A faulty ABS module can trigger warning lights and compromise braking performance. While professional repair or replacement is an option, a DIY approach can save money. This post details a successful ABS module repair, highlighting key steps and challenges.
Identifying the Issue: ABS Module Failure
The ABS module’s circuit board is susceptible to moisture damage. A deteriorated gasket sealing the circuit board can allow moisture ingress, leading to corrosion and solder joint failures. This can manifest as intermittent or persistent ABS warning lights. In this case, the faulty gasket showed signs of disintegration in multiple areas.
DIY Repair Process
The repair involved several steps:
Circuit Board Repair
The circuit board was carefully removed from the ABS module. All major solder points were inspected and resoldered to address potential connection issues caused by missing solder or corrosion. Excess flux was applied, and the board was cleaned with rubbing alcohol to remove any rust or debris.
Gasket Replacement
The damaged gasket was replaced with a new one, using black RTV gasket maker to ensure a proper seal and prevent future moisture intrusion. While the recommended cure time for the RTV sealant is 24 hours, the module was reassembled and tested after a shorter period due to time constraints.
Reassembly and Testing
The ABS module was reassembled, ensuring all connections were secure. Initial testing showed no ABS warning lights for the first 40 miles, a significant improvement over the previous 5-10 miles before the warning light reappeared. This suggests the repair successfully addressed the underlying issue.
Challenges and Considerations
Accessing the ABS module mounting bolts proved challenging without a lift. Removing the entire ABS metal carrier from the frame provided better access. Additionally, a specific T20 Torx bit was crucial for removing the module, emphasizing the importance of having the correct tools for this task. While the repair was successful, using excessive flux and a shorter cure time for the RTV sealant are not recommended practices.
Cost Savings
Sending the ABS module for remanufacture would have cost $150 plus shipping. This DIY repair saved a significant amount of money.
