Mitsubishi 1989 Galant, Service Manual

Page: 478 / 1273

AUTO-CRUISE CONTROL SYSTEM Troubleshooting
Probable cause Check chart No. Remedy
l
The set vehicle speed varies
Malfunction of the
Repair the vehicle
greatly upward or downward.
speed sensor sensor system, or
l
“Hunching” (repeated alternating place the part.
acceleration and deceleration) oc-
curs after setting is made.
Malfunction of the spee-
dometer cable or spee-
dometer drive gear
Actuator circuit poor
contact
Malfunction of the ac-
tuator
Repair the actuator
or replace the part.
Malfunction of the ECU Replace the ECU.
The auto-cruise control system is not
Damaged or discon-
If the input check code Repair the harness or re
canceled when the brake pedals is
wiring of the stop
indicates a
place the stop light
depressed. light switch input circuit; function. switch.
brake switch (for
cruise control) malfunc-
tion (short-circuit)
Actuator drive circuit
Repair the harness or re
short-circuit.
place the actuator.
Malfunction of the ECU Replace the ECU.
auto-cruise control system is not
Damaged or discon-
If the input check code Repair the harness, or
when the clutch pedal is wiring of clutch indicates a repair or replace the
(vehicles with a manual pedal position switch function. clutch pedal position
ransaxle)
input circuit switch.
It is canceled, however, when the
pedal is depressed.) Clutch pedal position
switch improper installa-
tion (won’t switch ON)
Malfunction of the ECU Replace the ECU.
auto-cruise control system is not
Damaged or discon-
If the input check code Repair the harness, or
when the shift lever is wiring of park/ indicates a repair or replace the
noved to the position. (vehicles neutral position switch function.
park/neutral position
vith an automatic transaxle) input circuit switch.
is canceled, however, when the
pedal is depressed.) Improper adjustment of
park/neutral position
switch
Malfunction of the ECU Replace the ECU.
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