Scheme 32
Diagnostic Starting Point - Keyless Entry
Begin the system diagnosis with the Diagnostic System Check - Vehicle in Vehicle DTC Information. The Diagnostic System Check will provide the following information
- The identification of the control modules which command the system
- The ability of the control modules to communicate through the serial data circuit
- 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.
Scan Tool Output Controls
| Scan Tool Output Control | Menu Selection | Description |
|---|---|---|
| One Key Fob | Program Key Fobs | The Remote Keyless Entry system (Transmitter, Radio Antenna Module, Rear Integration Module) programs one transmitter. |
| Two Key Fobs | Program Key Fobs | The Remote Keyless Entry system (Transmitter, Radio Antenna Module, Rear Integration Module) programs two transmitters. |
| Three Key Fobs | Program Key Fobs | The Remote Keyless Entry system (Transmitter, Radio Antenna Module, Rear Integration Module) programs three transmitters. |
| Four Key Fobs | Program Key Fobs | The Remote Keyless Entry system (Transmitter, Radio Antenna Module, Rear Integration Module) programs four transmitters. |
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 - Vehicle in Vehicle DTC Information. Use the Scan Tool Data List only after the following is determined
- There is no published DTC procedure nor published symptom procedure for the customer concern.
- 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 Parameter | Data List | Units Displayed | Typical Data Value |
|---|---|---|---|
| Ignition On, Engine Off | |||
| 8-Digit GM Part Number | Module Information | 8 digit number | 25665573 |
| # of Fob's Programmed | Key Fob Information | Number | 4 |
| Calibration ID | Module Information | 4 digit number | 5573 |
| Invalid Transmitter | Key Fob Information | Number | 0 |
| Key Pressed on Fob | Key Fob Information | Lock, Unlock, Panic, Fuel, Rear Compartment | Unlock |
| Last Fob Used | Key Fob Information | Number | 1 |
| PROM ID | Module Information | 4 digit number | 8073 |
Scan Tool Data List
Circuit Description
The LOW battery detection is handled inside the transmitter. The transmitter sends a battery condition signal to the remote control door lock receiver (RCDLR) when the transmitter buttons are pressed.
DTC Descriptor
This diagnostic procedure supports the following DTC
DTC B3109 Keyless Entry Transmitter Low Battery
Conditions for Setting the DTC
This code shall be set after 3 consecutive low battery signals from the same programmed transmitter.
Action Taken When DTC Sets
The body control module (BCM) stores DTC B3109 in memory.
Conditions for Clearing the DTC
This code is cleared as current when a normal transmitter voltage signal is received from any programmed transmitter.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
- 3: This step identifies the key fob # (transmitter) with a low battery signal.
- 4: This step verifies that the battery replacement corrected the fault.
| Step | Action | Yes | No |
|---|---|---|---|
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 | Install a scan tool. Turn ON the ignition, with the engine OFF. Select the display DTC function on the scan tool in the remote function actuation menu. Does the scan tool indicate that DTC B3109 is current? | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections |
| 3 | With the scan tool, observe the Key Fob Low Voltage parameters for each transmitter in the Key FOB Information data list to identify the programmed transmitters that set the DTC. Replace the batteries on the indicated transmitters. Did you complete the batteries replacement? | Go to Step 4 | |
| 4 | Use the scan tool in order to clear the DTCs. Operate for 3 consecutive times the transmitters that had the battery replaced. Does the DTC reset? | Go to Step 5 | System OK |
| 5 | Inspect for poor connections at the battery connections of the transmitters that set the DTC. Did you find and correct the condition? | System OK | Go to Step 6 |
| 6 | Replace the transmitters. Ensure that the replacement transmitters is the correct model for the vehicle. All transmitters must be programmed at the same time. Refer to Transmitter Programming . Did you complete the replacement? | Go to Step 7 | |
| 7 | Use the scan tool in order to clear the DTCs. Operate the replaced transmitters 3 consecutive times. Does the DTC reset? | Go to Step 8 | System OK |
| 8 | IMPORTANT: When replacing the remote control door lock receiver (RCDLR), perform the transmitter programming procedure. Replace the RCDLR. Refer to Control Module References .Did you complete the replacement? | System OK |
| IMPORTANT |
|---|
| When replacing the remote control door lock receiver (RCDLR), perform the transmitter programming procedure. |
DTC B3109
Symptoms - Keyless Entry
| IMPORTANT | The following steps must be completed before using the symptom tables. |
- Perform «Diagnostic System Check - Vehicle»(/cadillac/srx/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) in Vehicle DTC Information 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.
- Review the system operation in order to familiarize yourself with the system functions. Refer to «Keyless Entry System Description and Operation»(/cadillac/srx/i-2003-2009/remont/door-locks-anti-theft-systems/#keyless-entry-system) .
Visual/Physical Inspection
- Inspect for aftermarket devices which could affect the operation of the Keyless Entry System. Refer to «Checking Aftermarket Accessories»(/cadillac/srx/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__checking-aftermarket-accessories) in Wiring Systems.
- 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
- «Panic Mode Inoperative»(/cadillac/srx/i-2003-2009/remont/door-locks-anti-theft-systems/#keyless-entry-system__panic-mode-inoperative)
- «Keyless Entry System Inoperative»(/cadillac/srx/i-2003-2009/remont/door-locks-anti-theft-systems/#keyless-entry-system)
Panic Mode Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | With the keyless entry transmitter, attempt to operate the panic function. Do both the horns and the park lamps pulse on and off? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | 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 horns pulse on and off? | Go to Diagnostic Starting Point - Lighting Systems in Lighting Systems | Go to Diagnostic Starting Point - Horns in Horns |
Panic Mode Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 | Press each button of the transmitter one at a time. Does the system operate normally? | Go to Testing for Intermittent Conditions and Poor Connections | 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 | Go to Diagnostic Starting Point - Doors |
| 4 | IMPORTANT: Inspect that the keyless entry transmitter is the correct model for the vehicle remote system. A wrong model transmitter may pass this test, but will not activate the vehicle remote system. Turn on the J 43241 Keyless Entry Tester. See Special Tools . Place the transmitter on the J 43241 test pad. See Special Tools . Press each button of the transmitter one at a time. Does a tone sound and the green light illuminate on the J 43241 after each button is pressed? See Special Tools . | Go to Step 9 | Go to Step 5 |
| 5 | Do any of the buttons on the transmitter sound the tone and illuminate the green light when pressed? | Go to Step 8 | Go to Step 6 |
| 6 | Replace the transmitter battery. Did you complete the replacement? | Go to Step 7 | |
| 7 | Turn on the J 43241 . See Special Tools . Place the transmitter on the J 43241 test pad. See Special Tools . Press each button of the transmitter one at a time. Does a tone sound and the green light illuminate on the J 43241 after each button is pressed? See Special Tools . | Go to Step 11 | Go to Step 8 |
| 8 | Replace the transmitter. Did you complete the replacement? | Go to Step 9 | |
| 9 | IMPORTANT: All transmitters which are to be recognized by the keyless entry system 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. Perform the programming procedure. Refer to Transmitter Programming .Did the locks cycle to lock then unlock? | Go to Step 11 | Go to Step 10 |
| 10 | IMPORTANT: When replacing the antenna module, perform the transmitter programming procedure. Refer to Control Module References . Replace the driver side antenna module. Refer to Control Module References .Did you complete the replacement? | Go to Step 11 | |
| 11 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
| IMPORTANT |
|---|
| Inspect that the keyless entry transmitter is the correct model for the vehicle remote system. A wrong model transmitter may pass this test, but will not activate the vehicle remote system. |
| IMPORTANT |
|---|
| All transmitters which are to be recognized by the keyless entry system 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. |
| IMPORTANT |
|---|
| When replacing the antenna module, perform the transmitter programming procedure. Refer to Control Module References . |
Keyless Entry System Inoperative
Removal Procedure
- Insert a coin into the slot on the battery access cover on the back of the transmitter.
- Turn the coin counterclockwise to remove the transmitter rear cover.
- Remove the battery.
Installation Procedure
- Install a GM P/N 90541381 battery type or equivalent.
- Install the transmitter rear cover.
- Test the transmitter operation.
Transmitter Programming
| IMPORTANT | All transmitters which are to be recognized by the radio antenna module 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 keyless entry program mode. This prevents the programming of the transmitters to the incorrect vehicle. The order in which the transmitters are programmed is important. The first transmitter programmed will become Driver #1, and the second transmitter programmed will become Driver #2. The number on the back of the transmitter is for reference only. Additional unnumbered transmitters are also available. Use care to program the transmitters correctly. |
To program transmitters
- Install a scan tool.
- Turn ON the ignition, with the engine OFF.
- Use the scan tool menu Body, RFA, Special Functions, Program Key Fobs in order to access transmitter programming.
- Follow the directions on the scan tool in order to program the transmitters.
- Operate the transmitter functions of each transmitter in order to verify correct system operation.
The keyless entry system is a supplementary vehicle entry device. 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 radio antenna module
When you press a button on a transmitter, the transmitter sends a RF signal to the radio antenna module. The module interprets the signal and activates the requested function via a class 2 message over the serial data line.
Unlock Driver 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.
- Flash the exterior lights (if selected ON in personalization).
- Disarm the content theft deterrent (CTD) system.
- Deactivate the CTD system when in the Alarm Mode.
- Recall the memory seat and memory mirror positions for that driver.
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 exterior lights (if selected ON in personalization).
- Chirp the horn (if selected ON in personalization).
- Recall the memory seat and memory mirror positions for that driver.
Lock All Doors
Press the LOCK button in order to perform the following functions
- Lock all of the doors.
- Momentarily illuminate the interior lamps.
- Flash the exterior lights (if selected ON in personalization).
- Chirp the horn (if selected ON in personalization).
- Arm the content theft deterrent (CTD) system.
Panic Alarm
| IMPORTANT | On export vehicles, the alarm function may not automatically reset after 30 seconds. The operator must cancel the alarm using one of the methods listed below. |
A single press of the panic button performs the following functions
- Illuminates the interior lamps.
- Pulses the horn.
- Flashes the head lamps.
All of the above will continue for 30 seconds or until any of the following conditions occur
- The panic button is pressed again.
- The ignition switch is turned to the RUN position with a valid key.
- The vehicle is unlocked with the key.
Keyless Entry Personalization
The exterior lamps and horn chirp may be personalized for two separate drivers as part of remote activation verification. For mode descriptions and programming instructions, refer to Driver Personalization in Personalization.
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 radio antenna module are synchronized to the appropriate order. If a programmed transmitter sends a signal that is not in the order that the radio antenna module 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.
Automatic Synchronization
The keyless entry transmitters do not require a manual synchronization procedure. If needed, the transmitters automatically resynchronize when any button on the transmitter is pressed within range of the vehicle. the transmitter will operate normally after the automatic synchronization.
Special Tools
Special Tools Illustration Tool Number/ Description J 43241 Keyless Entry Tester
Scheme 33
See also:
• Diagnostic System Check - Vehicle
• Testing for Intermittent Conditions and Poor Connections
• Control Module References
• Checking Aftermarket Accessories
• Diagnostic Starting Point - Lighting Systems
• Diagnostic Starting Point - Horns
• Diagnostic Starting Point - Doors
• Driver Personalization
• Transmitter Programming
• Keyless Entry System Description and Operation
• Panic Mode Inoperative
• Special Tools