Idle Speed Control Monitoring

Idle Speed Control Monitoring

Idle speed control rationality diagnosis

General Description:
This diagnosis detects the stability of the idle speed. If the commanded idle speed and the actual idle speed is not within a calibrate able value, above or below commanded, in spite of an activated idle speed controller the idle speed is considered to be out of range. If the deviation is > 150 rpm, the idle speed controller monitor (P0506/P0507) would detect a fault.

If the above failure conditions are detected, the appropriate DTC will be stored.

Within this diagnosis is also defined an interface between the idle speed control and the 'Rate-Based Monitoring statistics'.

Flowchart: Idle speed control rationality diagnosis