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NOTE: PCM Outputs: • Air Conditioning Clutch Relay • Auto Shutdown (ASD) Relay • Charging Indicator Lamp (Bus Message) • SCI Transmit • Proportional Purge Solenoid • EGR Solenoid • Fuel Injectors • Fuel Pump Relay • Generator Field • Idle Air Control Motor (2.0/2.4L) • Ignition Coils • J1850 • Malfunction Indicator (Check Engine) Lamp (Bus Message) • Oxygen Sensors Heater Controls • Radiator Fan Relays • Speed Control Solenoids (2.0/2.4L) • Transmission Control Relay • Transmission Solenoids (LR/CC, 2/4, OD, and UD) • Transmission PRNDL Position (to Cluster) • Transmission Torque Reduction Request (Inter- nal to PCM) • Transmission Temperature (Internal to PCM and a Bus Message) • Vehicle Speed (Manual Transmission) injector pulse width, idle speed, ignition spark The PCM adjusts injector pulse width (air-fuel ratio) based on the following inputs. • Battery voltage • Coolant temperature • Exhaust gas content (oxygen sensor) • Engine speed (crankshaft position sensor) • Intake air temperature • Manifold absolute pressure • Throttle position lowing inputs. • Coolant temperature • Engine speed (crankshaft position sensor) • Knock sensor • Manifold absolute pressure • Throttle position • Transmission gear selection (park/neutral switch) • Intake air temperature The PCM also adjusts engine idle speed through the idle air control motor based on the following • Air conditioning sense • Battery voltage • Battery temperature • Brake switch • Coolant temperature • Engine speed (crankshaft position sensor) • Engine run time • Manifold absolute pressure • Power steering pressure switch • Throttle position • Transmission gear selection (park/neutral switch) • Vehicle distance (speed) are located in the Power Distribution Center (PDC). The camshaft position sensor and crankshaft posi- tion sensor signals are sent to the PCM. If the PCM The PCM contains a voltage converter that changes battery voltage to a regulated 5 volts direct Powertrain Control Module Connectors The PCM is an engine and transmission controller module all in one, if the vehicle is equipped with an The PCM module utilizes four wiring harness con- nectors as described: • Connector Cavity A is for Power & Ground (Black) • Connector Cavity B is for Engine Side (Orange) • Connector Cavity C is for Headlamp & Dash (White) • Connector Cavity D is for Transmission (Green) If equipped 8E - 8 ELECTRONIC CONTROL MODULES PT POWERTRAIN CONTROL MODULE (Continued) |