Volkswagen Jetta III / Golf IV Comfort Control Module 1K0959433CA – Early Fault Signs, Repair and Replacement Guide
Volkswagen Jetta III / Golf IV Comfort Control Module 1K0959433CA – Early Fault Signs, Repair and Replacement Guide
The Volkswagen Comfort Control Module (CCM), part number 1K0959433CA / 5DK008977-07, is the electronic heart of your vehicle’s convenience systems. It controls essential functions like power windows, central locking, interior lighting, alarm system, and keyless entry. A faulty module can cause frustrating issues, but the good news is that many problems are easy to diagnose and repair.
In this blog, we’ll discuss the early signs of a faulty CCM, whether it can be repaired, how a beginner can replace it, and the steps for programming (if needed).
1. Early Signs of a Faulty Comfort Control Module
The CCM often shows clear warning signs before complete failure. Here are the most common symptoms:
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Inconsistent Central Locking:
Doors may fail to lock/unlock with the remote or the interior switch. -
Power Windows Malfunction:
Windows may roll up or down randomly, or fail to respond entirely. -
Alarm System Issues:
False alarms or alarm not triggering. -
Interior Lights Flickering or Staying On:
The courtesy lights may behave abnormally. -
Keyless Entry Not Working:
The remote key may not communicate with the car. -
Battery Drain:
A faulty CCM can cause parasitic battery drain overnight.
2. Can a Faulty CCM Be Repaired?
Yes, in many cases, a CCM can be repaired rather than replaced. Common repair solutions include:
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Cleaning Corroded Connectors:
Moisture or water ingress (often due to clogged sunroof drains) can corrode connectors. Cleaning and applying dielectric grease can restore functionality. -
Re-soldering Loose Joints:
Internal solder points on the PCB can crack due to vibration. A skilled technician can re-solder them. -
EEPROM/Software Fixes:
If the CCM software is corrupted, a reflash or coding reset via VCDS (VAG-COM Diagnostic System) may solve the issue.
Tip: If the module has severe water damage or burnt circuits, replacement is the best solution.
3. How to Replace the Comfort Control Module (Beginner-Friendly Guide)
Tools Required:
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Screwdrivers (Phillips & flathead).
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Ratchet set.
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Plastic trim removal tools.
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VCDS or OBD-II scan tool (optional for coding).
Step-by-Step Replacement:
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Disconnect the Battery:
Always disconnect the negative terminal to prevent short circuits. -
Locate the CCM:
In most Volkswagen Golf IV/Jetta III models, the CCM is located under the dashboard on the driver’s side or beneath the passenger footwell (under the carpet). -
Remove Trim Panels:
Carefully remove the plastic panels and carpeting around the CCM location. -
Unplug Connectors:
Press the locking tabs to remove wiring connectors. -
Remove the Module:
Unscrew or unclip the CCM and take it out. -
Install the New Module:
Place the replacement module (1K0959433CA) in position and reconnect all connectors. -
Reconnect Battery & Test:
Reconnect the battery and check all functions like windows, locks, and lights.
4. How to Program the CCM (If Necessary)
Do All CCM Replacements Require Programming?
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Plug & Play: If you buy a virgin module or a pre-coded unit for your VIN, no programming is needed.
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Used Modules: If you use a second-hand module, you may need to code it to match your car’s features.
Programming Tools:
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VCDS (VAG-COM Diagnostic Tool) – The most common tool to code VW modules.
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ODIS or Dealer Programming – For advanced adaptations.
Basic Coding Steps with VCDS:
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Connect VCDS to the OBD-II port.
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Select 46 – Comfort System from the module list.
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Read and save your old coding (from the old CCM).
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Install the new module and apply the same coding values.
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Perform key matching (if keyless entry issues occur).
5. Final Tips
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Always check for water leaks before installing a new CCM.
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Keep a backup of your module coding using VCDS.
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At Automan Spare Parts, we provide tested and genuine CCM units for Volkswagen models with fast shipping and 30-day warranty.
