Standard Starting System: Operation

Starting System Flow 

• Pressing the Keyless Ignition Node (KIN Button), a request is sent to the Radio Frequency Hub Module (RFHM) via the private LIN bus.
• The RFHM receives the request from the KIN and then looks for the valid key via the Low Frequency (LF) antennas.
• If the RFHM detects a valid key and if the brake is engaged, the RFHM sends a CAN request to the Body Control Module (BCM) to change the ignition position to START/CRANK.
• Then the BCM sends the command to turn the vehicle to CRANK.
• If conditions are correct to start, the Powertrain Control Module (PCM) turns on the low side of the PCM starter relay and turns the Crank Hold Signal to True. If the BCM is still in crank and the Crank Hold is true then the BCM turns on the high side of the BCM Starter relay and the engine will start cranking.
• Once the engine is started the PCM deactivates the double start over ride.
• The BCM will then deactivate the starter either when the engine starts or the maximum time of 10 seconds has been reach for the tip start.
• The RFHM changes the ignition position to RUN if the start type is TIP start or the 5 second time expires or the engine controller indicates the vehicle is not in park or neutral.
• The engine can be manually shut down by the driver with speeds over 5 MPH in any gear.