Starting System - Vehicles With: Keyless Entry and Push Button Start - System Operation and Component Description

System Operation

System Diagram

Network Message Chart

  Module Network Input Messages Powertrain Control Module (PCM)

Starting System

This vehicle is equipped with a PATS that disables the engine from starting if an unprogrammed PATS key is used or an invalid PCM ID is received. The PATS is controlled by the BCM . If there is a PATS concern that disables the engine, the IPC displays the corresponding message in the message center.
Refer to: Passive Anti-Theft System (PATS) - System Operation and Component Description (419-01C Passive Anti-Theft System (PATS) - Vehicles With: Push Button Start, Description and Operation).

The starting system controls the cranking of the engine. Ignition modes are controlled by the BCM . For more information on push-button start
Refer to: Steering Wheel and Column Electrical Components - System Operation and Component Description (211-05 Steering Wheel and Column Electrical Components, Description and Operation).

The ignition switch - push button start is connected to the BCM and the PCM in case of a failure. If there is a circuit failure to either module from the ignition switch - push button start, the modules communicate the ignition switch - push button start request to each other over the High Speed Controller Area Network (HS-CAN). During a start event, the ignition switch - push button start is pressed in combination with the brake pedal. The BCM and the PCM receive a request to start the engine. The PCM recognizes the correct inputs and provides voltage and ground to energize the starter relay coil and close the starter relay contacts. The starter relay contacts close, providing voltage to the starter solenoid, allowing the starter motor to crank the engine. The PCM disengages the starter motor once an engine Revolutions Per Minute (RPM) threshold is reached, a set crank time is exceeded or the ignition switch - push button start is pressed indicating an engine shutdown request.

Remote Start

The remote start feature allows the operator to remotely start the engine from up to 150 meters (492 feet) away and is activated using the Passive Key. Once started, the engine runs for 10 minutes. The run time can be extended by the operator. Refer to the Owners Guide for more information.

The factory equipped remote start system does not operate if the following preconditions are not met:

Preconditions

• Remote start feature configured On. Refer to Owners Literature.
• MIL not illuminated.
• Transmission in Park.
• No PATS concerns.
• All doors closed.
• Hood fully closed.
• Ignition OFF for more than 15 seconds.

Begin a remote start event by pressing the lock button on the Passive key once 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 of each other. The system acknowledges the start request by flashing the exterior lights twice and displaying a message in the IPC that the vehicle has successfully started. 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 turned on manually from inside the vehicle. If the remote start system fails to start the horn will chirp once. No message will be displayed in the IPC .

To transition from remote start mode to drive mode, use a programmed Passive key to transition to RUN. If a programmed Passive key 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.

For more information on enabling the Remote start system refer to the Owners Literature.

Component Description

Body Control Module (BCM)

Refer to: Module Controlled Functions - System Operation and Component Description (419-10 Multifunction Electronic Modules, Description and Operation).

Ignition Switch - Push Button Start

The ignition switch - push button start (Engine Start/Stop button) is a momentary contact switch that is hardwired to the BCM and the PCM . The ignition switch - push button start is used to obtain the OFF, ON or START ignition modes. For more information,
Refer to: Steering Wheel and Column Electrical Components - System Operation and Component Description (211-05 Steering Wheel and Column Electrical Components, Description and Operation).

Passive Key

REFER to 419-01

Passive Anti-Theft Transceiver

Refer to: Passive Anti-Theft System (PATS) - System Operation and Component Description (419-01C Passive Anti-Theft System (PATS) - Vehicles With: Push Button Start, Description and Operation).

Powertrain Control Module (PCM)

The PCM provides power and ground to the starter relay to initiate cranking of the engine.

RTM

Refer to: Tire Pressure Monitoring System (TPMS) - System Operation and Component Description (204-04B Tire Pressure Monitoring System (TPMS), Description and Operation).

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