Circuit Description

Knock Sensor (KS) module is located in PCM. KS module monitors both knock sensors to determine if detonation is present. If excessive knock is present, PCM will retard timing until knock goes away. When KS module is missing or malfunctioning, KS circuit voltage going to PCM will go low. PCM interprets this low signal as spark knock.

DTC will set when following conditions are present:

• PCM determines KS module is missing.
• A malfunction with KS module or circuits to module are faulty.