1990 MITSUBISHI SPYDER brake

AUTOMATIC TRANSAXLE ,
E N G I N E ( T U R B O ) A N D E N G I N E >
INSPECTION PROCEDURE 8
lShocks when shifting from to and long lag time
[Comment]When the engine is idling, abnormal shocks or a lag time of 2 seconds or more occurs when
the selector lever is shifted from to range.In such cases, the cause is probably abnormallow reverse brake or front clutch pressure, or a de fective low reverse brake or front clutch.
, When starting off
Probable cause
Abnormal front clutch pressurel Abnormal low reverse brake l Malfunction of front clutchl Malfunction of low reverse brake M a l f u n c t i o n o f v a l v e
Refer to Automatic Transaxle Overhaul
I When does the shock
When from to
pressure test, NG
(defer to Measure the front clutch pressure
in range at 2,500 Standard value:1,640 2,240
OK
Hydraulic pressure test
(Refer to
l Measure the low reverse brakepressure in range at 2,500 Standard value:1,640
NG
lRemove the transaxle, oil pan and
l Pistons should operate and
when air is blown throuah the lowreverse brake oil holes trans-axle case.I
OK
Front clutch system check Remove the transaxle, oil pan and
valve body.
Pistons should operate and pres- sure should also be maintained
when air is blown through the frontclutch oil holes in the transaxlecase.
NG
T S B R e v i s i o n Front clutch, low reverse brake check
lCheck for burning of the facing, de-
fective piston seal rings and interfer-
ence between the end plate andretainer.
Valve body disassembly, cleaning and
reassembly
of bolts, and to damage, chipping
or slippage of valve inter-
mediate plate and body.
lIf it is considered that the damageor chipping cannot be repaired, re-place the valve body assembly. OK
. .

AUTOMATIC TRANSAXLE
ENGINE (TURBO) AND ENGINE>
INSPECTION PROCEDURE 10.
l Shocks and flare shifts
[Comment]l Malfunction of servo switch
Shocks occur when driving due to upshifting or down shifting. In addition, the engine speed l
during shifting increases abnormally in comparison to normal shifting. In such cases, the cause lAbnormal reducing pressure
Malfunction of valve body
is probably abnormal reducing pressure or a defecti ve servo switch.
l Malfunction of closed throttle positron switchMalfunction of pressure control solenoid l Malfunction of clutches and brakes
SCAN
l 21 servo switchOK: Turns momentarily from ON to OFF when engineis in and the accelerator pedal is
Refer to Automatic Transaxle Overhaul
(Refer to servo adjustment (Refer to I
NG
depressed from the fully
closed position.
After completion
Closed
position switch check
l Check the closed throttle position
switch system according to inspec-tion procedures 17.
(Refer to
Valve body disassembly, cleaning andreassemblyl of bolts, and to damage, chipping
or slippage of valve inter-
mediate plate and body.
lIf it is considered that the damageor chipping cannot be repaired, re-place the valve body assembly.
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SCAN TOOL Test
l 01
lMeasure the servo brakeapplication pressure in range
while the engine is idling and the
fluid temperature is (178
Standard value:245 294 (35-42 psi)
[when PCSV DUTY is 50%)
Pressure control
valve checklCheck for sound of opera-tion in range while the
engine is idling.
lCheck to be sure that the
valve is not sticking due
to foreign materials being
clamped.lIf there is an abnormality,
replace the solenoid valve
assembly.
Clutch and brake
check
lCheck each end play, andif they exceed the stan-dard values, adjust so thatthey are within the stan-
dard values.

AUTOMATIC TRANSAXLE
ENGINE (TURBO) AND Troubleshooting
INSPECTION PROCEDURE 11
l All points (Early, late shifting points) P r o b a b l e c a u s e
[Comment]l
Malfunction of pulse generator All shift points occurs early, late while driving.
In such cases, the cause is probably a defectivelMalfunction of shift control solenoid A orpulse generator (PG-B) or shift control solenoid valve A or B).l Malfunction of lAbnormal reducing pressure or servobrake application pressure
l Malfunction of clutches and brakes
l Malfunction, of ‘valve body,
Refer to Automatic Transaxle Overhaul
OK
SCAN TOOL Data list
l 32
Pulse generator (PG-B)
OK: Increases in proportion to vehicle speed
NG
Code Nos. 32, 82 Pulse generator system
check (Refer to 27 Shift control solenoid valve A and drive signals
OK
Replace the TCM.Hydraulic pressure (Refer to l kickdown: servo brake applicationpressure in range at 2,500
StandardReducing pressure psi)
servo brake application psi).
Valve body disassembly, cleaning and
Pay particular attention to bolts, and to damage, chipping
or slippage of O-rings, valve inter-
mediate plate and body.
lIf it is that the damageor chipping cannot be repaired, place the valve body assembly.
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AUTOMATIC TRANSAXLE
ENGINE (TURBO) AND ENGINE,
INSPECTION PROCEDURE 14
Poor accelerationI
[Comment]l Malfunction of clutches and brakesWhile driving, acceleration is poor even if downshi fting is performed. In such cases, the causeMalfunction of engine system
is probably a defective clutch or brake, or a defec tive engine system.
Refer to Automatic Transaxle Overhaul
Engine system check
lCheck the control system, ignition system, fuel sys temand main engine system, and confirm that everything
is normal.
lIf there is an abnormality, repair or replace the enginesystem.
After completion
Clutch and brake check
lCheck each end play, and if they exceed the standar d
l Check for burning and wear in each facing.
INSPECTION PROCEDURE 15 ,
l VibrationProbable cause
[Comment] l Abnormal torque converter pressure
Vibration occurs when driving at constant speed or when accelerating in top range. In such l
Malfunction of engine system
cases, the cause is probably abnormal torque conver ter clutch pressure or a defective torque
Malfunction of torque converter converter. o f v a l v e b o d y
Refer to Automatic
sensor connector is disconnected?
No
Yes
Standard value: (64-92 psi)
OK
If it is considered that the damage or chipping can not
be repaired, replace the valve body assembly.
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AUTOMATIC TRANSAXLE
ENGINE (TURBO) AND ENGINE> Troubleshooting
Item
No.
27
27
28
31
32
35
37 Check item
Shift control
solenoid valve A
(SCSV-A) drive
signal and shift
control solenoid
valve
(SCSV-B)
drive signal
Shift control
solenoid valve A
(SCSV-A) drive
signal and shift
control solenoid
(SCSV-B)
drive signal
Ignition switch: ON
Stopped
Selector lever position:
range
Overdrive: OFF
Selector lever position:
range
Overdrive: ON
Brake pedal position
light switch
Check conditionsNormal condition
Fully closed
Accelerator pedal position
Engine: Idling (vehicle
stopped)
lever position:
range Depressed slightly
Selector lever position:
range Idling (vehicle stopped)1
Idling (vehicle stopped)I
Selector lever position:
2 range Driving at 10 mph)1
Driving at constant speed of
40 seconds2or more)
Released
Driving at 5 km/h (3.1 mph)
Driving at constant speed of
50 mph) (20 seconds3
or more)
Driving at constant speed of
50 mph) (20 seconds4
or more)
Depressed ,
OFF
Selector lever position:
Driving at constant speed of
range 50 (20 seconds rpm
generator AOverdrive: OFFor more)
PG-A)
Selector lever position:Driving at constant speed of range 50 mph) (20 seconds ,500 rpm
Overdrive: ON
or more)
Selector lever position:Driving at constant speed of range 50 mph) (20 seconds rpm
generator Overdrive: OFFor more)
Selector lever position:Driving at constant speed of range50 mph) (20 seconds rpm
Overdrive: ONo r m o r e )
Ignition switch: ON Overdrive switch: ONOD switchEngine: Stopped
Overdrive switch: OFFOD-OFF
Selector lever: range
Selector lever: range
‘ark/NeutralIgnition switch: ON Selector lever: range
osition switchEngine: Stopped Selector lever: range
Selector lever: 2 range2
Selector lever: range
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AUTOMATIC TRANSAXLE
ENGINE (TURBO) AND ENGINE> Troubleshooting
Item
No. Check itemCheck conditions
Normal
Idling (vehicle stopped)
Driving at 10 mph)Selector lever position:
2 range
Vehicle speedDriving at constant speed of
38 40 km/h (25 mph) (20 seconds40 km/hsensoro r m o r e )
Selector lever position:Driving at constant speed of range50 (31 mph) (20 seconds50Overdrive: OFF
or more)
Accelerator pedal position
Pressure control Engine: Idling (vehicle
45solenoid valvestopped)
Selector lever position: Depress slightly
range[Driving at 5 (3.1. mph)]
47
49
Torque converter
clutch solenoid
Amount of torque
converter clutch
slippage
Torque converter
clutch solenoid
duty Selector lever position:
range
Overdrive: OFF
Selector lever position:
range
Overdrive: OFF
Driving at constant speed of
50 km/h (31 mph) (20 seconds rpmor more)
Driving at constant speed of
70 km/h (43 mph)
Driving at constant speed of
50 km/h (31 mph) (20 seconds0or more)
Driving at constant speed of
70 km/h (43 mph)0
ACTUATOR TEST REFERENCE TABLE
Item No.Check item Drive contents
01Pressure controlCurrent flows to the
solenoid valve lenoid valve for 5
at 50% duty
Check conditions
Engine:
Idling (Vehicle stopped)
Selector lever:
range
Throttle opening angle: Fully closed
Normal condition
The brake
pressure is
sured and the pressure
during actuator driving is
lowered.
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AUTOMATIC TRANSAXLE
ENGINE (TURBO) AND ENGINE> Troubleshooting
No.Check item
Check conditionsNormalRemarks
16Communication withEngine: idle
ECMSelector lever: range
20Closed throttle
position switch Engine: Idling
Engine: Off idle
21
23
24
25
26
31
32
33
34
35
36
37
38
Throttle position
sensor Accelerator pedal: Fully closed
Accelerator pedal: Fully open
Oil temperature
sensor Fluid temperature:
Fluid temperature:
3.9
1.4
Sensor ground Engine: IdlingI--
Power supplyBattery positive
voltage
Ground Engine: IdlingIo v
Park/ Neutral position
Selector lever position: rangeBattery positive
switch (P) voltage
Selector lever position: Out of range 0
Park/ Neutral position
Selector lever position: rangeBattery positive
switch (R) voltage
Selector lever position: Out of
range0
Park/ Neutral position Selector lever position: rangeBattery positive
switch (N) voltageSelector lever position: Out of range 0
Park/ Neutral position
Selector lever position: rangeBattery positive
switch (D) voltage
Selector lever position: Out of
range0
Park/ Neutral position Selector lever position: 2 rangeB a t t e r y
switchvoltage
Selector lever position: Out of 2 range 0
Park/ Neutral position
Selector lever position: range positive
switch (L)voltage
Selector lever position: Out of
range0
switch Overdrive switch: ON
Overdrive switch: OFF
Battery positive
voltage
o v
Brake pedal is depressedo v--- I
light switch Brake pedal is releasedBattery positive voltage
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AUTOMATIC TRANSAXLE
ENGINE (TURBO) AND On-vehicle Service
Stall test consists of determining maximum engine speed
obtained at full throttle in positions. This test
checks torque converter overrunning clutch operation,
and holding ability of transmission clutches and
brake.
Caution
During this test, make sure no stands in front
of, or behind, vehicle.
1.Check the transmission fluid level, fluid temperatu re and
coolant temperature.
lFluid level: At “HOT” position on dipstick
l Fluid temperature:
lEngine coolant temperature:
2. Apply chocks to both rear wheels.
3.
engine tachometer.
4. Apply parking and service brakes fully.
5 . S t a r t e n g i n e .
6. With selector lever in position, depress accelerator
pedal fully to read engine
rpm. Do not hold
throttle wide open any longer than is necessary to obtain
maximum engine rpm reading, and never longer
5 seconds at a time. If more than one stall test is required,
operate at approximately 1,000 in neutral
for 2 minutes to cool transmission fluid between te sts.
Standard value:
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2,100 2,600
3 , 3 0 0 3 , 6 0 0
7.Place selector lever to position and perform test
by the same procedures above.
Stall Speed Above Specification in
If stall speed is higher than Specification, rear c lutch or overrun-
ning clutch is slipping. In this case, perform hydrau-
lic test to locate cause of slippage.
Stall Above Specification in “R”
If stall speed is higher than front clutch of trans-
axle or low-reverse brake is In this perform
hydraulic test to locate cause of slippage.
Stall Speed Above Specification and “R”
If stall speed is lower than insufficient engine
output or faulty torque converter is Check for en-
gine misfiring, ignition timing, valve clearance etc. If these
are good, torque converter is faulty..