SECTION 9T1
REMOTE KEYLESS ENTRY AND ANTI-THEFT SYSTEM
Caution : Disconnect the negative battery cable before removing or installing any electrical unit or when a tool or equipment could easily come in contact with exposed electrical terminals. Disconnecting this cable will help prevent personal injury and damage to the vehicle. The ignition must also be in LOCK unless otherwise noted.
SPECIAL TOOLS
Special Tools Table
SCHEMATIC AND ROUTING DIAGRAMS
Remote Keyless Entry System with Anti-Theft System
DIAGNOSIS
Symptoms -Keyless Entry
Important : The following steps must be completed before using the symptom tables.
There are no DTCs set.
The control modules can communicate via the serial data link.
Review the system operation in order to familiarize yourself with the system functions. Refer to Keyless Entry System Description and Operation.
Visual/Physical Inspection
- Inspect for aftermarket devices which could affect the operation of the Keyless Entry System.
- Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
Intermittent
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Section 9A, Body Wiring System/Testing for Intermittent Conditions and Poor Connections.
Panic Mode Inoperative
| Step | Action | Value(s) | Yes | No |
| 1 | Did you perform the Diagnostic System Check - Vehicle? | - | Go to Step 2 | Check the vehicle with the scan tool. |
| 2 | With the keyless entry transmitter, attempt to operate the panic function. Do the horns and the headlamps pulse on and off? | - | | Go to Step 3 |
| 3 | Do any of the panic functions operate? | - | Go to Step 4 | Go to Keyless Entry System Inoperative |
| 4 | Do the headlamps pulse on and off? | - | | |
Keyless Entry System Inoperative
| Step | Action | Value(s) | Yes | No |
| 1 | Did you perform the Diagnostic System Check - Vehicle? | - | Go to Step 2 | Check the vehicle with the scan tool. |
| 2 | Press each button of the transmitter one at a time. Does the system operate normally? | - | | Go to Step 3 |
| 3 | Lock and unlock the door locks using the controls inside the vehicle. Do the locks operate properly? | - | Go to Step 4 | |
| 4 | Operate the rear compartment lid release from the control inside the vehicle. Does the rear compartment lid release operate properly? | - | Go to Step 5 | |
| 5 | Operate the transmitter within range of the vehicle. Do all of the keyless entry functions operate normally? | - | Go to Step 19 | Go to Step 6 |
| 6 | Important : All transmitters which are to be recognized by the remote control door lock receiver (RCDLR) must be programmed in a single programming sequence. If the system is placed in program mode, it will erase all previously programmed transmitters upon the receipt of the programming signal from the ?rst transmitter. Perform the programming procedure. Refer to Transmitter Programming. Did you hear the body control module (BCM) chime to con?rm that the transmitter programming has been completed? | - | Go to Step 19 | Go to Step 7 |
| 7 | - Turn OFF the ignition.
- Disconnect the RCDLR.
- Connect a test lamp between the battery positive voltage circuit of the RCDLR and a good ground.
Does the test lamp illuminate? | - | Go to Step 8 | Go to Step 15 |
| 8 | Connect a test lamp between the battery positive voltage circuit of the RCDLR and the RCDLR ground circuit. Does the test lamp illuminate? | - | Go to Step 9 | Go to Step 16 |
| 9 | - Disconnect the test lamp.
- Connect a DMM between the keyless entry serial data circuit and the RCDLR ground circuit.
- Turn ON the ignition, with the engine OFF.
- Observe the voltage.
Does the DMM indicate the speci?ed value? | B+ | Go to Step 10 | Go to Step 11 |
| 10 | - Turn ON the ignition, with the engine OFF.
- Connect a test lamp between the keyless entry serial data circuit and the RCDLR ground circuit.
Does the test lamp illuminate? | - | Go to Step 13 | Go to Step 14 |
| 11 | Test the keyless entry serial data circuit for the following conditions: - An open
- A high resistance
- A short to ground
Did you find and correct the condition? | - | Go to Step 19 | Go to Step 12 |
| 12 | Inspect for poor connections at the harness connector of the RCDLR. Did you ?nd and correct the condition? | - | Go to Step 19 | Go to Step 17 |
| 13 | Repair the short to voltage in the keyless entry serial data circuit. Did you complete the repair? | - | Go to Step 19 | Go to Step 17 |
| 14 | Inspect for poor connections at the harness connector of the BCM. Did you find and correct the condition? | - | Go to Step 19 | Go to Step 18 |
| 15 | Repair the open, high resistance, or short to ground in the battery positive voltage circuit of the RCDLR. Did you complete the repair? | - | Go to Step 19 | - |
| 16 | Repair the open or high resistance in the RCDLR ground circuit. Did you complete the repair? | - | Go to Step 19 | - |
| 17 | Important : Perform the keyless entry transmitter programming procedure when replacing the RCDLR. Replace the RCDLR. Did you complete the replacement? | - | Go to Step 19 | - |
| 18 | Did you complete the replacement? | - | Go to Step 19 | - |
| 19 | Operate the system in order to verify the repair. Did you correct the condition? | - | System OK | Go to Step 3 |
Diagnostic Trouble Code (DTC) B1000
ECU Malfunction
Circuit Description
The internal fault detection is handled inside the control module. No external circuits are involved.
Conditions for Running the DTC
The module runs the program to detect an internal fault when power up is commanded. The only requirements are voltage and ground. This program runs even if the voltage is out of the valid operating range.
Conditions for Setting the DTC
The module has detected an internal malfunction.
Action Taken When the DTC Sets
The module refuses all additional inputs.
Conditions for Clearing the DTC
A current DTC clears when the malfunction is no longer present.
A history DTC clears when the module ignition cycle counter reaches the reset threshold of 50, without a repeat of the malfunction.
Circuit/System Verification
If this DTC is retrieved as a current DTC, replace the module that set the DTC.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair. Refer to
Section 9A, Body Wiring System.And refer to the related module and non-communicating module replacement, setup, and programming.
Diagnostic Trouble Code (DTC) B3105
Keyless Entry System Key Fobs Not Programmed
Circuit Description
DTC B3105 sets if the remote control door lock receiver (RCDLR) has not learned any key fobs.
Conditions for Running the DTC
The remote function actuation (RFA) system must be enabled and a test is ran every time the key is cycled.
Conditions for Setting the DTC
This code is set if there are no learned key fobs in the RCDLR.
Action Taken When the DTC Sets
The RFA system is inoperative.
Conditions for Clearing the DTC
The code is cleared as current when at least one fob is programmed to the RCDLR.
Repair Instructions
Diagnostic Trouble Code (DTC) B3109
Keyless Entry Transmitter 1 or Generic Low Battery
Circuit Description
This fault sets if the key fob programmed to slot 1 has a low battery.
Conditions for Running the DTC
The remote function actuation (RFA) system must be enabled.
Conditions for Setting the DTC
The code sets after 3 consecutive low battery signals from the same programmed transmitter.
Action Taken When the DTC Sets
The RFA system is inoperative.
Conditions for Clearing the DTC
The code is cleared as current when a normal transmitter voltage signal is received from any programmed transmitter.
Repair Instructions
Diagnostic Trouble Code (DTC) B3110
Keyless Entry Transmitter 2 or Generic Low Battery
Circuit Description
This fault sets if the key fob programmed to slot 2 has a low battery.
Conditions for Running the DTC
The remote function actuation (RFA) system must be enabled.
Conditions for Setting the DTC
The code sets after 3 consecutive low battery signals from the same programmed transmitter.
Action Taken When the DTC Sets
The RFA system is inoperative.
Conditions for Clearing the DTC
The code is cleared as current when a normal transmitter voltage signal is received from any programmed transmitter.
Repair Instructions
Diagnostic Trouble Code (DTC) B3111
Keyless Entry Transmitter 3 or Generic Low Battery
Circuit Description
This fault sets if the key fob programmed to slot 3 has a low battery.
Conditions for Running the DTC
The remote function actuation (RFA) system must be enabled.
Conditions for Setting the DTC
The code sets after 3 consecutive low battery signals from the same programmed transmitter.
Action Taken When the DTC Sets
The RFA system is inoperative.
Conditions for Clearing the DTC
The code is cleared as current when a normal transmitter voltage signal is received from any programmed transmitter.
Repair Instructions
Diagnostic Trouble Code (DTC) B3112
Keyless Entry Transmitter 4 or Generic Low Battery
Circuit Description
This fault sets if the key fob programmed to slot 4 has a low battery.
Conditions for Running the DTC
The remote function actuation (RFA) system must be enabled.
Conditions for Setting the DTC
The code sets after 3 consecutive low battery signals from the same programmed transmitter.
Action Taken When the DTC Sets
The RFA system is inoperative.
Conditions for Clearing the DTC
The code is cleared as current when a normal transmitter voltage signal is received from any programmed transmitter.
Diagnostic Trouble Code (DTC) B0155
Lost Communication With Instrument Panel Cluster (IPC) Control Module
Circuit Description
Modules connected to the high and low speed GMLAN serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. The modules have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver module as an availability indication of the transmitter module. Each message contains the identification number of the transmitter module.
The body control module (BCM) activates the serial data communication enable and the accessory wakeup serial data circuits by applying voltage when the ignition key is in ACC, ON or START.
Conditions for Running the DTC
The system voltage is between 9-16 volts.
The vehicle power mode master requires serial data communication to occur.
Conditions for Setting the DTC
A supervised periodic message that includes the transmitter module availability has not been received.
Action Taken When the DTC Sets
The module(s) is never signaled, therefore the specific subsystem(s) will not function.
Conditions for Clearing the DTC
A current DTC clears when the malfunction is no longer present.
A history DTC clears when the module ignition cycle counter reaches the reset threshold of 50, without a repeat of the malfunction.
Diagnostic Aids
Use the DTC Descriptor list above to determine the module which is not communicating.
If there are multiple non-communicating modules choose the one closest to the data link connector (DLC).
Some modules may not have internal protection for specific voltage outputs and may open a battery positive voltage or ignition voltage source fuse. If a voltage input fuse is open and no short is found in that circuit, ensure that no module output voltage circuit is shorted to ground before replacing the module.
This diagnostic can be used for any module that should communicate with high or low speed GMLAN serial data providing the vehicle is equipped with the option that uses that module.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Section 9A, Body Wiring System.And refer to the related module and non-communicating module replacement, setup, and programming.
Diagnostic Trouble Code (DTC) C0569
System Configuration Error
Circuit Description
Modules connected to the high and low speed GMLAN serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. The modules have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver module as an availability indication of the transmitter module. Each message contains the identification number of the transmitter module.
The body control module (BCM) activates the serial data communication enable and the accessory wakeup serial data circuits by applying voltage when the ignition key is in ACC, ON or START.
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
The RCDLR has not undergone the tire type and tire pressure selection setup procedure.
Action Taken When the DTC Sets
The driver information center (DIC) displays the SERVICE TIRE MONITOR warning message.
Conditions for Clearing the DTC
A current DTC will clear when the RCDLR has undergone the setup procedure.
Diagnostic Aids
A newly replaced RCDLR will set DTC C0569 on its initial ignition ON cycle. Tire type and tire pressure selection setup must be performed. Refer to Repair Instructions.
MAINTENANCE AND REPAIR
ON-VEHICLE SERVICE
RFA (Remote Function Actuation) Receiver
Removal Procedure
- Disconnect the negative battery cable.
- Remove the instrument panel steering column opening pillar. Refer to Section 9E, Instrumentation/Driver Information.
- Remove the RFA receiver.
- Disconnect the electrical connector.
Notice : Perform the SPO reprogramming when RFA receiver replaced.
Installation Procedure
- Connect the electrical connector.
- Install the RFA receiver.
- Install the instrument panel steering column opening pillar. Refer to Section 9E, Instrumentation/Driver Information.
- Connect the negative battery cable.
Front Door Tamper and Door Contact Switches
Removal Procedure
- Disconnect the negative battery cable.
- Remove the front door trim panel. Refer to Section 9G, Interior Trim.
- Remove the front door lock with the integral door tamper and door contact switches. Refer to Section 9P, Doors.
Installation Procedure
- Install the front door lock with the integral door tamper and door contact switches. Refer to Section 9P, Doors.
- Install the front door trim panel. Refer to Section 9G, Interior Trim.
- Connect the negative battery cable.
Liftgate Tamper Switch
Removal Procedure
- Disconnect the negative battery cable.
- Remove the liftgate lock cylinder and integral liftgate tamper switch. Refer to Section 9S, Body Rear End.
Installation Procedure
- Install the liftgate lock cylinder and integral liftgate tamper switch. Refer to Section 9S, Body Rear End.
- Connect the negative battery cable.
Inclination Sensor
Removal Procedure
- Disconnect the negative battery cable.
- Remove the front left seat. Refer to Secotion 9H, Seats.
- Disconnect the connector of inclination sensor.
- Remove the inclination sensor from the bracket by sliding the sensor backward.
- Remove the bracket by removing the bolts, if needed.
Installation Procedure
- Install the inclination sensor bracket with bolts.
Tighten
Tighten the inclination sensor bracket bolts to 10 N•m (7 lb-ft).
- Install the inclination sensor on the bracket.
- Connect the connector of inclination sensor.
- Install the the front left seat. Refer to Secotion 9H, Seats.
- Connect the negative battery cable.
Intrusion (Shock) Sensor
Removal Procedure
- Disconnect the negative battery cable.
- Remove the map lamp. Refer to Section 9B, Lighting Systems.
- Disconnect the connector of intrusion sensor.
- Remove screws and the intrusion sensor bracket.
- Remove the intrusion sensor from the map lamp assembly.
Installation Procedure
- Install the inclination sensor and bracket with screws.
- Connect the connector of intrusion sensor.
- Install the map lamp. Refer to Section 9B, Lighting Systems.
- Connect the negative battery cable.
Theft Deterrent Alarm
Removal Procedure
- Disconnect the negative battery cable.
- Remove the ECM bracket. According to engine type refer to Section 1F1 or 1F2, 1F3 Engine Control.
- Remove the left headlamp. Refer to Section 9B, Lighting System.
- Remove the washer reservoir tube.
- Disconnect the electrical connector.
- Remove the nut and the theft deterrent alarm under the battery tray.
Installation Procedure
- Install the theft deterrent alarm with nut under the battery tray.
- Connect the electrical connector.
- Install the washer reservoir tube.
- Install the left headlamp. Refer to Section 9B, Lighting System.
- Install the ECM bracket. According to engine type refer to Section 1F1 or 1F2, 1F3 Engine Control.
- Connect the negative battery cable.
GENERAL DESCRIPTION AND SYSTEM OPERATION
Transmitter Programming
Important : All transmitters which are to be recognized by the remote control door lock receiver (RCDLR) must be programmed in a single programming sequence. If the system is placed in program mode it will erase all previously programmed transmitters upon the receipt of the programming signal from the first transmitter. Up to 4 transmitters can be programmed. Do not operate or program the transmitters in the vicinity of other vehicles that are in the keyless entry program mode. This prevents theprogramming of the transmitters to the incorrect vehicle.
- Install a scan tool.
- From the scan main menu, select service programming system, then follow the instructions on the screen.
Important : The scan tool must stay connected until all of the transmitters are programmed.
- Press and hold the LOCK button and the UNLOCK button simultaneously on one transmitter. After a delay of 5 seconds, the scan tool will indicate that the transmitter is programmed.
- Repeat the previous step in order to program up to 4 transmitters.
- Remove the scan tool.
- Operate the transmitter functions in order to verify correct system operation.
Keyless Entry System
The Keyless Entry System is a supplementary vehicle entry device. Use the Keyless Entry System in conjunction with a door lock key. Radio frequencies or discharged batteries may disable the system.
Keyless entry allows you to operate the following components:
- The door locks, including the rear compartment
- The illuminated entry lamps
- The panic alarm
The Keyless Entry System has the following main components:
- The transmitters
- The remote control door lock receiver (RCDLR)The RCDLR communicates with the body control module (BCM) through the keyless entry serial data circuit. When you press a button on a transmitter, the transmitter sends a signal to the RCDLR. The RCDLR sends a request to the BCM and the BCM performs the appropriate function.
The RCDLR communicates with the body control module (BCM) through the keyless entry serial data circuit. When you press a button on a transmitter, the transmitter sends a signal to the RCDLR. The RCDLR sends a request to the BCM and the BCM performs the appropriate function.
Unlock Drivers Door Only
Momentarily press the UNLOCK button in order to perform the following functions:
- Unlock the driver door only.
- Illuminate the interior lamps for a predetermined amount of time or until the ignition is turned ON.The RCDLR communicates with the body control module (BCM) through the keyless entry serial data circuit. When you press a button on a transmitter, the transmitter sends a signal to the RCDLR. The RCDLR sends a request to the BCM and the BCM performs the appropriate function.
- Flash the park lamps.
Unlock All Doors-Second Operation
Momentarily press the UNLOCK button a second time within 2 seconds of the first press in order to perform the following functions:
- Unlock the remaining doors.
- Illuminate the interior lamps for a predetermined amount of time or until the ignition is turned ON.
- Flash the park lamps.
The alarm will also be activated if the ignition input is changed to battery voltage before either of the following conditions occurs:
- An UNLOCK message was received from the transmitter.
- The front door tamper or the rear deck lid tamper switches indicate key operation.
- The alarm will also be activated if the anti-theft function has been armed and the ultrasonic sensor (optional) detects movement within the vehicle before the front door or rear deck lid tamper switches have indicated key operation.
Lock All Doors
Press the LOCK button in order to perform the following functions:
- Lock all of the doors.
- Immediately turn off the interior lamps.
- Chirp the horn, if the LOCK button is pressed a second time within 5 seconds.
Liftgate Release
Press the Liftgate Release button once in order to perform the following functions:
- Unlock the liftgate.
- Illuminate the interior lamps for a predetermined amount of time or until the ignition is turned ON.
Alarm
A single press of the panic button performs the following functions:
- Illuminates the interior lamps
- Pulses the horn
- Flashes the headlamps
- Flash the park lamps
The panic alarm continues for a predetermined amount of time or until either of the following occur:
- The panic button is pressed again.
- The ignition switch is turned to RUN with a valid key.
Keyless Transmitter Low Battery Warning
The Drivers Message Center will display a warning light if the Keyless Transmitter battery becomes low.
Fault or Alarm Indication
The Keyless Entry System uses rolling code technology. Rolling code technology prevents anyone from recording the message sent from the transmitter and using the message in order to gain entry to the vehicle. The term "rolling code" refers to the way that the Keyless Entry System sends and receives the signals. The transmitter sends the signal in a different order each time. The transmitter and the RCDLR are synchronized to the appropriate order. If a programmed transmitter sends a signal that is not in the order that the RCDLR expects, then the transmitter is out of synchronization. This occurs after 256 presses of any transmitter button when it is out of range of the vehicle.
