1989 MITSUBISHI GALANT height adjustment

REAR AXLE - Differential Carrier27-35
IllK610
90938-o 1
llY181
llY182
MB990905-4-C
MIT216335
MIT216336
MB990905-2-01
u-
MB990905l-01
llW616
SERVICE POINTS OF REASSEMBLYM27lJ6c6
2. PRESS FITTING OF OIL SEAL
(1) With the special tool, press fit the oil seal until it iswith the end of the gear carrier.
(2) Apply multipurpose grease to the oil seal lip. flush
3. INSTALLATION OF DRIVE PINION REAR BEARING OUTER RACE/A DRIVE PINION FRONT BEARING
OUTER RACE
Press-fit the drive pinion rear and front bearing outer races
into the gear carrier by using the special tool.
Caution
Be careful not to press in the outer race at an angle.
. ADJUSTMENT OF PINION HEIGHT
Adjust the drive pinion height by the following procedures: (I)
Install special tools and drive pinion front and rear
bearing inner races on the gear carrier in the sequence
shown in the illustration.
(2) Tighten the handle of the special tool until the standard value of drive pinion turning torque is obtained.
(3)
Ea;sure the drive pinion turning torque (without the oil
Standard value:
I I
Bearing BearingRotation torque
classification lubrication (starting friction torque)
Nm (in.lbs.)
I,;,r,used 1 EJi!x%;; 1/;;;;y;-;
NOTE(1) Gradually tighten the handle ?f the special tool while
checking the drive pinion turning torque.(2)Because the special tool cannot be turqed one tur?,
turn
it several times within the range that It
can be turned;
then, after fitting to the bearing, measure the rotation
torque.
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339-l
ACTIVE-ELECTRONIC
CONTROL
SUSPENSION
ACTIVE-ECS RELAY......................................141
ACTIVE-ECSSENSOR.................................. 138
AIRCOMPRESSOR.......................................125
AIR TUBE.......................................................133
CONTROLUNIT............................................ 140
HEIGHT SENSOR ..........................................
135
INDICATORASSEMBLY............................... 140
LATERALROD...............................................117
LOWER
ARM.................................................103
REAR
SUSPENSION ASSEMBLY................114
RESERVETANK............................................ 122
SERVICE ADJUSTMENT PROCEDURES.....86
Alarm Light Check.....................................87
Checking by On-board Diagnostic ..............88
FrontWheelAlignment .............................. 86
G sensor Output Voltage Check ...............96
High-pressure Switch
(High-pressure Tank Side)
Actuation Pressure Check
.......................... 94
Hub End Play Inspection ...........................86 M33AA-
Low-pressure Switch
(Low-pressure Tank Side)
Actuation
PressureCheck . . . . . . . . . . . . . . . . . . . . . . . . .95
Normal Vehicle Height Check and
Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . . . . . . . . . . . . .88
Rolling Diaphragm Check . . . . . . . . . . .._.............. 89
System Checking by Using Alarm
Light
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . . . . . . . . . . . . . . . . . . . . .87
System OperationCheck . . . . . . . . . . . . . . . . . . . . . . . . . . .90
Wheel Bearing Adjustment . . . . . . . . . .
.._........... 87
SHOCKABSORBER ASSEMBLY. . . . . . . . . . . . . . . . .110
SOLENOIDVALVEANDDRYER . . . . . . . . . . . . . . . . .127
SPECIAL TOOLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . . . .7
SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . . . .2
GeneralSpecifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
ServiceSpecifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . .3
TorqueSpecifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
STABILIZER BAR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . . . .106
STRUT ASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . .97
TORSION AXLE AND ARM
ASSEMBLY. . . . . . . . ..*.........................................119,
TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

33B-14 ACTIVE-ELECTRONIC CONTROL SUSPENSION - Troubleshooting
DiagnostictroubleMalfunctionVehicle condition
Probable causeAction
code No.
Damaged or disconnected
The alarm light illuminates,l Damaged or disconnect-
Troubleshoot
wiring, or a short-circuit, of and the attitude-control ed wiring, or a shorting hints
the exhaust valve actuation function and the vehicle- -circuit, of the exhaust
classified by
circuit (for vehicle-height height control function are valve coil (for vehicle
circuit
[20]
adjustment), or a
stopped. -height adjustment).
malfunction of an output The damping force is heldl Damaged or disconnect-
transistor within the ECU. to MEDIUM. ed wiring, or a short
-circuit, of the exhaust
45valve actuation circuit (for
vehicle-height
adjustment).
0 Disconnection of the connector of the exhaust
valve actuation circuit (for
vehicle-height
adjustment).
l ECU malfunction.
46
Damaged or disconnected The alarm light illuminates,l Damaged or disconnected Troubleshoot-
wiring, or a short-circuit, of and the attitude-control
wiring, or a short -circuit, ofing hints
the flow-rate switchover function and the
vehicle-the flow-rate switchoverclassified by
valve actuation circuit, or a height control function are
valve coil.circuit [21]
malfunction of an output
stopped.l Damaged or disconnected
transistor within the ECU. The damping force is held wiring, or a short-circuit, of
to MEDIUM. the flow-rate switchover
valve circuit harness.
l Disconnection of the
flow-rate switchover
valve circuit connector.
l ECU malfunction.
47
Damaged or disconnected The alarm light illuminates,l Damaged or disconnect- Troubleshoot-
wiring of the front or rear and the attitude-control ed wiring of the front or
ing hints
exhaust valve actuation function and the
vehicle-rear exhaust valve coil (for
classified by
circuit (for active control), or height control function are active control).
circuit
[22]
a malfunction of an output
stopped.0 Damaged or disconnect-
transistor within the ECU. The damping force is held ed wiring of the front or
to MEDIUM. rear exhaust valve circuit
(for active control).
l Disconnection of the connector of the front or
rear exhaust valve circuit
(for active control).
l ECU malfunction.
51
Damaged or disconnected The alarm light illuminates,0 Damaged or disconnected Troubleshoot-
wiring of the front or rear and the attitude-control wiring of the front or rear
ing hints
air-supply valve actuation function and the
vehicle-air-supply valve
coil. classified by
circuit, or a malfunction of height control function arel Damaged or disconnected circuit
[23],
an output transistor within
stopped. wiring of the front or rear1241
the ECU.
The damping force is held air-supply valve circuit
to MEDIUM. harness.
l Disconnection of the connector of the front or
rear air-supply valve circuit.
l ECU malfunction.
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ACTIVE-ELECTRONIC CONTROL SUSPENSION - Troubleshootina 33B-15
Diagnostic
trouble
code NoMalfunction Vehicle condition Probable causeAction
52
Damaged or disconnected
The alarm light illuminates, l Damaged or disconnected Troubleshoo
wiring of the left front or and the attitude-control wiring of the left front or
ing hints
right front valve actuation function and the vehicle- right front valve coil.
classified by
circuit, or a malfunction of height control function arel Damaged or disconnected circuit
[25]an output transistor within
stopped. wiring of the left front orthe ECU.The damping force is held
right front valve circuit
to MEDIUM. harness.
l Disconnection of the connector of the left front
or right front valve circuit.
l ECU malfunction.
53
Damaged or disconnected The alarm light illuminates,
wiring of the left rear or right l Damaged or disconnected Troubleshoot
and the attitude-control wiring of the left rear or
rear valve actuation circuit, ing hints
function and, the vehicle- right rear valve coil.
classified by
or a malfunction of an output height control function are
transistor within the ECU. l Damaged or disconnected circuit
[26]
stopped.
wiring of the left rear or
The damping force is held right rear valve circuit
to MEDIUM.
harness.
l Disconnection of the connector of the left rear
or right rear valve circuit.
l ECU malfunction.
54
55
Even though three mrnutes
The alarm light illuminates,0 Overloaded condition. Refer to
or more have passed for the and the attitude-control l Improper adjustment ofMalfunction
vehicle-height adjustments function and the vehicle- the front or rear
of the front and the rear, and Symptoms
height control function are vehicle-height sensor.
Chart [A] onthe pressure within thestopped.l Air-pressure line isP.33B-17.high-pressure
tank is
The damping force is held
sufficient (the high-pressure clogged.
to MEDIUM. l Malfunction of the front
switch is OFF), the strut unit or the rear shock
vehicle-height adjustments absorber unit air spring.
are not completed. l ECU malfunction.
Even though three minutes The alarm light illuminates,
l Compressor malfunction.Refer to
or more have passed for the and the attitude-control Damaged orMalfunction
vehicle-height adjustments function and the vehicle- disconnected wiring ofSymptoms
of the front and the rear, and height control function are
the harness between theChart
LB1 on
with insufficient pressure stopped. compressor relay and the
P.33B-17.
withtn the high-pressure tankThe damping force is held
compressor.
(the high-pressure
switch isto MEDIUM.
Malfunction of the air
iON), the vehicle-height compression of the
adjustments are not compressor.
completed, or the l Air leakage from the
compressor has operated
continuously for four high-pressure tank
minutes or longer. (non-airtight connection
with the low-pressure
tank).
l High-pressure switch is fused.
The return pump is Control functions are not Air leakage within the frontReplace the
continuously activated stopped (alarm lamp does (left or right) or rear (left orfront or rear
(repeatedly starts and stops not illuminate).
right) valve.solenoid
56erght times), even though
valve.
neither the attitude-control
function nor the
vehicle-height control
function has been initiated.
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ACTIVE-ELECTRONIC CONTROL SUSPENSION - Troubleshooting 33B-17
CHECKING ACCORDING TO CHARTS CLASSIFIED BY THE MALFUNCTION SYMPTOM
[A] DIAGNOSTIC TROUBLE CODE NO.54
No
Yes
b Excessive vehicle-height ad-justment
(overload) overload). time (due to -Unload the vehicle and turn* the ignition key to OFF; then
restart the engine and check
whether or not the system
functions normally.
Is the installation position of Nothe height sensor correct?
Yes Improper setting of the heightc sensor, or malfunction of the
height sensor. l Correct the installationcposition of the height sen-
sor, or adjust the vehicle
-height sensor rod.
l Check the height sensor. Refer to troubleshooting
hints [IO] and
[ll]classified by circuit.
Are the front strut and rear
NoMalfunction of the rolling
shock absorber unit air spr-* diaphragm.
Repair the rolling diaphragm,
or replace the shock absorber
ings in normal condition?Lunit.
(become folded)
Yes
Is the sound of operation
NoThe solenoid valves remain
heard from each solenoid closed, or there is air leakage
valve necessary for th
e
’ due to a malfunction of the
vehicle-height adjustment? valve seat.
Yes
Is the air pressure in the
vehicle-height adjustment
Nopressure line 950 kPa (135
psi) or higher?
I
Yes Damaged or disconnected
wiring of the high-pressure
switch, or incorrect vehicle
-height adjustment pressureline.
l Check the high-pressure switch circuit.
* Refer to troubleshooting hint [5] classified by circuit.
l Correct the clogging pro-
blem, or replace the air
tube.
Control unit malfunction.
[B] DIAGNOSTIC TROUBLE CODE NO.55
- No
Does the compressor func-
tion normally?
Yes Replace the control unit.c l Power is not supplied to
the compressor.Refer to troubleshooting
hint
[18] classified by cir-
cuit.
0 Improper compressor com- pression.
Is the air pressure in the
Novehicle-height adjustment
pressure line 760 kPa (108psi) or lower? High-pressure
switch
isRefer to troubleshooting hint
shorted____* [5] classified by circuit.
Yes Air leakage.
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ACTIVE-ELECTRONIC CONTROL SUSPENSION - Troubleshooting 33B-21
TROUBLESHOOTING HINTS CLASSIFIED ACCORDING TO CIRCUITS
Contents
No.
PIG-sensor circuitItem
paw
P.33B-22/IPI
Generator “L” terminal circuit
P.33B-24
[31Low-pressure switch circuitP.33B-26
I41Throttle-position sensor circuitP.33B-28
[51High-pressure switch circuit P.338-30
) [6] / ACTIVE-ECS power-supply circuit
I PI IACTIVE-ECS indicators circuit
1 P.33B-32 1
1

P.33B-34 1
/ P.33B-38 1I L81 IHeadlight switch circuit
1 [9] / Steering angular-velocity sensor circuit/ P.33B-40 1
[lOI /
I
Front-height sensor circuit( P:33B-42I
PIIRear-height sensor circuit
[I21Vehicle-speed sensor circuit
[13]Rear-pressure sensor circuit
[I41 Stop light switch circuit
[I51 Back-up switch circuit
P.33B-44
P.33B46
P.33B-48 P.338-50
P.33B-52
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[If31Door switch circuitP.33B-53
[17]Damping force switching actuator drive circuit
P.338-54
1181Compressor drive circuitP.33B-561
WI

I
I
Return pump drive circuit/ P.33B-58
ml /
I
Exhaust valve actuation circuit (for vehicle-height adjustment)/ P.33B-60
I PII /Flow-rate switchover valve actuation circuit/ P.33B-62 1
I WI /Front/rear exhaust valve activation circuit1 P.33B-64 I
( 1231 1Front air-supply valve activation circuit1 P.33B-66 1
1241Rear air-supply valve activation circuitP.33B-68
[25]Left front/right front valve activation circuitP.33B-70
[=ILeft rear/right rear valve activation circuitP.33B-72
[271ACTIVE-ECS-related diagnostic/service data output circuitP.33B-74

ACTIVE-ELECTRONIC CONTROL SUSPENSION - Troubleshooting 33B-33
Operation
When the ignition is switched ON, the ECS power relay is also switched ON, and power is supplied to
the system. At the same time, the ECU switches
ON the solenoid
valve power relay, and power is
supplied to the solenoid valve activation circuit. As a
result, system operation is possible.
Diagnostic
When problems such as damage or disconnection of the heavy-line circuit, or fusing of the contacts of
the solenoid valve power relay, etc. occur, the alarm When the ignition switch is switched OFF after driv-
ing, the three-minute OFF delay timer makes
vehicle-height adjustment (down only) possible for a period of three minutes, thus preventing the vehicle
height from increasing while passengers get out of
the vehicle, etc.
light illuminates, and control is as described in the
table below.
Diagnostic No. 42 Attitude control
Rolling control
onlv stoos.
Damping force
Vehicle-height Switch acceptance
control control
/ HIGHSPORTAUTOSOFT
Held at MEDIUM
Rolling control
Not acceptonlv stoos
Service data indication
CodeNo /Indication Display
16Indicates ON/OFF status of the
iqnition switch. 16: IGNITION SW. ON/OFF
ECU terminal voltage (when connector is connected)
valve power relay output
26
Solenoid valve power relay drivesignalWhen solenoid valve power relay is ON
When solenoid valve power relay is OFFB+
B+: Battery positive voltage
Checking the ACTIVE-ECS power source circuit (with the connector discon\
nected)
Terminal Connection destination or Measurement ’No.measured part Tester connection
Check condition
5Ignition switchi Voltage5-groundIgnition switch OFF
Ignition switch
OFF-O
N
8Solenoid valve power
Voltage8-groundTerminal 26 open.
relay
Terminal 26 groundedStandard
o
v
O+B+
ov
O-B+
10ECU back-up power
sourcei Voltage1 O-ground
TSB Revision/ ConstantlyB+
B+: Batten/ positive voltage

ACTIVE-ELECTRONIC CONTROL SUSPENSION - Troubleshooting 33B-43
Diagnostic
When a signal (error code) indicating an abnormal
condition (resulting from damage or disconnection
of the heavy-line circuit, or a malfunction of a photo-transistor, etc.) is input, the alarm light
illu-
minates and control is as described in the table
below.
Diagnostic No. Attitude control Damping force
Vehicle-height
~Switch acceptance
control control
HIGHSPORT 1AUTOSOFT
22
Control stopj Held at MEDIUM Control stop Not accept
Service data indication
Code No lndrcation
Indication example
22Current vehicle-height level (ERRORWhen 22:N1111when there is a malfunction)
normallndrcates
the ON or OFF status of lndtcates
the vehicle-height-Status of each photo-interruptor
level. 1: ON,O: OFF
each
photointerruptor.If mal-22; ERRORfunction
0010
Indicates that an error code isL Status of each photo-interruptor
beina output.l:ON.O:OFF
ECU terminal voltages (when connector is connected) Termrnal
NoCondition
Terminalvoltaae
25
54,5556.57Power source for sensor
Front vehicle-herght signal
When the ECU is activated
5V
When the photo-rnterruptors are ON
o
v
When the photo-interruptors are OFF
5V
1 36/ Sensor circuit ground I ConstantlvIo
v
I
Checking the front-height sensor circuit (with the connector disconnect\
ed)
Terminal
Connectron
destination cNomeasured part
:zFront-height sensor
power-supply crrcuit
22
56
57
Front-height sensor
Resistance
brMeasurement
Resistance 25-36Tester connection
54-36
55-36
56-36
57-36
t
Troubleshooting hints (mechanical malfunctions) Check condition
Standard
Contact the tester’s
(-1 probe to Contrnuity
terminal 25, and the ( + ) probe to(Theterminal 36.
rndrcator
Note fluctuates)
Even if the result is good here,
the sensor must not be judged
tcbe certainly good.
Contact the tester’s
(-1 probe to
terminal 25, and the (+ 1 probe to
terminal 36, and check to be sure
that there is continuity, leave the
connections as they are.
Connect the tester’s
(-1 probe to
each terminal of the wiring
harness connector, and the
(+ Jprobe to terminal 36
Separate the lever (of the height
sensor) from the rod, and slowly
nave the lever up and down.
No Continurty
IContinuity
Malfunction mode Malfunction probable cause
Malfunction
Note
Improper Because of the improper adjustment of the
-adjustment of the
front-height sensorfront-height sensor rod, a signal not
l When the engine is stopped and left as it is,
corresponding to the actual vehicle height is the height of onlythe front end decreases to
rodbeing sent to the ECU lower than the NORMAL vehicle height
l With the engrne running, the height of the front
end IS lower than the NORMAL vehicle
height
l With the engine running (AUTO mode and NORMALvehicle

hetght). the height of the front
end becomes higher than the NORMAL helght)
1 TSB RevisionI