LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Volvo >> 1994 >> 940 Base, 4D Sedan, AW71 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Ignition System >> Timing Control Systems >> Detonation (Knock) Sensor (940)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Detonation (Knock) Sensor (940)

  1. Disconnect knock sensor connector. Connect jumper wire between knock sensor terminals No. 1 and 2. See Figure . Turn ignition off. Disconnect ignition ECU connector.
  2. Remove cover from ECU connector to expose terminal identification numbers. Connect ohmmeter leads between terminals No. 12 and 13 of ignition ECU connector. See Figure . Ohmmeter should indicate zero ohms.
  3. If ohmmeter resistance is high (infinity), one or both wires may be shorted. Remove jumper wire, and take reading with ohmmeter on each wire. Replace damaged wires as required. If wires are not damaged, replace knock sensor.
scientia non olet · About LEMON Manuals