Starting System - without Intelligent Access (IA)
Starting System - without Intelligent Access (IA)
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 (Powertrain Control Module). The ignition switch provides voltage to the BCM (Body Control Module) and PCM (Powertrain Control Module) to initiate cranking of the engine.
Remote Start
The remote start feature allows the operator to remotely start the engine from up to 100 meters (328 feet) away and is activated using the IKT (Integrated Keyhead Transmitter). Once started, the engine runs for 10 minutes. The run time can be extended by the operator.
System Operation
System Diagram
Network Message Chart
Module Network Input Messages BCM (Body Control Module)
Module Network Input Messages PCM (Powertrain Control Module)
Starting System
NOTE: This vehicle is equipped with PATS (Passive Anti-Theft System) that disables the engine from cranking and starting if an unprogrammed PATS (Passive Anti-Theft System) key is used or an invalid PCM (Powertrain Control Module) ID is received. PATS (Passive Anti-Theft System) is controlled by the BCM (Body Control Module). If there is a PATS (Passive Anti-Theft System) concern that cause the engine to be disabled, the IPC (Instrument Panel Cluster) displays "STARTING SYSTEM FAULT" in the message center. For additional information on the PATS (Passive Anti-Theft System), REFER to Passive Anti-Theft System (PATS) - without Intelligent Access (IA) Passive Anti-Theft System (PATS) - without Intelligent Access (IA).
Under normal operation, when the ignition is turned to START, the PCM (Powertrain Control Module) receives the following inputs:
- Request to start the engine
- PATS (Passive Anti-Theft System) is enable message
- Correct transaxle PARK or Neutral input from the TR (Transmission Range) sensor
When the PCM (Powertrain Control Module) 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 (Powertrain Control Module) disengages the starter once an engine RPM (Revolutions Per Minute) 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 (Integrated Keyhead Transmitter) transmits a remote start request signal to the TPM (Tire Pressure Monitor) module. The TPM (Tire Pressure Monitor) module sends a remote start request message to the BCM (Body Control Module). The BCM (Body Control Module) sends a crank request message to the PCM (Powertrain Control Module). 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 100 meters (328 feet) away, by pressing a sequence of buttons on the IKT (Integrated Keyhead Transmitter). The remote start system is activated by pressing the lock button on the IKT (Integrated Keyhead Transmitter), 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 (Body Control Module) 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 (Integrated Keyhead Transmitter) to switch the ignition to the RUN position. If a programmed IKT (Integrated Keyhead Transmitter) 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.
Component Description
Integrated Keyhead Transmitter (IKT)
The RKE (Remote Keyless Entry) system uses an IKT (Integrated Keyhead Transmitter). The IKT (Integrated Keyhead Transmitter) incorporates both the PATS (Passive Anti-Theft System) and RKE (Remote Keyless Entry) functions into a single device. The factory installed remote start (if equipped), is controlled by the IKT (Integrated Keyhead Transmitter) function and allows the engine to be started from outside the vehicle. The RKE (Remote Keyless Entry) functions controls the door Lock/Unlock features.
Passive Anti-Theft Transceiver
REFER to Passive Anti-Theft System (PATS) Transceiver Passive Anti-Theft System (PATS) - without Intelligent Access (IA).
Body Control Module (BCM)
The BCM (Body Control Module) is the gateway module, translating messages on the HS-CAN (High Speed Controller Area Network) to MS-CAN (Medium Speed Controller Area Network). This allows a message to be distributed throughout both networks.
Ignition Switch
The ignition switch is controlled by the ignition lock cylinder with a key. When the ignition lock cylinder is turned using the key, a mechanical connection positions the ignition switch to the selected position and allows the ignition switch to send voltage to specific components. The ignition switch sends voltage to the BCM (Body Control Module) and PCM (Powertrain Control Module) during engine cranking.
Powertrain Control Module (PCM)
The PCM (Powertrain Control Module) receives input signals from sensors and other components (switches, relays). Based on this information, the PCM (Powertrain Control Module) generates output signals to control various relays, solenoids and actuators.
Tire Pressure Monitor (TPM) Module
The TPM (Tire Pressure Monitor) module is a receiving antenna that receives high frequency signals. When a remote start request is initiated from the IKT (Integrated Keyhead Transmitter) the TPM (Tire Pressure Monitor) module receives the signal and communicates that remote start request message via the MS-CAN (Medium Speed Controller Area Network) to the BCM (Body Control Module) to initiate a remote start event.
Transmission Range (TR) Sensor
The TR (Transmission Range) sensor is located inside of the transaxle and indicates gearshift position to the PCM (Powertrain Control Module). The PCM (Powertrain Control Module) uses that information to enable the starting system to start the engine in PARK or NEUTRAL. REFER to Sensors and Switches Electrical System - 6F50 and 6F55 .