DTC P0327: Knock Sensor 1 Circuit Low Input (Bank 1 Or Single Sensor)

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

Always perform the diagnosis continuously.

• Abnormality Judgment 

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

  Judgment Value 

  JUDGMENT VALUE CHART
  
  

  Malfunction Criteria	Threshold Value
  Output voltage	<0.238 V
  Ignition switch	ON

  Time Needed for Diagnosis: 1  second

  Malfunction Indicator Light Illumination:  Illuminates as soon as the malfunction occurs.

• Normality Judgment 

  Judge OK and clear NG when the malfunction criteria below are completed.

  Judgment Value 

  JUDGMENT VALUE CHART
  
  

  Malfunction Criteria	Threshold Value
  Output voltage	<0.238 V
  Ignition switch	ON

• When the OK idling cycle was completed 40 times in a row
• When "Clear Memory" was performed

• When the OK driving cycle was completed 3 times in a row
• When "Clear Memory" was performed

Knock compensation:

• Knock compensation final timing advance and retard value = knock compensation + whole learning compensation value + partial learning compensation value.
• At normal: knock compensation = 0°CA is fixed.
• At trouble: knock compensation = -5°CA. (Retard 5°CA.)
• Not allowed to update the whole learning compensation factor.
• Not allowed to calculate the partial learning zone compensation value.

Memorize the freeze frame data. (For test mode $02)