Knock Control System

PURPOSE
If engine knock occurs, system retards timing as needed. Protects engine from knock damage.

LOCATION
Knock sensor: Back side of engine block
Knock control unit: Right inner fender

OPERATION
If engine knock occurs, voltage is generated in the knock sensor and a signal is sent to the knock control unit. The knock control unit determines whether the knock sensor signal is actually caused by knocking or another source. If unit determines that engine knock is occuring, spark timing is retarded according to knock intensity, to a maximum of 15 degrees.