ESP MITSUBISHI 3000GT 1991 Workshop Manual

INTERIORCONTENTSNWAA-A~
FLOOR CONSOLE*
____....._.........__._..._......_..._...... 11
REAR SEAT . .._._____..______....____.._.._._..___.._._____.....___....24
FRONT SEAT*
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18SEAT BELT*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25IHEADLINING
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17TRIMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12INSTRUMENT PANEL*
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . .
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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 beremoved/installed in connection with SRS service or maintenance) are indicated in the table of contents byan asterisk (*).
WARNING!(I)Improper service or maintenance of any component of the SRS, or any SRS-related component, can lead topersonal 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.
2I

52A-24INTERIOR - Rear Seat
REAR SEAT
REMOVAL AND INSTALLATION
Rear seat removal steps
l * I)*1. Rear seat cushion
2. Rear seat back
Striker removal steps
3. Quarter trim (Refer to P.52A-14.)4. StrikerlQFtX-I67
Rearseat beltbuckles
Lock dat
Hole in flo\ori-19FOO95
SERVICE POINT OF REMOVAL1. REMOVAL OF REAR SEAT CUSHION
With the lever pulled, raise the seat cushion, and remove
the seat cushion.
SERVICE POINT OF INSTALLATION
1. INSTALLATION OF REAR SEAT CUSHION
(1) Fit the attachment wire of the seat cushion under theseatback positively.
(2)Pass the rear seat belt buckle through the seat cushion.
(3) Insert the lock plate of the seat cushion in the
respective holes provided in the floor.
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528-l
L’ SUPPLEMENTAL
RESTRAINT
SYSTEM (SRS)
CONTENTSM52AA-B
GENERAL INFORMATION
................................ComponentLocation
........................................
Configurati0.nDiagrams....................................Construction
Diagram........................................Introduction
........................................................SRS Circuit Diagram
......................................../idSRSConnector Construction............................SRS Schematic
................................................Warning/Caution
Labels....................................
SPECIFICATIONS................................................ServiceSpecification
........................................SRS MAINTENANCE AND
POST-COLLISION DIAGNOSIS........................Post-collisionDiagnosis
....................................Maintenance
....................................................
SRS SERVICE PRECAUTIONS........................Test Equipment To Be Used
For Troubleshooting
........................................
TROUBLESHOOTING........................................DiagnosticSequence
........................................SRS Diagnostic Procedures
-Initial Steps
....................................................
2
13
7
3
2
11
9
6
4
15
15
49
54
49
14
16
17
18
17
INDIVIDUAL COMPONENT
SERVICE. . . . . . . . . . . . . .._................................56AIR BAG MODULE AND CLOCK
SPRING
._..........._......................._.........._............... 62
AIR BAG MODULE DISPOSAL
PROCEDURES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69Air Bag Remote Deployment Devices
. . . . . . . . . . . .69Deployed Air Bag Module Disposal
Procedures . .
.._..........._....................................... 72
Undeployed Air Bag Module Disposal
. . . . . . . . . .69
FRONT IMPACT SENSORS ._....: _._..._..................56
SRS DIAGNOSIS UNIT (SDU) . . . . . . .._...................59
CAUTIONlCarefully read and observe the information in the SRS SERVICE PRECAUTIONS (P.52B-14) prior to any service.l For information concerning troubleshooting or maintenance, always observe the procedures in the
Troubleshooting
(P.52B-17) or the SRS Maintenance and Post-collision Diagnosis (P.52B-49) sections,_respectively.lIf any SRS components are removed or replaced in connection with any service procedures, be sure to follow
the procedures in the INDIVIDUAL COMPONENT SERVICE section (P.52B-56) for the components involved.l In case of any questions about the SRS, call the regional Tech Line at l-800-446-6064.

52B-26 SUPPLEMENTAL RESTRAINT SYSTEM (SRS) - Troubleshooting
TEST 5REPAIR REQUIRED FOR "11. G-SENS. TRBL I”, “12. G-SENS. TRBL 2” or
“13. G-SENS. TRBL 3” FAULT
SRS DIAGNOSIS UN1
IMPACT S!NSOR~M&N"E DETECTION
FRONT IMPACTSENS0RtL.H.)FRONT IMPACTsEN80R(R. H. )--u-~,w-*
Front impact sensor resistance checkDigital multi-meter
r ~1iii”~“‘.,,,,/ ?\I. I,// q
NOTEIf combined front impact sensor and air bag module (squib) failure modes simultaneously occur in two places,
the preconditions for the respective detection circuits will go out of order. For this reason, both diagnosis
codes may not be stored but only one of them may be indicated.
Their relationships are shown in the following table.
Front impact sensors
Air bag module
(Squib)Short-circuitedOpen-circuitedShort-circuited
11 and/or 21
11 and/or 22One open-circuitedTwo open-circuited12 and/or 2113 and/or 21I12 and/or 2213 and/or 22
I
The numbers in the boxes are diagnosis codes numbers. (Refer to P.52B-20.)
/SRS diagnosis unit
View A
13u070rTo frontimDact sensor
(L.H.)
ITo clock springI19FOllO
To body wiring harness (14-pin)
lQFO102
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LSUPPLEMENTAL RESTRAINT SYSTEM (SRS)
- Troub!eshooting 529-29
/ CONTINUED FROM PREVIOUS PAGE/*
(1)Connect the red 2-pin connector @ of the SRS CheckHarness to the SDU in place of the now-disconnected clock spring-SDU connector.
NOTEA 3-ohm resistor that corresponds to the resistance
of the air bag module (squib) and the wiring resis-
tance is connected between the terminals of the
connector
@ of the SRS Check Harness.
(2)Reconnect blue.and yellow connectors, for the wiring
leading to the front impact sensors, to the SDU anddouble lock them. (Refer to
P.52B-9.)
NOTEIf double locking cannot be made, the connector isincorrectly or incompletely inserted; re-check to
insert the connector correctly and securely.
”
CONTINUED ON NEXT PAGEIMB991 349
SRS Check Harness
SRS CheckHarness
\ ii%\19FOO93NOTE
- IMPORTANT
(I) 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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id
cSUPPLEMENTAL RESTRAINT SYSTEM (SRS)
- Troubleshooting 52B-31
1 CONTINUED FROM PREVIOUS PAGE(
(1) Remove the air bag module. (Refer to P.52B-62.)(2) Join the No. 2 and No. 7 connectors of the clock
spring to SRS Check Harness connector @ and SRSCheck Harness connector 0, respectively.
NOTEWhen joining SRS Check Harness connector 0, alignits white paint with the hollow portion of the No. 2
connector of the clock spring.
19FO109
MB991349
SRS Check Harness
No. 2 connector
of the clock spring
16R2190
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SUPPLEMENTAL RESTRAINT SYSTEM (SRS) - Troubleshooting 52B-33
1 TEST 6 )REPAIR REQUIRED FOR “21. SQUIB TRBL 1” or “22. SQUIB TRBL 2” FAULT1
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FRONTSIDE
Ez
IGNITION SWITCH(IG1)CautionNever attempt to measure the circuit resistance of
the air bag module
(squib) even if you are using thespecified tester. If the circuit resistance is measuredwith a tester, accidental air bag deployment will
result in serious personal injury.
SRS DIAGNOSIS UNIT
------I
SELF-DIAGNOISISCHECK CONNECTOR(FOR MULTI-USETESTER)ms!+Ax-Pls95-Y
J/B
AIR (BSAgGU#DULEView A
SRS diagnosisunit
13uo704
To front impact sensor (L.H.1
\To front impact sensor (R.H.)
Todock springI19FOllOTo body wiring harness (IQpin)
No
Have the other diagnosis code test(s)/> Perform the other diagnosis
been finished?code test(s) prior to this test.
/I
Yes
NOTE
If combined front impact sensor and air bag module (squib) failure modes simultaneously
occur in two places, the preconditions for the respective detection circuits will go out of
order. For this reason, both diagnosis codes may not be stored but only one of them may
be indicated.Their relationships are shown in the following table.
Front impact sensors
Short-circuited One open-circuited Two open-circuited
Air bagShort-circuited11 and/or 2112 and/or 2113 and/or 21
module(Squib)Open-circuited11 and/or .2212 and/or 2213 and/or 22
The numbers in the boxes are diagnosis codes numbers. (Refer to P.52B-20.)
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526-34 SUPPLEMENTAL RESTRAINT SYSTEM (SRS) - Troubleshooting
CONTINUED FROM PREVIOUS PAGE
c
(1) Turn the ignition key to the “LOCK” position,
disconnect the negative battery cable and tape the
terminal.
CautionWait at least 30 seconds after disconnecting the
battery cable before doing any further work. The
SRS system is designed to retain enough voltageto deploy the air bag for a short time even after
the battery has been disconnected, so serious
injury may result from unintended air bag deploy-ment if work is done on the SRS system im-
mediately after the battery cable is disconnected.(2) Remove the rear console assembly. (Refer to
GROUP 52A - Floor Console.)(3) Use a screwdriver to push in the lock spring of the
lock lever of the SRS diagnosis unit to unlock the locklever.
CautionA double-lock mechanism is employed for the
connector of the SRS diagnosis unit, so care mustbe taken not to damage it by using excessive
force or by not disconnecting it correctly.
(4) Disconnect the red
2-pin connector from the SDU
while pressing down the lock of the connector.
(Refer to
P.52B-9.)
/Lock spring
/Clock spring
I\(I) Connect the red connector @ of the SRS CheckHarness to the SDU instead of the now-disconnectedharness-side connector of the SDU, which were
connected to the air bag module (squib) through the
clock spring.
NOTE
SRS Check HarnessA
3-ohm resistor that corresponds to the resistance
of the air bag module (squib) and the wiring resis-
tance is connected between the terminals of the
connector
@ of the SRS Check Harness.
(2) Make the double locking.
NOTEIf double locking cannot be made, the connector is
incorrectly or incompletely inserted; re-check to
insert the connector correctly and securely.Connector @ ofSRS Check Harness
(3R)19 FOO9:
1
/
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52B-36 SUPPLEMENTAL RESTRAINT SYSTEM (SRS) - Troubleshooting
1 CONTINUED FROM PREVIOUS PAGE1(I) Remove the air bag module. (Refer to
P.52B-62.)(2) Join the No. 2 and No. 7 connectors of the clockspring to SRS Check Harness connector @ and SRSCheck Harness connector 0, respectively.
NOTEWhen joining SRS Check Harness connector 0, alignits white paint with the hollow portion of the No. 2
connector of the clock spring.
19FO109
MB991349
SRS Check Harness
No.2 connector
of the clock spring
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/
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52B-66Air Bag ModuleSUPPLEMENTAL RESTRAINT SYSTEM (SRS) - and Clock SpringMB991349
SRS CHeck Harness
No.7 connectcNo. 2 connector
View A
SRS Check Harness connector
16R219C
19FOlO!I
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(4) Joint the No. 2 connector (air bag module side) and No. 7
connector of clock spring to connector @ and connector
@,respectively, of the SRS Check Harness.
NOTEWhen joining SRS Check Harness connector
(4) , align its
white paint with the hollow portion of the No. 2 connector
of the clock spring.
(5) Check for continuity between terminal 1 and terminal 21,
and terminal 2 and terminal 22, of SRS Check Harness
connector @ ,
using a digital multi-meter.
Standard value: less than
0.452(6) If, as result of above checks, even one abnormal point is
discovered, replace the clock spring with a new one.
SERVICE POINTS OF INSTALLATION
PRE-INSTALLATION INSPECTION
(I) Before the clock spring and air bag module are installed in
the vehicle, they must be visually inspected.
If a dent, crack or other deformation, or any rust, is
detected, discard the clock spring and/or air bag module
and replace it with a new one that passes the visual
inspection.
CautionDispose of an air bag module only according to the
specified procedure. (Refer to
P.52B-69 to P.52B-72.)(2) Before the clock spring is installed in the vehicle, the
resistance between No. 2 and No. 7 connectors of clock
spring must be confirmed to be within standard value; less
than
0.4(2.Use the SRS Check Harness and digital multi-meter. (Refer
to “CHECKING THE CLOCK SPRING”.)
If the clock spring is not within that standard value range,
discard it and replace it with a new one that has the proper
standard value.
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LA