Hyundai Sonata 1991 Shop Manual page 274

MPI SYSTEM
Check conditions
Test Probable cause of malfunction
Check points
specification (or action)
Motor position sen- (The compressor Air conditioner
800-1,800
o If
the engine speed does not
sor
clutch
must
be switch ON
increase when the
air conditioner
o Service data
activated when (900 rpm)
switch is switched from OFF to ON,
o Item No.15
the
air
condi-
check the DC motor drive circuit
tioner switch is
o Check the air conditioner system
switched ON.)
Air conditioner 900-1,900 o Check the inhibitor switch and the
switch: ON
signal circuit
Shift lever: "D"
range (700
rpm)
Crank signal
o Ignition switch: Engine stopping OFF
o Ignition switch-ST signal
circuit
o Service data
ON
check
o Item No.18
Engine cranking ON
o Ignition switch check
Engine coolant tem- o Ignition switch: Engine coolant
Temperature
o Engine coolant temperature sensor
perature sensor
ON, or engine
temperature
0C (OF)
or related circuitry malfunction
o Service data
running °C (OF)
o Item No.21
-20 (-4)
-20 (-4)
o
(32)
0(32)
20 (68)
20 (68)
40 (104)
40 (104)
80 (176) 80 (176)
Crank angle sensor o Engine: idling
Engine coolant
Idling rpm o If the idling speed suddenly becomes
o Service data
(Check with the temperature
greater, a malfunction of the crank
o Item No.22
ignition switch
0C (OF)
angle sensor or improper contact of
ON.)
-20 (-4) 1,500-1,700
the connector is probable
0(32)
1,350-1,550
20 (68) 1,200-1 ,400
40 (104)
900-1,100
80 (176)
650-850
31-49