2014 CTS & 2015-16 SRX Key Fob & TPMS Failure: The Access Module Fix
This guide explains why your key fob, remote start, and even your tire pressure system might be failing due to the Vehicle Access Control Module and why programming is essential.
- This module (part #13594683) is for vehicles WITHOUT passive entry (smart key). Verify your car has RPO code AQQ before buying.
- Programming by a dealer or qualified shop with GM's SPS software is mandatory after installation. The part is not plug-and-play.
- Symptoms include a non-working key fob, failed remote start, and a "Service Tire Monitor System" message, as this module controls both systems.
- Before replacing the module, check the key fob battery and ask a technician to inspect the module's antenna connection, as per TSB 16-NA-061.
Symptoms of a Failing Access Control Module
When the access control module begins to fail, you may experience a range of frustrating electrical issues. Because this module handles both keyless entry and TPMS signals, symptoms can appear related to both systems.
- Key Fob Inoperative or Has Poor Range: The most common symptom is your key fob not working at all or only working when you are extremely close to the vehicle.
- Remote Start Not Working: The remote start function may fail to engage, even if other buttons on the fob work.
- "Service Tire Monitor System" Message: Since the module processes TPMS signals, a failure can cause the TPMS warning light to illuminate and the tire pressure display to show dashes instead of readings.
- "No Fob Detected" Message: The vehicle may not recognize that the key fob is inside, preventing you from starting the car with the push-button ignition.
- Associated Diagnostic Trouble Codes (DTCs): A professional scan tool may reveal codes stored in the Body Control Module (BCM). Common codes related to this issue include C0750, C0755, C0760, and C0765, all indicating a loss of signal from TPMS sensors. Other relevant codes for keyless entry faults can include B3101, B3106, and B3119.
Pro Tip: Before assuming the module is bad, always replace the battery in your key fob. A weak fob battery can cause identical symptoms. Also, check your owner's manual for a feature called "Transport Mode," which intentionally disables keyless entry to save the vehicle's battery during long-term storage and can be accidentally activated.
Known Issues, Recalls, and Technical Service Bulletins (TSBs)
While this specific module has not been the subject of a direct recall, there are related service bulletins and a key-related recall that owners of the 2014 Cadillac CTS and 2015-2016 Cadillac SRX should be aware of.
Technical Service Bulletin 16-NA-061: RKE and TPMS Problems
This is the most relevant TSB for this part. It addresses complaints of a short-range key fob, a "Service Tire Monitor System" message, and a "No Fob Detected" message. The bulletin suggests the cause is often not the module itself, but a poor or disconnected coaxial antenna cable leading to the module. The antenna is typically located near the rear windshield. Before replacing the module, a technician should inspect this connection, as it can be a much simpler fix.
Safety Recall 14172 / 14497: Ignition Key Rotation (2014 CTS)
This important safety recall applies to the 2014 Cadillac CTS (and older models) with a traditional key. It does not apply to the push-button start SRX. The recall addresses a defect where the design of the ignition key allows it to be accidentally bumped out of the "run" position while driving, which can shut off the engine and disable the airbags. The remedy provided by GM was to issue new key rings that create more distance between the key and the fob, reducing the chance of a driver's knee making contact. While unrelated to the module's electronics, it is a critical safety issue for the key system in these vehicles.
Compatibility Warning: This module (part number 13594683) is for vehicles WITHOUT the passive entry system (also called Keyless Open or smart key). Passive entry allows you to unlock the doors by touching the handle without pressing the fob button. You can verify your vehicle's options by checking the Service Parts Identification sticker, usually located in the trunk near the spare tire or in the glove box. Look for the RPO code AQQ (standard Remote Keyless Entry). If you see ATH or AVJ (Passive Entry/Keyless Open), this is the wrong module for your car.
Buying a Used Vehicle Access Control Module
Given the low cost of a new OEM module, buying used is primarily about availability. However, if you choose to buy a used module, there are critical factors to consider.
- Verify the Part Number: Absolutely confirm the part number is 13594683. Several different modules were used, and they are not interchangeable.
- Confirm Vehicle Options: As mentioned in the warning above, this part is for non-passive entry vehicles. Ask the seller for the VIN of the donor car to verify its RPO codes if possible, or ensure you have checked your own vehicle's RPO sticker for code AQQ.
- Inspect for Damage: Check the module's housing for cracks and the connector pins for any signs of corrosion or water damage. These modules are often located in the trunk area and can be susceptible to moisture if there are any water leaks.
- Factor in Programming Costs: A used module is not plug-and-play. It will be completely non-functional until it is programmed to your vehicle's VIN and security system. This requires a trip to a dealer or a qualified shop, which adds significant cost to the repair.
Programming and Installation
Physical installation of the module is simple, but programming is complex and requires special tools.
Module Location
The RCDLR is typically located in the rear of the vehicle. On the 2014 CTS and 2015-2016 SRX, it is generally found in the trunk, behind the right-side trim panel or near the C-pillar. You will need to remove interior panels to access it. It is a small black box with one electrical connector.
Programming is Mandatory
You cannot install this module without programming it. The process requires a dealer or a well-equipped independent shop that has a subscription to GM's Service Programming System (SPS). During programming, the module is configured to your vehicle's specific VIN and learns the security information from the Body Control Module (BCM) and immobilizer system. Attempting to install it without programming will result in the keyless entry system not working and may even cause a no-start condition.
Warning: Do not confuse module programming with key fob programming. The DIY 30-minute relearn procedures found online are for teaching the car to accept a new *key fob* when you already have a working system. They will NOT work for programming a new or used *module*.
Cost Comparison
| Part Type | Estimated Cost |
|---|---|
| New OEM (GM 13594683) | $40 - $70 |
| Used OEM | $25 - $50 |
| New Aftermarket | Not commonly available |
| Shop Labor (Installation & Programming) | $125 - $250 |
Frequently Asked Questions (FAQ)
Do I have to go to a Cadillac dealer for programming?
Not necessarily, but it's the safest bet. Many independent auto repair shops and some specialized automotive locksmiths have the required GM SPS software subscription and can perform the programming. Always call ahead and confirm they can program a new or used Remote Control Door Lock Receiver for your specific Cadillac model.
My key fob stopped working. Is it definitely this module?
No. The most common cause is a dead battery in the key fob itself. The second most likely cause, according to GM's own service bulletins, is a disconnected antenna wire leading to the module. These possibilities should be investigated before replacing the module.
What is the difference between standard and passive keyless entry?
Standard Remote Keyless Entry (RPO code AQQ) requires you to press a button on the key fob to lock or unlock the doors. Passive Keyless Entry (RPO codes ATH or AVJ) allows you to unlock the door simply by touching the handle, as long as the key fob is nearby (e.g., in your pocket or purse). This module, 13594683, is for the standard system.
Where is the access control module located on my 2014 CTS or 2015-2016 SRX?
It is located in the rear of the vehicle, most likely in the trunk area behind the right-side trim panel. You will need to remove some interior trim to access it. It is a small black plastic box with a single wiring connector.
Technical Specifications
OEM Part Numbers: 13594683
Also known as Remote Control Door Lock Receiver (RCDLR). Operates on 433 MHz frequency for vehicles without passive entry (RPO AQQ).
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Cadillac CTS:
- Cadillac SRX:
- 🛍️ Shop This Part
- Symptoms of a Failing Access Control Module
- Known Issues, Recalls, and Technical Service Bulletins (TSBs)
- Technical Service Bulletin 16-NA-061: RKE and TPMS Problems
- Safety Recall 14172 / 14497: Ignition Key Rotation (2014 CTS)
- Buying a Used Vehicle Access Control Module
- Programming and Installation
- Module Location
- Programming is Mandatory
- Cost Comparison
- Frequently Asked Questions (FAQ)
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