// Official meaning
Lost communication with the ABS control module — the rest of the car can no longer talk to the ABS ECU on the network.
// On the bench
Nine times out of ten it is the module, not the wiring. The electronic control unit on the pump has failed — vibration, heat and (on vans) water ingress from road spray attacking the connector, PCB tracks and bond wires. We still check power, grounds and the network before condemning anything, because guessing is how expensive mistakes start.
How it shows up
- ABS module missing from a full-system scan
- ABS, traction and ESP lights all on together
- No live data from the ABS ECU
What fixing it involves
Board-level repair of the original ABS ECU so its coding survives — no programming battle with a replacement. Bench-tested for communication, sensor plausibility and pump-driver operation before return.
Frequently asked questions
How do I know it is the module and not a wiring fault?
Proper diagnostics first: power, grounds and network checks. When the feeds are good and the module stays silent, it is the module — which is most of the time. We confirm before quoting.
Can I send just the electronic module rather than the whole pump?
Depends on the design — some modules separate cleanly from the hydraulic block, others should come as one assembly. Tell us the part number and we will say exactly what to send.