Mitsubishi 1989 Galant, Service Manual

Page: 982 / 1273

ACTIVE-ELECTRONIC CONTROL SUSPENSION Troubleshooting
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
minates and control is as described in the table
below.
Diagnostic No. Attitude control
Damping force V e h i c l e - h e i g h t
Switch acceptance
control control
HIGH
SPORT AUTO
SOFT
22
Control stop Held at MEDIUM
Control stop Not accept
Service data indication
Code No
Indication example
22 Current vehicle-height level (ERROR When
1111
when there is a malfunction) normal
the ON or OFF status of
the vehicle-height of each photo-interruptor
level. 1: OFF
each
If
22; ERROR
function
Indicates that an error code is Status of each photo-interruptor
beina output.
ECU terminal voltages (when connector is connected)
No
Condition
Terminal
25
56.57
Power source for sensor
Front signal
When the ECU is activated
When the are ON o v
When the photo-interruptors are OFF
36
Sensor circuit ground
I Constantlv
I
o v
I
Checking the front-height sensor circuit (with the connector disconnected)
Terminal destination
No measured part
Front-height sensor
power-supply
56
57
Front-height sensor Resistance
Measurement
Resistance
25-36
Tester connection
54-36
55-36
56-36
57-36
Troubleshooting hints (mechanical malfunctions)
Check condition Standard
Contact the tester’s probe to
terminal 25, and the probe to
(The
terminal 36.
Note fluctuates)
Even if the result is good here,
the sensor must not be judged
be certainly good.
Contact the tester’s probe to
terminal 25, and the probe to
terminal 36, and check to be sure
that there is continuity, leave the
connections as they are.
Connect the tester’s
probe to
each terminal of the wiring
harness connector, and the
probe to terminal 36
Separate the lever (of the height
sensor) from the rod, and
slowly
the lever up and down.
No
I
Continuity
Malfunction
mode
Malfunction probable cause Malfunction
Note
Improper Because of the improper adjustment of the
adjustment of the
front-height sensor front-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 front end decreases to
rod
being sent to the ECU
lower than the NORMAL vehicle height
l
With the running, the height of the front
end
IS
lower than the NORMAL
l
With the engine running (AUTO mode and
the height of the front
end becomes higher than the NORMAL
TSB Revision I