Starting System - Without Intelligent Access (IA): Notes
Overview
The starter system controls the cranking of the engine. The starter motor is enabled by the starter relay when the relay is activated by the PCM. The PCM receives inputs from the ignition switch, BCM Run/start relay and TR sensor before activating the starter relay to crank the engine.
Remote Start
The remote start feature allows the operator to remotely start the engine from up to 20 meters (65.62 feet) away and is activated using the IKT. Once started, the engine runs for 10 minutes. The run time can be extended by the operator.
System Operation
System Diagram
Network Message Charts
Module Network Input Messages BCM
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| RKE data | TPM module | Provide the BCM with the RKE TIC and the button press requesting a remote start. |
Module Network Input Messages PCM
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| Starter crank request | BCM | Provides the PCM with ignition switch and hood input status and a request to crank and start the engine during a remote start event. |
| Remote start request | BCM | Provides the PCM with a request for remote start. |
Starting System
Under normal operation, when the ignition is turned to START, the PCM receives the following inputs:
- Ignition switch request to start the engine
- Run/start relay voltage
- Passive Anti-Theft System (PATS) is enable message
- Correct transmission PARK or Neutral input from the TR sensor
When the PCM receives the correct inputs, voltage and ground is supplied to the starter relay coil. The starter relay coil is energized causing the relay contacts to close providing voltage to the starter solenoid, allowing the starter motor to crank and start the engine.
The PCM disengages the starter once an engine Revolutions Per Minute (RPM) threshold is reached, a set crank time is exceeded or the ignition is turned OFF.
Remote Start
Under normal operation, when equipped with remote start, a remote start event is initiated when the IKT transmits a remote start request signal to the TPM module. The TPM module sends a remote start request message to the BCM. The BCM sends a crank request message to the PCM. The factory equipped remote start system does not operate if the ignition is in the RUN/START position or the hood is not closed.
The remote start system enables the engine to be started from up to 20 meters (65.62 feet) away, by pressing a sequence of buttons on the IKT. The remote start system is activated by pressing the lock button on the IKT, to make sure the doors are locked, followed by 2 presses of the remote start button. The 3 button presses must occur within 3 seconds. The BCM acknowledges the start request by flashing the exterior lights twice. Once started, the engine runs for 10 minutes (default run time is 10 minutes; the time can be programmed by the customer to 5, 10 or 15 minutes) and the parking lights remain illuminated until the cycle is complete. The remote start duration can also be extended by initiating remote start while the first timer is still running or by initiating a completely independent start cycle when the first has completed. No more than 2 remote start sequences can occur within a one hour period, unless the ignition is set to the RUN/START position between the remote start requests. During the remote start cycle the power windows are inhibited and the radio will not turn on automatically but may be switched on manually from inside the vehicle. If the remote start system fails to start the horn chirps twice.
To transition from remote start mode to drive mode, use a programmed IKT to switch the ignition to the RUN position. If a programmed IKT is not used, the engine shuts off.
To deactivate the remote start system, press the remote start button once. When deactivating the remote start system the parking lights turn off to give a visual indication that the engine and climate control features have turned off. It may be necessary to be closer to the vehicle to deactivate the remote start feature than it was to initiate it due to ground deflections and added noise from the engine running.