1989 MITSUBISHI GALANT automatic

AUTOMATIC TRANSAXLE - Troubleshootina
1993 model
P range
100
80
60 40
20
Idle
1-1 2 (D.2)
c
tfI* 2(L)2-13 (2,L)3--4(b)
I II I III
1,000 2,000 3,000 4,000 5,000 6,000 7,000
Transferdrive gearrpm
1
0102030 4050 60 708090100110120 130140 150160170 180 19
0
(0)(6)(12)119)(24)(31)(37)(43)
(49)(56)(62) (68)(75)(81)(87)(93)(99) (106)(111)(118)
Vehiclespeed km/h(mph)
TFA0932
E range
31
F.-c
ti
a,
5:‘5
if
100
80
-
60 Idle
I I
II
III II1
1,0002,000
3,0004,000
5,0006,000
7,000
Transferdrivegearrpm ,
III
tIIII , , , tI(00)(6) 10(12) 20 (19) 30(24) 40 (31) 50 (37) 60
(43) 70(49) 80(56) 90(62) 100(68) 110
(75) 120(81) 130(87) 140(93) 150(99)(106)(111)(118) 160 170 180 190
Vehiclespeed km/h(mph)
TFA0933
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23-44AUTOMATIC TRANSAXLE - Troubleshooting
INSPECTION OF ELECTRONIC CONTROL SYSTEM COMPONENTS1. Wiring Based on the wiring diagram,
improper connection of
check whether the continuity and connector, damaged or
disconnected harness,
grounding of each harness IS OK. or incorrect wiring con-4
nection.
cContinuity> 4
4
Reconnect the connec-
I
Normal
Itor; repair or replace the
harness.
2. Oil-temperature
sensortemperature and check theresist-ante between the terminals 1 and2 (FWD),1and2 or 2 and 3 Damaged
or disconnected
Replace the oil-
temperature sensor
FWD (1993 model)
TFA0821
AWD (Up to 1992 model) 1
1. Low temperature side
~
2. Ground
3. High temperature side
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23-46AUTOMATIC TRANSAXLE - Troubleshootincl
5. Pulse generatorA or B (checking
by an oscillo-
scope)K
Connect the pulse generator and
body harness, and connect an
oscilloscope. Check with the
chassis on a dynamo or with the
front wheels raised.
Oscilloscope waveform
FWD
/VT
Noise
/Ah --L
Ar
IP
-iE
171091 AWD
AA
Noise
W
ith the selector lever at the “L”
position and the engine running at
1,000 rpm, check the voltage
waveform between terminals 1
and 2.
1
W
ith the selector lever at the
“L”position and the engine running at
1,000 rpm, check the voltage
waveform between terminals 3
and 4.
Noise
A
(6
171092+
Normal incorrect installation of
the pulse generator, or malfunction of the pulse
generator. 4
Correct the installation
condition, or replace the
pulse generator.
Replace the pulse
generator.
Incorrect installation of
the pulse generator, or
malfunction of the pulse
generator. 4
Correct the installation
condition, or replace the
pulse generator.r
Replace the pulse
generator.
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AUTOMATIC TRANSAXLE - Troubleshooting23-47
Check the resistance betweenShort-circuit, or dam-
terminal 1 of the solenoid valve aged or disconnected
connector and the transaxle case. wiring4 4
2.9
+ 0.3Q/20°C (68°F)1Replace the PCSV.
t
Solenoid valve
connector terminals
PCSVTCC solenoid
;g;:;
Connect 12V between the trans-
axle case and terminal 1;
switch ON and OFF and check for
operation noise.
1
Noise exists. 1Replace the PCSV.1J
NormalI
valve connector and the transaxleAlShort-circuit, or
dam-aoed or disconnected-=!-- -’ -.
wrringI
I
f
22.3 k l.5Q/20°C (68°F)Replace the SCSV.
4II,1 I \
Connect
12V between the trans-
axle case and terminal 3 or 4; switch ON and OFF and check for
operation noise of the solenoid
valve, and check the valve stroke.
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yF$$;za;:pulated in /
+
Noise exists. 4
Normal
1Replace the SCSV.]

23-48AUTOMATIC TRANSAXLE
- Troubleshooting
1 press the foot, brake firmly.1W
ith the engine
idliqg, de-
Let the engine continue idling.
3
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4;ry;pn”g’ y stment 1
+
Readjust the ,idling.
1 ~i$.;h~,~~~e clutch 1

AUTOMATIC TRANSAXLE - Troubleshootinn
9. Torque
conver-
ter clutch
(TCC)solenoid Check the resistance between
terminal 2 of the solenoid valve connector and the transaxlecase.
Short-circuit, or dam-
too low
or too aged or disconnected
wiring
I
Solenoid valve
4*
(Standard value: 3 Q/2O”CReplace the TCC solenoid
/-connector terminals
Connect 12V between the trans-
*Stickingis
usually at the
1750338
4
Normal1release side.
4
Replace the TCC solenoid
W
ith the accelerator pedal not
depressed, check the resistance between terminals 1 and 2.
1
Continuity exists (resistance: 0)
Problem not solved.
1
1
E/l2
171096 Replace the accelerator
switch.
W
ith the accelerator pedal de-
No continuity (resistance:
CQ)I
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+
Normal

23-50AUTOMATICTRANSAXLE-Troubleshooting
11. Park/Neutralposition switch In the “P”
range, check for con-
tinuity between terminals 3 and
4, and terminals8 and 9 ___ Up to1992 model or terminals 1 and
4, and terminals 5 and 8 _._ 1993
Up to 1992 model
1993 model
‘FA0802
\ mode
l
\I
4
cContinuitv exists-I
In the
“R”
range, check for con-
tinuity between terminals 4 and 7, and terminals
10 and 11 Up\
to 1992 model or terminals 4and IO, and terminals 6 and 7
1993 model
I
+
Continuity exists>I
tinuity between’terminals 2 and
~~
Continuity existsI
iv- trnurty
between termrnals
4 and
\nals4 and 9 __. 1993 model/
Continuity existsI
(() trnurty
between terminals 1 and
(Continuity exists
In the
“L” range, check for con-
tinuitv between terminals 4 and
5 .
Up to 1992 model or termi-
nals 4 and 11 . 1993 model
(Continuitv exists
Normal
F No continuity-)+I1
,1
Replace the park/neu- tral
position switch.
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AUTOMATIC TRANSAXLE - Troubleshooting23-51
Check for continuity between the
1989 and
1990 model
1750447
1990.5, 1991 and
1992 model
19811
TFAO389
check for continuity between the kickdown
servo switch terminal
and the transaxle case. Poor contact (sticking)
NOTE: Be sure the brakes are
\ applied during’this
check. /\I+
No continuity
1993 model
A6-l
+
Normal1
k&f TFA0809, ,
Disconnect the
13. Transaxle con-
hicle’s TCM. Then connect, via Malfunction of the
original TCM
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Same problem (as before TCM
exchange) occurs.