1990 MITSUBISHI SPYDER check engine

AUTOMATIC TRANSAXLE ENGINE’
(TURBO) AND
ENGINE> T r o u b l e s h o o t i n g
Code No. 59 Anomalous vibration occurrence
[Comment]l Noise generatedIf pulse generator A output indicates the revolutio n alteration by more than 50
l Automatic transmission fluid deteriorated in a specified cycle, diagnosis code 59 is output.
l occurred
Yes there noise in the pulse generator Eliminate the source Of A output waveform?
No
Replace automatic’transmission fluid.
Check trouble symptom.
NG
Inspection procedure 15; vibration.
(Refer to
Code Torque reduction request and execution sig-
nal lines
causeCode Torque reduction request signal lines
Code
Torque reduction execution signal lines
[Comment]l Malfunction of ECMIf a “torque reduction executing” signal is detecte d for 0.2 second or more while al Malfunction of TCM
“no torque reduction request” signal is being outpu t, there is a short-circuit in the
l Malfunction of connector
torque reduction request signal line or an open cir cuit in the torque reduction executionsignal line, and code No. 61 is output.
If a “torque reduction executing” signal is not det ected four times even though 0.2
second has passed since a “torque reduction request ” signal was output, there is
an open circuit in the torque reduction request sig nal line and code No. 62 is output.
If a “torque reduction signal is not detected under the following conditi ons,there is a short-circuit in the torque reduction execution signal line and code NO.
63 is output.
The transaxle output shaft speed has been 1,000
or higher after the ignition
switch in turned on.
Engine speed has been 1,000 or higher for 20 minutes or more after the ignitio nswitch is turned on.
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Measure at ECM
lDisconnect the connector and
l
Voltage between (7) and ground
l switch.
NG
Check the l
OK
Check trouble
Repair
TCM and
u n
Replace the TCM.

AUTOMATIC TRANSAXLE
ENGINE (TURBO) AND ENGINE> Troubleshooting
INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS
INSPECTION PROCEDURE 1
l Communication with scan tool is not possibleProbable cause
l M a l f u n c t i o n o f d i a g n o s i s l i n e communication with the scan tool is not possible, the cause is probably a defective diagnosisl Malfunction of TCM power supply line or the TCM is not functioning. l
Malfunction of TCM ground circuit
l Malfunction of TCM
is communication with other systems
possible using the scan tool?
Yes
Check the diagnosis line with scan tool.Repair, if necessary.
NG
lDisconnect the connector and mea-sure at the harness side.
l Voltages between terminals
(25) and ground
OK: Battery positive voltage
l Continuity between terminal
Check the following connectors:NG Repair
l
Replace the TCM.
.
Check the following connectors;
NG Repair
l
OK
the TCM and power supply. Repair,
l Check the harness wire betweenthe TCM and ground. Repair, if nec-
INSPECTION PROCEDURE 2
l Starting impossible (will not crank)
Probable cause
[Comment]l Malfunction of engine system
Starting is not possible when the selector lever is in or range.In such cases, the cause
l
Malfunction of torque converter
is probably a defective engine system, torque conve rter or oil pump.l
Malfunction of torque converter
l Malfunction of oil pump
Refer to Automatic Transaxle Overhaul
Engine system check
l Check the control system, ignition
system, fuel system and main
thing is normal.
l If there is an repair or
replace the engine
After completion
Torque converter check l Check to be sure that the torque
converter installation is not defec-
tive (inserted at an angle, etc.).
l
If there is an abnormality, carry out
repairs. However, if the aredamaged and repairs are not pos-
sible, replace the torque converter
assembly.
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After completionOil pump check l Check to be sure that there are noabnormalities such as oil pump Sei-zure, side or loosening of l If there is an abnormality, replace
the oil pump assembly.

AUTOMATIC TRANSAXLE
ENGINE (TURBO) AND ENGINE>
INSPECTION PROCEDURE 3
l Does not move forward
[Comment] Abnormal line pressure
When the engine is idling, the does not move forward even if the lever is l
Malfunction of rear shifted from to 2 or range. In such cases, the cause is probably abnorm al line pressure,l Malfunction of one-way or a defective rear or one-way clutch.
l Malfunction of body
Refer to Automatic Transaxle Overhaul’
NG
Vehicle usually starts off but forwardmovement
sometimes becomes in or 2.
Yes
Hydraulic pressure test
(Refer to
l Check the rear clutch pressure
when shifting from to range.
S t a n d a r d
psi)
OK
Rear clutch system check lRemove the oil pan and valve body.l Pistons should operate and pres-
sure should also be maintained
when air is blown through the rear
clutch oil holes in the transaxle
case.
OK
body disassembly, cleaningand reassembly Pay particular attention to loos-
ening of bolts, and to damage,
chipping or slippage of O-rings,
valve intermediate plate andbody.lIf it is considered that the dam-age or chipping cannot be re-
paired, replace the valve body
assembly.
NG
moves forward in range.
Yes
Replace the one-way clutch.
Rear clutch check lCheck for burning of the facing,
defective piston seal rings and
interference between the end
plate and retainer.
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AUTOMATIC TRANSAXLE
ENGINE (TURBO) AND ENGINE> Troubleshooting
INSPECTION PROCEDURE 4l Does not back-up
[Comment]When the engine is idling, the vehicle does not bac k-up even if the lever is shifted
from to range. In such cases, the cause is abnormal pressure in the low reverse
brake or front clutch, or a defective low reverse b rake or front clutch.l
Abnormal low reverse brake pressurel Abnormalfront pressurel Malfunction of front l of low reverse of valve
Hydraulic pressure test
(Refer to
lMeasure the front clutch pressure
in range at Standard value: 2,240 (233-319 psi)
NG
Refer to Automatic Transaxle Overhaul
Hydraulic pressure test
(Refer to
l Measure the low reverse brakepressure in range at 2,500 Standard value: (233-319 psi) Front
lRemove the oil pan and body.l
Pistons operate and pres-
sure should also be maintained
when air is blown through the front oil holes in the c a s e .NGOK
NG. Front clutch and low reverse Low reverse brake system check
lRemove the oil pan and valvebody.l Pistons operate and
pressure should also be
maintained when air is blown
through the low reverse brake oil holes in the transaxle case.
OK
Valve body disassembly, and reassembly Pay attention to loos-
ening of bolts, and to damage,
chipping or
of O-rings, intermediate plate andbody.if it is considered that the dam-age or chipping cannot be re- paired, replace the valve body
assembly.
Probable cause
checklCheck for burning of the facing,defective piston seal rings andinterference between the end and retainer. O K
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AUTOMATIC TRANSAXLE
ENGINE (TURBO) AND ENGINE> ,
INSPECTION PROCEDURE 5 .
lDoes not move (forward or reverse)
[Comment]
P r o b a b l e c a u s e ‘
When the engine is idling, the vehicle does not mov e forward or in reverse even if the selectorl
Abnormal reducing pressure
l
lever is shifted from
to 2, or range. In such cases, the cause is probably abnorm alMalfunction of power train
l
reducing pressure, or a defective oil pump or power train.Malfunction of oil pump
l ‘ o f v a l v e b o d y
Refer to Automatic Transaxle Overhaul
O K
Hydraulic pressure test (Refer to .
l Measure the reducing pressure in range while the
engine is idling.
Standard value:
psi)
NG
Reducing pressure OK
Power train check lDisassemble the transaxle, check the condition of t he
and repair or replace if necessary.
Check to be sure that there are no abnormalities su ch
lIf it is considered that the damage or chipping can
not
be repaired, replace the valve body assembly.If there is an abnormality, replace the oil pump as sembly.
INSPECTION PROCEDURE 6
l Engine stalling during shifting
cause
[Comment] Malfunction of engine systemWhen the engine is idling, the engine stalls when t he selector lever is shifted from to l
2, or range. In such cases, the cause is probably a defe ctive engine system or damper lMalfunction of torque solenoid
clutch control solenoid valve. Malfunction of body l
Malfunction of torque converter
Refer to Automatic Transaxle Overhaul
Enaine check .
l the control system, ignition system, fuel system a nd main engine system, and confirm that everything is l If there is an abnormality, repair or replace the e ngine system.
After completion
Solenoid valve connector check
l Check to be sure that there is no water in the conn ector.
l Check to be sure that none of the terminals are sho
rted to each other.
After completion
Torque converter clutch solenoid check l Check to be sure that the valve is not sticking due to foreign materials packed inside solenoid.
l If there is an abnormality, replace the solenoid as sembly.
After completion
Transaxle cooling system check l Check for plugged cooler lines.
l Check for plugged oil cooler.
After completion
Valve body disassembly, cleaning and reassembly
l
l Pay particular attention to loosening of bolts, and
to damage, chipping or slippage of O-rings, valve intermediate plate and body.
If it is considered that the damage or chipping can not be repaired, replace the valve body assembly.
After completion
Torque converter check l Check to be sure that there is no sticking due to s eparation from the damper clutch.
l If there is an abnormality, replace the torque conv erter assembly.
Revision

AUTOMATIC TRANSAXLE
ENGINE (TURBO) AND ENGINE> Troubleshooting
INSPECTION PROCEDURE 7
lShocks when shifting from to and long lag timeProbable cause
[Comment]l Malfunction of rear clutchWhen the engine is idling, abnormal shocks or a lag time of 2 seconds or more occur whenMalfunction of valve bodythe selector lever is shifted from to range. In such cases, the cause is probably a defe ctiveMalfunction closed switch’
rear clutch or valve body
.
Refer to Automatic Transaxle‘ Overhaul
When does the shock occur? When shifting from
to
Rear clutch system check l Remove the transaxle, oil pan and valve body. When starting offShocks sometimes occur
Pistons should and should also be maintained when’ air is blown through the rear clut
ch
oil holes in the transaxle case.
NG
Rear clutch check l Check for burning of the facing,
defective piston seal rings and
interference between the end plateand retainer.
Valve body disassembly, cleaning andreassembly
of bolts, and to damage, chipping
or slippage of O-rings, valve inter-
mediate plate and body.
lIf it is considered that the damage
or cannot be repaired, place’ the-valve body assembly.
OK
Yes
Closed switch check l Check the throttle positionswitch system. according to Eon procedures 17. to
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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.