Summit Vista FWD L4-1795cc 1.8L SOHC (1992)
Camshaft Position Sensor: Component Tests and General Diagnostics
Top Dead Center Sensor Circuit
To test the Camshaft (TDC) Sensor located in the distributor, proceed as follows.
OSCILLOSCOPE TESTING PROCEDURE:
1. Connect test leads from the oscilloscope to the #4 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 1 and 4 of the crank angle sensor connector.
Terminal 4: Camshaft (TDC) signal
Terminal 1: Sensor ground
2. Measure the output voltage of the terminals while cranking the engine.
Standard approximate value
2.0 - 2.5v
3. When the voltage is abnormal, check the sensor power and ground circuits.
HARNESS TEST:
1. Disconnect the Crankshaft Position/Camshaft (TDC) sensor connector and turn the key to the ON position.
