1991 MITSUBISHI 3000GT diagram

FUEL SYSTEM - Throttle Body13-145Orifice
Nipple (green)3EM05iGroundThrottle
positlonsensor output
Idle-position
switchTh>ottle position
sensor power7FUO535(5) Disconnect the hand vacuum pump and connect it to the
other nipple.
(6)Make sure that the negative pressure leaks out as soon as it
is applied.
CLEANING THROTTLE BODY PARTS
(1) Clean all throttle body parts.
Do not use solvent to clean the following parts:
l Throttle position sensor (Idle position switch)
l Idle speed control servo
If these parts are immersed in solvent, their insulation will
deteriorate.
Wipe them with cloth only.
(2) Check if the vacuum
pot-t or passage is clogged. usecompressed air to clean the vacuum passage.
SERVICE POINT OF REASSEMBLY
M13SGAN4. INSTALLATION OF THROTTLE POSITION SENSOR
(1) Set the throttle position sensor to the throttle body as
shown in the diagram.
(2) After turning the throttle position sensor 90” in the
clockwise direction to set it, tighten by turning the
screw.
(3) Connect the circuit tester between 1 (ground) and 3
(output), or between 3 (output) and 4 (power). Then,
make sure that the resistance changes smoothly when
the throttle valve is slowly moved to the fully open
position.
(4) Check for continuity across terminals 2 (Idle position
switch) and 1 (ground) with the throttle valve both fully
closed and fully open.
IThrottle valve positionIContinuityI
Fully closedConductive
Fully openINon-conductiveIIf there is not continuity with the throttle valve fully
closed, turn the counterclockwise direction, and then
check again.
(5) If the above specifications are not met, replace the idle
position switch.
1 TSB RevisionI

14-4COOLING - Troubleshooting
CIRCUIT DIAGRAM
FUSIBL
RADIATOR
FAN ASSEMBLY
(RADIATOR
,
FAN MOTOR>r{
!&w
F
A-04X ,---LINK0
J
0A
j
IGNITION
J/B
lxI
ti
51.: ,A-07X
J1
>II
ticpLi6
m
R&
b3
,2L-R1
RADIATOR FAN ASSEMBLYL!a ml
T
X35-AC-NWOl-NY
TSB Revision

23-32AUTOMATIC TRANSAXLE - Troubleshooting
INSPECTION OF ELECTRONIC CONTROL SYSTEM COMPONENTS
1. WiringBased on the wiring diagram.check whether the continuity andgrounding of each harness is OK.
I
(
4
ContinuityII
+
Normal~ Improper connection of
connector, damaged ordisconnected harness,
or incorrect wiring con-
nection.
I
Reconnect the connec-tor; repair or replace theharness.Vary the thermo-sensitive part
2. Oil-temperaturefrom low temperature to highsensortemperature and check theresist-Damaged or disconnected
ante between the terminals 1 anwiring2or2and3.
4
J
Changes of the resistance con-Replace the oil-
tinuous and smooth.temperature sensor
41750447
Normal1
1:LOW temperature side2: Ground
3:High temperature side
I:3. Throttle-
K
Check the resistance between
Ip~~~t,ion sensorterminals 1 and 4 of the TPS.hiah or infinitem- -----inecteciI-
\ IDamaged or discon-..----Awiring
I
c3.5 - 6.5 kW20”C (68°F)t
v
Replace the TPS.I>ITPS terminal
7FUO5351. Ground
2. Idle switch
3. output
4. Power
Check the resistance betweenterminals 4 and 2 with the engine
idling after throttle-valve opening
warm-up.
Resistance: approx. 0.4
kR/20°C (68°F)
Changes of the resistance con-
tinuous and smooth.
/Resistance:\more or less
than 0.4 kQ/Improper adjustment
Istallaiion.I
Check for changes of theresist-ance between terminals 4 and 2when the throttle valve is
operated from the idling position
o the fully open position.
Poor contactII
TSB Revision

33B-1
ELECTRONIC
CONTROL
SUSPENSION
CONTENTSM33AA-B
CIRCUIT DIAGRAM
22SPECIAL TOOLS........................................................................3
................................................................
DAMPING FORCE CHANGEOVERSPECIFICATIONS....................................................................2
ACTUATOR................................................................................20General Specifications.......................................................2
ECS CONTROL UNIT................................................................21Service Specifications.......................................................3
ECS INDICATOR LIGHT............................................................20STEERING ANGULAR VELOCITYa .
ECS SWITCH............................................................................
19
G SENSOR................................................................................
19
POSITION DETECTION SWITCH............................................20
SERVICE ADJUSTMENT PROCEDURES
............................
12
On-Vehicle Inspection........................................................12
SENSOR*....................................................................................-IY
STOP LIGHT SWITCH............................................................20
THROTTLE POSITION SENSOR
............................................20
TROUBLESHOOTING............................................................4
VEHICLE SPEED SENSOR....................................................
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
(I)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, aiir bagmodule, clock spring, interconnecting wiring.Other SRS-related components (that may have 1:o 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 (from
rendering the SRS inoperative).
(2) Service or maintenance of any SRS component or SRS-related component must be performed only at an
authorized MITSUBISHI dealer.(3) MITSUBISHI dealer personnel must thoroughly review this manual, and especially its GROUP
Ei2B -Supplemental Restraint System (SRS), before beginning any service or maintenance of any component of theSRS or any SRS-related component.

33B-22 ELECTRONIC CONTROL SUSPENSION (ECS) - Circuit Diagram
CIRCUIT DIAGRAMM33ZEAB
TAILL-_
-
!
!-1
J/G
pyspq3 2 10’1? 12!~3 Ir. Eli
,lGH-.-
3&
Eiv,I
1 \L-2
E
s=
43
21_r
%c;
0
,-:=
J.4
T RELAY--
-1 F;;;CATED
-
1234
-m5578
__p7zERmj
FUSIBLE LINK@J/B
@
I 81GAI
ELECTROMIC CONTROLSUSPEldSiOi,dCONTRllL Ui'dIT
----- -m12123E>[1:
II
1u2m
II
JUIvPERBCONNECTOR
LEd1254
m
M
,p 10___. _
lt f“u 1
0, iLL
1-L. ET- JN
i;4 m'llm
i I
ECSSWITCr;
pg&-jqq-.
E
t2
12’
II334
%
-
rk
8
62-------____
-
q
ET
12---c.
n
G
3-
I
.---._-__60
1------.--
Q2A
10-
SELF-DIAGNOSISCXECK COKNECTOR
X35-AX-Bi?Gl-E,TSB Revision

33B-24 ELECTRONIC CONTROL SUSPENSION (ECS) - Circuit Diagram
FRONT SHOCK ABSORBERtLH)
,I
/I
‘1 JoI I_III/ /
w
L&J 110 ‘9 -----------------...-------------.-*\
+d
.& 21’f5Ys’v
a c
& CL
,I3 4
--- --
i fj ycc/ !2
6
I7--- ---
qI
I$
L5-g
i-5
v2
j,t
k
1
,,3/\
:I
b-
4
3!s”v
IELECTRONICICONTROL,SUSPENSIONICONTROL UNIT\
IL
5”5Y
l-3 5z-3
5”
pl Q
gfz’i TG
4 r-4
q; yGNEI
-y;“-~,-~--~~~-------------~~~-~~~~l 1 ;5r
I
114 ii0 !!d! ‘i L:c!Y! >1
;I5jA, KlqqELII iFFR!
;‘-1112’;;/;::;
m/rfGiz&j
’
I- iiIA/ &
I’7 j
1-ii-1234563456
&L-*4-- ,3
&,I ,r!,;>,I5 !, 3
‘ii
\n;, L
[-- (--f--!y[ w/
I,\ I* A
tkii j?n
&--~:;--A, ___;“PC *,a-.C”p :7 iti/I iy~
! j-J-A,& ‘1 ! i
j;&ONd ON q jj :[
;#-rTi,A-/!j/ I1II‘I
/ i:
III-1WJ SHXKs$flp SHOCK\m m
c’oc
I2m
I
105=3
r---------’
LB\ \,‘_+3a1‘k,
! 1”
pi..+ _ 13
II
m
L23
’
5---4-/4--
i qff dii
pR!izaq
! “f’ /!I
FRONT SHOCK ABSORBERCRH)
cj
--- --i$, &
3 y1
Lb--KX35-AX-Rl701A-NM
TSB Revision

35-18SERVICE BRAKES -Anti-lock Braking System Troubleshooting
CABS warning light does not illuminate when the ignition key is in the “START” position.
[Explanation]
LJThe ABS ECU uses the
IG2 power source which is
turned off in the “START” position. The ABS
warning light uses the
IG, power source which is
not turned off even in the “START” position.
Consequently, in the “START” position, power is offand the ECU turns the valve relay OFF. If the
warning light does not illuminate at this time, there
is trouble in the warning light circuit on the valve
relay side.
J’B 6
[15
Pi9
I58
:127r',L
ALI
Y-3>
B -
::9
IG-R l,,l G-6
7
COMBINATION
METER
.- ------ ---_-__1
‘$2 1274
7
sE,
85
ON(IGl)
1
;ABS
ECU
H
(--)With the ignition key in the
indicate the battery voltage?
Yes
Yes
I
Yes*Replace valve relay.
HU harness malfunction
NOTEWhen performing the check marked *, note polarity of the diode
(refer to the circuit diagram).
vision

35-36\
SERVICE BRAKES -‘\Anti-lock Braking System Troubleshooting
CABS warning light does not illuminate when the ignition key is in the “START” position.
[Explanation]
The ABS ECU uses the
IG2 power source which is
turned off in the “START” position. The ABS
warning light uses the
IG, power source which is
not turned off even in the “START” position.
Consequently, in the “START” position, power is off
LJand the ECU turns the valve relay OFF. If the
warning light does not illuminate at this time, there
is trouble in the warning light circuit on the valve
relay side.
EfiE-
9B
wIGNSW1--
J/BF
COMBINATIONMETER
G-R 11 G-
IN;IGl)
ITSB IRemove the hydraulic
unit (HU) connector andcheck.
Yes
c-No -Is there continuity between-> Broken line between HUbody connector terminal No. 9
and body ground
and ground?
-No 7Is there continuity between> Valve relay malfunction orHU connector terminal No. 8
break in HU harness wire
and terminal No. 9?
YesYes
&
Replace valve relay.I
1
HU harness malfunctionj Replace HU.
NOTEWhen performing the check marked *, note polarity of the diode
(refer to the circuit diagram).
visionI