VOLVO
ECM-P251900 - A/C Request A Circuit. General Failure Information. No sub type information
System
Motorsteuergerät (ECM)
Volvo-Modelle, für die dieser Fehlercode gilt
Gilt für folgende Modelle:
3 ModelleS60 (2011–), S80 (2007–), V70 (2008–)
Modelle nach Baujahr und Motor anzeigen (9)
- Volvo S60 (2011–)2011–2012Nur Motor: B5254T5
- Volvo S80 (2007–)2007–2008Nur Motor: B5254T6
- Volvo S80 (2007–)2009Nur Motor: B5254T6, B5254T8
- Volvo S80 (2007–)2010–2011Nur Motor: B5254T10, B5254T11, B5254T8
- Volvo S80 (2007–)2012Nur Motor: B5254T10
- Volvo V70 (2008–)2008Nur Motor: B5254T6
- Volvo V70 (2008–)2009Nur Motor: B5254T6, B5254T8
- Volvo V70 (2008–)2010–2011Nur Motor: B5254T10, B5254T11
- Volvo V70 (2008–)2012Nur Motor: B5254T10
Was bedeutet der Fehlercode?
The engine control module sets the stroke volume of the A/C compressor through a control valve (solenoid) driven by a PWM signal. The code is checked when A/C is switched on, and it is stored when the signal from the control valve is outside the limits the control module uses. This may be due to a short in the signal wire, an open circuit in the supply wire or a damaged control valve.
Mögliche Ursachen
- Signal cable shorted to supply voltage
- Signal cable short-circuited to ground
- Open circuit in the voltage supply cable
- Damaged control valve (solenoid)
Was Sie tun können
- 1If you have a diagnostic tool, activate the A/C compressor and read the control valve drive signal in live data
- 2Check that the relevant fuses are intact
- 3Check the connector to the control valve in the A/C compressor for contact resistance and oxidation
- 4Use a multimeter to check that the signal wire to the control valve has no open circuit and is not short-circuited to plus or to ground (body)
- 5If the fault remains, have a workshop with diagnostic equipment check the control valve in the A/C compressor
Symptome, die Sie bemerken können1
- Uneven cooling from the A/C system
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.