Condition for fault identification

Test condition:

The fault is logged in the ECU fault memory when the reference level is too low relative to the program map.

Potential problem source(s):

• Knock sensor is defective or installed incorrectly
• Wiring harness defective

Terminal condition: none

Voltage condition:

• Onboard electrical system voltage between 9 V and 16 V

Temperature condition:

• Engine warmed to normal temp, above 80 °C

Time condition:

• None

Other conditions:

• Engine on
• Engine speed above 2000 RPM
• Relative charge factor: > 30%
• No load, no dynamic changes in engine speed