Description And Operation: Notes
DESCRIPTION - STANDARD LOCK
A power operated door and tailgate lock system is standard factory-installed equipment on this vehicle. The power lock system allows all of the doors and the tailgate to be locked or unlocked electrically. Locking or unlocking the vehicle using the power lock system can be accomplished by three different methods:
Power Lock System - Operating a power lock system switch on either front door inside trim panel will lock or unlock the latches of the doors and the tailgate. The following components comprise the power lock system:
| 1 | Refer to: BODY CONTROL MODULE (BCM) . |
| 2 | Refer to: UCONNECT® RADIO SCREEN . |
| 3 | Refer to: POWER LOCK MOTOR - Integrated into the door latches and the tailgate latch. |
| 4 | Refer to: INSTRUMENT PANEL CLUSTER (IPC) . |
| 5 | Refer to: ANTI-LOCK BRAKING SYSTEM (ABS) MODULE . |
| 6 | Refer to: POWERTRAIN CONTROL MODULE (PCM) . |
| - | Refer to: POWER LOCK SWITCH . |
| - | Refer to: AJAR SWITCH - Integrated into the door latches and the tailgate latch. |
| - | Refer to: TRANSMISSION CONTROL MODULE (TCM) - Automatic Transmission TCM is integral to the transmission. |
| - | Refer to: LOCK CYLINDER - Doors, Fuel Door, Glove Compartment, Tailgate. |
DESCRIPTION - REMOTE KEYLESS ENTRY (RKE)
In addition to the power lock components, the Remote Keyless Entry (RKE) system also includes the following components:
| 1 | Refer to: HORNS . |
| 2 | Refer to: RADIO FREQUENCY HUB (RFH) . |
| 3 | Refer to: TURN SIGNAL LAMPS . |
| - | Refer to: KEY FOB . |
Pressing the Lock or Unlock button of the RKE transmitter can also be used to lock or unlock the latches of the doors and the tailgate. The specific locks operated and the number of key fob presses required varies depending upon the customer programmable settings chosen by the vehicle operator.
DESCRIPTION - PASSIVE ENTRY (PE) SYSTEM
In addition to the components listed in the power lock and RKE overviews, the PE system also includes:
| 1 | Refer to: LOW FREQUENCY (LF) ANTENNA - four total located throughout this vehicle. |
| 2 | Refer to: SMART DOOR HANDLE - Tactile Handle Switches. |
| 3 | Refer to: RADIO FREQUENCY HUB (RFH) . |
The PE system allows the vehicle to be unlocked without the use of a key or a press of a key fob button. The front door handles are equipped with a tactile door locking request button and a capacitive touch sensor arranged inside the handle. When contacting these buttons, a valid key fob signal is identified in that same zone and is used to lock or unlock the doors. This feature allows the customer to passively unlock the doors.
OPERATION
Power Locks
The power lock system uses non-switched battery current received through a fused B(+) fuse in the BCM so that the system remains operational regardless of the status of the ignition switch. The BCM is the primary power lock system controller.
When the BCM receives a lock/unlock input, it responds to these request messages by providing the appropriate outputs to each of the power lock motors to lock or unlock each of the door latches. The BCM also monitors electronic message inputs indicating automatic transmission gear selector position and vehicle speed for tailgate power lock operation.
The BCM also stores the power lock system Customer Programmable feature settings received over the Controller Area Network (CAN) data bus from the radio screen. The BCM uses these settings and internal programming along with hard wired and electronic message inputs to determine the proper outputs needed to produce each of the appropriate power lock system features.
The power lock system circuits are continually monitored and controlled by the microprocessor and software contained within the BCM. When the BCM monitors a problem in any of the power lock system circuits or components, it stores a fault code or Diagnostic Trouble Code (DTC) in its memory circuit.
Remote Keyless Entry
The RKE system uses non-switched battery current received through a fused B(+) fuse so that the system remains operational regardless of the ignition switch position. The RFH is the primary RKE system controller along with the BCM. The RFH validates each RKE transmission and sends a CAN request to the BCM to unlock/lock the vehicle. It ignores requests from any transmitter for which it has no stored vehicle access code. When the BCM receives a valid request from the RFH, it uses internal programming to provide the appropriate hard wired outputs to invoke the proper RKE system features and responses.
The RKE system circuits and transmitter inputs are continually monitored by the RFH. When the RFH monitors a problem in any of the RKE system circuits or transmitters, it stores a DTC in its memory circuit.
Passive Entry
In the Passive Entry Keyless Go (PEKG) system the doors are unlocked passively; however, they must still be locked actively after exiting the vehicle using the tactile Lock button on either front door smart handle or the tailgate handle switch. When the system senses a hand approaching the capacitive switch in the handle or detects a button press of the tailgate switch, it sends out challenge messages through the LF antennas to authenticate the presence and location of a valid key fob.
The key fob responds by sending a Ultra High Frequency (UFH) message back to the receiver within the RFH. If the RFH determines the key fob is valid and that it is located outside the vehicle in the same zone or vicinity as the door handle or tailgate handle switch being activated, it sends an electronic Unlock Request message over the CAN data bus to the BCM to automatically unlock and allow entry.
The PEKG system circuits and key fob inputs are continually monitored by the software contained within the RFH. When the RFH monitors a problem in any of the PEKG system circuits or key fob inputs, it stores a DTC in its memory circuit.
Some features of the Power Lock system:
Automatic Door Locking:
Automatic door locking automatically locks any unlocked door when the vehicle speed exceeds about 20 Kilometers Per Hour (KPH) or 13 Miles Per Hour (MPH). This is a Customer Programmable feature. Note that only the doors are considered and not the tailgate or hood.
Automatic Door Unlocking:
Automatic door unlocking automatically unlocks the doors after they were automatically locked when the vehicle speed exceeded about 20 km/h (13 mph), the vehicle speed has returned to zero, the transmission shift lever is in the Neutral or Park positions and the driver side front door is opened. This is a Customer Programmable feature. Note that only the doors are considered and not the tailgate or hood.
Customer Programmable Features:
The vehicle operator interfaces with the BCM, which is the power lock system controller, using a specific Uconnect™ touch screen options menu. The options menu allows the vehicle operator to set or change the power lock system Customer Programmable Features.
Enhanced Accident Response System:
In the event of a vehicle impact that causes airbag deployment but leaves vehicle electrical power intact, the Enhanced Accident Response System (EARS) automatically turns of the supply of fuel to the engine, turns on the interior courtesy lamps, turns on the hazard warning flashers and unlocks the doors after the vehicle speed has returned to zero. This helps emergency responders in their efforts to render the appropriate assistance. The courtesy lamps and hazard flashers remain on as long as the battery has power or until the key is removed from the ignition.
Illuminated Entry:
Automatic illumination of the interior courtesy lamps when the vehicle is unlocked using the power lock system.