Mitsubishi 1989 Galant, Service Manual

Page: 952 / 1273

ACTIVE-ELECTRONIC CONTROL SUSPENSION Troubleshooting
Diagnostic
trouble
No.
Malfunction Vehicle condition Probable cause Action
Damaged or disconnected The alarm light illuminates,
l
All connectors of the
Troubleshoot
wiring of the damping force
and the attitude-control
damping-force switching
ing hints
switching actuator (step function and the
actuator (step motor
classified by
motor type) or of the force control function are
type) and the actuator
circuit
actuator circuit, or a
stopped.
circuit are disconnected.
malfunction of an output
The vehicle height is held to
l Damaged or disconnected
41
transistor within the ECU.
NORMAL.
wiring, or a short-circuit, of
the damping-force
switching actuator (step
motor type) and the
harness of the ECU part of
the actuator
l
ECU malfunction.
There is damaged or The alarm light illuminates,
l
The solenoid valve power
disconnected wiring, or a and the attitude-control
short-circuit, of the solenoid
source relay contacts are
ing hints
function and the
fused. classified by
valve power source relay height control function are
circuit.
l Damaged or disconnected circuit
stopped.
wiring of the solenoid
The damping force is held
valve power source relay
to MEDIUM.
coil.
42
l
Damaged or disconnected
wiring, or a short-circuit, of
the solenoid valve power
source relay circuit.
l Disconnection of the
connector of the solenoid
valve power source relay
circuit.
l ECU malfunction.
Damaged or disconnected
The alarm light illuminates,
l Damaged or disconnected
wiring, or a short-circuit, of
and the attitude-control wiring, or a of
ing hints
the compressor relay
function and the the compressor relay coil.
classified by
circuit, or a malfunction of height control function are
l
Damaged or disconnected circuit
an output transistor within
stopped.
43
the ECU.
wiring, or a short-circuit, of
The damping force is held
the compressor relay
to MEDIUM. circuit harness.
l Disconnection of the
compressor relay circuit
connector.
l ECU malfunction.
Damaged or disconnected The alarm light illuminates,
l Damaged or disconnected
wiring, or a short-circuit, of and the attitude-control
wiring, or a short-circuit, of ing hints
the return pump relay function and the
the return pump relay coil.
classified by
circuit, or a malfunction of height control function are
l Damaged or disconnected
circuit
an output transistor within stopped.
the ECU. The damping force is held
or a short-circuit, of
44
the return pump relay
to MEDIUM.
circuit harness.
l Disconnection of the
return pump relay circuit
connector.
l ECU malfunction.
TSB Revision