Laser FWD L4-1997cc 2.0L DOHC (1992)
Camshaft Position Sensor: Component Tests and General Diagnostics
Top Dead Center (TDC) Sensor Circuit
To test the Camshaft (TDC) Sensor located on the right side of the cylinder head, proceed as follows.
OSCILLOSCOPE TESTING PROCEDURE:
1. Connect test leads from the oscilloscope to the #1 terminal of the sensor connector and run the engine at idle speed.
Scope Test Waveform--single Rotation Of The Distributor
2. Check the waveform and compare it to the diagram shown.
VOLTAGE TESTING PROCEDURE:
1. Connect a voltmeter between terminal 3 and 1 of the crank angle sensor connector.
Terminal 1: Camshaft (TDC) signal
Terminal 4: Sensor ground
2. Measure the output voltage of the terminals while cranking the engine.
Standard approximate value
2.0 - 2.5v
