LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Geo >> 1994 >> Prizm Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Computerized Engine Controls >> Engine Sensors & Switches >> Knock Sensor (LSi)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Knock Sensor (LSi)

  1. A malfunction in the knock sensor circuit will set diagnostic trouble Code 52. For testing procedures, see TESTS W/CODES article in this section. Use the following procedure to diagnose knock sensor.
  2. Check knock sensor resistance using ohmmeter. Measure resistance between knock sensor terminal and ground. Knock sensor, located on rear of engine block, has Black wire connector. Replace sensor if resistance is not one megohm or higher.
  3. To check knock sensor operation, remove connector from knock sensor. Connect DVOM between knock sensor terminal and ground. Adjust voltmeter to 200 millivolts on AC scale. Tap on engine block near knock sensor, and note reading. Replace knock sensor if no reading is obtained.
scientia non olet · About LEMON Manuals