A common issue for Volkswagen owners is encountering the Vcds Fault Code 00287, which indicates a problem with the right rear wheel speed sensor. This article outlines a successful troubleshooting process for this specific fault code, focusing on a wiring issue found in a Volkswagen model.
Locating the Problem: Wiring Harness Under the Passenger Side Rear Door
The solution to this particular 00287 fault code was found in an unlikely location: the wiring harness beneath the passenger side rear door sill. This trim piece, located where the carpet meets the body, conceals the wiring for the right rear speed sensor. Volkswagen, in this particular model, not only changed the wire colors (grey to black and blue to brown) but also incorporated a splice in this area. This splice was the culprit behind the fault code.
Testing the Wheel Speed Sensor: Voltage Checks
Before pinpointing the broken splice, a voltmeter was used to test the functionality of the speed sensor. For reference, a working left rear speed sensor was measured first. It showed 12V between the two wires in its connector. One lead of the voltmeter was then grounded to the car body, and the other lead was used to probe each wire of the right rear speed sensor connector individually.
One wire consistently read 12V, indicating a constant power supply. The other wire showed a fluctuating millivolt signal when the wheel was turned slowly. This confirmed that the sensor itself (likely a reluctor type) was functioning correctly and sending a signal to the ABS module. While some sources suggest testing for AC voltage, this successful diagnosis used DC voltage.
The right rear speed sensor connector, however, showed no voltage between its black and brown wires, clearly indicating a problem. Further investigation revealed the broken splice in the wiring harness mentioned earlier.
Repairing the Broken Splice: Reconnecting the Wires
After locating the broken splice in the wiring harness under the passenger side rear door sill, the wires were repaired and reconnected. Subsequent testing of the right rear speed sensor connector then showed the expected 12V reading, confirming the problem was resolved. Clearing the 00287 fault code with VCDS should complete the repair.
Conclusion: A Simple Fix for a Frustrating Problem
The VCDS fault code 00287, often related to the right rear wheel speed sensor, can be caused by various issues. This case highlights a less obvious culprit: a broken wire splice hidden within the wiring harness under the passenger side rear door sill. By systematically testing the sensor with a voltmeter and thoroughly inspecting the wiring, the problem was diagnosed and resolved. This solution demonstrates that sometimes, the most frustrating car problems have surprisingly simple solutions.
