Mitsubishi 1989-1993 GALANT Service Manual page 1000

ACTIVE-ELECTRONIC CONTROL SUSPENSION - Troubleshooting
Operation
The exhaust valve for adjustment of the vehicle
height is installed at the compressor assembly.
This valve is switched ON only when a downward
Diagnostic
If there is damage or disconnection of the heavy-line
circuit, or a short-circuit, or a malfunction of the out-
put transistor within the ECU, the alarm light
Diagnostic No.
Attitude control
45 Rolling control
only stops
Actuator compulsory activation
The exhaust valve for vehicle-height adjustment is
activated by the following.
Code No Applicable operation
07 Vehicle height downward adjustment
ECU terminal voltages (when connector is connected)
Terminal
Signal
No.
Exhaust valve (for vehicle-height
31
adjustment) activation srgnal
Checking the exhaust valve (for vehicle-height adjustment) activation circuit (with the connector discon-
nected)
measured part
No
Exhaust valve (for
31
vehicle-height
adjustment)
Troubleshooting hints (mechanical malfunctions)
Malfunction
mode
Stuck in the OFF
(closed) position stuck in the OFF (closed) due to corrosion,
freezing, etc. caused by moisture penetration.
Stuck rn the ON Air discharge cannot be stopped because the
(open) positlon valve is stuck in the ON (open) due to corrosion,
Valve seat IS worn.
seat
Damping force
control
Held at
MEDIUM
When the exhaust valve (for vehicle-height adjustment) is ON
When the exhaust valve (for vehicle-height adjustment)
(closed)
During fail-safe (for solenoid valve power source relay swatch
OFF)
Tester connection
Resistance
Malfunction probable cause
Revision
TSB
adjustment of the vehicle height is being made; it
functions to discharge air (from the air springs) into
the atmosphere.
illuminates and control is as described in the table
below.
Vehicle-height
control
HIGH
Rolling control
only stops.
Condition
Check condition
Constantly
Malfunction
Vehicle height doesn't decrease.
Vehicle height doesn't increase.
l
Compressor doesn't stop.
l
Vehicle herght doesn't increase.
l
Compressor doesn't stoo.
l
Switch acceptance
SPORT AUTO SOFT
Not accept
Terminal
voltage
OFF o v
o v
Standard
Approx.
Note
Diagnostic
trouble code
Diagnostic
code
trouble
Diagnostic trouble
code No.55 is output