Mitsubishi 1989-1993 GALANT Service Manual page 994

ACTIVE-ELECTRONIC CONTROL SUSPENSION - Troubleshooting
Operation
The damping force switching actuator is the step
motor. That allows the control rod of each shock
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 ac-
Diagnostic No.
Attitude control
41 Control stop
Actuator compulsory activation
Code No.
01 SOFT damplng force
02
AUTO-SOFT damping force
03
MEDIUM damping force
04 HARD damplng force
ECU terminal voltages (when connector is connected)
No
1 Damping force swrtchlng actuator
Phase A
2 Damping force switching actuator
activation signal
Phase B
6
Phase C
7
Damping force switching actuator
activation signal
Phase D
Checking the damping force switching actuator drive circuit (with the connector disconnected)
Terminal Connection destination or Measurement
No measured part
Damping force switching Resistance
actuator (step motor)
2
Damping force swltchlng Resistance
7
actuator (step motor)
at one of four levels (HARD, MEDIUM, AUTO-SOFT
or SOFT).
tuators are connected in parallel, there can be no
detection if wiring damage or disconnection occurs
at the final circuit.)
Vehicle-height
control
Control stop Held at NORMAL
The damplng force is compulsorily swltched to SOFT: there is a return to the
The damping force is compulsorily switched to AUTO-SOFT; there is a return to
the onginal damping force three seconds thereafter
The damping force is compulsorily switched to MEDIUM; there is a return to the
The damping force compulsorily switched to HARD; there
IS
When the damping force switching actuator IS stopped
When wiring is damaged or dlsconnected
When the damping force switching actuator
When wiring is damaged or disconnected
Tester connection
2-7
TSB Revision
Switch acceptance
control
HIGH
SPORT
Condition
stopped
IS
Check condltlon
Four coils that have a constant
resistance of 6.4 i-O.1 ohms are
connected in parallel (front and rear)
Four coils that have a constant
resistance of 6.4 t 0.1 ohms are
connected in parallel (front and rear).
AUTO SOFT
Not accept
a return to the
IS
voltage
pulse
o v
Standard
Approx
Approx.