|
|
• Data Link Connector (PCI and SCI Transmit) • Double Start Override • EGR Solenoid • Fuel Injectors • Generator Field • High Speed Fan Relay • Idle Air Control Motor • Ignition Coils • Leak Detection Pump • Low Speed Fan Relay • MTV Actuator • Proportional Purge Solenoid • SRV Valve • Speed Control Relay • Speed Control Vent Relay • Speed Control Vacuum Relay • 8 Volt Output • 5 Volt Output module (PCM) adjusts fuel injector pulse width, idle The PCM adjusts injector pulse width (air-fuel ratio) based on the following inputs. • Battery Voltage • Intake Air Temperature Sensor • Engine Coolant Temperature • Engine Speed (crankshaft position sensor) • Exhaust Gas Oxygen Content (heated oxygen sensors) • Manifold Absolute Pressure • Throttle Position idle air control motor based on the following inputs. • Brake Switch • Engine Coolant Temperature • Engine Speed (crankshaft position sensor) • Park/Neutral (transmission gear selection) • Transaxle Gear Engagement • Throttle Position • Vehicle Speed (from Transmission Control Mod- ule) The PCM adjusts ignition timing based on the fol- lowing inputs. • Intake Air Temperature • Engine Coolant Temperature • Engine Speed (crankshaft position sensor) • Knock Sensor • Manifold Absolute Pressure • Park/Neutral (transmission gear selection) • Transaxle Gear Engagement • Throttle Position relays are mounted externally, but turned on and off by the powertrain control module through the same The camshaft and crankshaft signals are sent to the powertrain control module. If the PCM does not The PCM contains a voltage converter that changes battery voltage to a regulated 8.0 volts. The The PCM engine control strategy prevents reduced idle speeds until after the engine operates for 320 km AIR CONDITIONING PRESSURE TRANSDUCER— The Powertrain Control Module (PCM) monitors the A/C compressor discharge (high side) pressure AUTOMATIC SHUTDOWN (ASD) SENSE—PCM The ASD sense circuit informs the PCM when the ASD relay energizes. A 12 volt signal at this input When energized, the ASD relay supplies battery voltage to the fuel injectors, ignition coils and the BATTERY VOLTAGE—PCM INPUT The PCM monitors the battery voltage input to determine fuel injector pulse width and generator If battery voltage is low the PCM will increase injector pulse width (period of time that the injector 300M FUEL SYSTEM 14 - 23 DESCRIPTION AND OPERATION (Continued) |