Hyundai Sonata 1991 Shop Manual page 271

MPI SYSTEM
Check conditions
Test
Probable causes of malfunction
Check points
specification
(or action)
Injectors
o Engine cranking
Listen for
Operation o Injector malfunction.
o Service data
operation sounds of the
o Improper contact of the connector
o Item No.41
sounds.
injectors can and control relay contacts.
be heard.
Engine
Injector o Malfunction of the engine coolant
coolant
activation temperature sensor
temperature time
*2
o Malfunction of the ignition
[OC (OF)]
(msec.)
switch-ST.
0(32)*'
Approx. 21
20 (68)
Approx. 43
.
80 (176)
Approx. 10
NOTE
*': When the engine coolant temperature is
(j°C
(32°F). injectors inject simultaneously at 4 cylinders.
*2: Injector activation times are indicated at a battery voltage of 11 V and a cranking speed of 250 rpm or
lower.
31-46