engine MITSUBISHI GALANT 1989 Service Repair Manual

23-40AUTOMATIC TRANSAXLE - Troubleshooting
1990.5 Model (Vehicles with DOHC Engine)
P range
100I
80r;;
'60I,"'E
2.I0
40 a
z
5g20I
I2+.3(2.L) 3 q- 403)
Idle
I1,000
2,0003,000 4,000 5,0006,0007,000
Transfer drive gearrpm
11I III I11 III111II II I0
;6;(:i) (::)(;:)(::) (:;)(ii)
go
(1:) (56
)
loo110
120130140150160 170 180 190
(0)
(62)(68)(75) (81) (87) (93)(99) (106) (113)(118)
Vehicle speed km/h
(mph)
TFA0397
E range
100I 1l-I2(D.2)
III3 ~401)I
80r/I/I/III
g 6
0
I/1I
p "J~2&-+--+-3&i1I0Ia,I5
g 202*=3(2.L) 3-l
5I
I
Idle
II1,00

0
2,000
3,000 4,000 5,0006,000
14tD3)
TransferdrivegearrpmIIt1III1IIIIIII
010203040506070 8090
100110120130 140 150
160
(0) (6) (12) (19) (24) (31) (37) (43) (49) (56) (62) (68) 175) (81) (87) (93) (99)
Vehicle speed km/h (mph)
TFA0398
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AUTOMATIC TRANSAXLE - Troubleshootina23-41
1991 and 1992 Model (Vehicles with DOHC Engine)
P range
I
2"t3 (2.L) 39-4 03)
Transfer drive gear rpmI(:I2;(:;I(:;,(i:)(35:)(36;)(ii)(t:,(56) so(62) 100(68) 110(75) 120(81) 130(87) 140(93, 150(99) 160(106) 170(111) 180(118) 190
Vehicle speed km/h (mph)
TFA0488
E range
1 oo-IIIIIII !II II
II-

-
80I
Id-2 03.2)i'id 3 (D)
I I
g4 (DAI II‘I II-zIa-l
607 ’I
P,1
!/I1
E
:40alzII75L2&13 (2.L) 34(D3)=I20I
II
IIIdle1,0002,0003,0004,0005,0006,000
Transfer drive gear rpm
so loo
110
120 130 140 150 160 170
(i, (69 (:;) (7:) (;:) (%, (i;, & (% (56) (62) (68) (75)(81) (87) (93) (99) (106)
Vehicle speed km/h (mph)
TFA0489
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23-42AUTOMATIC TRANSAXLE - Troubleshooting
1991 and 1992 Model (AWD Vehicles with DOHC Engine)
P range
T$-P
.-58a,35
5
100
8060
40 20 Idle
1e- 2 (0.2)
1,000
2.000
3.000
4,000 5,000 6,000
Transfer drive gear rpm
IIIIIII1IIIIII
(i,
80 SO 100 110 120 130 140 150 160;; 1::) (:i, (:!, (& (% 6:) (49) (56) (62) (68) (75) (81) (87) (93) (99)
TFAO093
E range
I III
I II
1 11 2&3'iD)i 13+4iDJt 1
Transfer drive gear
rpmIIII -I 1IIIII
I
i,
so loo 110 120 130 140 150 160;; (:;, (?:, (;:, (::I i?, 6% (::I (56) (62) (68) (75) (81) (87) (93) (99)
Vehicle speed km/h (mph)T FA0094
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AlJTCMVlATlC TRANSAXLE - Troubleshooting23-45
3. Throttle-position sensor
UPS)
Damaged or discon-netted wiring
TPS terminal
SOHC Engine (1989 model)(3.5-6.5 kQ/20”C
(68°F)1I
SOHC Engine
(From 1990 model)
DOHC Engine
TFA0033 1. power
2. outpur.,
terminals 2 and 3 (SOHC Engine
1989 model) 4 and 2 (SOHC
Engine
_._ From 1990 model,
DOHC Engine) with the engine
idling after throttle-valve open-
ina warm-up.
Resistance: approx. 0.4
kQZ20”C
(,6,, , )
3. closed throttle position switch
W’D)4. ground \
Check for changes of the resist-
ance between terminals 2 and 3
(SOHC Engine
,._ 1989 model) 4
and 2 (SOHC Engine From
1990 model, DOHC Engine)
when the throttle valve is oper-
ated from the idling position to
the fully open position.
I
Changes of the resistance con-
tinuous and smooth.
Normal
4. Pulse generator
AorB
Check the resistance between
terminals 1 and 2 or 3 and 4.
Pulse generator terminals.
215-275
Q/20% (68°F)I
1-2: pulse
generator A3-4: pulse
generator B
4
Normal1
1750338 Improper adjustment
I
I
Readjust the TPS in-stallation.
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I
Replace the pulsegenerator.I

23-46AUTOMATIC TRANSAXLE - Troubleshootincl
5. Pulse generatorA or B (checking
by an oscillo-
scope)K
Connect the pulse generator and
body harness, and connect an
oscilloscope. Check with the
chassis on a dynamo or with the
front wheels raised.
Oscilloscope waveform
FWD
/VT
Noise
/Ah --L
Ar
IP
-iE
171091 AWD
AA
Noise
W
ith the selector lever at the “L”
position and the engine running at
1,000 rpm, check the voltage
waveform between terminals 1
and 2.
1
W
ith the selector lever at the
“L”position and the engine running at
1,000 rpm, check the voltage
waveform between terminals 3
and 4.
Noise
A
(6
171092+
Normal incorrect installation of
the pulse generator, or malfunction of the pulse
generator. 4
Correct the installation
condition, or replace the
pulse generator.
Replace the pulse
generator.
Incorrect installation of
the pulse generator, or
malfunction of the pulse
generator. 4
Correct the installation
condition, or replace the
pulse generator.r
Replace the pulse
generator.
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23-48AUTOMATIC TRANSAXLE
- Troubleshooting
1 press the foot, brake firmly.1W
ith the engine
idliqg, de-
Let the engine continue idling.
3
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4;ry;pn”g’ y stment 1
+
Readjust the ,idling.
1 ~i$.;h~,~~~e clutch 1

23-52AUTOMATIC TRANSAXLE - Troubleshooting
OIL PRESSURE TESTS
1. Completely
warm
up the
transaxle.
2.Raise the
vehicle
by
using
a jack so that the
drive
wheels
can be
rotated.
3.
Connect
an engine
tachometer
and place it
in a positron
where it’s easy
to
see.
4. Attach
the
special oil-pressure
gauge (MD998330-01)
and
the
adaptor
(MD998332-01) to
each oil-pressure
outlet
port. When
the
reverse position pressure is to
be tested,
the

3,000 kPa (400 psi) type
of gauge should be
used.
I AWUII/I
brake pressure
zT?ziw@
Klckdown
brake
pressure (Release)
5. Measure
the
oil pressure
under
various
conditions
, and check

to be sure that the
measured
results
are within the
standard
value
range shown
in the
“Standard
oil pressure
table”
below.
If the

oil pressure
is not
within the
specified
range, check
and repair
as described
in the
section
“Remedial
steps
if oil
pressure

is not
normal”
on the next
page.
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AUTOMATIC TRANSAXLE - Troubleshooting23-53
STANDARD OIL PRESSURE TABLE
KM175,
F4A22
. . .
Up to MODEL 1990
ConditionsStandard oil pressure kPa (psi)
N
O.1p -,-,..,-,,-_1Engine1Ch;J+1-0.1,,._,?...-1F%tclutch1E;;;;;;h1Lov$rse1To;;er13eleLL IfsYCIpositionspeedrpm
cl,1111positionneaucrng
pressurehlCI(aOWrIbrake
pressurepressure )Ipressure pressure
1NldlrngNeutral--*
2DIdling2nd gear 100-210
(14-30)
-
3(SWDON,Approx.830-900 830-900
400-600
--2,5004th gear
(118-128)
(118-128) (56-84)
(SWZFFI
Approx.3rd gear370-490830-900830-900 830-900
400-600-42.500
(52-70) (118-128)
(118-128)
(118-128)
(56-84)
52Approx.
2,5002nd gear370-490830-900 400-600-
(52-70) (118-128)
- (56-84)
-*6LApprox.1st gear370-4901,000
(52-70)-;g:gp
7R
A;pp56od(.
Approx.
1,000
Reverse370-490
(52-70) 1.640-2.240
1.640-2.240
(233-318)(233-318)--1.000 (142)1.OOO (I 42)or more
or moreF4A22
. . .From Model, 1990.5
ConditionsStandard 011 pressure kPa (Psi)
[email protected]“__l__^:__KrlrA,vrrnFrontEnd clutch
Low-reverseTorque-Select leve
brakeconverter
position pressure
‘ressurep-“cxm”1~ ,pressure
pressure
:rspeedcl,,,i;ne”“l;lily wmposition
pressureII
I I360-4801NIdlingNeutral(51~6P’2,--*--
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171 DIdling2nd gear360-4f (51-6b,
, \I
30?y;I;;p-*->i
30-900830-900450-650-1n-17RI- (118-128)(64-92)A2pPg4th gear360-480I I,.lY”-“Iv,(51-681
830-9004(SWZFF)A2pWg.3rdgear
(118-128)
,- .~,,,,“~.--,~.-lL”l,E%830-900-fllR-l='4g::;p
I I52
II
A2pg;.2nd gear~~~~~~p830-900-(118-128)-$g:;p
300-450
-*--”LApP&y.1stgear
(43-63)
1
ICI I
1 EEi2840 / _ 1 ‘~o~$~ ) 4iiIi;p7RReverse360-480
(51-68)
-1.000 (142)or more
NOTEmust be 10 kPa (I .4 psi) or less.
SW-ON: Switch ON the overdrive control switch SW-OFF: Switch OFF the overdrive control switch
*: Hydraulic pressure is generated, but not the standard value

AUTOMATIC TRANSAXLE - Troubleshooting23-59
ring
brake
CONVERTER STALL TEST
Stall test consist of determining maximum engine
speed obtained at full throttle in “D” and “R”
positions. This test checks torque converter stator
overrunning clutch operation, and holding ability of
transaxle clutches and low-reserve brake.
Caution
During this test, make sure that no one stand in
front of or behind vehicle.
1. Check transaxle fluid level. Fluid should be at
normal operating temperature [70-80°C (160-
18O”F)j. Engine coolant should also be at normal
operating temperature
[80-90°C (180-19O”F)l.
2. Apply chocks to both rear wheels.
3. Attach engine tachometer.
4. Apply parking and service brakes fully.
5. Start engine.
6. With selector lever in “D” position, depress
accelerator pedal fully to read engine maximum
rpm. Do not hold throttle wide open any longer
than is necessary to obtain maximum engine
rpm reading, and never longer than 5 seconds at
a time. If more than one stall test is required,
operate engine at approximatey 1,000 rpm in
TRANSAXLE CONTROL
neutral for 2 minutes to cool transaxle fluid
between tests.
Stall speed: 1,800-3,200
rpm
7.Place selector lever to “R” position and perform
stall test by the same procedure as in foregoing
item.
Stall Speed Above Specification in “D”
If stall speed is higher than specification, rear clutch
or overrunning clutch of transaxle is slipping. In this
case, perform hydraulic test to locate cause of
slippage.
Stall Speed Above Specification in “I?”
If stall speed is higher than specification, front
clutch of transaxle or low-reverse brake is slipping. In this case, perform hydraulic test to locate cause
of slippage.
Stall Speed Below Specification in “D” and “R”
If stall speed is lower than specification, insufficient
engine output or faulty torque converter is sus-
pected. Check for engine misfiring, ignition timing,
valve clearance etc. If these are good, torque
converter is faulty. Svmotom
Probable cause
Remedy
Selector lever operation is Incorrect adjustment of sleeve
1 Adjust
stiff
Starter motor does not oper-
Incorrect adjustment of control cable
Excessive wear of detent plate
Worn contact surfaces of pushbutton and sleeve
Malfunction in park/neutral position switch Replace
Replace
ate with the selector lever in
the
“N” or “P” position Malfunction of starter relayI
Incorrect adjustment of control cable
AdjustI
W
ill not shift to 4-speed
( Malfunction of OD switch) ReplaceI
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AUTOMATIC TRANSAXLE - Service Adjustment Procedures23-83
I:
I’
4989 models>
09A0140
6% Button pressed (while brakepedal is depressed)
c Button not pressed
0 Button pressed
SELECTOR LEVER OPERATION CHECKM23flAE
1. Shift selector lever to each range and check that lever
moves smoothly and is controled. Check that position
indicator is correct.
2.Check to be sure the selector lever can be shifted to each
position (by button operation as shown in the illustration).
3. Start the engine and check if the vehicle moves forward
when the selector lever is shifted from N to D, and moves
backward when shifted to R.
4. When the shift lever malfunctions, adjust control cable and selector lever sleeve. Check for worn shift lever
assembly sliding parts.
NOTE
To move the selector lever from the “P” position to any
other position, first turn the ignition key to any position
other than “LOCK (OFF)” and depress the brake pedal.

KEY INTERLOCK MECHANISM CHECKM23FUAA
Completely stop the vehicle and switch OFF the engine before
making the check.
1.Check to be sure that, under the following conditions, the
selector lever cannot be moved from the “P” position to
any other position.
Also check, at the same time, that the button cannot be
pressed.
Ignition key position:“LOCK (OFF)“, or removed
Brake pedal: Depressed
2.Check to be sure that, under the following conditions, the selector lever can be moved from the “P” position to any
other position.
Press the button a few times and check to be sure that the
selector lever moves smoothly.
Ignition key position: “ACC”
Brake pedal : Depressed
Button: Pressed
3.Check to be sure that, at all positions of the selector lever
(other than “P”), the ignition key cannot be turned to the
“LOCK (OFF)” position.
Check to be sure that the ignition key smoothly turns to the
“LOCK (OFF)” position when the selector lever is then set
to the “P” position and the button is released.
If a malfunction is discovered when following the above
checking procedures,either adjust or check the key
interlock cable mechanism. (Refer to
P.23-97.)
-I
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