2005-2012 Acura RL Window Switch & Door Module: No Programming Needed, Just This Reset

Symptoms of a Failing 2005-2012 Acura RL Door Control Module

Because the module is part of the master window switch, symptoms usually appear as a loss of control over windows, locks, or mirrors. It's important to distinguish between a faulty module and other related parts like window motors or wiring.

• Partial or Complete Loss of Control: The most common symptom is when you can no longer operate one or more windows, the door locks, or mirrors from the driver's master switch. Often, the individual window switches on the other doors will still work, pointing to a failure in the main driver's unit.
• Intermittent Functionality: The switches may work one moment and not the next. This can be caused by failing internal contacts or cracked solder joints within the switch assembly.
🎬 Learn how to test master window switches for shorts and corrosion
• Window "Auto Up/Down" Fails: The one-touch automatic function for the driver's or passenger's window may stop working. This can be a sign of the module failing, but it is also a common symptom that occurs after the vehicle's battery has been disconnected and simply requires a reset.
• No Response and No Sound: When you press a switch, you hear no click from the relay and the corresponding part (window motor, lock actuator) does not move.

Known Issues, TSBs, and Recalls

While there are no major recalls specifically for the door control module on the 2005-2012 Acura RL, there are some related items of note:

• Acura TSB 05-005: Released in 2005, this early service bulletin was a product update for the "Front Door Speakers and Driver's MPCS Unit." The MPCS (Multiplex Integrated Control System) unit is the door module. This indicates that Acura was aware of potential issues with the electronics in the driver's door on early production models.
• Keyless Access Handle Failure: A known issue on these models involves the keyless entry sensor in the exterior door handle shorting out. This can cause a parasitic battery drain, make the handle feel warm, and repeatedly blow the No. 7 (10A) fuse. While not part of the module itself, it can cause confusing electrical problems that seem related.
• No Recalls for This Part: The numerous recalls issued for this generation of Acura RL primarily concern the Takata airbag inflators and are not related to the door control module.

Buying a Used Door Control Module for Your Acura RL

Given the high cost of a new OEM module, a used unit is an excellent value. Here’s what you need to know to buy the right one.

1. Match Your Part Number Exactly

The part number is printed on a sticker on the side or bottom of the switch assembly. While several part numbers were used over the years, they are generally interchangeable, with later numbers representing updated versions. The latest known part number is 38860-SJA-A04, which supersedes A01, A02, and A03. Ordering the newest version you can find is always a good idea. Matching the part number ensures that all your vehicle's specific options (like power-folding mirrors or memory seats) will function correctly.

2. Physical Inspection

When buying a used module, inspect it for:

• Switch Condition: Check that the buttons are not excessively worn, cracked, or sticky. The physical switches can fail just as often as the electronics.
• Connector Pins: Look at the electrical connector ports. The pins should be straight, clean, and free of any green or white corrosion, which would indicate water damage.
• Casing Integrity: Ensure the plastic housing is not cracked or broken, which could allow moisture and dirt to enter.

3. Why Used OEM is a Smart Choice

For a complex electronic part like this, a used Original Equipment Manufacturer (OEM) part is often a better choice than a new, cheap aftermarket alternative. An OEM part was designed and tested by Acura for your specific vehicle, ensuring perfect fitment and communication with the car's other electronic systems. Aftermarket modules can sometimes have issues with feature compatibility or long-term reliability.

Programming and Installation Guide

Step-by-Step Window Reset Procedure

This procedure must be performed after installing the new module or any time the battery is disconnected. You will need to do this for each of the four windows.

1. Turn the ignition to the ON (II) position.
2. Go to the door of the window you are resetting (e.g., the front passenger door). Use that door's own switch for the reset.
3. Press and hold the window switch down until the window is fully open. Continue holding the switch down for 2-5 seconds after it reaches the bottom.
4. Pull and hold the window switch up until the window is fully closed. Continue holding the switch up for 2-5 seconds after it is fully closed.
5. The auto up/down function for that window should now be restored and work from both the master switch and the local switch.
6. Repeat this process for the other three windows.

Cost of Replacement (2005-2012 Acura RL)

Frequently Asked Questions (FAQ)