3000GT AWD V6-2972cc 3.0L DOHC Turbo 24 Valve (1996)
Cranking Signal: Description and Operation
Automatic Transmission
OPERATION
The Ignition Switch inputs a high signal to the Engine Control Module (ECM) while the engine is cranking. The ECM provides fuel injection
control, etc., at engine start-up based on this signal.
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 ECM, 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 ECM.
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 ECM, which then controls the Idle Air Control Motor based on this signal.
The battery voltage in the ECM 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 ECM and ground through the starter motor, thereby making the
terminal voltage go low.
