ACTIVE-ELECTRONIC CONTROL SUSPENSION Troubleshooting
Operation
The damping force switching actuator is the step
motor. That allows the control rod of each shock
at one of four levels (HARD, MEDIUM, AUTO-SOFT
or SOFT).
absorber to rotate, thus selecting the damping force
Diagnostic
If there is damage or disconnection of the heavy-line
circuit, the alarm light illuminates, and control is as
described in the table below. (Because the
tuators are connected in parallel, there can be no
detection if wiring damage or disconnection occurs
at the final circuit.)
Diagnostic No.
Attitude control
41
Control stop
Actuator compulsory activation
force
control
Control stop
Vehicle-height
control
Held at NORMAL
HIGH
Switch acceptance
SPORT
AUTO
Not accept
SOFT
Code No.
operatron
of activation
01
SOFT
force
The
force is compulsorily
to SOFT: there is a return to the
damping force three seconds thereafter
02
AUTO-SOFT damping force
The damping force is
switched to AUTO-SOFT; there is a return to
the
damping force three seconds thereafter
03
MEDIUM damping force
The damping force is compulsorily switched to MEDIUM; there is a return to the
damping force three seconds thereafter
04
HARD
force
The damping force
IS
compulsorily
to HARD; there
IS
a return to the
damping force three seconds thereafter
ECU terminal voltages (when connector is connected)
No
Condition
voltage
1
Damping force
actuator
signal
When the damping force
actuator stopped
Phase A
2
When the damping force switching actuator is activated
Damping force
actuator
activation signal
Phase
When wiring is damaged or
6
force
actuator
When the damping force switching actuator
IS
stopped
Phase
7
When the damping force switching actuator is activated
Damping force switching actuator
0
pulse
activation signal
Phase
When wiring is damaged or disconnected
o v
Battery positive
Checking the damping force switching actuator drive circuit (with the connector disconnected)
TSB Revision
Terminal Connection
or
No
measured part
Tester connection
Check
Standard
Damping force switching Resistance
Four coils that have a constant
actuator (step
Approx
resistance of 6.4
ohms are
connected in parallel (front and rear)
2
Damping force
Resistance
2-7
Four coils that have a constant
7
actuator (step motor)
Approx.
resistance of 6.4 0.1 ohms are
connected in parallel (front and rear).
Summary of Contents for 1989 Galant
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