Mitsubishi Stealth 1994 Import Service Manual page 456

MULTIPORT FUEL INJECTION
trouble
code No.
22 Crankshaft
position
sensor
23 Camshaft
position
sensor
24 Vehicle speed
sensor
25 Barometric
pressure
sensor
31 Knock
sensor
<DOHC>
36 Ignition timing
adjustment
signal <DOHC> to ground
39 Heated oxygen
sensor <Turbo
other than
California
model>
Right bank
heated oxygen
sensor (front)
<California>
Injector
41
Description
(1 )Cranking the engine
for more than four
seconds does not
cause the crankshaft
position sensor signal
voltage to change
(go high or low).
(2)Abnormal crankshaft
position sensor signal
<DOHC>
(1 )Engine is running,
but TDC sensor signal
voltage does not
change (get high/low)
for 4 seconds.
(2)TDC sensor signal
pattern is abnormal.
<DOHC>
With the engine in
accelerated operation
at an engine speed of
over 3,000 rpm, the
vehicle speed sensor
signal voltage does not
change (go high or low).
(1) Barometric pressure
sensor signal voltage
is above 4.5V for
4 seconds.
(2)Barometric pressure
sensor signal voltage
is below 0.2V
for 4 seconds.
Abnormal knock
sensor signal voltage
Ignition timing adjustment (1) Ignition timing adjustment signal
signal line short-circuited
Air-fuel ratio closed loop
control is in effect but
heated oxygen sensor
signal voltage does not
change (air-fuel mixture
lean/rich).
Injector is not driven
for more than four
consecutive seconds
during engine cranking
or idling operation.
Major cause
(1) Defective crank angle sensor
(2) Open or short circuit in crank-
shaft position sensor circuit, or
connector in loose contact
(3) Defective camshaft position
sensor, or connector in loose
contact
(4) Defective engine control module
(1) Defective camshaft position
sensor
(2) Open or short circuit in camshaft
position sensor circuit, or
connector in loose contact
(3) Defective crankshaft position
sensor, or connector in loose
contact
(4) Defective engine control module
(1) Defective vehicle speed sensor
(2) Open or short circuit in vehicle
speed sensor circuit, or
connector in loose contact
(3) Defective engine control module might stall.
pressure sensor
(2) Open or short circuit in baro-
metric pressure sensor circuit,
or connector in loose contact
(3) Defective engine control module
(1) Defective knock sensor
(2) Open or short circuit in
knock sensor circuit, or
connector in loose contact
(3) Defective engine control module
line short-circuited to ground
(2) Defective engine control module
(2) Open or short circuit in heated
oxygen sensor circuit, or
connector in loose contact
(3) Improper fuel pressure
(4) Defective injector
(5) Air drawn in through gasket
clearance, etc.
(6) Defective engine control module
(2) Open or short circuit in injector
circuit, or connector in loose
contact
(3) Defective engine control module
Remarks
(Symptoms, etc.)
Engine stalls.
l
@ Engine cannot be
started.
Engine stalls.*
l
When the vehicle is
stopped with the
engine in decelerated
operation, the engine
Unstable idling*
l
Poor startability"
l
Poor acceleration
l
Overheated engine
l
Poor exhaust
l
emission purifying
performance*
Poor exhaust
l
emission purifying
performance*
Poor startability
l
Unstable idling
l
Poor idling
l
Poor startability
l