Mitsubishi 1989-1993 GALANT Service Manual page 988

ACTIVE-ELECTRONIC CONTROL SUSPENSION - Troubleshooting
Diagnostic
If, because of damage or disconnection of the heavy-line
circuit, or a malfunction of the rear-pressure sensor, etc.,
a htgher than normal value
air springs is indicated continuously, the alarm light
illuminates*, and control is as described in the table
Diagnostic No. Attitude control
25 Control stop
1990, 1991, 1992, HIGH-AUTO change possible. If the above diagnostic number is detected, the damping force that is
1993 models: the base of the SOFT mode and AUTO mode changes to the MEDIUM damping force.
Service data indication
Indication
25 Rear-pressure sensor output
voltage
Front seats: 2 persons
ECU terminal voltages (when connector is connected)
25 Power supply for sensor
37 Rear air spring pressure signal
Sensor circuit ground
35
Checking the rear-pressure sensor (with the connector disconnected)
Terminal Connection destination or Measurement
No measured part
Rear-pressure sensor
All resistances
37 Rear-pressure sensor
output
Troubleshooting hints (mechanical malfunctions)
Malfunction
mode
Because of a short-circurt of the harness, etc ,
Harness
short-circuit no correction of the air-supply and exhaust time
can be made to compensate for a loaded
Wear, damage, etc. of the O-ring
of the internal pressure of the
Damping force
control
Normal
Only the vehicle-height increase
operation
control function stops.
Fluctuates within a range of 0.5V to 4.5V
when the body is shaken from side to side.
Condition
When HIGH vehicle height
When NORMAL vehicle height
When LOW vehicle height
When the ECU is activated
Low rear air spring pressure
High rear air spring pressure
When wiring
Constantly
Tester connection
Resistance 25-35
Resistance 37-35
Malfunction probable cause
TSB Revision
below. Note, however, this diagnostic signal is given if
there is an overload.
l
: 1989 models
The alarm light does not illuminate for 1990, 1991,
1992, 1993 models.
Vehicle-height
control
HIGH
Not
accept
value
Standard
Condition
damaged or disconnected
IS
Check condition
Constantly
Change should be smooth (according
to the air pressure applied to the rear
-pressure sensor) within the standard
value range shown at the right
Malfunction
Insufficient control of the attitude, resulting in a
feeling of incompatibility
Switch acceptance
Accept
Display
25; RR. PRESS. SNSR. 2.45V
Reference value
Terminal
voltage
I
o v
Standard
Approx.
5 kll
Note