Hyundai Sonata 1991 Shop Manual page 180

AUTOMATIC SPEED CONTROL (CRUISE)
TROUBLE SYMPTOM CHARTS
Trouble Symptom 1
ASC symptom is canceled when cancellation
not wanted.
Or, the ASC system cannot be set after an
automatic cancellation.
Y27EXOA
No
After the OCCurrence of the problem, was the
I
Can the ASC System be set now?
I
ignition switch and cruise main switch left ON?
I
Yes No
Yes
Set the ASC system and
Continue
to
Trouble
conduct a road test.
Symptom 2 (next page)
Did the problem reoccur?
Yes No (now normal)
With the cruise main switch ON and the Check whether or not. then, the vehicle was driven
engine running, check the diagnosis code.
on a steep slope, or the SET and RESUME control
switches were operated simultaneously. (The cause
is not clear under the present circumstances.)
27-61