Condition for fault identification

Test condition:

The fault is recognized when the knock signal is implausible for the current operating point. (Static evaluation, so no threshold value)

Potential problem source(s):

• Loose screw on knock sensor
• Defect in wiring harness between DME and knock sensor

Terminal condition: Terminal 15

Voltage condition:

• None

Temperature condition:

• None

Time condition:

• 1 - 3 sec.

Other conditions:

• Engine speed > 1500 RPM
• Air mass > 180 mg/hr