1989 MITSUBISHI GALANT height

ACTIVE-ELECTRONIC CONTROL SUSPENSION - Specifications33B-5
ItemsNmft.lbs.
Shock absorber assemblyAir tube to shock absorber
Shock absorber upper mounting nut
Shock absorber lower mounting nut
Rear height sensor mounting bolt
Actuator bracket mounting nut
Piston rod tightening nut
Rear suspension assembly Brake tube bracket mounting bolt
Rear brake assembly mounting bolt
Dust shield mounting bolt
Flange nut
8-106-
7
40-5029-36
80-10058-72
17-26 12-19
45-55
33-40
45-5533-40
Rear speed sensor mounting bolt
Air tube to shock absorber
Shock absorber upper mounting nut
Lateral rod mounting nut (body side)
Trailing arm mounting bolt
Rear height sensor rod mounting bolt -ateral
rod 17~26
12-19
50-6036-43
9-1
4
7-10
200-260144-188
9-1
4
7-10
8-106-

7
40-5029-36
80-10058-72
100-12072-87
17-26 12-19
Lateral rod mounting nut (body side)
Lateral rod mounting nut (axle beam side)
Rear height sensor rod mounting bolt rorsion axle and arm assembly
Brake tube bracket mounting bolt
Rear brake assembly mounting bolt
Dust shield mounting bolt
Flange nut
80-100
100-120
17-26 58-72
72-87
12-19
Rear speed sensor mounting bolt *A.B.S.>
Shock absorber lower mounting nut Rear height sensor rod mounting bolt
Lateral rod mounting nut (axle beam side)
Trailing arm mounting bolt
deserve tank 17-26
50-60
3-14
200-260
3-14
30- 100
17-26
100-120
100-120
12-19
36-43
7-10
144-188
7-10
58-72
12-19
72-87
72-87
Tank holder to body
Air tube to reserve tank
7-10
s-7
TSB Revision
NOTE “A.B.S.:
Anti-lock braking system

33B-6ACTIVE-ELECTRONIC CONTROL SUSPENSION - Specifications
Items
Air compressor Air compressor mounting bolt
Arr tube to air compressor
Compressor mounting bracket to transaxle
Solenoid valve and dryer Front solenoid valve bracket to body
Front solenoid valve to bracket
Air tube to dryer Flow control solenoid valve to body
Rear solenoid valve bracket mounting nut
Rear solenoid valve to bracket
Air tube
Joint
ieight sensor
Front height sensor rod to sensor
Front height sensor rod to lower arm
Front height sensor rod jam nut
Protector to body
Rear height sensor to body
Rear height sensor rod to sensor
Rear height sensor rod to bracket (1989 models)
Rear height sensor rod to bracket (From 1990 models)
Rear height sensor bracket (A) to bracket
(B)
Front height sensor rod jam nut
; sensor
G sensor bracket to body
Nmftlbs.
4-
6
3-4
8-106-
7
9-14
7-10
7-l 15-
8
7-11 5-8
8-106-
7
7-l 15-

8
4-6 3-4
7-l 15-
8
8-106-

7
17-26 12-19
17-26 12-19
9-14
7-10
9-1
4
7-10
9-1

4
7-10
4.8-7.2
4-
5
17-26 12-19
4.8-7.2 4-5
9-14
7-10
9-1
4
7-10
4-

6
3-4
1 TSB Revision

33B-10 ACTIVE-ELECTRONIC CONTROL SUSPENSION - Troubleshooting
Ifagnosticervice
- ata 0utDut
Diagnostic service
data switching input
Simulated
vehicle-speed input
Ground
1 Cl nno,
TROUBLESHOOTINGhw3EAAtm
TROUBLESHOOTING POINTS
REGARDING THE DIAGNOSTIC FUNCTION
For the ACTIVE-Electronic Control Suspension (ACTIVE-ECS),
the electronic control unit has been provided with the following
functions in order to make checking of the electronic-control system
easier.
(1) Diagnostic trouble code output
(2) Service data output(3) Actuator test
Note that all of the above can be checked by using the
scan tool.
Also note that the diagnostic trouble codes can be checkedby using the voltmeter.
NOTE
For information concerning testing procedures by using the
scan tool, refer to
P.33B-11.
CHECKING THE ELECTRONIC CONTROL UNIT (ECU) SIG- NAL CIRCUIT
(1) The circuit tester used must be highly sensitive and highly precise, with internal batteries of
3V or more.
(2) Care should be taken about the outflow of current from the tester when checking for continuity of terminals and the
power-supply circuitry for the photo sensors (front and rearheight sensors and steering angle velocity sensor). Use of
the
x10 range is preferable, but the xl range can be used
if the indicator does not move sufficiently to the right.
(3) The resistance values noted as standard values are simply reference values. If there is continuity, the part can be
considered to be OK.
(4) If a power relay or solenoid valve is to be activated, first check carefully to be sure that there is no damaged or
disconnected wiring or a short-circuit. Also do not make
unnecessary connections so that wiring contacts the body.
Take particular care to be sure that the wiring of battery power-supply connections is secure.
TSB Revision

ACTIVE-ELECTRONIC CONTROL SUSPENSION - Troubleshooting 33B-11
CHECKING BY USING THE SCAN TOOL
1. DIAGNOSTIC TROUBLE CODE OUTPUT
TROUBLESHOOTING CHART
DiagnostictroubleMalfunctionVehicle conditioncode No.Probable causeAction
0Normal---
Damaged or disconnected
Alarm light illuminates;0 Improper installation Troubleshoof
wiring or short-circuit of Gamong attitude-control of G sensor.
sensor input circuit, or Ging hints
modes, only rolling control
sensor malfunction. l
G sensor internal wiring
classified by
stops. damaged or disconnected. circuit
[I]
“11(Others operate normally.)l Damaged or disconnected
wiring or short-circuit of
G
sensor circurt.
l Connector of
G sensor
circuit disconnected.
0 Malfunction of ECU.
W
ith the ignition key at the
The charging warning light
ON position and the vehicle illuminates, and,
0 Insufficient generator “L”Troubleshoot
speed at 40 km/h (25 mph) furthermore, the system terminal output voltage
ing hints
or higher, the output does not function when the (malfunction of the
classified by
charging system). circuit
[2]
voltage of the generator ‘I”vehicle is stopped (vehicle0 Harness short-circuit
terminal is approximately speed of 3 km/h (2 mph) or
5V or lower
lower). between the generator“L” terminal and the ECU.“12
NOTEl ECU malfunction.
The alarm light does not illuminate, and,
furthermore, there is no
detection of harness
damage or disconnection
between the generator “L”
terminal and the ECU.
The low-pressure switch is The alarm light illuminates,
l Low-pressure switch is Troubleshoot
not switched OFF even and only the attitude-control
fused.
though the attitude-control ing hints
function stops. (Other l Damaged or disconnected classified by
function is performed 30 functions are normal.) circuit
131
13times. The return pump is wiring, or short-circuit, of
the low-pressure switch
activated frequently. circuit harness.
0 The connector of the
low-pressure switch
circuit is disconnected.
l Air leakage from the low-pressure tank
(including tubing).
l ECU malfunction.
“21
Damaged or disconnected The alarm light illuminates,l Steering angular-velocity Troubleshoot-
wiring of the steering and the attitude-control sensor malfunction.
angular-velocity sensor ing hints
function stops. The
input circuit, or a l Damaged or disconnected classified by
damping force is held to wiring of the steeringcircuit
191malfunction of the steenng
MEDIUM, and the vehicle
angular-velocity sensor. angular-velocity sensor
height is held to NORMAL circuit harness.
l Disconnection of the connector of the steering
angular-velocity sensor
circuit.
l ECU malfunction.
TSB Revision

33B-12 ACTIVE-ELECTRONIC CONTROL SUSPENSION - Troubleshooting
Diagnostic
troubleMalfunction Vehicle condition
Probable causeAction
code No.
An abnormal signal (a signal
The alarm light illuminates, l Front height sensor
Troubleshoot
unlike any normal
srgnaland the attitude-control malfunction.
ing hints
such as an error code, etc.) function and the
vehicle-l Damaged or disconnected classified by
is input from the front height control function are wiring, or a short-circuit, of circuit [IO]
height sensor; or, a stopped. The damping the front height sensor
“22 malfunction of the
force is held to MEDIUM. circuit.
vehicle-height
NOTEl Disconnection of the
discrimination circuit within
the ECU.Note that 32 seconds are connector of the front
required to determine that height sensor circuit.
there is a malfunction. l ECU malfunction.
“23 An abnormal signal is input
The alarm light illuminates,
l Rear height sensorTroubleshoot
from the rear height sensor; and the attitude-control malfunction.
ing hints
or, a malfunction of the function and the vehicle
l Damaged or disconnected classified byvehicle-height
height control function are
wiring, or a short-circuit, of circuit
[I 11
discrimination circuit within
stopped. The damping the rear height sensor
the ECU.force is held to MEDIUM circuit.
NOTEl Disconnection of the
Note that 32 seconds are connector of the rear
required to determine that
height sensor circuit.
there is a malfunction. l ECU malfunction
There is damaged or The alarm light illuminates, l Malfunction of the Troubleshoot-
disconnected wiring, or a and the attitude-control vehicle-speed sensor
ing hints
short-circuit, of the function stops. The (damaged or disconnected classified by
vehicle-speed sensor Input
damping force
IS held to wiring, or a short-circuit).
circuit [ 121
circuit.MEDIUM, and the vehicle l Damaged or disconnected
“24 (The throttle is open 30% or
height is held to NORMAL. wiring, or a short-circuit, of
more, and the output of the the vehicle-speed sensor
generator “L”
terminal is circuit.
HIGH level, but even so the l The connector of the
input of the vehicle-speed vehicle-speed sensor
pulses is not
30*’ seconds circuit is disconnected.
or longer.)l ECU malfunction.
There is damaged or The attitude-control
l Rear pressure sensorTroubleshoot.
disconnected wiring of function and the
vehicle-malfunction.
ing hints
/ the rear pressure height control function arel Damaged or disconnected classified by
sensor input circuit. stopped. wiring, or a short-circuit, of
circuit
[I31
(The rear internalThe damping force is held the rear pressure sensor
25pressure is abnormally
to MEDIUM. circuit.
high.)
NOTEl Disconnection of the
This code is also output connector of the rear
during driving in an pressure sensor circuit.
overloaded condition. l ECU malfunction
NOTE+1: 1989 models
From 1990 models: 60
TSB Revision

ACTIVE-ELECTRONIC CONTROL SUSPENSION - Troubleshooting 33B-13
Diagnostic
trouble
zode No.MalfunctionVehicle condition Probable causeAction
Damaged or disconnected The alarm light illuminates,
l All connectors of theTroubleshoot
wiring of the damping force and the attitude-control
damping-force switchinging hints
switching actuator (step function and the damping-
actuator (step motor classified by
motor type) or of the force control function are
type) and the actuatorcircuit
[ 171
actuator circuit, or a
stopped.
circuit are disconnected.
malfunction of an output The vehicle height is held to
l Damaged or disconnected41transistor within the ECU. NORMAL.
wiring, or a short-circuit, of
the damping-force
switching actuator (step
motor type) and the
harness of the ECU part of
the actuator circutt.
l ECU malfunction.
There is damaged or The alarm light illuminates,
l The solenoid valve power Troubleshoot-
disconnected wiring, or a and the attitude-control
short-circuit, of the solenoid source relay contacts are
ing hints
function and the
vehicle-fused. classified by
valve power source relay height control function are
circuit. l Damaged or disconnected circuit
(71stopped.
wiring of the solenoid
The damping force is held valve power source relay
to MEDIUM. coil.
42
l Damaged or disconnected
wiring, or a short-circuit, of
the solenoid valve power source relay circuit.
l Disconnection of the connector of the solenoid
valve power source relay
circuit.
l ECU malfunction.
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 compressor relay function and the
vehicle-the compressor relay coil.classified by
circuit, or a malfunction of height control function are
l Damaged or disconnectedcircuit [I81an output transistor within
stopped.
43
the ECU.wiring, or a short-circuit, of
The damping force is held the compressor relay
to MEDIUM.
circuit harness.
l Disconnection of the
compressor relay circuit
connector.
l ECU malfunction.
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 return pump relay function and the
vehicle-the return pump relay coil.classified by
circuit, or a malfunction of height control function are
l Damaged or disconnectedcircuit [I91an output transistor withinstopped.
the ECU.The damping force is heldwrring, or a short-circuit, of44
the return pump relay
to MEDIUM. circuit harness.
l Disconnection of the return pump relay circuit
connector.
l ECU malfunction.
TSB Revision

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.
TSB Revision

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.
TSB Revision