Keyless Entry System Buick Rendezvous I

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Scheme 112

Keyless Entry Connector End Views

Remote Control Door Lock Receiver Connector End (RCDLR) Connector Part Information 12064993 6-Way F Micro-Pack 100 Series (BLK) Pin Wire Color Circuit No. Function 5 ORN 640 Battery Positive Voltage 6 BLK/WHT 1455 Keyless Entry Program Enable Signal 7 - - Not Used 8 BLK 1550 Ground 9 - - Not Used 10 PPL 218 Keyless Entry Antenna Signal

Diagnostic Starting Point - Keyless Entry

Begin the system diagnosis with Diagnostic System Check - Remote Keyless Entry . The Diagnostic System Check will provide the following information

1. The identification of the control module(s) which command the system
2. The ability of the control module(s) to communicate through the serial data circuit
3. The identification of any stored diagnostic trouble codes (DTCs) and their status

The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

1. 2: Lack of communication may be due to a partial malfunction of the class 2 serial data circuit or due to a total malfunction of the class 2 serial data circuit. The specified procedure will determine the particular condition.
2. 5: The presence of DTCs which begin with "U" indicate some other module is not communicating. The specified procedure will compile all the available information before tests are performed.

Diagnostic System Check - Remote Keyless Entry

Scan Tool Output Controls

Scan Tool Output Controls

Scan Tool Data List

The Keyless Entry Scan Tool Data List contains all of the keyless entry related parameters that are available on the scan tool. The parameters in the list are arranged in alphabetical order. The column, "Data List," indicates the location of the parameter within the scan tool menu selections. Use the Keyless Entry Scan Tool Data List as directed by a diagnostic table or in order to supplement the diagnostic procedures. Begin all of the diagnostic procedures with Diagnostic System Check - Remote Keyless Entry .

Use the Scan Tool Data List only after the following is determined

1. There is no published DTC procedure nor published symptom procedure for the customer concern.
2. The DTC or symptom diagnostic procedure indicated by the diagnostic system check does not resolve the customer concern.

The Typical Data Values are obtained from a properly operating vehicle under the conditions specified in the first row of the Scan Tool Data List table. Comparison of the parameter values from the suspect vehicle with the Typical Data Values may reveal the source of the customer concern.

Scan Tool Data List

Diagnostic Trouble Code (DTC) List

Diagnostic Trouble Code (DTC) List

Circuit Description

The remote control door lock receiver (RCDLR) communicates with the body control module (BCM) through the keyless entry serial data circuit. When any button on the keyless entry transmitter is pressed, the transmitter sends a signal to the RCDLR. The RCDLR sends a lock, unlock, or panic alarm request to the BCM, depending on which button is pressed on the transmitter. The BCM receives the message and performs the appropriate function. The BCM also uses the keyless entry serial data circuit in order to communicate with the RCDLR when programming transmitters.

Conditions for Running the DTC

1. The ignition is ON.
2. The system voltage is at least 9 volts and no more than 16 volts.
3. This condition can only occur during transmitter programming.

Conditions for Setting the DTC

The BCM does not receive an acknowledgment message from the RCDLR within 300 milliseconds of a second Programming Mode/Diagnostic Mode request.

Action Taken When the DTC Sets

The BCM stores DTC B3101 in memory.

Conditions for Clearing the DTC

1. A current DTC will clear when the fault is no longer present and the ignition switch is cycled.
2. A history DTC will clear after 100 consecutive ignition cycles without a fault present.
3. A scan tool may be used to clear history and current DTC(s).

Diagnostic Aids

1. Always begin diagnosis with the first DTC listed on the scan tool.
2. Perform a visual inspection for loose or poor connections at all related components.
3. If the DTC B3101 is a history DTC, the fault may be intermittent. Refer to «Testing for Intermittent Conditions and Poor Connections»(/buick/rendezvous/i-2001-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor) in Wiring Systems.

The number below refers to the step number on the diagnostic table.

1. 3: This step checks for a short to voltage.

DTC B3101

The remote control door lock receiver (RCDLR) communicates with the body control module (BCM) through the keyless entry serial data circuit. When any button on the keyless entry transmitter is pressed, the transmitter sends a signal to the RCDLR. The RCDLR sends a lock, unlock, rear release, or panic alarm request to the BCM, depending on which button is pressed on the transmitter. The BCM receives the message and performs the appropriate function. The BCM also uses the keyless entry serial data circuit in order to communicate with the RCDLR when programming transmitters.

1. The ignition is ON.
2. The system voltage is at least 9.0 volts and no more than 16.0 volts.

1. The keyless entry serial data circuit is shorted to ground.
2. The above conditions must be met for approximately 300 milliseconds.

The keyless entry system will not operate.

1. A current DTC will clear when the fault is no longer present and the ignition switch is cycled.
2. A history DTC will clear after 100 consecutive ignition cycles without a fault present.
3. A scan tool may be used to clear history and current DTC(s).

The number below refers to the step number on the diagnostic table.

1. 3: This step checks the keyless entry serial data circuit for voltage supplied by the body control module (BCM).

DTC B3102

The remote control door lock receiver (RCDLR) communicates with the body control module (BCM) through the keyless entry serial data circuit. When any button on the keyless entry transmitter is pressed, the transmitter sends a signal to the RCDLR. The RCDLR sends a lock, unlock, rear release, or panic alarm request to the BCM, depending on which button is pressed on the transmitter. The BCM receives the message and performs the appropriate function. The BCM also uses the keyless entry serial data circuit in order to communicate with the RCDLR when programming transmitters.

1. The system voltage is at least 9.0 volts and no more than 16.0 volts.
2. The BCM must be receiving a message from the RCDLR while in the program mode.

The BCM detects a short to voltage in the keyless entry serial data circuit.

The keyless entry system will not operate.

1. A current DTC will clear when the fault is no longer present and the ignition switch is cycled.
2. A history DTC will clear after 100 consecutive ignition cycles without a fault present.
3. A scan tool may be used to clear history and current DTC(s).

1. Always begin diagnosis with the first DTC listed on the scan tool.
2. Perform a visual inspection for loose or poor connections at all related components.
3. If the DTC B3103 is a history DTC, the fault may be intermittent. Refer to «Troubleshooting with a Test Lamp»(/buick/rendezvous/i-2001-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures) in Wiring Systems.

The number below refers to the step number on the diagnostic table.

1. 3: B+ voltage should be present on the serial data terminal when tested with a DMM, but should not illuminate the test lamp. An illuminated test lamp indicates a short to voltage in the serial data circuit.
2. 4: This step checks for a short to voltage in the keyless entry serial data circuit.

DTC B3103

The remote control door lock receiver (RCDLR) communicates with the body control module (BCM) through the keyless entry serial data circuit. When any button on the keyless entry transmitter is pressed, the transmitter sends a signal to the RCDLR. The RCDLR sends a lock, unlock, rear release, or panic alarm request to the BCM, depending on which button is pressed on the transmitter. The BCM receives the message and performs the appropriate function. The BCM also uses the keyless entry serial data circuit in order to communicate with the RCDLR when programming transmitters.

The Body Control Module detects an invalid message from the RCDLR (a message with a parity error).

The BCM stores DTC B3106 in memory.

1. A current DTC will clear when the fault is no longer present and the ignition switch is cycled.
2. A history DTC will clear after 100 consecutive ignition cycles without a fault present.
3. A scan tool may be used to clear history and current DTC(s).

DTC B3106

Symptoms - Keyless Entry

1. Perform «Diagnostic System Check - Remote Keyless Entry»(/buick/rendezvous/i-2001-2007/remont/door-locks-anti-theft-systems/#keyless-entry-system) before using the Symptom Tables in order to verify that all of the following are true: There are no DTCs set. The control module(s) can communicate via the serial data link.
2. Review the system operation in order to familiarize yourself with the system functions. Refer to «Keyless Entry System Description and Operation»(/buick/rendezvous/i-2001-2007/remont/door-locks-anti-theft-systems/#keyless-entry-system) .

Visual/Physical Inspection

1. Inspect for aftermarket devices which could affect the operation of the Keyless Entry System. Refer to «Checking Aftermarket Accessories»(/buick/rendezvous/i-2001-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures__checking-aftermarket-accessories) in Wiring Systems.
2. 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 Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom

1. «Panic Mode Inoperative»(/buick/rendezvous/i-2001-2007/remont/door-locks-anti-theft-systems/#keyless-entry-system__panic-mode-inoperative)
2. «Keyless Entry System Inoperative»(/buick/rendezvous/i-2001-2007/remont/door-locks-anti-theft-systems/#keyless-entry-system)

Panic Mode Inoperative

Panic Mode Inoperative

The number below refers to the step number on the diagnostic table.

1. 16: B+ voltage should be present on the serial data terminal when tested with a DMM, but should not illuminate the test lamp. An illuminated test lamp indicates a short to voltage in the serial data circuit.

Keyless Entry System Inoperative

Removal Procedure

1. Remove the upper trim pad. Refer to «Trim Pad Replacement - Instrument Panel (I/P) Upper (Aztek)»(/buick/rendezvous/i-2001-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) or «Trim Pad Replacement - Instrument Panel (I/P) Upper (Rendezvous)»(/buick/rendezvous/i-2001-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) in Instrument Panel, Gages and Console.
2. Disconnect the remote control door lock receiver electrical connector (1).
3. Remove the remote control door lock receiver (2) from the defroster air duct.

Installation Procedure

1. Install the remote control door lock receiver (2).
2. Engage the remote control door lock receiver retainers.
3. Connect the remote control door lock receiver electrical connector (1).
4. Install the upper trim pad. Refer to «Trim Pad Replacement - Instrument Panel (I/P) Upper (Aztek)»(/buick/rendezvous/i-2001-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) or «Trim Pad Replacement - Instrument Panel (I/P) Upper (Rendezvous)»(/buick/rendezvous/i-2001-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) in Instrument Panel, Gages and Console.
5. If a new remote control door lock receiver is being installed, program the transmitter. Refer to «Transmitter Programming»(/buick/rendezvous/i-2001-2007/remont/door-locks-anti-theft-systems/#keyless-entry-system__transmitter-programming) .

Transmitter Battery Replacement

Under normal use, the battery in the remote control door lock transmitter will last about 2 years.

The battery is weak if the transmitter does not work at the normal range in any location. If you have to get close to the vehicle before the transmitter works, change the battery.

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1. Insert a dime or a flat-bladed tool into the slot on the side of the transmitter in order to disassemble the transmitter.
2. Twist the dime or tool in order to separate the halves.
3. Remove the battery from the transmitter.

1. Install the battery into the transmitter.
2. Reassemble the transmitter.
3. Ensure that the halves snap together tightly in order to prevent water intrusion.
4. Test for proper transmitter operation. Refer to «Keyless Entry System Description and Operation»(/buick/rendezvous/i-2001-2007/remont/door-locks-anti-theft-systems/#keyless-entry-system) .

Transmitter Programming

1. Install a scan tool.
2. Use the scan tool in order to access the Body Control Module (BCM) Special Function or Module Setup: Program Key Fobs.
3. Press the START soft key on the scan tool. IMPORTANT: The scan tool must stay connected until all of the transmitters are programmed.
4. Press and hold the LOCK button and the UNLOCK button simultaneously on one transmitter. After a delay of 5-10 seconds, the scan tool will indicate that the transmitter is programmed.
5. Repeat the previous step in order to program up to 4 transmitters.
6. Remove the scan tool.
7. Operate the transmitter functions in order to verify correct system operation.

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

1. The door locks, including the rear compartment.
2. The illuminated entry lamps
3. The panic alarm

The Keyless Entry System has the following main components

1. The transmitters
2. 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.

Unlock Driver's Door Only

Momentarily press the UNLOCK button in order to perform the following functions

1. Unlock the driver door only.
2. Illuminate the interior lamps for a predetermined amount of time or until the ignition is turned ON.
3. 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

1. Unlock the remaining doors.
2. Illuminate the interior lamps for a predetermined amount of time or until the ignition is turned ON.
3. Flash the park lamps.

Lock All Doors

Press the LOCK button in order to perform the following functions

1. Lock all of the doors.
2. Immediately turn off the interior lamps.
3. Chirp the horn, if the LOCK button is pressed a second time within 5 seconds.

Rear Compartment Lid Release

Press the Rear Release button twice within 2 seconds in order to perform the following functions

1. Unlock the rear compartment.
2. 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

1. Illuminates the interior lamps
2. Pulses the horn
3. Flashes the headlamps
4. Flash the park lamps

The panic alarm continues for a predetermined amount of time or until either of the following occur

1. The panic button is pressed again.
2. 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. Refer to Transmitter Battery Replacement for battery replacement procedures.

Rolling Code

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.

Transmitter Resynchronization

Resynchronization may be necessary due to the security method used by this system. The transmitter does not send the same signal twice to the receiver. The receiver will not respond to a signal that has been sent previously. This prevents anyone from recording and playing back the signal from the transmitter.

To resynchronize your transmitter, stand close to your vehicle and press and hold the lock and unlock buttons on the transmitter at the same time for 15 seconds. The door locks should cycle to confirm synchronization. If the locks do not cycle, see your dealer for service.

Special Tools

Special Tools Illustration Tool Number/Description J 43241 Keyless Entry Tester

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See also:
• Scan Tool Does Not Power Up
• Power Mode Mismatch
• Diagnostic Trouble Code (DTC) List
• Testing for Intermittent Conditions and Poor Connections
• Circuit Testing
• Wiring Repairs
• Connector Repairs
• Troubleshooting with a Test Lamp
• Testing for a Short to Voltage
• Checking Aftermarket Accessories
• Diagnostic System Check - Horns
• Diagnostic System Check - Lighting Systems
• Power Door Locks Inoperative (Aztek)
• Power Door Locks Inoperative (Rendezvous)
• Symptoms - Body Rear End
• Testing for Continuity
• Trim Pad Replacement - Instrument Panel (I/P) Upper (Aztek)
• Diagnostic System Check - Remote Keyless Entry
• Symptoms - Keyless Entry
• Diagnostic Trouble Code (DTC) List
• Transmitter Programming
• Panic Mode Inoperative
• Transmitter Battery Replacement
• Transmitter Resynchronization