Knock Sensor: Testing and Inspection

KNOCK SENSOR (KS) INSPECTION

NOTE: Perform the following inspection only when directed.

Resistance Inspection
1. Disconnect the negative battery cable.
2. Disconnect the KS connector.




3. Measure the resistance between KS terminals A and B using an ohmmeter.
- If the KS is okay, but the PID value is out of specification, perform the "Circuit Open/Short Inspection".
- If not as specified, replace the KS. (See KNOCK SENSOR (KS) REMOVALS INSTALLATION.)

Specification: Approx. 4.87 megaohms (20 °C {68 °F})

Circuit Open/Short Inspection

1. Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION.)




2. Inspect the following harness for open or short circuit. (Continuity check)

Open circuit
- KS terminal B (harness-side) and PCM terminal 31 (harness-side).
- KS terminal A (harness-side) and PCM terminal 4 (harness-side).

Short circuit
- KS terminal A (harness-side) and power supply.
- KS terminal A (harness-side) and body GND.
- KS terminal B (harness-side) and power supply.
- KS terminal B (harness-side) and body GND.