1989 MITSUBISHI GALANT ignition

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
TSB Revision

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
TSB Revision

23-60AUTOMATIC TRANSAXLE - Troubleshooting
CIRCUIT DIAGRAM
cl989 models>
IGNITION
- ‘\- ‘\I-/.d2 -s/R‘*A-432.‘Da-2‘-- RD* l ND N
\$\I \I $6 >’ pg $5\I
- I 1:29‘ki 62 7 3'11
AJ5gp&%dII -IIIIIII1IIIIIIIIIIIIIIIIIIIIIIIIII-*-:
;2
III
:
R fiKJ
Ill,14(B'
1I10RI
1' 2i
B1I
Y:( 6
12(YB)114(YB'
:( 6(YR):( 5(YR;1I
0 ,16(BY)I
:( 7By @
; x15
(RL)IRL @(BW)BW @(Y)Y,"I2@I I1I\ II;;; 8
L
I--+
P
-@
@-
-@-
(RG)
:: 1I(GL)
(RG) @
I
(GR) '
(GL) a
(GR)0
&iL__-..___-------------------------~~---------------$5 ‘r-----_______________510;gyg;NATIONA-092
is
@jJA2,\
rBY43
2Et?
CL7
tBACK-UP LIGHT
STARTER
MOTOR
:X35-AC-H0707-NY
1 TSB RevisionI

23-64AUTOMATIC TRANSAXLE - Troubleshooting
CIRCUIT DIAGRAM
< 1990 models>
IGNITION
WCH
I
A-09
@
RK/
,_________ -_----__----
L '/p Lo\
J ,"
-LB!f#kONp SWITCH
'*IA-43
a
il-'jR2 -o,-wdRN
Ej2'7 5 113
P
(BY)
(RL)
(BW)
(Y)
(YB)
(YR)
tI I II IBY @
I-I 1
!RL @
Bw @Y
YB $j
YR @
I
R
N
EEi
D
2
II
1 IIai
t5w ,113
Y :tS
:( 2',YB) 114:( 6(YR) J 5IIE.,12E -51I:: 1II
P4
+<
_____--_---__-------
I510COMBINATIONiMETER
;zi
mc:
4
4
L
2E3
I
ciI
t
STARTER
MOTOR BACK-UP LIGHT
X35-AC-HOTOWNY
TSB Revision

AUTOMATIC TRANSAXLE - Troubleshooting23-65
IGNITION
%wTAILRELl2
i
cl':
I =
12.94
Ec
0587810A
--_--_-_--__---_____----~2 C-43z
(q
mjC-42z'~---------;~;-----;'4g
I?
D-44I211
VE (TrrU
AUTO-CRUISECDNI’ROL-UNIT
i
(3 1,.@I III III II
I
o ;;L
----. -.3
I' BWi
t i3I"DI
@ (RG)I(GL)
g (GR) 3
2g4_-----------------------,,-__----..------
C-16
I GHT
1
WATED
-
a c-37 I234
1m5313
J/B
EI C-32
D-47
POWER/
ECONOMYCHANGE OVERSWITCH
2
I
J/B(TAIL)
I-----+
ELC4-SPEED
AUTOMATIC
TC%%kEMODULE
REMARK%MARK INDICATES THE OPTIONAL WIRlNGHARNESS FOR AUTO-CRUISE CONTROL SYSTEM.
TSB Revision

23-66AUTOMATIC TRANSAXLE - Troubleshooting
CIRCUIT DIAGRAM (CONTINUED)
< 1990 models>
C-18
AUTO COMPRESSORCONTROL UNIT
8 C-57 8 7 o ~~011s f!l!EsB
A-21@
ON:2lOOkPa(2BBPsl)OFF:2700kPa (384psl)
IGNITION POWER%
TRANSISTOR
I
ELC4-SPEED
t%iJ##Ec
MODULE
KX35-AC-H0705A-NY
pJ;o- $
fit&ROL qUNIT
ELC 4-SPEED AUTOMATICTRANSAXLE SOLENOID VALVE
JUMPERj-7,16(BrR)-
1 TSB Revision

AUTOMATIC TRANSAXLE - Troubleshooting
CIRCUIT DIAGRAM
< 1990.5 models>
IGNITION
YETFHI
IGNITION
%YCH
I
A-09 v1(i)
@j
3
4.J",,ll__-----.-----
2 LB a
0*4lx 10
i3%L
I \L-x
(BY)
(RL)
(BW)_... I
O/DII:( 2(YB) :(14(YM) I 14i6(YR) x 5 1 (YR) 1IcIYR G
_..__- ./"I
A-a,?
J.3: 1-1I1 (GL)If .TII ,Prl\
.12 6d j 1 (RG)--g
, \"K,
4R
COMBINATION.-
%
ziz.
m
BACK-UP LIGHT
35-AC-HOTlO-NY
TSB RevisionI