Condition for fault identification

Test condition:

The fault is recognized when a high number of intense knock events is detected during engine operation in the upper end of the load range.

Potential problem source(s):

• Misuse, terminal status switch during vehicle operation
• Temporary contamination in combustion chamber or intake passages

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, in upper load range