VOLVO
ECM-1811 - Vehicle speed signal. Faulty signal
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
2 modelsS40 (1996–2004), V40 (1996–2004)
Show models by year and engine (2)
What does this fault code mean?
The ECM receives the vehicle speed signal from the instrument cluster. If the module registers a fault in that signal, fault code ECM-1811 is set, and the fault may lie in the wiring or in the instrument cluster.
Possible causes
- Open circuit in the signal wire
- Defective instrument cluster
What you can do
- 1Switch off the ignition and check that the connectors on the signal wire are firmly seated and free of oxidation
- 2With a multimeter, check that the signal wire from the instrument cluster has no break
- 3If you have a diagnostic tool: check in live data that the speed signal shows a value when the car is rolling
- 4If fault codes are stored in the instrument cluster's control module, trace those first. A faulty cluster may need replacing by a workshop
Symptoms you may notice1
- The cruise control does not work at all
What the fault can affect1
- Cruise control is switched off
General guidance for car owners. Diagnosis on the car can point to a different cause.