DTC Confirmation Test

Malfunction is detected when ECM receives an excessively low or high voltage from knock sensor. Possible causes are:

• Knock sensor circuit open or shorted.
• Defective knock sensor.

Depending on equipment available, use one of the following to set DTC:

• Using Scan Tool
  
  Start engine and let it idle for at least 5 seconds. Select MODE 3 on scan tool.
• Using MIL
  
  Start engine and let it idle for at least 5 seconds. Turn ignition off and wait at least 5 seconds. Turn ignition on and retrieve DTCs using MIL. See SELF-DIAGNOSTIC SYSTEM in SELF-DIAGNOSTICS - INTRODUCTION article.