Remote Start System

DESCRIPTION 

Courtesy of CHRYSLER GROUP, LLC

In addition to the standard starting system components, the remote starting system can consist of the following components:

1.	Refer to REMOTE START ANTENNA (RSA) .
2.	Refer to RADIO FREQUENCY HUB (RFH) MODULE .
3	Refer to KEYLESS IGNITION NODE (KIN) .
4.	Refer to INSTRUMENT PANEL CLUSTER (IPC) .
5.	Refer to BODY CONTROL MODULE (BCM) .
6.	Refer to POWER DISTRIBUTION CENTER (PDC) .
7.	Refer to INTELLIGENT BATTERY SENSOR (IBS) .
8.	Refer to HOOD AJAR SWITCH #2 .
9.	Refer to POWERTRAIN CONTROL MODULE (PCM) .
-	Refer to REMOTE KEYLESS ENTRY (RKE) KEY FOB .
-	Refer to REMOTE START INHIBITOR COMPONENTS .

Remote start conveniently starts the engine from outside the vehicle by using the RKE key fob while maintaining security. The system has a targeted range of at least 100 m (328 ft). The vehicle must be locked, the swing gate and hood closed and the transmission in PARK in order to start the engine using the Remote Start button on the key fob.

The remote start system can activate interior illumination, climate control, the optional heated/ventilated seats, and optional heated steering wheel depending on temperatures outside and inside the car. However, operation of the power top and the power windows are inhibited during the remote start event until the driver presses the push start button.

OPERATION 

Remote Start Operation:

• The RFH detects that the remote start button has been pressed twice within five seconds. Note that if the remote start button is pressed again, this will terminate the remote start event.
• The RFH authenticates the key fob.
• The RFH then broadcasts several messages over the a Controller Area Network-Chassis (CAN-C) bus to the BCM indicating the physical position of the key fob, if the ignition is in run or start mode and if the vehicle is equipped with an Electronic Steering Lock (ESL) and the ESL's operative state.
• The BCM then receives the "Starter Enable" request over the CAN-C bus from the RFH.
• The BCM challenges and reads the states of the remote start inhibitors.
• If there are no active inhibitors, the BCM broadcasts the ignition commands request over the CAN-C bus, CAN-Interior High Speed (IHS) bus, and the Local Interface Network (LIN) bus networks. Any module or component that needs to use ignition inputs uses ignition outputs controlled by the BCM.
• The PCM receives the "Starter Enable" request over the CAN-C bus.
• The PCM initiates a minikrypt code exchange with the BCM. The BCM responds to this challenge with a verification acknowledgement to the PCM.
• If the minikrypt code exchange was successful, the PCM applies a Low Side Driver (LSD) as needed to energize the starter relay.
• Starter Relay is actuated. This relay is powered by a dedicated fuse in the PDC allowing the starter to crank.
  NOTE:

  If the minikrypt verification was not successful, the PCM shuts down the engine after two seconds.

Refer to COMPONENT INDEX .

• Is the gateway module used to convert BUS messages, then broadcasts them from one bus to another.
• Reads the state of the door, swing gate and hood switches before enabling CRANK
• The BCM is responsible for actuating the starter relay low side driver once commanded by the PCM high side relay CRANK command.
• Receives over LIN bus the IBS information about raw battery current, voltage, and temperature levels.
• Is responsible for deactivating the starter motor.

Refer to COMPONENT INDEX .

• This switch is used to indicate if the hood is in the open or closed state. Indicates the status to the PCM.

Refer to COMPONENT INDEX .

• The IBS interacts with the BCM by means of the LIN bus communications. The BCM is its master node.
• Used to give information about raw battery current, voltage, and temperature levels. The battery needs to be at an acceptable charge level for the vehicle to remote start.

Refer to COMPONENT INDEX .

The Keyless Go feature requires the vehicle to be equipped with an IPC display for prompts and status information. The display messages are:

• KEY FOB NOT DETECTED
• REMOTE START ACTIVE PUSH START BUTTON
• REMOTE START DISABLED START VEHICLE TO RESET
• REMOTE START CANCELLED TIME EXPIRED
• REMOTE START CANCELLED FUEL LOW
• REMOTE START CANCELLED DOOR OPEN
• REMOTE START CANCELLED HOOD OPEN

Refer to COMPONENT INDEX .

• When the operator presses the START/STOP KIN button, the key fob is validated by the RFH. If the key fob is recognized as belonging to the vehicle and is inside the vehicle, the system allows the ignition state of the vehicle to be changed by the operator between ACCESSORY, RUN, and START.
• Used to broadcast the start button status

Light Emitting Diode (LED) Indicator Operation:

The LEDs in the START/STOP KIN button provide visual indication of the ignition system and button use to aid the driver. The Logic for LED control is implemented in the RFH. The communication of the LED control logic from the RFH to the KIN is done over the LIN bus.

The START/STOP KIN button contain four LEDs:

• OFF Indication
• ACC Indication (Accessory)
• ON Indication (ON or RUN)
• Ignition Switch Indicator (button backlight)

The LEDs indicate the vehicle ignition position and as such are driven by the CAN-C signals related to the ignition position.

The RFH will log a Diagnostic Trouble Code (DTC) indicating an incorrect ignition status value is present; in this state the ignition status is unknown. This will continue until the correct signal is received by the RFH.

Refer to COMPONENT INDEX .

• The PDC houses various fuses used in the starting of the vehicle as well as relays such as the starter solenoid relay and the Engine Start Stop (ESS) ignition relay.

Refer to COMPONENT INDEX .

The PCM:

• Receives input from the hood ajar switch #2 indicating the status of the hood (open or closed).
• Turns on the high side of the PCM starter relay
• Turns the crank hold signal to true enabling the BCM to turn on the low side of the starter relay
• Disables double start over ride once the engine is started

Refer to COMPONENT INDEX .

The RFH:

• Receives the input request to start from the ignition
• Energizes the key transponder in the key fob in order to read it
• Sends a random code to the transponder and in return, receives a minikrypt code from the transponder
• Validates the key fob using LF antennas
• Receives and validates transmission in park via Shift Lock switch (remote start use only)
• Validates that the brake is engaged
• Sends a request to the BCM to change the ignition state

Refer to COMPONENT INDEX .

• The key fobs are used to start the remote vehicle start request and that requests authentication process by identifying the key transponder.
• The key fob can also be used to terminate a remote start request.

Refer to COMPONENT INDEX .

• The RSA is used to provide a greater range for remote start operation and is connected to, and monitored by the RFH. The RFH will perform self diagnostics on the attached RSA to determine if it is connected to the RFH and drawing current.

Refer to COMPONENT INDEX .

Coolant Temperature Sensor - Used to verify that the engine coolant temperature is within an acceptable range for engine operation.

Ajar Switches - Used to indicate if any vehicle access points on the vehicle or opened or closed. Outputs to the BCM. Challenged by the RFH.

ESL - An added layer of security that locks the column.

Fuel Level Sensor and Fuel Pump Control Module - Signalled by the PCM to drive the fuel pump to support engine starting if a sufficient amount of fuel is detected.

Hazard Switch - The hazard switch needs to be in the OFF position.

Ignition State - The ignition needs to be in the OFF state.

IBS: The IBS interacts with the BCM by means of the LIN bus communications. The BCM is its master node. The IBS is used to give information about raw battery current, voltage, and temperature levels. The battery needs to be at an acceptable charge level

LF Antennas - Used in validation of the key fob being preset during start request.

Oil Pressure Sensor - Used to determine that the engine has an acceptable oil pressure range prior to starting the engine.

Transmission Range Sensor (TRS) - Used to indicate the position of the gear shift lever.

Vehicle Speed Sensor (VSS) - Used to verify the vehicle is not moving.

Vehicle Theft Alarm (VTA) or Intrusion Detection System (IDS) - Signal sent indicating the status of the VTA or the IDS system. An active VTA or IDS state will disable the remote start function.