sensor MITSUBISHI GALANT 1989 Service Repair Manual

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
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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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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

23-80AUTOMATIC TRANSAXLE - Troubleshooting
E.L.C. 4-SPEED AUTOMATIC TRANSAXLE CONTROL COMPONENT LAYOUT,
NameSymbol Name
Data link connector
FPulse generator A
4 A/T control module
HPulse generator 6
MFI control moduleISolenoid valve
Oil temperature sensor
DThrottle position sensor
Power (PWR)/Economy
(ECO) switch
GVehicle-speed sensor
NOTEThe “Name” column is arranged in alphabetrcal order.
C and D are built into the transaxle.
Symbol
A
A
C
B
E
FWD . . . From 1993 model
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AUTOMATIC TRANSAXLE - Troubleshooting23-81
control module
Vet-kle-sbeed sensor
16AOOSl4
<1989 models>
Power
(PWR)/Economy (ECO)switch 16AO463
Power (PWR)/Economy (ECO)switch
WA0776
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23-88AUTOMATIC TRANSAXLE - Service Adjustment Procedures
8. Engage the special tool (outer) on the locking nut.
Rotating the outer cyliner clockwise and the inner cylinder
counterclockwise, unlock the locking nut and special tool
(inner).
Caution
When unlocking the lock, apply equal force to both
tools.
WD . . . Up to 1992 model -
&@~o-&q
9. Tighten the locking nut by hand until the locking nut
contacts the piston. Then, using the torque wrench, tighten
to the specified torque.
Locking nut: 25-32
Nm (18-23 ft.lbs.)
Caution
If it is rapidly tightened with the socket wrench or
torque wrench, the lock nut and adjusting rod may
rotate together.
10. Remove the special tool which fastens the piston.
Attach the plug to the outlet of the low reverse pressure.
LINE PRESSURE ADJUSTMENT
1. Drain out the automatic transaxle fluid.
2. Remove the oil pan.
3. Remove the oil filter.
4. Remove the oil-temperature sensor.
J
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AUTOMATIC TRANSAXLE - Service Adjustment Procedures23-89
4WD . . . Up to 1992 model
Oilerature sensor
FWD . . . From MODEL 1990.5
5. Remove the solenoid valve connector holding clip, andpress in the connector.
6.Press the tabs of the solenoid valve harness grommet, and
then push into the case and remove.

AUTOMATIC TRANSAXLE -Service Adjustment Procedures23-91
15. Tighten valve body assembly mounting.
Valve body assembly mounting bolts:11 Nm (8.0 ftlbs.)
A: 18 mm (.709
in.) long
B: 25 mm (.984
in.) long
C: 40 mm (1.575 in.) long
Caution (AWD)
Fix the solenoid valve and oil temperature sensor harness
securely in the position shown. Since the harness of the
pressure control solenoid valve (PCSV) is separately
provided from the other harness, route the former
harness as illustrated and clamp it. If clamping is
forgotten, it will come into contact with the detent plate and parking rod.
16. Install the oil filter.
17. Install a new oil pan gasket and oil pan.
18. Pour in the specified amount of Automatic transaxle fluid.
19. Make the oil pressure test. Readjust if necessary.
REDUCING PRESSURE ADJUSTMENTMZ3FTAb
(If the scan tool is not available)
1. Remove parts up to the oil filter in the same way as for
adjustment of the line pressure. The valve body need not
be removed.
2. Turn the adjustment screw of the lower valve body and
adjust so that the reducing pressure is the standard value.
When the adjustment screw is turned to the right, the
reducing pressure becomes lower; when it is turned to the
left, it becomes higher.

23-92AUTOMATIC TRANSAXLE - Service Adjustment Procedures
NOTE
When adjusting the reducing pressure, aim for the center
value (425 kPa, 60 psi) of the standard value allowance.
Standard value: 415-435
kPa (59-62 psi)
Oil pressure change for each turn of adjustment screw: 22
kPa (3.1 psi) . . . FWD (Up to MODEL 1990)
45
kPa (6.4 psi) . . . FWD (From MODEL 1990.5, AWD)
3. Install the oil filter and oil pan in the same way as for adjustment of the line pressure.
4. Make the oil pressure test. Readjust if necessary.
(If the scan tool is used)
1. Using the scan tool, forcibly drive the pressure control
solenoid valve at 50% duty, and measure the kick-down
brake apply pressure.
If the kick-down brake apply pressure does not exist within
the standard value width, adjust the pressure with the
reducing pressure adjustment screw.
Standard value: 275 + 10 kPa (39 + 1 psi)
Oil pressure change for each turn of adjustment screw:
25 kPa (3.6 psi) FWD (Up to MODEL 1990)
22
kPa (3.1 psi) FWD (From MODEL 1990.5), AWD
2. Check to be sure that the reducing pressure (after the
adjustment is completed) is within the range of 360-480
kPa (51 -68 psi.).
Caution
This adjustment should be made at an oil
temperature
of 70- 80°C
(160- 180°F).
If the adjustment is made at a temperature that is too
high, the line pressure will drop during idling, with the
result that it might not be possible to make the correct
adjustment.
I / Oii
seal09K561
THROTTLE-POSITION SENSOR ADJUSTMEF&
Refer to GROUP 13-On-Vehicle Inspection of MFI Compo-
nents.
DRIVE SHAFT OIL SEALS REPLACEMENT MZ3FDBC
(1) Disconnect the drive shaft from the transaxle. (Refer to GROUP 26-Drive
Shaft.)
(2) Using a flat-tip
(-) screwdriver, remove the oil seal.
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