1991 MITSUBISHI 3000GT engine

MANUAL TRANSAXLE - Transaxle Assembly22-15
idPost-installation Operationl Installation of Front Under Cover(Referto GROUP 51 -Front Bumper.)l Supplying of Transmission Oil (Refer to P.22-9.)l Filling of Engine Coolant (Refer to GROUP 14-
Service Adjustment Procedures.)70 Nm
l Checking Operation of Shift Lever at Each Positionl Checking the Operation of the Meters and Gauges26
ft.lbs.09FOO84
4*9. Connection for transaxle mount16. Starter10. Transaxle mount bracket4*17. Drive shaft (Left side),
l * 11. Mounting stopperinner shaft assembly12. Transaxle assembly upper part+* ** 18. Drive shaft (Right side)
coupling bolt19. Transaxle stay (Front bank side)4*13. Connection for tie rod end20. Transaxle stay (Rear bank side)4*14. Connection for lower arm4*21. Transaxle assembly lower part
ball jointcoupling bolt15. Right member4*22. Transaxle assembly
SERVICE POINTS OF REMOVALMZZMBBA6. DISCONNECTION OF THE CLUTCH TUBE BRACKET
AND CLUTCH DAMPER ASSEMBLY
Remove the clutch release cylinder and clutch oil line
bracket installation bolt, and then secure at the body side
without disconnecting the oil line coupling.
1 TSB Revision

MANUAL TRANSAXLE - Specifications
SPECIFICATIONS
22-49
MZZCA-B
iGENERAL SPECIFICATIONS
L
Items
Model
Applicable engine
Type
Gear ratio
1 St
2nd
3rd
4th
5th
Reverse
Reduction ratio
Primary
Front differential
Transfer
Speedometer gear ratio (driven/drive)
Oil quantityliters (qts.)
Transaxle
Transfer
Specifications
W5MGl-0-FNBR
6G72-DOHC (Turbo)
5-speed transaxle floor shift
3.071
1.739
1.103
0.823
0.659
3.076
1.375
2.888
0.814
27136
2.4(2.5)
0.27(.29)
LLUBRICANTSMUCD-B
Items
Specified lubricants1 Quantity lit. (qts.)I
classification GL4 or higher
1 Transfer oil seal lip
a:
TSB Revision

23-12AUTOMATIC TRANSAXLE - Specifications
SPECIFICATIONSGENERAL SPECIFICATIONS~
M23CA.C
Items
Model
TypeTorque converter
WeEngine stall speed
Stall torque ratioSpecifications
F4A33-I-MNN2Full automatic
4 speed transaxle
3 element with damper clutch
2,200- 3,200 rpm
1.80Transaxle
TypeGear ratio
First
Second
Third
Fourth
Reverse
Final gear ratio
Speedometer gear ratio (Drive/Driven)Electronically controlled4-speed full-automatic
2.551
1.488
1.000
0.6852.176
3.95836128
SERVICE SPECIFICATIONS
M23CB-Cmm (in.)
‘dterns
Standard value
Accelerator switch switching point
Sleeve and selector lever assembly end play
Transfer driven gear preload
Low-reverse brake end playSpecifications
2
- 6 (.079 - .24)
15.2
- 15.9 (598 - .625)0.075-0.135
(.0030- .0053)1
.O - 1.2 (.0394 - .0472)Input shaft end play
0.3
- 1 .O t.0118 - .0394)Differential case preload
0.075
- 0.135 (0030 - .0053)Differential gear and pinion backlash
0.025
- 0.150 LOOI 0 - .0059)Oil pump side clearance
0.03
- 0.05 (.0012 - .0020)Output flange bearing end play
0
- 0.09 (0 - .0035)Front clutch end play
0.8
- 1 .O (0315 - .0394)Rear clutch end play
1 .O - 1 .j (.0394- .0472)End clutch end play
0.60
- 0.851.0236 - .0335)
1 TSB Revision

AUTOMATIC TRANSAXLE - Troubleshootincl23-19Based upon use of the troubleshooting
Checks should be made of fluid levels and
the condition of the ATF, as well as the
condition of the manual control cables;
adjustments should then be made if found
to be necessary.
If a presumption has been made that there
is an abnormal condition somewhere in
the electronic-control system, check the
fault code, in order to determine the
probable location of the problem, by using
a multi-use tester or voltmeter.
I
When the abnormal system is discovered,
check each element (sensors, etc.) one by
one, and make repairs as necessary.
IWhen the abnormal condition is presumed
to be in the oil-pressure-control system
When the result of the oil-pressure test
does not satisfy the specified pressure,
check each system at places related to the
valve body, check the oil-pressure pas-
sages for leakage, etc.
I
If the problem isunusually dirty ATF,
abnormal noises, oil leakage, or slippage of
the clutch or brakes, or an abnormal
condition of the transaxle itself, disassem-
ble and repair the transaxle.
TROUBLESHOOTINGM23EEAYFunctional malfunctions of the ELC4A/T can lead to other
problems, such as those described below:(I
) 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 question
the user concerning the details of the problem, such as 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 should 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.
TSB Revision

23-28AUTOMATIC TRANSAXLE - Troubleshooting
INSPECTION OF CONTROL SYSTEMCheck the control system by using the multi-use tester and following the procedure given below.
CONTROL SYSTEM INSPECTION TABLE
Check Item
sensor
l Data listl Item No. 15Cold engine (before start)nglne warming up
l Data listl Item No. 23
or circuitharness
Item No. 26
lerator pedal switchl
Item No. 27l Defective inhibitor switch circuitl Defective TPS circuitl
Defective pulse generator A
shielded wire
l External noise interference
TSB Revision

23-30AUTOMATIC TRANSAXLE - Troubleshooting
TRANSMISSION CONTROL UNIT
The connector has 42 pins to accommodate the increased number of senso.r inputs.
Here are the pin assignments.
uu
101.102.103.
104.105.
106.
107.
108.
109.
110.
1.
3':4.
Z:
i:9.10.11.
12.
13.
14.
15.
16.
17.
18.
51.
52.
53.
54.
55.
56.
57.
58.
59.
60.
61.
62.
63.
64.Damper clutch control solenoid valve
Shift control solenoid valve A
-Power source
Ground
Pressure control solenoid valve
Shift control solenoid valve B
. .
*Engine communrcatron srgnaiPower source
Ground
Ground
-Accelerator switch
-Diagnosis output terminal
Air-conditioner relay signal
Engine communication signal
Diagnosis control terminal
Engine communication signal
Power source (backup)Kickdown servo switch
Idle switch
oil temperature sensor (Low temperature side)
Oil temperature sensor (High temperature side)
Throttle position sensor
Sensor ground
Vehicle-speed reed switch
Inhibitor switch
(P)Inhibitor switch (R)Inhibitor switch (N)Inhibitor switch (D)
Inhibitor switch (2)
Inhibitor switch
(L)Overdrive switch
Pulse generator B
Pulse generator B
Pulse generator A
Pulse generator A
Ground
Ignition pulse
Power mode signal
TFA0360
TSB Revision

23-32AUTOMATIC TRANSAXLE - Troubleshooting
INSPECTION OF ELECTRONIC CONTROL SYSTEM COMPONENTS
1. WiringBased on the wiring diagram.check whether the continuity andgrounding of each harness is OK.
I
(
4
ContinuityII
+
Normal~ Improper connection of
connector, damaged ordisconnected harness,
or incorrect wiring con-
nection.
I
Reconnect the connec-tor; repair or replace theharness.Vary the thermo-sensitive part
2. Oil-temperaturefrom low temperature to highsensortemperature and check theresist-Damaged or disconnected
ante between the terminals 1 anwiring2or2and3.
4
J
Changes of the resistance con-Replace the oil-
tinuous and smooth.temperature sensor
41750447
Normal1
1:LOW temperature side2: Ground
3:High temperature side
I:3. Throttle-
K
Check the resistance between
Ip~~~t,ion sensorterminals 1 and 4 of the TPS.hiah or infinitem- -----inecteciI-
\ IDamaged or discon-..----Awiring
I
c3.5 - 6.5 kW20”C (68°F)t
v
Replace the TPS.I>ITPS terminal
7FUO5351. Ground
2. Idle switch
3. output
4. Power
Check the resistance betweenterminals 4 and 2 with the engine
idling after throttle-valve opening
warm-up.
Resistance: approx. 0.4
kR/20°C (68°F)
Changes of the resistance con-
tinuous and smooth.
/Resistance:\more or less
than 0.4 kQ/Improper adjustment
Istallaiion.I
Check for changes of theresist-ance between terminals 4 and 2when the throttle valve is
operated from the idling position
o the fully open position.
Poor contactII
TSB Revision

AUTOMATIC TRANSAXLE - Troubleshooting23-33
4. Pulse generatorCheck the resistance betweenAorBterminals1and 2or3and4.agedordisconnected
iv1-Pulse generator terminalsl-2: pulse
generator A3-4 pulse
generator B
17503381I\Connect the pulse generator and
front wheels raised.
Oscilloscope waveform
With the selector lever at the “L”
position and the engine running at
1,000 rpm, check the voltagewaveform between terminals1(
1 .OOO mVp-p or higher
Noise>
iJh
171092
f\/ With the selector lever at the “L”\
position and the engine running at1,000 rpm. check the voltagewaveform between terminals 3and 4.
I
1fWWF;tf: pulse /
Correct the inst.allationcondition, or replace the
pulse generator.
L-
*
500 mVp-p or higherI
Noise
ICorrect the installationcondition. or redace theI1 pulse generator,.1
171092
*
Normal1
1 TSB Revision