
“ACC”Washer switch “OFF”Washer switch “ON“
Terminal
voltageov
System
voltage
NOTE*I : Vehicles without theft-alarm system
“2: Vehicles with theft-alarm systemChecking Individual Part
Washer switch: Refer to
P.51-33
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INTERIOR - Troubleshootinn52A-5OPERATION
l If the driver fastens the seat belt with the
ignition switch placed in the “ON” position, the
seat belt switch in the seat belt buckle is turned
“ON” to operate the seat belt solenoid in the
retractor.
lThis will reduce the seat belt rewinding torque
to minimize a sense of oppression given by the
belt.
lOwing to the timer function of the ETACS unit,
the seat belt solenoid is kept in operation for 30
seconds after turning off the ignition switch,
with due consideration to elimination of the
sudden rise in a sense of oppression caused by
the belt immediately after the ignition switch is
turned off.
COMPONENT LOCATION
ETACS unitNameSymbolA19FO134TROUBLESHOOTING HINTS
The seat belt solenoid does not function
(I) The power window does not operate as well.
lCheck the ETACS unit. (Refer to GROUP 42-Power Window.)
(2) The power window operates.
l Check dedicated fuse No. 1 and 19.
(3) Some of the tension reducers do not operates
l Check the inoperative seat belt switch.
l Check the inoperative seat belt solenoid.
I
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INTERIOR - Troubleshooting52A-7OPERATION
Key-reminder warning
L0 Battery voltage is always supplied, through
fusible link No. 6 to the key-reminder switch.
l When the driver’s seat is opened while the
ignition key is still in the key cylinder, the door
switch is switched ON, electricity flows to
fusible link No. 6, the key-reminder switch, the
buzzer, the door switch, and ground, and the
buzzer sounds.
Seat belt warning
lBattery voltage is applied, through fuse No. 11
to the ETACS unit when the ignition key is at the
“ON” position.
l Electricity flows to fusible link No. 6, the seat
belt warning light, the ETACS unit, and ground,
and the seat belt warning light flashes for
approx. 6 seconds.
lIf the driver does not buckle the seat belt, the
seat belt switch is switched ON, electricity
flows to fusible link No. 6, the key-reminder
switch, the buzzer, the seat belt switch, the
ETACS unit, and ground, and the buzzer sounds
for approx. 6 seconds.
lWhen the driver buckles the seat belt, the seat
belt switch is switched OFF and the buzzer
stops.
COMPONENT LOCATION
Name1 Symbol (
ETACS unitIA t19FO134TROUBLESHOOTING HINTS
Key-reminder warning
The key-reminder warning doesn’t sound.
(I) The seat belt warning function is OK.
l Check the door switch.
(2) The seat belt warning also doesn’t function.
l Check the buzzer.
Seat belt warning
1. The seat belt warning doesn’t function.
(I) The seat belt warning light flashes.
l Check the seat belt switch.
(2) The seat belt warning light also does not
function (and the key-reminder warning also
does not function).
l Check the key-reminder switch.
2. The buzzer doesn’t stop even though the driv-
er’s seat belt has been buckled.
l Check the seat belt switch.
3. The seat belt warning light doesn’t flashes (but
the buzzer sounds).
l Check the light bulb.
NOTEFor the inspection of the ETACS unit, refer to
P.52A-25.16FO35
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INTERIOR - Seat Belt52A-25
Diagnosis connector”LJ’2OFOOl
GW161,338
With voltmeter___.-- -- ~~--~_. ___-- ..-.. .-.-
With multi-use tester
SEAT BELTM52UGEH
TROUBLESHOOTING GUIDE
INPUT CHECKUsing the multi-use tester or voltmeter, check whether or not
the input signals from each switch are being input to the
ETACS unit.
(1) Connect the multi-use tester to the diagnosis check
connector located at the right side of the junction block or
connect the voltmeter between the ETACS terminal and
the ground terminal.
(2) Check if the buzzer of the multi-use tester sounds or the
needle of the voltmeter moves when each switch noted
below is operated.
If the buzzer sounds or the needle moves, the input signals
are being input to the ETACS unit, so that switch can be
considered to be functioning normally. If not, the switch or
switch input circuit is faulty. Check the switch and the
switch input circuit.
l Ignition switch
II
TROUBLESHOOTING QUICK-REFERENCE TABLE
Problem
The warning light does notflash and the warning buzzer
also does not sound.
Probable cause
Damaged or discon-nected wiring of the
ignition switch input
circuit
Damaged or discon-nected wiring of theseat belt warning
and buzzer activa-
tion circuit
Blown fuse
Malfunction of theelectronic control unitCheck method
If a malfunction is in-
dicated as a result of
checking the inputsignals, check by follow-
ing individual part and
the circuit check No. 1
procedures (P.52A-27).
Check by following in-dividual part and the
circuit check No. 2
procedures (P.52A-28).
-
Repair the wiringharness.
Replace the fuse.
Replace the electron-
ic control unit.
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52A-28INTERIOR - Seat Belt2. SEAT BELT WARNING LIGHT AND BUZZER ACTIVATION CIRCUIT
Fusible link @
Junctron block(Multr-purpose fuse)
ETACS unit (ECU)Description of operation
Place the ignition switch in the ON position, and the transistor will be turned on, blinking the warning light and
sounding the buzzer four times. However, the warning buzzer will not sound unless the key-reminder switch
and seat belt switch are in the ON position.
Electronic control unit terminal voltage (Disconnect the connector of the electronic control unit andcheck the wiring harness side.)
IIIIIECU terminal No. Signal
ConditionTerminal
voltageI\!
Warning light signalAt all timesSystem
6*1voltage
Warning buzzer signal
Key-reminder switch or seat belt switch “OFF”ov8*2
Key-reminder switch and seat belt switch “ON”System
voltage
NOTE“1. Vehicles without theft-alarm system
“2: Vehicles with theft-alarm systemChecking the individual part
Key-reminder switch: Refer to GROUP 54
- Ignition Switch.dSeat belt switch: Refer to
P.5?A-30.
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52B-6SUPPLEMENTAL RESTRAINT SYSTEM (SRS) - General Information
;RS SCHEMATIC
STARTER RELAYIGNITION SWITCH MIT
I
‘dIGNITION SWITCH
IMulti
-purpose fuses
Connector
lock switch
----
r
1
UNLOCKiM/T -AA
IWarning light
malfunction
detection circuitICrank signal detection circuit
Connector lock
detection circuit
Safing
impact
sensor
1
N
i-Multi-use ,
Tester
interface
circuit
Self-diagnosis
check connector
(For Multi-use
Tester)
19FO141Front impact
sensor
(L.H.)Clock spring
Front impact
sensor (R.H.)IP-l-Air bag
module
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52B-12SUPPLEMENTAL RESTRAINT SYSTEM (SRS) -General Information
CAUTION1.DO not repair, splice or modify SRS wiring (except for specific repairs to the body wiring harness shown on page QB-14
2.replace wiring if necessary, after reading and following all precautions and procedures in this manual.DO not use an analogue ohmmeter to check SRS wiring or components; use only special tools and digital multi-metershown on page 52B-16.
12B-W2B-W
,, 7
B-WI\.J/B0(MULTI-PURPOSEFUSES)
10A
0.85B-WI' 2
---_-__--_----_--------~---~~~--~~--~~-~-~----~---- --_5SRS DIAGNOSIS UNIT
= CONSTANT4I- -xI
> VOLTAGE CIRCUITCONDENSIDETECTIL,. vAI\vvII ,
vvvn ,n N~,11rrnm,vn
Ttttlr .,,,,,,a
l@i fTii51 l@!l %piJ’
/
-i----
EBI
102!x 101
‘o’ @ii?r
i 1I
z
dd
3) clEl $1BVIi2VI
Qy y2 qli y jl y2/
FRONTIMPACTFRONT ' - ' '
SENSOR
I!?--
IMPACT
SENSOR
(L.H.)OFF -If-(R. H. )II
CLOCKSPRING
(5QUIBjAIR QA$e_MODULE
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.52B-14 SUPPLEMENTAL RESTRAINT SYSTEM (SRS) - SRS Service Precautions
SRS SERVICE PRECAUTIONSMBZPBAA
1.In order to avoid injury to yourself or others from3.accidental deployment of the air bag during SRSNever Attempt to Repair the Following Com-servicing, read and carefully follow all the
pre-
ponents:dcautions and procedures described in this
manu-l Front Impact Sensors
al.l SRS Diagnosis Unit (SDU)
2.Do not use any electrical test equipment on orl Clock Spring
near SRS components, except those specifiedl Air Bag Module
on
P.52B-16.If any of those components are diagnosed as
Never use an analogue ohmmeter.faulty, they should only be replaced, in accord-
ance with the INDIVIDUAL COMPONENT SER-
VICE procedures in this manual, starting at page
[52B-561.
4.Do not attempt to repair the wiring harness connectors of the
SRS. If any of the connectors is diagnosed
as fault, replace the wiring harness. If the wires are diagnosed as faulty, replace or repair the wiring
harness according to the following table.
SDUTerminalNo.
Harness
Connector
(No. ofTerminals,Color)
101
102
2pins,red
51
52
2pins,yellow
12pins,
blue
2
II
II
I2 IIi
I3 I
4
t---i
14 pins,
5red
16 t
LDestination of Harness
Clock springReplace clock
spring.
Bodywiring
*
HarnessFront wiring
* HarnessFront impact+ sensor (LH)
Replace withsensor cable.*
Front wiring
--) HarnessFront impact* Sensor (RH)
--
-+ Diagnosis check pinCorrect or replace
-+ Control wiring harness+ Ignition switch (ST). control wiring,
instrument panel
-+ General purpose fuse No. 11wiring harness
or body wiringharness.+ General purpose fuse No. 18
Instrument panel+ wiring harnessSRS warning* light
-I-
~ JunctionBpdYCorrect or replace
block-+ wrnng-+ Groundharnessbody wiring harness.
NOTE(I)
(2)The sensor cable marked with * is available as service part.
The sensor cable used as a replacement part is routed along the body wiring harness.
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SUPPLEMENTAL RESfRAlNT SYSTEM (SRS) - Troub!eshooting 52B-17TROUBLESHOOTING
M52ECAA
idSRS DIAGNOSTIC PROCEDURES
- INITIAL STEPS’FOLLOW THESE STEPS WHEN BEGINNING ANY SRS SERVICE:
/II/ ,- -u’ 16FO304
SRS warning light
Multi-use fester
(MB991341)RbM pack(MB991359)
Diagnosis/
service data
output
Ground
16LOO9
[TSB
1. Check the SRS fuses (multi-purpose fuses No. 11 and No.
18).If either is loose, tighten it; if damaged or blown, replace it.
.
2.After performing step 1, start engine. Does “SRS” warning
light
illumi.nate for about 7 seconds and then turn OFF? If
yes, SRS system is functioning properly.
If no, continue with following steps.
NOTEIf the battery power supply (multi-purpose fuses No. 11 or
No. 18) is disconnected with the ignition key in the “ON”
position, the SRS warning light will continue to illuminate
even after the fuses are replaced in their original positions.
In this case, the SRS warning light can be extinguished by
turning the ignition switch ON and OFF
10 times.
3. Turn the ignition key to the “LOCK” position.
4. Insert ROM pack into the Multi-use Tester and connect
tester to Diagnosis Check Connector in glove compart-
ment.
5. Start the SRS diagnosis,by conducting TEST 1
(SRSwarninq liqht does not extinguish) or TEST 2 (SRS warning
light does- not illuminate.) which begins on next page or
page
[52B-191.
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SUPPLEMENTAL RESTRAINT SYSTEM (SRS) - Troubleshooting 52B-21
/
id
FaultDiagnosis code nameNo.[Failure mode]Explanation
Service
41
IG VOLT LOW 1The multi-purpose fuse (No. 18) is blown or the wirefrom the fuse to the SDU is open-circuit or itsresistance value is increased.
It takes at least 5 seconds that the SDU detects
this fault.
Perform TEST 9
42
IG VOLT LOW 2The multi-purpose fuse (No. 11) is blown or the wirefrom the fuse to the SDU is open-circuit or itsresistance value is increased.
It takes at least 5 seconds that the SDU detects
this fault.
Perform TEST 10
SRS LMP TRBL 1
i
The SRS warning light circuits are open or the wireWhen SRS warning lightOpen circuit orfrom the light to the SDU is grounded.does not extinguish:43ground shortIIt takes at least 5 seconds with the light OFF thatPerform TEST 11the SDU detects this fault.When SRS warning light
does not illuminate:
Perform TEST 12
SRS LMP TRBL 2The SRS warning light drive transistor (integrated
(1) Turn the ignition key
44SRS warning light
[I
in the SDU) is open-circuit.to the “LOCK” posi-
drive transistortion, disconnet the
is open-circuitnegative battery
cable and tape the
SRS DIAG. UNITThe EEP ROM or A/D converter (integrated in the SDU)terminal.is defective.(2) After waiting at
45least 30 seconds,
replace the SDU.
(Refer to P.52B-59.)
/NOTE -IMPORTANT
b(1) After repairing the SRS, reconnect the battery cable, erase the diagnosis code memory from theMulti-use Tester and check the SRS warning light operation to verify the system functions
properly. (Refer to TEST 1.)
(2) SDU
= SRS Diagnosis Unit
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