Retrofitting cruise control to your Volkswagen Golf Mk5 can significantly enhance your driving experience. This guide provides a detailed walkthrough of the process, utilizing VCDS (Vag-Com Diagnostic System) for configuration. While this modification can be accomplished with careful attention to detail, remember to proceed with caution and consult a professional if needed. This guide is for informational purposes only and we are not responsible for any damages that may occur.
Determining Necessary Components
Before starting the installation, you’ll need to gather the required parts. These may vary depending on your Golf Mk5’s existing equipment.
Steering Control Module Compatibility
The Steering Control Module (SCM), located beneath the steering column, plays a crucial role in enabling cruise control. Identify your current SCM part number (e.g., 1K0-953-549-AE) and consult the Ross-Tech Wiki (http://wiki.ross-tech.com/wiki/index.php/VW_Golf_(1K)_Steering_Wheel_Versions) to determine its compatibility. You’ll need a midline or highline module for cruise control functionality. Lowline modules will require an upgrade.
Slip Ring Compatibility
The slip ring, responsible for transmitting signals from the steering wheel to the SCM, must be compatible with your chosen SCM. Refer to the Ross-Tech Wiki for compatible slip ring part numbers.
Diagnostic Wire
Vehicles manufactured before 2006 might lack the diagnostic wire connecting the SCM to the ECU. This wire is necessary for cruise control operation. Accessing the SCM’s connector (pin 13) will reveal if the wire is present. If absent, a retrofit kit with the necessary wiring will be required.
Cruise Control Stalk
A cruise control stalk is essential for controlling the system. If you require the diagnostic wire, purchasing a complete retrofit kit, including the stalk and wiring, is recommended. A compatible stalk part number is 1K0-054-690-A.
(Image: Example of checking for the diagnostic wire on the steering control module connector)
Installing the Diagnostic Wire (If Necessary)
If your Golf Mk5 lacks the diagnostic wire, follow these steps for installation. This process involves accessing the ECU connector behind the wiper motor.
- Remove Wiper Arms and Scuttle Panel: Carefully remove the wiper arms and the upper scuttle panel to access the area behind the wiper motor.
- Locate the Blue Connector: Identify the blue connector on the ECU housing. This connector houses the necessary pin for the diagnostic wire.
- Unclip and Access Pin 4: Unclip the connector housing and locate the vacant pin 4 position.
- Route the Wire: Route the diagnostic wire from the SCM connector (pin 13) through the firewall and into the cabin, following the existing wiring harness.
- Connect to Pin 4: Carefully insert the wire’s terminal into pin 4 of the blue connector. Ensure a secure connection.
- Reassemble: Reassemble all components in reverse order.
Hardware Installation
- Disconnect Battery: Disconnect the negative terminal of the battery to prevent electrical hazards.
- Remove Steering Column Casing: Remove the steering column casing, taking care to release all clips and screws.
- Detach Airbag: Carefully detach the airbag module, following the proper safety procedures.
- Remove Steering Wheel: Remove the steering wheel using an M12 spline tool.
- Access Steering Control Module: Detach the SCM, noting the connections and orientation.
- Install/Replace Components: Install the new or upgraded SCM, slip ring, and cruise control stalk. Ensure all connections are secure.
(Image: Example of removing the steering wheel)
(Image: Example of accessing the Steering Control Module)
VCDS Coding
After installing the hardware, VCDS is required to enable cruise control.
- Access Steering Wheel Module: Connect VCDS and navigate to Module 16 (Steering Wheel).
- Coding: Enter the appropriate coding based on your vehicle’s options and the Ross-Tech Wiki guidance. An example coding might be 0000032. Click “Do It!”
- Access Engine Module: Navigate to Module 01 (Engine).
- Coding II: Enter the login code 11463 and click “Do It!”
Steering Angle Sensor Reset and Fault Clearing
After coding, a steering fault light might illuminate. This typically requires resetting the steering angle sensor.
- Check Fault Codes: In VCDS, access Module 44 (Steering Assist) and check for fault codes.
- Perform Steering Angle Sensor Basic Setting: Follow the specific procedure for your ABS system (MK60 or MK70) outlined in the Ross-Tech Wiki.
- Perform Steering Limit Stop Adaptation: Follow the procedure outlined in the Ross-Tech Wiki. This involves turning the steering wheel lock-to-lock.
- Clear Fault Codes: Clear any remaining fault codes in Module 44.
(Image: Example of a steering fault light)
Conclusion
Successfully retrofitting cruise control to your Golf Mk5 using VCDS requires careful planning and execution. Following this guide and referring to the Ross-Tech Wiki for specific coding and adaptation procedures will increase your chances of a successful installation. Always prioritize safety and consult a professional if you encounter any difficulties.
