Mitsubishi Eclipse 1990 Service Manual page 558

Code No. Camshaft Position Sensor Circuit
Malfunction
[Comment]
Background
When the engine is running, the camshaft position sensor outputs a pulse signal.
The engine control module checks whether the pulse signal is input.
Check Area, Criteria
1. Check Area, Judgement Criteria
Sensor output voltage has not changed (no pulse signal is input) for 4 sec.
2. Check Area, Judgement Criteria
Normal signal pattern has not been input for cylinder identification from the crankshaft
position sensor and camshaft position sensor signal for 4 sec.
Measure at the camshaft position sensor connector
Connect the connector.
Voltage between 2 and ground (Engine: cranking)
OK:
Voltage between 2 and ground (Engine: idling)
OK:
NG
Measure at the camshaft position sensor connector
Disconnect the connector. and measure at the harness
side.
1. Voltage between 3 and ground (Ignition switch: ON)
OK:
2. Voltage between 2 and
OK:
3. Continuity between 1 and ground
OK: Continuity
OK
Check trouble
NG
the camshaft oosition sensor.
ENGINE (TURBO)
AND ENGINE>
OK
1. NG
(Ignition switch: ON)
Repair
I
TSB Revision
Probable cause
Camshaft position sensor
Open or
cuit or loose connector
Engine control module failed
Replace the ECM.
Check the harness wire
the relay connector. Repair, if necessary.
Check trouble symptom.
I tor.
OK
Replace the ECM.
Check the harness wire between the camshaft position sensor and
the ground. Repair, if necessary.
position cir-
the camshaft position'
Repair