VOLVO
ECM-1836 - Relay, engine coolant heater 2. Signal too low
System
Motorsteuergerät (ECM)
Volvo-Modelle, für die dieser Fehlercode gilt
Gilt für folgende Modelle:
2 ModelleS40 (1996–2004), V40 (1996–2004)
Modelle nach Baujahr und Motor anzeigen (2)
Was bedeutet der Fehlercode?
The engine control module (ECM) has registered that the control signal to the relay for engine coolant heater 2 is too low. The relay switches the electric coolant heater in the cooling system. The code is most often caused by an open circuit or a short to ground in the wire, but a defective relay can also set it.
Mögliche Ursachen
- Open circuit in the control wire to the relay for coolant heater 2
- Control wire short-circuited to ground
- Defective relay for engine coolant heater 2
Was Sie tun können
- 1Read and clear the fault code, then check whether it returns
- 2Check that the fuse for engine coolant heater 2 is intact
- 3Check that the relay sits firmly in the fuse and relay box in the engine compartment and that its contacts are not oxidised
- 4Use a multimeter to check that the wire to the relay has no open circuit and is not short-circuited to ground (body)
- 5If you have a diagnostic tool, activate engine coolant heater 2 and listen for the relay to click
Symptome, die Sie bemerken können1
- No noticeable symptoms for the driver
Was der Fehler beeinflussen kann1
- The control module assumes a fixed value for the relay instead of the actual signal
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.