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Home >> Mercury >> 1992 >> Capri L4-1597cc 1.6L DOHC Turbo >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Transmission Position Sensor/Switch >> Description and Operation
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Transmission Position Sensor/Switch: Description and Operation

Neutral Gear Switch (NGS):






PURPOSE
The Neutral Gear Switch (NGS) detects when the manual transaxle is in the in-gear or neutral position and sends an input signal to the ECA. This is an engine load input used by the ECA in calculations for adjusting idle speed, air/fuel mixture, fuel pressure, and purge flow.

OPERATION
NGS is an ON/OFF switch that receives a 5 Volts reference from the ECA. When the switch is OPEN (transmission in GEAR), the ECA senses voltage. When the switch is CLOSED (vehicle in NEUTRAL), the ECA senses no voltage.
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