check engine MITSUBISHI SPYDER 1990 Service Repair Manual

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.
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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.

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> Troubleshooting
INSPECTION PROCEDURES 12
l Some points (Early, late shifting points) P r o b a b l e c a u s e
[Comment]Some shift points occurs early, late while driving.
In such cases, the cause is probably al
Malfunction of valve body
defective valve body, or it is a phenomenon related control and is not an abnormality.
Refer to Automatic Transaxle Overhaul
Does fuzzy shifting occur normally? No problem because it is a phenomenon that appears due to
Nofactors associated with control.
YesDeviations at some shift points occurs only when the ATF is cold or less].
NoYes Deviations at some shift hot or more].
Valve body disassembly, cleaning and reassembly
Pay particular attention to loosening of bolts, and to damage,
If it is considered that the damage or chipping can not be
repaired, replace the valve body assembly.
INSPECTION PROCEDURE 13
lNo fail-safe codes (Does not shift)Probable cause
[Comment]l Malfunction of overdrive switch
Shifting does not occur while driving, and no fail- safe codes are output. In such cases, the l
cause is probably a defective overdrive switch or P ark/Neutral position switch.Malfunction of Park/ Neutral position switch
l Malfunction of power supply circuit
l Malfunction of TCM
No
Yes
Check to be sure that backup power is being supplie d to
the TCM.Does overdrive operate?
Yes
SCAN TOOL Data list
l 35 Overdrive switchCheck to be sure that power is being supplied to th e TCM
SCAN TOOL Data list
l 37 Park/ Neutral position switch
I OK: TCM input signal and selector lever position
should match.
Check the overdrive switch system according to insp ection
NGOK
, procedure (Refer to
Replace the TCM. ,
OK: When overdrive switch turns from OFF to ON,
scan tool display turns from OFF to ON.
Code No. 36, 37
Park/Neutral position switch system
(Refer to
Power circuit check
lPay particular attention to open circuits in the ha rness,defective connector connections and open circuits i nfuses.lIf there is an open circuit in a fuse, the cause of
the should be located and it should be
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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>
INSPECTION PROCEDURE 16. .
l Overdrive switch system Probable cause .
[Comment]l Malfunction of overdrive switch In cases such as the above, the cause is probably a defective overdrive switch circuit or defectivelMalfunction of ignition switch circuit.
l Malfunction of ignition switch
l Malfunction of TCM
Overdrive switch check to
NG Replace
Measure at overdrive switch connector
lVoltage between terminals (3) and
OK: Battery positive voltage
OK.NG
OK
Repair
Check trouble svmotom.
Check the l
OK
NG Repair
ignition switch and overdrive switch
NG
NG
Repairoverdrive switch and TCM connectors.OK
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the TCM.
. .
INSPECTION PROCEDURE 17
l Closed throttle position switch system
Probable cause
[Comment]In cases such as the above, the cause is probably a defective closed throttle position switchl
Malfunction of closed lcircuit.Malfunction of connector
l Malfunction of
Closed throttle position switch check Replace the position sensor.
(Refer to GROUP On-vehicle
Inspection of Components.)
OK
Check the following connectors:NG Repair
.
OK
Check trouble
NG
Check the harness wire between theN G Repairclosed throttle position switch and TCM
connectors.
OK
Replace the TCM.

AUTOMATIC TRANSAXLE
ENGINE (TURBO) AND ENGINE> Troubleshooting
INSPECTION PROCEDURE 18l A/C load signal system
[Comment]In cases such as the above, the cause is probably a defective Idle position switch circuit.
Dual pressure switch check (Refer to
NG Replace
GROUP 55 On-vehicle Service.)
OK
Measure at TCM connector l connector and mea-sure at the harness side.
l Ignition switch: ON
l
switch: ON
lVoltage between terminals (8) and
ground
OK: Battery positive voltage
Check trouble symptom.
NG
P r o b a b l e
system check (Refer to GROUP
55 Troubleshooting.)
Replace the TCM. l
Malfunction of dual pressure
l Malfunction of l Malfunction of A/C system
l Malfunction of TCM
Check the following connectors:
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AUTOMATIC TRANSAXLE .
ENGINE (TURBO) AND
INSPECTION PROCEDURE
l Vehicle speed sensor systemProbable ‘cause
[Comment]l Malfunction of vehicle speed In cases such as the above, the cause, is probably a defective vehicle speed sensor circuit.
Malfunction of connectorl.
l
of TCM
(Refer to
N G Replace
. .. .
Measure at the vehicle speed 1. NGNG Check the following con-, RepairlDisconnect the connector, and measure at the harnes s side.1. Voltage between 1 and ground
(Ignition switch: ON)
OK: Battery positive voltage
2. Voltage between 3 and ground (Ignition switch: ON)
O K :
2. NG
3. Continuity between 2 and ground O K :
NGCheck the following con-+ Repair
OK
Check trouble symptom.
OK
Replace the TCM.
OK
Check trouble symptom..I
NG
Check the ignition switch.
(Refer to GROUP 54 switch)
NGCheck the following con- +.
OK
Check trouble symptom.
NG
NG
Check the harness wirebetween the TCM and thev e h i c l e s e n s o r connector.’
the TCM.
Repair
I
Check the harness wire between the vehicle speed se nsor and
the ground and repair if necessary.
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