1991 MITSUBISHI ECLIPSE Service Manual

AUTOMATIC TRANSAXLE - Troubleshooting21-179
@: ELC-4PJT
@I: Diagnosis control
0: Ground
16R1336
OBTAINING FAULT CODES(1) Connect the voltmeter to the connector for diagnosis.
(2) Read the output fault codes.
Then follow the remedy procedures according to the
“FAULT
CODE DESCRIPTION” on the following page.
NOTEl As many as a maximum of
terr fault codes, in the
sequence of occurrence, can be stored in the Random
Access Memory (RAM) incorporated within the control
unit.l If the number of stored fault codes or fault patterns
exceeds ten, already stored fault codes will be erased,
in sequence beginning with the oldest.
l Do not disconnect the battery until all fault codes or
fault patterns have been read out, because all stored
fault codes or fault patterns will be canceled when the
battery is disconnected.
(3) If the fail-safe system is activated and the transaxle is
locked in
3rd gear, the fault code in the Fail-Safe Code
Description will be stored in the RAM.
Three of these fault codes can be stored.
(4) The
cancelation will occur if, with the transaxle locked in
3rd gear, the ignition key is turned to the OFF position, but
the fault code is stored in the RAM.

21480AUTOMATIC TRANSAXLE - Troubleshootina
FAULT CODE DESCRIPTION
Code
No.Output patternDescription
Remedy
11Abnormal increase of TPS outputl Check the throttle position sensor
nconnector.
l Check the throttle position sensoritself.
12l Adjust the throttle position sensor.
Abnormal decrease of TPS outputl Check the accelerator switch
(Code No. 24output
or not).Malfunction of the throttle-
position sensor or incorrect
adjustment
Damaged or disconnected wiringl Check the oil temperature sensorof low oil temperature sensor
connector.
l Check the oil temperature sensoritself.
16Short circuit of high oil tempera-ture sensor
Damaged or disconnected wiring
of high oil temperature sensor orshort-circuit of low oil tempera-
ture sensor
21
n
Damaged or disconnected wiringl Check the kickdown servo switchof the kickdown servo switch
connector.l Check the kickdown servo switch
itself.
22
nnShort circuit of the kickdown
ser-vo switch
23Damaged or disconnected wiringl Check the ignition pulse signal line.
of the ignition pulse pick-up cable24
Short circuit of the acceleratorswitch or improper adjustmentl Check the accelerator switch con-
nectar.l Check the accelerator switch itself.
l Adjust the accelerator switch.
31
u’u I n
Damaged or disconnected wiring
of the pulse generator AlCheck the pulse generator A and
pulse generator B themselves.l Check the vehicle speed reed
switch (for chattering).32
Damaged or disconnected wiring
uuLnJ-l-of the pulse generator B
12A0104
12A0107

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

AUTOMATIC TRANSAXLE - Troubleshooting214%3
TRANSAXLE CONTROL UNIT
-‘” .The 42 pin connector is for increased sensor input. Terminal
layout for the 42 pin connector is as shown below.TFA0360
101.Damper clutch control solenoid valve
102.Shift control solenoid valve A
103.Oil temperature warning light 104. Power supply
105. Ground
106.Pressure control solenoid valve
107.Shift control solenoid valve B108.
-
109. Power supply
110. Ground
1. GroundL.
-
3.Accelerator switch
4.-5. Diagnosis output terminal
6. Air conditioner relay signal
7.-8. Diagnosis control terminal
9.-
IO. Power supply (Backup)
11. Kickdown servo switch
12.-
13.-14. Oil temperature sensor
15.High oil temperature sensor
16. Throttle position sensor
17.Sensor ground18. Vehicle speed reed switch
51. Inhibitor switch (PI52. Inhibitor switch
(8)53. Inhibitor switch
(N)54. Inhibitor switch
(D)
55. Inhibitor switch (2)56. inhibitor switch
(L)
57.Overdrive switch
58. Pulse generator
B59. Pulse generator
B60. Pulse generator A
61. Pulse generator A
62.Ground63.Ignition pulse64. Power mode signal

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 - Troubleshooting21483
1.8L Engine (F4A22-2-MPD)
+. P range
:,
100II
80c I
I/zb/I/i A’/-60II
Fe
'!zI:I40Jk///@ /'
a,IzI
2Ie20-I
I/' IA (L)24.3 (2,L) 3-14
I(Ds)
IdleI II I1,0002,000
3,000
4,000
5,0006,000Transfer shaft speed
r/min.1I1,
(ii);$(::I(7:)(4:)(::)(i;)(ii)(ii)(56) 90(62) 100(68) 110(75) 120(81) 130(87) 140(93) 150(99) 160(106) 170Vehicle speed km/h (mph)TFA0486
E range
I
- 60I
PI40.
!
a,It:!
ILIlt?1,0002,0003,0004,0005,000~6,000Transfer shaft speed
r/min.1,1I.$1('69(::,(%(%,$7)(i?)(ii,&(56) 90(62) 100(68) 110(75) 120(81) 130(87) 140(93) 150(99) 160(106) 170Vehicle speed
km/h (mph)TFA0487

21-186AUTOMATIC TRANSAXLE - Troubleshooting
2.0L DOHC Engine (F4A22-2-MPDI)
P range
II
i
-
-z2-I
100I
i
801/ I/
;
P60.-
&
840a,s2
e20I
2"c3 (2.L) 39+4 (DA
Idle1,0002,000
3,0004,000
5,0006,000Transfer shaft speed
r/min.Iiik?66)&(35:)(t;,(ii,(49) 80(56) 90(62) 100(68) 110(75) 120(81) 130(87) 140(93) 150(99) 160(106) 170(111) 180(118) 190Vehicle speed km/h (mph)
TFA0488
E range
100IIIII
I
1I --IiI/80I II/ /Y/I II142(D-2)214 3 (D)4(DAIJ/ /I1
I! I
IIo-/A’III-“1m--c
sI
O"40!al5I
2F24 3(2,L)3-1420I
I1I
ldlelI1,0002,000
3,0004,000
5,0006,000Transfer shaft speed
r/min.I1Iii,('$(:;,(%)(;:)&(:?,(&(::I(56) 90(62) 100(68) 110(75) 120(81) 130(87) 140(93) 150(99) 160(106) 170Vehicle speed km/h (mph)
P3)TFA0489