P0328 (U5/Low Emissions)

DTC P0328 - KNOCK SENSOR 1 CIRCUIT HIGH INPUT (BANK 1 OR SINGLE SENSOR)

OUTLINE OF DIAGNOSIS
Detect the open or short circuit of the knock sensor. Judge NG when out of the standard value.




COMPONENT DESCRIPTION




ENABLE CONDITION

GENERAL DRIVING CYCLE
Always perform diagnosis continuously.

DIAGNOSTIC METHOD




- Abnormality Judgment
Judge NG when the continuous time of completing the malfunction criteria becomes more than 1 second.




- Normality Judgment
Judge OK and clear NG when the malfunction criteria are completed.


DTC CLEAR CONDITION
- When the OK idling cycle was completed 40 times in a row
- When "Clear Memory" was performed

MALFUNCTION INDICATOR LIGHT CLEAR CONDITION
- When the OK driving cycle was completed 3 times in a row
- When "Clear Memory" was performed

FAIL SAFE
Knock compensation:
- At normal: Learned ignition timing value = knock F/B timing value + whole learning timing value + partial learning timing value.
- At trouble: Learned ignition timing = -3 °CA (Retard 3 °CA)
Knock F/B timing value = 0 °CA
Whole learning is not allowed.
Partial learning is not allowed.

ECM OPERATING AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)