1989 MITSUBISHI GALANT Service Repair Manual

AUTOMATIC TRANSAXLE - Troubleshooting23-31
CodeNo.propriate transaxl
,WD FWC
Output pattern Description Remedy
Damaged or disconnected wir-
ing of the ignition pulse pick-up
cable l Check the ignition
puke sig-
nal line.
Short circuit of the accelerator
l Check the accelerator switch
switch or improper adjustment connector.
l Check the accelerator switch
itself.
l Adjust the accelerator switch.
Damaged or disconnected wir-
ing of the pulse generator A
+
l Check the pulse generator
(AWD) A and pulse
generator
B themselves.
l Check the vehicle speed reed
switch (for chattering).
Damaged or disconnected wir-
ing of the pulse generator
B
tDamaged or disconnected wir-
ing of the shift control solenoid
valve A l Check the solenoid valve con-
nector.
l Check shift control solenoid
valve A itself.
Short circuit of the shift control
solenoid valve A
Damaged or disconnected wir-
ing of the shift control solenoid
valve
B
l Check the solenoid valve con- nector.
-L
l Check shift control solenoidvalve B itself.
Short circuit of the shift control
solenoid valve
B
i
Damaged or disconnected wir-
ing of the pressure control solenoid valvel Check the solenoid valve con-
nector.
l Check the pressure control
solenoid valve itself.
Short circuit of the pressure
control solenoid valve
Damaged or disconnected wir-
ing of the torque converter
clutch control solenoid
0 Check the solenoid valve con-nector.0 Check the torque converter clutch control solenoid itself.
Short circuit of the torque con-
verter clutch control solenord
Malfunction of the torque con-
verter clutch system l Check the torque COnVefter
clutch hydraulic pressure
system.
0 0
0 0
0
-
0 0
0 0
0 00 00 0
0 0 0 0
0 0
0 00 0
23
24
31
32
41
n
uuuul
UUUI n
42
nn
43
uum
44 45
uum
46 47
48
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l Check the torque
Converter
clutch control solenoid itself.
l Replace the control Unit.
49

23-32AUTOMATIC TRANSAXLE
- Troubleshooting
Jipproprrate transaxCode
No.Output pattern Description
Remedy
51First gear non-synchronous
uuuul n
52Second gear non-synchronous l Check the pulse generator A
and pulse generator
B con-
nectors
l Check pulse generator A and pulse generator
B them-
selves.
l Rear clutch slippage.
l Check the pulse generator A and pulse generator
B(AWD only) connectors.
l Check pulse generator A and pulse generator
B (AWD
only) themselves.
l Rear clutch slippage (AWD
only).
l Kickdown
brake slippage.
l Check the pulse generator A and pulse generator
B con-
nectors.
l Check the pulse generator A and pulse generator
B them-
selves.
l Front clutch slippage. l Rear clutch slippage.
l Check the pulse generator A and pulse generator
B(AWD only) connectors.
l Check pulse generator A and pulse generator
B (AWD
only) themselves.
l End clutch slippage (AWD only).
l Kickdown
brake slippage.
-
l TCM power supply inspection
l TCM ground inspection
l TCM replacement
AWC‘WC
0
0 0
0
0
UUUUJ-u-l-
53Third gear non-synchronous
0
0
UUUUuwL
54Iourth gear non-synchronous
0
i
Vormal
10 change as a constantoutput (or OV)Iefective transaxle control
nodule (TCM)
0
Fail Safe
Item for
1989 and 1990 model
ri Description
Output pattern (for voltmeter) Fail-safeNote
(relation to
fault code)
Code
No.
Malfunction of the
microprocessor3rd gear hold When code No. 31 is
generated 4th
time.
First gear command
during high speed
driving
3rd gear(D) or 2ndgear (2, L) hold When code No. 32 is
generated 4th
time.
n nnn
Damaged or discon-netted wiring of the
pulse generator Bsystem
3rd gear(D) or 2ndgear (2. L) hold When code No. 33 is
generated 4th
time.
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AUTOMATIC TRANSAXLE - Troubleshooting23-33
15
16
17
Output code
Output pattern (for voltmeter) Description
Damaged or discon-
nected
wiring, or
short circuit, of shift
control solenoid valve
A
Damaged or discon-
nected wiring, or
short circuit, of shift
control solenoid valve
B
Damaged or discon-
nected wiring, or
short circuit, of the
pressure control sole-
noid valve
Shift steps
non-synchronous
TFail-safe 3rd
gear hold 3rd gear hold
3rd gear(D) or 2ndgear (2, L) hold
3rd gear(D) or 2ndJear (2, L) hold
Note
(relation to
fault code)
When code No.
41 or
42 is generated 4th
time.
When code No. 43 or
44 is gnerated 4th
time.
When code No.45
or
46 is generated 4th
time.
flhen either codeNo. 51,52 53 or 54 isgenerated 4th
time.
Fail Safe
Item for 1990.5, 1991, 1992 and 1993 modelI
pproprlate transaxle Code Output patternNote
Description Fail-safe
(relation to
IWD FWD No.fault code)
81Damaged or disconnected wir- 3rd
gear(D) or 2nd31
0 -ing of the pulse generator A
gear (2, L) hold
82Damaged or disconnected wir- 3rd
gear (D) or 2nd32
0 0;ng of the pulse generator Bgear (2, L) hold
83Damaged or disconnected wir-
3rd
gear hold 41.42
0 0
ming, or short circuit, of shaftcontrol solenoid valve A
84Damaged or disconnected wir- 3rd
gear hold43,44
0 0m
ing, or short circuit, of shift
control solenoid valve B
85
Damaged or disconnected wir- 3rd
gear(D) or 2nd
45.46
0 0ming, or short crrcurt, of tne
gear (2. L) hold
pressure control solenord
valve
0 0 Shift
steps
non-synchronous 3rd
gear
(D) or 2nd51,52,53.gear (2, L) hold
54
No change as a constant Defective transaxle control Fixed for 3rd
-
0 0 -output (or OV)module (TCM)
speed
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23-34AUTOMATIC TRANSAXLE - Troubleshooting
CHECKING THE CONTROL SYSTEM (WHEN
A SCAN TOOL IS USED) FOR 1989 AND 1990
MODEL
Pulse generator Al Service datal Item No. 1’9
Throttle positron sensorTPS)m Service dataD Item No. 21
I!(
(44
c44
I!.,
I(,
\,4
:44 C
.
.
F.
.
A00
D range, stopprng state 0 rpml Defectrve pulse generator B or harness
D range, 3rd speed, driving at 50 km/h (31 mph) 1.600-2.000
rpm*Defective shield cable of pulse gene-
rator B
D range, 4th speed, drivrng at 50 km/h (31 mph) 1.600-2.000
rpml External noise invasion
D range. 2nd speed, driving at 30 km/h (19 mph) 0 rpml Defective pulse generator A or harness
D range, 3rd speed, driving at 50 km/h (31 mph) 1.400-1.800
rpml Defective shield cable of pulse gene-rator A
D range, 4th speed, drivrng at 50 km/h (31 mph) 0 rpml External noise Invasion *Slip
of kick-down brake
Accelerator is fully closed. 0.5-0.6V
l If voltage is high at the full opening or
Slowly press In the accelerator pedal.Variatron of
closing, TPS is adjusted improperly.
opening degreeelf no variation is observed, TPS or
circuit harness is defective.
Accelerator is fully opened.
4.5-5.ovelf it does not vary smoothly, TPS or
accelerator cable is defective. Xl temperature sensor
) Servtce data) Item No. 24
When engtne is cold (before starting)
Equivalent toatmospheric
temperature *Oil
temperature sensor or circuit har-ness is defective.
cickdown servo switch) Servrce data1 Item No. 25
Durrng engine warming-up driving
After engine is warmed up
L range. idling
D range, 1st or 3rd speed
D range, 2nd or 4th speed
It gradually rises.
80- 110°C(176”F-230°F)
ON *Kick-down servo IS adjusted improper-
ONIV.l Kickdown servo switch or circuit har-
OFFness is defective.l Defectivekick-down
servo
bItem No.34 alposition switch or circuitharness is defective.*Manual
control cable is defective.
Iverdnve switch1 Servrce data1 item No. 35
‘owedeconomy swatch‘Servrce data
Item No. 36 Shift to
L range
Turn on the overdrive switch.
Turn off the overdrive switch.
Select the power pattern. (Including
E pattern control at the low oil tem-perature)
L
OD
OD-OFF
Power moverdrive switch or circuit harness is
defective.
*Power/economy switch or circuit har-ness is defective.
Select the economy pattern.
Economy
.ir conditioning relay signalService dataD range. air conditioning, idling-up stateONl Harness of circuit which detects the air
Item No.37D range, air conditioning, switch-off stateOFFconditioning power relay ON signal isdefective.
Inspectron ttemInspectron content
Inspection conditionPossible cause (or remedy)
Criterion value for the abnormalrty
Pulse generator Bl Service datal Item No. 13
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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
1 TSB Revision

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.
TSB Revision

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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