Circuit Description

Knock Sensor (KS) is used to detect engine detonation (knock). When KS module in PCM determines that an abnormally high noise channel voltage exists, PCM will set DTC P0327.

Conditions required to set DTC are:

• No active CKP, ECT, MAF, TP or VSS sensor DTCs set.
• ECT greater than 167°F (75°C).
• Engine load is greater than 3 percent.
• TP angle greater than 3 percent.
• Engine speed is 1000-4000 RPM.
• Maximum system spark retard less than 15 percent.
• System voltage greater than 9 volts.
• PCM detect a KS 2 signal voltage within the calculated average voltage range.