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Knock Sensor B280F

  1. Check wires at knock sensor. Disconnect connector at fuel distribution rail. Connect a jumper wire between pins No. 1 and 2 of connector.
  2. Measure resistance between control unit connector pins No. 12 (SB) and 13 (GR), and pins No. 24 (BN) and 25 (GN). Resistance should be zero ohms in both measurements. If resistance is high, there is an open circuit. Remove jumper wire and check each wire for continuity. Replace any broken wires.
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