DTC P0519: Idle Control System Malfunction (Fail-Safe)

Detect the malfunction that engine speed increases more than that in normal condition during idling.

Always perform diagnosis at less than 4 km/h (2.49 MPH) of vehicle speed.

• Abnormality Judgment 

  Judge NG when the continuous time until completing the all malfunction criteria below becomes more than the time needed for diagnosis (2 seconds).

  Judgment Value 

  JUDGMENT VALUE CHART
  
  

  Malfunction Criteria	Threshold Value
  Engine speed - target eng. speed	"GREATER THAN EQUAL TO" 1000 rpm
  Feedback value for ISC	"LESS THAN EQUAL TO" 0
  Engine speed change every 180 degree engine rev.	"GREATER THAN EQUAL TO" -5 rpm

  Time Needed for Diagnosis:  2 seconds

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

• Normality Judgment 

  Judge OK and clear NG when the continuous time until completing the malfunction criteria below becomes more than the time needed for diagnosis (5 seconds).

  Judgment Value 

  JUDGMENT VALUE CHART
  
  

  Malfunction Criteria	Threshold Value
  Engine speed - target eng. speed	< 200 rpm

• 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

Fuel shut-off: Shut-off fuel for only #1 and #2 cylinder, or for all cylinder in accordance with vehicle speed, engine speed, throttle position

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