7. Open Sensor Ground Circuit

With the ignition off.

Measure the resistance of the Sensor Ground circuit from the Knock Sensor harness connector to the PCM C3 harness connector.

Fig 1: Measuring Resistance Of Sensor Ground Circuit

Courtesy of DAIMLERCHRYSLER CORP.

Is the resistance below 5.0 ohms? 

1. Yes  >> Replace the Knock Sensor. See IGNITION SYSTEM article.

   See POWERTRAIN VERIFICATION TEST - VER 2  .

2. No  >> Repair the Sensor Ground circuit for an open.

   See POWERTRAIN VERIFICATION TEST - VER 2  .