VOLVO
ECM-4A30 - Starter relay. Signal missing
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
2 modelsS40 (2004–2013), V50 (2004–2013)
Show models by year and engine (2)
What does this fault code mean?
The control module keeps watch on the wire that feeds the coil of the starter motor relay. The code is set when the signal reads high, reads low or disappears, and the fault shows when you try to start the car.
Possible causes
- Break in the signal wire to the starter motor relay
- Damaged starter motor relay
What you can do
- 1Check the fuse for the starter motor relay and that the battery is in good charge
- 2Check the starter motor relay connections for loose contacts and corrosion
- 3Look for breaks, chafing and pinch damage in the signal wire to the starter motor relay
- 4If the fault remains, have a workshop check the relay and the control module with diagnostic equipment
Symptoms you may notice1
- Starter motor does not turn
General guidance for car owners. Diagnosis on the car can point to a different cause.