Knock Sensor: Testing and Inspection

CIRCUIT DIAGRAM








HARNESS INSPECTION PROCEDURES

USING OSCILLOSCOPE





1. Connect the probe to the oscilloscope pick-up point as shown in the circuit diagram.
2. Rev up the engine to 5,000 rpm, and check the waveform.

TROUBLESHOOTING HINTS
If there is a problem with the knock sensor there will be a reduction in power.