Knock Sensor: Testing and Inspection

Knock Sensor Schematic:

A faulty knock sensor will set code 22 in the on-board diagnostic system. Refer to the schematic diagram and test the sensor with the diagnostic chart.

Wire color code identification:

L: Blue
B: Black
Y: Yellow
G: Green
R: Red
W: White
Br: Brown
Lg: Light green
Gr: Gray

Knock Sensor Diagnostic Chart:

KNOCK SENSOR DIAGNOSTIC CHART