Disconnect the KS and PCM connectors and inspect for looseness, poor connection, bending, corrosion, contamination, deterioration or damage. Reconnect the connectors

Connect the GDS and go to ""Current Data"".

Monitor KS values in Current Data, check and wiggle the harness(es), connector(s), and terminal(s).

Any change in the values indicates a poor connection. Was a connector problem found?

	▶ Repair the connector. Go to "Verification of Vehicle Repair" procedure.
	▶ Go to "Signal Circuit Inspection" procedure.

IG "OFF". Disconnect knock sensor connector.

IG "ON".

Measure voltage between low signal terminal of knock sensor harness connector and chassis ground.

Measure voltage between high signal terminal of knock sensor harness connector and chassis ground.

Is the measured voltage within specification ?

	▶ Go to "Check short to ground in harness" as follows.
	▶ Repair short to battery in harness. Go to "Verification of Vehicle Repair" procedure.

IG "OFF". Disconnect knock sensor connector and PCM connector.

Measure resistance between low signal terminal of knock sensor harness connector and chassis ground.

Measure resistance between high signal terminal of knock sensor harness connector and chassis ground.

Is the measured resistance within specification ?

	▶ If the problem is corrected after substituting with a known - good knock sensor, replace it. If the problem is pending, check for proper operating after substituting with a known - good PCM. and then if the problem is corrected, replace PCM and go to "Verification of Vehicle Repair" procedure.
	▶ Repair short to ground in harness. Go to "Verification of Vehicle Repair" procedure.