Mitsubishi 3000GT Service Manual page 130

MULTIPORT FUEL INJECTION - Troubleshootina
Fault ID
23 Camshaft Position Sensor
Background
When the engine is running, the camshaft position sensor outputs
l
a pulse signal.
is input.
of the camshaft position sensor.
Range of Check, Set Conditions
Range of check
Ignition switch : ON
l
Set conditions
Sensor output voltage does not change for 4 seconds (no pulse
signal input).
Range of check
Ignition switch : ON
l
Engine is not cranking.
l
Set conditions
Regular signal patterns for cylinder discrimination from the
crankshaft position sensor signal and the camshaft position
sensor signal are not input 20 times in a 10 seconds period.
ne control module checks whether the pulse signal
Range of Check
Ignition switch : ON
l
Excluding 60 seconds after the ignition switch is turned to ON
l
or immediately after the engine starts.
Closed throttle position switch : OFF
l
Engine speed is 3,000 r/min or more.
l
Driving under high engine load conditions.
l
Set Conditions
ut voltage does not change for 4 seconds (no pulse
Title
Limp-in
(a) Injects fuel into all
(b) Cuts off the fuel
TSB Revision
Effect Probable causes
Camshaft position
l
failed.
Open or shorted camshaft
cylinders simulta- l
position sensor circuit, or loose
neously. (After the
connector.
ignition switch is
Engine control module failed.
l
turned to ON, the
No.1 cylinder top
dead center is not
detected at all.)
supply 4 seconds
after a problem is
detected. (After the
ignition switch is
turned to ON, the
No.1 cylinder top
dead center is not
detected at all.)
sensor