Component Testing

TDC Sensor Circuit:

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.