belt MITSUBISHI 3000GT 1991 Workshop Manual

52A-26
INTERIOR - Seat Belt
Problem
The warning light flashes, but
the warning buzzer does not
sound.Probable cause
Damaged or discon-netted
wiring of the
seat belt warning
buzzer activationcircuit
Check method
Check by following in-dividual part and the
circuit check No. 2
procedures (P.52A-28).
Remedy
Repair the wiring
harness,
The warning buzzer sounds, but
the warning light does not flash.
The warning light stays on.
The warning light keeps blinking
Malfunction of theReplace the warning
warning buzzerbuzzer.
Malfunction of theReplace the key re-key reminder switch orminder switch or the
the seat belt switchseat belt switch.
Damaged or discon-Check by following in-Repair the wiringnetted wiring of thedividual part and theharness.seat belt warning lightcircuit check No. 2activation circuitprocedures (P.52A-28).
Bulb worn outReplace bulb.
Short-circuit of theCheck by following in-Repair the wiringseat belt warningdividual part and cir-harness.
light and buzzer
cuit check No. 2 pro-activation circuit
cedures (P.52A-28).
Malfunction of theReplace the electron-electronic control unitic control unit.
Malfunction of the-Replace the electron-electronic control unitic control unit.
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INTERIOR - Seat Belt52A-27
CHECKING INDIVIDUAL PART AND CIRCUIT
IGNITION SWITCH INPUT CIRCUITBattery
Fusible link
2oB-y~~/l,l(l,l,,~~ !jw u03w
30AJunction block
*I : Vehicles without theft-alarm system“2: Vehicles wtth theft-alarm system16FO35.3
It/Description of operationA condition for operation of this system is the sending of HIGH-level signals to the electronic control unit
when the ignition switch is switched to the “ON” position.
Electronic control unit terminal voltage (Disconnect the connector of the electronic control unit andcheck the wiring harness side.)
IECU terminal No. SignalCondition-1 ~StandardI
52Ignition switch “ON”Ignition switchOFF
ONov
System
voltageChecking the ground circuit (Disconnect the connector and check the wiring harness side.)
Terminal No.Connected to/measured part
57,’Electronic control unit ground
59*2
NOTE
*I : Vehicles without theft-alarm system
“2: Vehicles with theft-alarm systemMeasurementTester
connectronCheck conditionsStandard
Resistance
57*‘-groundAt all timesContinuity
59*.‘-groundChecking the individual part
Ignition switch: Refer to GROUP 54
- Ignition Switch.
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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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INTERIOR - Seat Belt52A-29
REMOVAL AND INSTALLATION
---nOuter seat belt removal steps
7 -$g%,* ‘9‘A. .‘j,,,
,y4
PII \,:0,+i.1$_ a1
y’
r‘J w
\7
\,%/
%
D
$!& ,2
4,.$#.,
,45 Nm
33 ftlbs.
6
1. Quarter trim (Refer to P.52A-14l +2. Outer seat belt
Inner seat belt removal steps
Floor console assembly(Refer to P.52A-11 .I
3. Shield coverl a4. Inner seat belt
Buzzer removal steps
Floor console assembly(Refer to P.52A-1 j .)
5. Buzzer
4
/45 Nm
.)
19FOl52
Outer seat belt removal steps
1. Quarter trim (Refer to P.52A-14.)l a6. Outerseat belt
Inner seat belt removal steps
Rear seat cushion (Refer to P.52A-24.)
7. Inner seat belt
8. inner seat belt bracket
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52A-30
INTERIOR - Seat Belt
16M456
NOTEO-O indicates that there is continuity between the terminals.
BUZZERCheck that buzzer sounds when battery voltage is applied to
the buzzer terminal.
Paw1 to
prevent
\1retractor
Bead
INSPECTION
BUCKLE SWITCH(1) Disconnect the buckle switch connector.
(2) Check the continuity between the terminals.
Terminal
1234
Buckle unlock00
Buckle lock00
i
“..i,Tlmdsmrawlro -6I J3JJAdjuster’bracketJ’JJ’ prevent
rotation19FO128
Paw1 to prevent
rotation19FO120
SERVICE POINTS OF INSTALLATION6. INSTALLATION OF OUTER SEAT BELT
(1) Positively insert the
paw1 to prevent the retractor from
rotating in the hole provided on the body.
(2) Install the anchor plate along the bead of the body.
4. INSTALLATION OF INNER SEAT BELT
(1) Route the seat belt switch connector harness on the
adjuster bracket.
(2) Use clips to secure the harness to the adjuster bracket.
(3) Fit the locking claw of the inner seat belt positively in
the locking hole provided in the seat bracket.
2. INSTALLATION OF OUTER SEAT BELT
(1) Positively insert the
paw1 to prevent the retractor from
rotating in the hole provided on the body.
(2) After connecting the seat belt harness with the body
harness, insert the clip on the connector into the hole
on the body panel.
LA
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INTERIOR - Seat Belt52A-31(3) Insert the pawl of the belt guide in the hole provided on
the body.
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52B-2SUPPLEMENTAL RESTRAINT SYSTEM (SRS) - General informationGENERAL INFORMATION
INTRODUCTIONThe Supplemental Restraint System (SRS) is de-
signed to supplement the driver’s seat belt to help
reduce the risk or severity of injury to the driver by
activating and deploying a driver’s-side air bag in
certain frontal collisions.
The SRS consists of: left front and right front impact
sensors located, one each, on the right and left front
upper frame lowers; an air bag module located in
the center of the steering wheel, which contains the
folded air bag and an inflator unit; the SRS diagnosis
unit located under the rear console assembly, which
monitors the system, and which contains a safing
impact sensor; an SRS warning light located on the
instrument panel, which indicates the operational
status of the SRS; a clock spring interconnection
located within the steering column; system wiring
and wiring connectors; and a knee bolster located
SRS warning light
M52BAAFunder the steering column.
The SRS is designed so that the air bag will deploy
when the safing sensor, plus either or both of the
left front and right front impact sensors simul-
taneously activate while the ignition switches
“ON”.
That is designed to occur in frontal or near-frontal
impacts of moderate to severe force.
Only authorized service personnel should do work
on or around the SRS components. Those service
personnel should read this manual carefully before
starting any such work. Extreme care must be used
whenservicing the SRS, to avoid injury to the
service personnel (by inadvertent deployment of the
air bag) or the driver (by rendering the SRS inopera-
tive).
SELF-DIAGNOSIS/SRS WARNING LIGHT FUNCTION
The diagnosis unit monitors the SRS system and stores data
concerning any detected faults in the system. When the
ignition key is in “ON” or “START” position, the SRS warning
light should illuminate for about 7 seconds and then turn off.
That indicates that the SRS system is in operational order. If the
SRS warning light does any of the following, immediate
inspection by an authorized dealer is needed.
(1) The SRS warning light does not illuminate as described
above.
(2) The SRS warning light stays on for more than 7 seconds.
(3) The SRS warning light illuminates while driving.
If a vehicle’s SRS warning light is in any of these three
conditions when brought in for inspection, the SRS system
must be inspected, diagnosed and serviced
In accordance wrth
this manual.
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52B-4SUPPLEMENTAL RESTRAINT SYSTEM (SRS) - General lnform=*ion
WARNING/CAUTION LABELSA number of caution labels relating to the SRS are
SRS.found in the vehicle, as shown in the followingIf labels are dirty or damaged, replace them with
illustration. Follow label instructions when servicingnew ones.
//----?9FO143
A.
H19FOO87
19FOO80WARNING
This vehicle has a supplemental driver’s side air
bag.Refer to service manual before servicing or
disassembling underhood components. Read
“SRS” section of manual for important instruc-
tions.
Improper service procedures can result in the
air bag firing or becoming inoperative, leading
to injury.
_ B. CAUTION: SRS
~1
C.This vehicle has a driver’s side air bag to
supplement the driver’s
seatbelt in certain
frontal collisions.
The driver and all other occupants must wear
seatbelts at all times to reduce possible injury.
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SUPPLEMENTAL RESTRAINT SYSTEM (SRS) - General lnform=*ion52B-5
r1.c
L
E.
,
iiCAUTION: SRS diagnosis unit
This unit cannot be repaired.
If defective, remove and replace entire unit per
service manual instructions.
Do not disassemble or tamper.
See service manual for handling and storage
instructions.Driver’s air bag information
This vehicle
ha% an air bag which will supple-
ment the driver’s seatbelt in certain frontal
collisions. The air bag is not a substitute for the
driver’s seatbelt in any type of collision. The
driver, and all other occupants, should wear
seatbelts at all times.
WARNING!
If the “SRS” warning light does not come.on
for about 7 seconds when ignition key is turned
to “ON” or engine is started, or if it stays on
while driving, drive the vehicle to your nearest
authorized dealer right away. Also do so if
vehicle’s front end is damaged or if air bag has
deployed.
The air bag system must be inspected by an
authorized dealer ten years after vehicle manu-
facture date shown on certification label lo-
cated on left front door-latch post or door
frame.Read “SRS” section of your owner’s manual
before driving, for important information, about
Dperation, service and disposal of the air bag
svstem.
Do no drop: keep dry.
Failure to follow instructions could render air
bag inoperative and result in driver injury.
F. CAUTION: SRS
Before replacing steering wheel, read service
manual, center front wheels
ahd align SRS
clock spring neutral marks.
Failure to do so may render SRS system
inoperative, risking serious driver injury.
I.
J.WARNING: SRS
This air bag module cannot be repaired. Do not
disassemble or tamper.
Do not perform diagnosis. Do not touch with
electrical test equipment or probes. Refer to
service manual for further instructions, and for
special handling, storage and disposal proce-
dures.
Tampering or mishandling can result in injury.
Danger! Poison. Keep out of the reach of
children.
Contains sodium acid and potassium nitrate
contents are poisonous and extremely flamm-
able. Contact with acid, water, or heavy metals
may produce harmful and irritating gases or
explosive compounds. Do not dismantle, in-
cinerate or bring into contact with electricity or
store at temperatures exceeding
(93.3”C)
200°F.Fast aid: If contents are swallowed induce
vomiting. For eye contact flush eye with water
for 15 minutes. If gases from acid or water
contact are inhaled, seek fresh air. In every
case, get prompt medical attention.
For additional information, see material safety
data sheet (MSDS) for this product.
CAUTION: SRS clock spring
This is not a repairable part. Do not disassem-
ble or tamper.
If defective, remove and replace entire unit per
service manual instructions.
Before replacement, read service manual, cen-
ter front wheels and align neutral marks.
Failure to
foHow instructions may render SRS
system inoperative, risking serious driver in-
jury.CAUTION: SRS
Before removal of steering gearbox, read ser-
vice manual, center front wheels and remove
ignition key.
Failure to do so may damage SRS clock spring
and render SRS system inoperative, risking
serious driver injury.
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55-1
HEATER, AIR
CONDITIONER
AND VENTILATION
CONTENTSM55AA- -
HEATERS AND AIR CONDITIONING................3HEATER UNIT*........................................................................22
SPECIFICATIONS
....................................................................3REFRIGERANT LINE................................................................35General Specifications
........................................................3RESISTOR................................................................................20Lubricants
............................................................................4SAFETY PRECAUTIONS........................................................9Sealant and Adhesive............................................................4
Service Specifications3SERVICE ADJUSTMENT PROCEDURES............................10........................................................
SPECIAL TOOLS4Charging Procedures............................................................11
i
........................................................................Charging the Refrigerant....................................................12Compressor Drive Belt Adjustment....................................11
HEATERS AND MANUAL AIR CONDITIONER5Compressor Noise................................................................16
................................................16
AIR CONDITIONER SWITCH................................................21Handling Tubing andFittings
Idle-up Operation Check....................................................17
BELT LOCK CONTROLLER20Performance Test................................................................15....................................................
BLOWER ASSEMBLYPower Relay Check............................................................17............................................................23Refrigerant Leak Repair Procedure....................................15COMPRESSOR........................................................................
27TestProcedures....................................................................10
CONDENSER AND CONDENSER FAN MOTOR................33TROUBLESHOOTING............................................................5
ENGINE COOLANT TEMPERATURE SWITCH....................
39VENTILATORS (AIR INLET AND AIR OUTLET)................38
EVAPORATOR
........................................................................
25VENTILATORS (INSTRUMENT PANEL)*............................36
HEATER CONTROL ASSEMBLY*
........................................18CONTINUED ON NEXT PAGE
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
(1)A Supplemental Restraint System (SRS), which uses a driver-side air bag, has been installed in the 3000GT.(2)The SRS includes the following components: impact sensors, SRS diagnosis unit: SRS warning light, air bagmodule, clock spring, interconnecting wiring. Other SRS-related components (that may have to be
removed/installed in connection with SRS service or maintenance) are indicated in the table of contents byan asterisk (*).
WARNING!(1)Improper service or maintenance of any component of the SRS, or any SRS-related component, can lead to
personal injury or death to service personnel (from inadvertent firing of the air bag) or to the driver (fromrendering the
SRS inoperative).(2) Service or maintenance of any SRS component or SRS-related component must be performed only at anauthorized MITSUBISHI dealer.
(3) MITSUBISHI dealer personnel must thoroughly review this manual, and especially its GROUP 52B
-Supplemental Restraint System (SRS), before beginning any service or maintenance of any component of theSRS or any SRS-related component.