Theory of Operation
ENGINE SPEED LEARNING CONTROL CIRCUIT OPERATION
The slow idle position data is stored in the engine and
The function of the engine speed learning control
circuit (G) is to learn the slow idle position as
determine by the slow idle stop bracket on the injection
The position of the engine control motor for auto-idle
pump and to store that data in the engine and pump
mode, E (economy) mode, and fast idle in standard
mode is based on the slow idle position data stored in
the engine and pump controller.
When the engine learning switch (F) is push up to the
learning position and the key switch (E) is turned on,
When the following components are repaired or
the engine control motor (C) is driven by an electrical
replaced, or when engine speeds deviate from
signal from the engine and pump controller (D). The
specification, the engine control motor adjustment and
control motor moves the injection pump lever to the
engine learning control procedure must be performed.
slow idle position (the end of slot in slow idle stop
bracket). An electrical feedback signal corresponding
to the slow idle position is sent back to the engine and
· Engine speed control cable.
pump controller by the EC (engine control) sensor (B).
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