Mirage L4-1795cc 1.8L SOHC 16 Valve (1995)
Cranking Signal: Description and Operation
Automatic Transmission
DESCRIPTION
The ignition switch-ST inputs a high signal to the engine control module while the engine is cranking. The engine control module provides fuel
injection control, etc., at engine start up based on this signal.
OPERATION
When the ignition switch is set to START, the battery voltage at cranking is applied through the ignition switch and Park/Neutral position switch
to the engine control module, which detects that the engine is cranking. In case the selector lever is in a position other than the P/N range, the
battery voltage is not applied to the engine control module.
The Park/Neutral position switch converts the selector lever position (whether it is at the P/N range or at others) into high/low voltage and inputs it
to the engine control module, which then controls the idle air control motor based on this signal.
The battery voltage in the engine control module is applied through a resistor to the Park/Neutral position switch. When the selector lever is set to
the P/N range, continuity is produced between the Park/Neutral position switch terminal of the engine control module and ground through the
starter motor, thereby making the terminal voltage go low.