Mitsubishi 1989 Galant, Service Manual

Page: 988 / 1273

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