Wide Open Throttle

This is an OPEN LOOP mode. When the engine is experiencing a wide open throttle condition, the controller receives the following inputs:

^ Battery voltage
^ Coolant temperature sensor
^ Crankshaft Position Sensor (CPS)
^ Manifold Air/fuel Temperature (MAT) sensor
^ Manifold Absolute Pressure (MAP) sensor
^ Sync signal
^ Throttle Position Sensor (TPS)

Based on the previous input signals, the following occurs:

^ The fuel pump ballast resistor is bypassed, allowing full system voltage to be applied to the fuel pump via the ballast bypass relay.
^ The fuel injector pulse width and injector firing sequence are controlled by the engine controller. The engine controller does this by switching the ground to the injectors OFF and ON.
^ The engine controller ignores the oxygen sensor input signal and provides a predetermined amount of additional fuel by adjusting injector pulse width.
^ The engine controller increases or decreases the ignition spark advance and ignition timing by applying and removing the ground path to the ignition module.
^ If the engine controller receives inputs that indicate that the vehicle is experiencing a wide open throttle condition (and the A/C has been selected by the driver), it will DE-ENERGIZE the A/C clutch relay (DIS-ENGAGING the A/C compressor clutch) for approximately 15 seconds or until the vehicle is no longer experiencing a wide open throttle condition.
^ The upshift indicator lamp is controlled by the engine controller (Manual Transmission).