Galant L4-2.0L SOHC (1989)
Crankshaft Position Sensor: Testing and Inspection
TDC Sensor
To test the Top Dead Center (TDC) Sensor located in the distributor, proceed as follows.
System Schematic
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
Check the waveform and compare it to the diagram shown.
VOLTAGE TESTING PROCEDURE:
1.
Connect a voltmeter between terminal 2 and 4 of the crank angle sensor connector.
Terminal 4: Top Dead Center (TDC) signal
Terminal 2: Sensor ground
2.
Measure the output voltage of the terminals while cranking the engine.
Standard Approximate Value
Terminal 4:
2.0 - 2.5v
