Suzuki ABS Failure: Speed Sensor vs Module Diagnosis

Had similar ABS issues on my 2010 Suzuki Swift with the 1.6L gasoline engine. The diagnostic scan showed an ECM and ABS module communication error. Initially thought it was just a speed sensor, but the problem was more complex. The ABS control unit was getting faulty input signals, causing dashboard warnings and unsafe braking behavior. After thorough testing, the shop found corrosion in the ABS module connector pins, plus internal failure in the control unit itself. This became a serious safety concern requiring immediate attention. The repair involved replacing the entire ABS module and cleaning all related wiring connections. The job took two full days at the shop due to extensive diagnostic work and proper calibration of the new unit. Based on these symptoms, recommend getting a proper diagnostic scan first. The speedometer working doesnt rule out ABS module failure. Given the age and mileage of your MR Wagon, its likely facing similar electronic control unit issues. Would strongly suggest finding a shop specializing in Suzuki ABS systems for accurate diagnosis. Important: Continuing to drive with malfunctioning ABS could compromise braking safety, especially in emergency situations.

Thanks for sharing those details about your Swift ABS repair. My MR Wagon situation sounds really similar, especially the warning lights and braking issues. The transmission shop finally traced it to the input sensor on the ABS module just like yours. Can you let me know what the total repair cost was for your ABS module replacement? Also curious if youve had any other ABS or ECM related problems since getting it fixed. Mine has other issues Im keeping an eye on, so trying to budget for potential future repairs.

Thanks for asking about the follow-up. After having the ABS module replaced and recalibrated, I havent experienced any speedometer or ABS malfunction issues. The Speed signal fault was completely resolved with the new control unit installation. The total repair came to 1000€, which included diagnostic testing, parts, and labor. While it wasnt cheap, the investment was worth it for properly functioning ABS and safer braking. The shop had to order a specific control unit for the Swift model and program it to work with the existing ECM. Since the repair, all warning lights have stayed off and the ABS system works flawlessly. No other electronic issues have surfaced in the past year. The diagnostic tests showed everything communicating correctly after the fix. One tip: Make sure to get a full system diagnostic scan if you notice any new warning lights. Early detection of control unit problems can prevent more expensive repairs down the road.

Thanks for the advice. I finally got my MR Wagon fixed last week. Took it to a certified shop that specializes in ABS systems. They ran a complete diagnostic scan which showed the input sensor was failing, causing the communication issues with the ECM. The repair cost was 850€ total, less than I expected after hearing other stories. They replaced the faulty sensor and cleaned all the connector pins. The whole job took about 4 hours. The ABS light is now off and the braking feels solid again. The speedometer and all other systems are working perfectly. The mechanic also checked the entire brake system while they had it apart and said everything else looks good. Really glad I got this sorted before winter. Having reliable ABS is crucial for safety. Will definitely keep monitoring for any warning lights or unusual behavior from the ECM or sensors going forward.