brake MITSUBISHI ECLIPSE 1991 Service Manual

AUTOMATIC TRANSAXLE - TroubleshootingBased upon use of the troubleshooting
guide, the probable location of the prob-
lem should be estimated.
Checks should be made of fluid levels
and the condition of the ATF, as well as
bles; adjustments should then be made if
If a presumption has been made that
there is an abnormal condition some-
check the fault code, in order to determinethe probable location of the problem, by
When the abnormal system is discovered,
check each element (sensors, etc.) one byone, and make repairs as necessary.
“~^II_When the abnormal condition is pre-
sumed to be in the
orI-pressure-controlsystem, check by making an oil-pressure
If the problem is unusually dirty ATF,
of the clutch or brakes, or an abnormal
condition of the transaxle itself,
disassem-TROUBLESHOOTING
”N21EeAYFunctional malfunctions of the ELC4A/T can lead to other
problems, such as those described below:
(1) Improper maintenance and/or adjustments
(2) Malfunctions of the electronic control functions
(3) Malfunctions of mechanical functions
(4) Malfunctions of hydraulic control functions
(5) Malfunctions of engine performance
etc.In order to properly determine (“Troubleshoot”) the source of
these malfunctions, it is first essential to methodically ques-
tion the user concerning the details of the problem, such qs
the condition of the problem, the situation at the time the
problem occurred, and any other relevant information, all in as
much detail as possible. The user
shoutd also be asked
whether or not the problem has occurred more than once,
and under what conditions.
Subsequently, certain tests should be conducted in a certain
order, as described at the left.

21-178AUTOMATIC TRANSAXLE - Troubleshooting
09P0010Fluid level must be
within this range.09PoOll
0”
Two302
DIAGNOSIS AND TEST
FLUID LEVEL AND CONDITION1. Drive until the fluid temperature reaches the usual tem-
perature
[70-80°C (160- 18O”F)I.2. Place vehicle on level floor.
3. Move selector lever sequentially to every position to fill
torque converter and hydraulic circuit with fluid, then place
lever in “N” Neutral position. This operation is necessary tobe sure that fluid level check is accurate.
4. Before removing dipstick, wipe all dirt from area around
dipstick. Then take out the dipstick and check the conditionof the fluid.
The transaxle should be overhauled under the following
conditions.l If there is a “burning” odor.
l If the fluid color has become noticeably blacker.
lIf there is a noticeably great amount of metal particles inthe fluid.
5.Check to see if fluid level is in “HOT” range on dipstick. If
fluid level is low, add automatic transaxle fluid until level
reaches “HOT” range.
Low fluid level can cause a variety of conditions because itallows pump to take in air along with fluid. Air trapped in
hydraulic circuit forms bubbles which make fluid spongy.
Therefore, pressures will be erratic.
Improper filling can also raise fluid level too high. When
transaxle has too much fluid, gears churn up foam and
cause same conditions which occur with low fluid level,
resulting in accelerated deterioration of automatic transaxle
fluid.In either case, air bubbles can cause overheating, fluid
oxidation, which can interfere with normal valve, clutch,
and servo operation. Foaming can also result in fluid
escaping from transaxle vent where it may be mistaken for
a leak.
6. Be sure to examine fluid on dipstick closely.
CONTROL CABLE
Whether control cable is properly adjusted can be confirmed bychecking whether inhibitor switch is performing well.
1. Apply parking brakes and service brakes securely.
2. Place selector lever to “R” range.
3. Set ignition key to “ST” position.
4. Slowly move the selector lever upward until it clicks as it
fits in notch of “P” range. If starter motor operates when
lever makes a click, “P” position is correct.
5.Then slowly move selector lever to “N” range by the same
procedure as in foregoing paragraph. If starter motor
operates when selector lever fits in “N”, “N” position is
correct.6. Also check to be sure the vehicle doesn’t begin to move
and the lever doesn’t stop between P-R-N-D.
7. The control cable is properly adjusted if, as described
above, the starter motor starts at both the “P” range and
the “N” range.

AUTOMATIC TRANSAXLE - Troubleshootina
Code.> ‘)No.Output pattern
DescriptionRemedy
41Damaged or disconnected wiringl Check the solenoid valve connec-of the shift control solenoid valve
nnnn A
tor.lCheck shift control solenoid valve Citself.
42Short circuit of the shift control
uuu-mn
solenoid valve A
43Damaged or disconnected wiring
l Check the solenoid valve connec-of the shift control solenoid valve
- B
tor.l Check shift control solenoid valve Eitself.
44Short circuit of the shift control
uuvuwlnsolenoid valve B
45Damaged or disconnected wiringlCheck the, solenoid valve connec-,.
uuuumnof the pressure control solenoidtor.valvel Check the pressure control sole-
noid valve itself.
46
J-~-,,-=
Short circu.it of the pressure con-trol
solenoid valve
47Damaged or disconnected wiringl Check the solenoid valve connec-
of the damper clutch control
sole-nnnn~ noid valvetor.l Check the damper clutch control
solenoid valve itself.48
Short circuit of the damper clutchnnnncontrol solenoid valveMalfunction of the damper clutch
l Check the damper clutch hydraulicsystem
pressure system.l Check the damper clutch control
solenoid valve itself.
l Replace the control unit.
51First gear non-synchronouslCheck the pulse generator A and
UUUUI~
pulse generator-B connectors.l Check pulse generator A and pulsegenerator B themselves.l Rear clutch slippage.
52Second gear non-synchronouslCheck the pulse generator A and
pulse generator B connectors.
uuuul nnlCheck pulse generator A and pulsegenerator
B themselves.l Rear clutch slippage.l Kickdown brake slippage.
I-Y I”*
12Ao106

21-182AUTOMATIC TRANSAXLE - TroubleshootingDescription
Code
No.
53Output pattern
UUUULnnn-
Remedy
lCheck the pulse generator A output
circuit harness.
lCheck the pulse generator A and
pulse generator
B connectors.
lCheck the pulse generator A andpulse generator B themselves.
l Front clutch slippage.l Rear clutch slippage.
lCheck the pulse generator A output
circuit harness.
lCheck the pulse generator A and
pulse generator B connectors.
l Check pulse generator A and pulsegenerator
B themselves.
l End clutch slippage.
l Kickdown brake slippage. Third gear non-synchronous
54Fourth gear non-synchronous
uuuuLnMn-12A0106
FAIL-SAFE CODE DESCRIPTION
CodeNo.Output patternDescriptionFail-safeNote (relation
to fault code)
81Damaged or disconnectedwiring of the pulse generator
A3rd gear (D) or 2nd
gear (2, L) hold
31
3rd gear(D) or 2ndgear (2, L) hold
32Damaged or disconnectedwiring of the pulse generator
B
82
83
3rd gear hold41,42Damaged or disconnectedwiring, or short circuit, of shift
control solenoid valve A43,44
843rd gear hold
Damaged or disconnectedwiring, or short circuit, of shift
control solenoid valve
B
Damaged or disconnectedwiring, or short circuit, of the
pressure control solenoid
valve
45,463rd gear(D) or 2ndgear (2, L) hold85
86Shift steps non-synchronous3rd gear (D) or 2nd
gear (2, L) hold51,52,53,54
12LO296

21-184AUTOMATIC TRANSAXLE - TroubleshootinaSelector
lever
position
P
R
N
ELEMENT IN USE AT EACH POSITION OF SELECTOR LEVER
2
LCl
Front clutch
C2 Rear clutch
C3 End clutch
Bl Kickdown brakeSHIFT PAlTERNS82 Low-reverse brake
OWC Oneway clutchTwo shift patterns are pre-stored in the control unit of this
transaxle. One is the power pattern (for more powerful
performance), and the other is the economy pattern (for
improved fuel consumption and quieter operation).
The driver can select and switch to the desired pattern by usingthe power/economy select switch on the center console.
The solid lines shown in these shift patterns indicate up-shifts,
and the broken lines indicate down-shifts. The reason why
there is a difference between the shift points for up-shifts and
for down-shifts is so that up-shifts and down-shifts will not
occur frequently when driving at a speed in the vicinity of the
shift point.
When the vehicle is stopped, there is a shift to
2nd gear in
order to obtain a suitable “creeping”, but when the accelerator
pedal is then depressed the vehicle starts off in
1st gear.

AUTOMATIC TRANSAXLE - TroubleshootingSet the selector lever to “P” or“N”, and start the engine.
IWith the engine idling,
de-
Dress the footbrake firmlv.I
( Let the engine continue idling. )
NormalImproper adjustment
of idling
I

21-194AUTOMATIC TRANSAXLE - TroubleshootingCheck for continuity between the
kickdown servo switch terminal
TFA0389Start the engine, set to the “L”Continuity exists
+
range, and let the engine idle;check for continuity between the
kickdown servo switch terminaland the transaxle case.
NOTE: Be sure the brakes are
applied during this check.
+No continuity
“‘
Poor contact (sticking)
4
Replace the K/D servoswitch.
.
+
Normal
Disconnect the harness (both A
and B connectors) from the vehi-
Malfunction of the ori-
ginal TCU
Consider the original TCU to be
Same problem (as before TCU
exchange) occurs.

AUTOMATIC TRANSAXLE - Troubleshooting21'495
OIL PRESSURE TESTS
1.
2.
3.
4.
5.Completely warm up the transaxle.
.”Raise the vehicle by using a jack so that the drive wheels
can be rotated.
Connect an engine tachometer and place it in a position
where it’s easy to see.
Attach the special oil-pressure gauge
(C-3292 or C-3293)and the adaptor
(MD998332) to each oil-pressure outlet
port.When the reverse pressure is to be tested, the 3,000
kPa(400 psi) type of gauge should be used.
Measure the oil pressure under various conditions , and
check to be sure that the measured results are within the
standard value range shown in the “Standard oil pressure
table” below.
If the oil pressure is not within the specified range, check
and repair as described in the section “Remedial steps if oilpressure is not normal” on the next page.
m // @ Kickdown brake

21-196AUTOMATIC TRANSAXLE - TroubleshootingStandard Oil Pressure Table
F4A22
Standard oil pressure kPa (psi)Conditions
1NIdlingNeutral360-490(51-70)
2DIdling2nd gear360-490(51-70)
3&ON,Approx.360-4902,5004th gear(51-70)830-900830-900(118-128) -(118-128) -
830-900830-900830-900350-450(118-128)(118-128)(118-128) -(50-6434(SWF)oFF, ,A2pp5boox.3rd gear360-490(51-70)
52Approx.2nd gear360-4902,500(51-70)830-900(118-128)-
6LAp”60”.1st gear360-490(51-70)-I-
1,640-2.240(233-319)-
l-41,500 (213)or more1 or more I
TStandard oil pressure kPa (psi)
0Kickdown
brakepressure
(Release)
@IFrontclutchpressure
0Rearclutchpressure
c3Endclutchpressure
0Low-reverse
brakepressure
00ShiftpositionReducing KickM;vnpressurepressure
-l---l
(APPM
Neutral !r$I$$ -
c3Torque-converter
pressure
h
No.SelectleverpositionEnginespeed
m
Idling
IdlingApprox.2,500Approx.
1,000Approx.2,500
N-
-
LI
*D730-830(104-118)2nd gear (51-68)I I360-480 100-210(14-30)-
830-900(118-128)(SWFON,-
830-900(118-128)830-900(118-128)4SW%FF:830-900(118-128)830-900(118-128)
2450-650(64-92)
*
450-650(64-92)
830-900(118-128)
830-900(118-128)
-
-6,640-2.24C
(233-319),640-2.24C(233-319)I ,640-2.24C(233-319)III
17-
1.500 (213)or more1,500 (213)or more1,500 (213)or more
NOTEmust be 10 kPa (1.4 psi) or less.SW-ON: Switch ON the overdrive control switchSW-OFF: Switch OFF the overdrive control switchI+: Hydraulic pressure is generated, but not the standard value.

AUTOMATIC TRANSAXLE - TroubleshootingRemedial Steps If Oil Pressure Is Not Normal
F4A22.,,‘
frouble symptomProbable causeRemedy1;
I. *Line pressures
a.Clogging of oil filtera.Visually inspect the oil filter; replace the oil filte
are all low (or high).
if it is clogged.
NOTEb.Improper adjustment of oil press-b.Measure line pressure @ (kickdown brake*“Line pressures”ure (line pressure) of regulator
pressure); if the pressure is not the standard
refers to oil
ress-ures@,@, 4 and
8
valvevalue, readjust the line pressure, or, if neces-sary, replace the valve body assembly.
@in the “Standardc.Sticking of regulator valvec.Check the operation of the regulator valve;oil pressure table”repair if necessary, or replace the valve body
on the previousassembly.
page.d.Looseness of valve body tighten-d.Tighten the valve body tightening bolt and
ing partinstallation bolt.‘- ,
e.Improper oil pump dischangee.Check the side clearance of the oil pump gehr;
pressurereplace the oil pump assembly if necessary.
I. Improper reducinga.Improper line pressurea.Check the @ kickdown brake pressure (line
pressurepressure); if the line pressure is not the
standard value, check as described in item 1
above.
b.Clogging of the filter (L-shapedb.Disassemble the valve body assembly and
type) of the reducing-pressure cir-check the filter; replace the filter if it is clogged.cuit
c.Improper adjustment of the re-c.Measure the @I reducing pressure; if it is not
ducing pressurethe standard value, readjust, or replace the
valve body assembly.
d.Sticking of the reducing valved.Check the operation of the reducing valve; if
necessary, repair it, or replace the valve body
assembly.
e.Looseness of valve body tighten-e.Tighten the valve body tightening bolt and
ing partinstallation bolt.
#. Improper kick-a.Malfunction of the D-ring or seala. Disassemble the kickdown servo and check
down brake press-ring of the sleeve or kickdownwhether the seal ring or D-ring is damaged.
ureservo piston.If it is cut or has scratches, replace the seal ring
or D-ring.
b.Looseness of valve body tighten-b.Tighten the valve body tightening bolt and
ing partinstallation bolt.
c.Functional malfunction of thec.Replace the valve body assembly.
valve body assembly
. Improper front
clutch pressure
a.Malfunction of the D-ring or seala. Disassemble the kickdown servo and check
ring of the sleeve or kickdownwhether the seal ring or-D-ring is damaged.servo piston.
If it is cut or has scratches, replace the seal ring
or D-ring.
b.Looseness of valve body tighten-b.Tighten the valve body tightening bolt and
ing partinstallation bolt.c.Functional malfunction of thec.Replace the valve body assembly.
valve body assembly
d.Wear of the front clutch piston ord.Disassemble the transaxle itself and check
retainer, or malfunction of the
@whether or not there is wear of the front clutch
D-ring, @ seal, ring.piston and retainer inner circumference, or
ra;;; to the figure on the nextdamage of the D-ring. If there is any wear or
damage, replace the piston, retainer, D-ring
and/or seal ring.
1. Improper endclutch pressure
a.Malfunction of a D-ring @or seala.Disassemble the end clutch and check the sealring 0, @of the end clutch or
O-ring @I of the pipe (Refer to thering, D-ring of the piston, seal ring of thefollowing figure.)retainer, etc.; replace if there are cuts, scars,
scratches or damage.
b.Looseness of valve body tighten-b.Tighten the valve body tightening bolt and
ing partinstallation bolt.c.Functional malfunction of thec.Replace the valve body assembly.
valve body assembly