Engine Start-Up Mode
WARNING: This page is about a different car, the 2009 Dodge Sprinter. However, it is still accessible from the selected car via links, so may be relevant.
When the EIS/CGW is turned to the START position from the ON position, it will send the ON and START signals to the ECM through the CAN-C bus. When the ECM receives the ON and START signals, and the Gearshift is in neutral or park, the ECM will actuate the Starter Relay, which provides battery voltage to the Starter Solenoid, which actuates the Starter. As the engine cranks, the ECM will use the signals from the Camshaft and Crankshaft Position Sensors to determine when cylinder 1 is at TDC. When the ECM has sensed engine RPM and the TDC position of cylinder 1, it will sequence the actuation of the injectors according to engine firing order. If the camshaft position sensor is not present during engine cranking, the engine will not start.