Mitsubishi Eclipse 1990 Service Manual page 556

Check the harness wire between the ECM and the
sensor connector.
OK
Replace the knock sensor.
Check trouble
NG
Replace the ECM.
Code No. Crankshaft Position Sensor Circuit
Malfunction
[Comment]
Background
When the engine is running, the crankshaft position sensor outputs a pulse signal.
The engine control module checks whether the pulse signal is input while the engine
is cranking.
Check Area, Judgement Criteria
1. Check Area
Engine is being changed.
Judgement Criteria
Sensor output voltage
2. Check Area, Judgement
Normal signal pattern has not been input for cylinder identification from the crankshaft
position sensor signal and camshaft position sensor signal for 4 sec.
E N G I N E
AND
I
I
not changed (no pulse signal is input) for 4 sec.
Revision
Repair
Open or
circuit, or
Engine
.
crankshaft
connector
module failed