In 1990, the base model was dropped in favor of a sedan version (replacing the 6000 which ended production the next year and the Canada-only Tempest), entering production on September 12, 1989. A notable introduction for the Grand Prix in 1990 is the new STE (Special Touring Edition) which replaced the STE model of the Pontiac 6000. In contrast to that model, it trades in all-wheel-drive for the available Turbo 3.1L V6. Standard features include a cassette stereo with equilizer and eight speakers (a compact disc player was optional), remote keyless entry, eight-way power driver's seat with multiple lumbar and sidewing adjustments for both front seat occupants, and a compass/trip computer that was more informative than the units in the SE and turbo coupes. An LE sedan was also available for 1990, standard with a 2.3L Quad 4 engine and a 3-speed automatic, the first use of an inline 4 cylinder engine in a Grand Prix .
Fig.1.Car wiring diagram for ECM Pin-out and Connectors 1990 Pontiac Grand Prix 3.1L.
Car Wiring Diagram shows an wiring diagram and electric schematic on 1990 Pontiac Grand Prix 3.1L the engine steering module (ECM), a pin and connectors. 1990 Pontiac Grand Prix 3.1L the engine steering module is defined to steer an engine control system what regulates air/fuel mixture and uses a catalytic converter to minimise quantity of the pollution made from the engine. ECM (look wiring diagram) also supervises the input and exit signals, made by various gauges in systems which engages a vehicle speed sensor, the gauge of level of a cooling fluid, a various temperature detector of air, the pressure control device of air of measures, a coolant temperature detector, the oxygen gauge, the relay of the control over the fan, etc.
