The Rig

iTrader: (13)

The IAM control parameters are used to define the operation of the IAM search phase. When the learned data is reset, or the closed loop ignition correction becomes large, the IAM is reset to the value defined in this table (which should lie between 0 and 16, ideally between 8 and 12). Under high load conditions, any knock is used to revise the value of the IAM until a stable value is reached. The ECU determines “high load conditions” from the amount of ignition advance specified in the ignition advance map. If this is greater than the threshold specified in this table, then the opportunity is taken to “learn” the IAM. Note if the threshold is greater than any value in the ignition advance map, the IAM will never “learn” its correct value and the closed loop knock control will not operate.