MITSUBISHI GALANT 1989 Service Repair Manual

AUTOMATIC TRANSAXLE - Troubleshooting23-35
l TPS system isdefective.
ilpressure
is improper.verter clutch (TCC) solenoid
B Service datam Item No.49
CHECKING THE CONTROL SYSTEM (WHEN A SCAN TOOL IS USED) FOR 1990.5, 199\
1, 1992
AND 1993 MODEL
Inspection item
;;;yle posrtion sensor *Data
list
l Item No. 11
Oil temperature sensor *Data
list
0 Item No. 15
Krck-down servo switch
*Data list
*Item No 21
‘gnition signalInjectron signal) ,Data
list
D Item No. 23
iccelerator pedal switchexcept 1993 models)~Data listbItem No.24
Qr conditioning relay signalrData list rltem
No.26
Transaxle gear position~Data listm Item No. 27
-rInspection content
Inspection condition
Accelerator is
fullv closed.
LSlowly press in the accelerator pedal.
1 Possible cause (or remedy)for the abnormality
l If voltage is high at the full opening 01closing, TPS IS adjusted improperlv.elf no variation is observed. TPS 01
Accelerator IS fully opened.
--circuit harness ic r(afndi
O,a “ClrULIIu.
4.5-5.ov*If it does not vary smoothly. TPS OII- .-d-L__.:__accelerator cable IS oerectrve.
When engine is cold (before starting)
Equivalent to*Oil temperature sensor or circuit barbarometricness is defective.
During engine warming-up driving
After engine is warmed uptemperature
It gradually rises.
80- 110°C(176”F-230°F)
L range, idling
D range. 1st or 3rd speed
D range, 2nd or 4th speed
ON
ON
OFFl Kick-down servo IS adjusted improperIv.l Krckdown servo switch or circurt barness IS defective.
*Defective kick-down servo
N range, idling
N range, 2.500 rpm (read on the tachometer)
650-900 rpm l Ignition system is defective. 2.400-2.600
rpml Harness of ignition signal pick-up cir-cuit is defective.
Accelerator
IS fully closed.
Press in the accelerator pedal
sliphtlv.I
ON
OFF
l Accelerator pedal switch is adjusted
improperly. *Accelerator

oedal switch or circuit har-ness is defective.
D range, air conditioning, idling-up state
D range, air conditioning, switch-off state
ON
OFF
l Harness of circuit which detects the airconditioning power relay ON signal isdefective.
D range, idling
L range, idling
Cl TCM is defective.r A~d~r~tnr nednl +witch svstem is de-
!IST, -;,,tl;;..- r..--. -.-.--..
-,---,.,.,.,.v.l Park/Neutral position switch system isdefective.2nd ran!ge. 2nd speed
D renqe. O/D-OFF. 3rd speedl TPS system is defective.-~~~~~D range, O/D. 4th speed4TH
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23-36AUTOMATIC TRANSAXLE
- Troubleshooting
Inspectron ItemInspection content
Inspectron condrtion
Possible cause (or remedy)
1 Criterion valuefor the abnormality
Pulse generator A (FWD)D range, 2nd speed, drivrng at 30 km/h (19 mph)
0 rpml Defective pulse generator A or harness*Data
list *Defective shield cable of pulse gene
l item No.31D range, 3rd speed, drivrng at 50 km/h (31 mph) 1.600-2.000
rpmrafnr A
D range, 4th speed, driving at 50 km/h (31 mph)n
Pulse generator AW’J’JD) *Data
lrstl Item No. 31
D range, stopprng state 0 rpml Defective pulse generator A or harness *Defective
shield cable of pulse gene
D range, 3rd speed, drivrng at 50 km/h (31 mph) 1.800-2.200
rpmrator A
D range, 4th speed, driving at 50 km/h (31 mph) 1.200-1.600
rpml External noise rnvasronl Slip of kickdown brake
Pulse generator Bl Data listl Item No. 32
D range, stopping state 0 rpml Defective pulse generator B or harness
D range, 3rd speed, driving at 50 km/h (31 mph) 1.600-2.200
rpm *Defective
shield cable of pulse generator B
D ranoe. 4th soeed. drivina at 50 km/h (31 mph) 1.600-2.200
mml External noise invasron
Overdrive switch *Data
list
*Item No.35
Turn on the overdrive switch.
Turn off the overdrive switch.OD
OD-OFF
moverdrive switch or circuit harness isdefective. Power/economy switch
*Data list
l item No.36
Select the power pattern.
(Including economy pattern control at the low oil
temperature) Power
l Powedeconomy switch or circuit har-ness is defective.
Park/Neutral posrtion
(PNP) switch
l Data list*Item No.37
Select the economy pattern.
Shaft to P range
Shift to
R range
Shift to
N range
Shift to
D range
Shift to 2 ranqe
Economy
Pl Park/Neutral position switch is adjusted
improperly.
Rl Park/Neutral position switch or circuil
Nharness is defective.aManual control cable is defective.Dl inspect the shift lock device when theselector lever is not moving.2
1 Shift to L ranqe
I L I
vehicle speed reed switch *Data

lrstl Item No.38
0 km/h (0 mph)
-1
l If high speed signal is output when thevehicle stops, the vehicle speed reed
switch is defective
.
*In other cases, vehicle speed reed
switch or circuit harness is defective.
=CSV dutyl Data listl item No. 45
l If accelerator pedal is pressed in evenslightly in the idling state ofD range
*Accelerator pedal switch IS defective.
rorque converter clutch slrp D range, 3rd speed 1,500 rpmamount(read on the tachometer)m Data listmltem No.47D range, 3rd speed 3,500 rpm
(read on the tachometer) 100-300
rpm
0 rpm
l Torque converter clutch
is defective.
l Ignition signal cable or pulse generatorsystem is defective.l Transaxle oil pressure is improper.l Torque converter clutch (TCC) solenoid
is defective.
rorque converterclutch D range, 3rd speed 1.500 rpm0%l TCM is defective.TCC) solenoid duty(read on the tachometer)) Data listl TPS system is defective.
Dltem No.49D range, 3rd speed 3,500 rpmVariationl Pulse generator B system is defective.
(read on the tachometer)deoendina
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AUTOMATIC TRANSAXLE - Troubleshooting23-37
ELEMENT IN USE AT EACH POSITION OF SELECTOR LEVER
NOTECl. . . . . . . . .FrontclutchC2 . . . . . . . . .Rear clutchC3 . . . . . . . . .EndclutchOWC . . . . . . One-way clutchBl
. . . . . . Kickdown brake82 .._.. Low-reverse brake
SHIFT PATTERNS
Two

shift patterns
are pm-stored
in the
control
‘unit of
this transaxle.
One is the
power
pattern
(for more powerful
performance), and
the
other
is the
economy
pattern
(for
improved

fuel consumption
and quieter
operation).
(Refer to
the

diagram below.)
The
driver
can select
and switch to the
desired
pattern
by
using
the
power/economy
select

switch on the
center
console.
The solid lines
shown
in these
shift patterns
indicate
up-shifts,
and
the
broken lines indicate. down-shifts. The reason why there

is a difference
between
the
shift points for
up-shifts
and for

down-shifts is so that up-shifts
and down-shifts will not
occur frequently
when
driving
at
a speed in the
vicinity of the
shift
point.
When the
vehicle

is stopped,
there
is a shift to -2nd gear
in order
to
obtain
a suitable
“creeping”, but
when the accelerator
pedal is
then
depressed
the
vehicle
starts
off in 1st gear.
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23-38AUTOMATIC TRANSAXLE - Troubleshooting
1989 and 1990 Model (Vehicles with SOHC Engine)
P range
Transfer drive gear rpmIIIII1III
,11III050 607080 90 100 110
120130140150 160170
(0)(31) 137) (43) (49) (56) (62) (68) (75)(81) (87) (93) (99) (106)
Vehicle speed km/h (mph)
1750457
E range
---P 9:j--lJ
I
T60
5a.G/Y!A6
Ix/ IAII I I
40.I/ I/ II/I
II8I
a,I75I/! /Tp20/ I/ I)
/. A
I I/ 1
1II
II’ II
Idle1
r( I(1+2 u2+3 (2.UI1,0002,000
3,000 4,0005,000
6,000
Transfer drive gear rpm
IIIIIIII IIIILIIII1
0:6950
60 70 80 90100 110 120 130 140150 160
170
(0)(31) 137)(43) (49) (56) (62) (68) (75)(81) (87) (93) (99) (106)
Vehicle speed km/h (mph)
1750458
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AUTOMATIC TRANSAXLE - Troubleshooting23-39
1990.5, 1991 and 1992 Model (Vehicles with SOHC Engine)
P range
Transfer drive gear rpm
1Lgo loo 110 120 130 140 150 160 170
(ii :69 (:;) (;390) (;:) (35:) (i;) (ii, (it, (56) (62) (68) (75) (81)(87) (93, (99) (106)
Vehicle speed km/h (mph) TFA0482
E range
I403)
Transfer driveaear
rpm-LII
1
ii,7;(;i,(T:,(;t)(i:,(!i(ii,(ii)(56) 90(62) loo110 (68)(75) 120130 (81)(87) 140(93) 150(99) 160(106) 170
Vehicle speed km/h (mph)VA0483
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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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AUTOMATIC TRANSAXLE - Troubleshootina
1993 model
P range
100
80
60 40
20
Idle
1-1 2 (D.2)
c
tfI* 2(L)2-13 (2,L)3--4(b)
I II I III
1,000 2,000 3,000 4,000 5,000 6,000 7,000
Transferdrive gearrpm
1
0102030 4050 60 708090100110120 130140 150160170 180 19
0
(0)(6)(12)119)(24)(31)(37)(43)
(49)(56)(62) (68)(75)(81)(87)(93)(99) (106)(111)(118)
Vehiclespeed km/h(mph)
TFA0932
E range
31
F.-c
ti
a,
5:‘5
if
100
80
-
60 Idle
I I
II
III II1
1,0002,000
3,0004,000
5,0006,000
7,000
Transferdrivegearrpm ,
III
tIIII , , , tI(00)(6) 10(12) 20 (19) 30(24) 40 (31) 50 (37) 60
(43) 70(49) 80(56) 90(62) 100(68) 110
(75) 120(81) 130(87) 140(93) 150(99)(106)(111)(118) 160 170 180 190
Vehiclespeed km/h(mph)
TFA0933
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23-44AUTOMATIC TRANSAXLE - Troubleshooting
INSPECTION OF ELECTRONIC CONTROL SYSTEM COMPONENTS1. Wiring Based on the wiring diagram,
improper connection of
check whether the continuity and connector, damaged or
disconnected harness,
grounding of each harness IS OK. or incorrect wiring con-4
nection.
cContinuity> 4
4
Reconnect the connec-
I
Normal
Itor; repair or replace the
harness.
2. Oil-temperature
sensortemperature and check theresist-ante between the terminals 1 and2 (FWD),1and2 or 2 and 3 Damaged
or disconnected
Replace the oil-
temperature sensor
FWD (1993 model)
TFA0821
AWD (Up to 1992 model) 1
1. Low temperature side
~
2. Ground
3. High temperature side
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