VOLVO
ECM-990F - Torque monitoring. Faulty signal
System
Motorstyring (ECM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
7 modellerC30 (2007–2013), C70 (2006–2013), S40 (2004–2013), S60 (2001–2009), S80 (1999–2006), V50 (2004–2013), V70 (2000–2008)
Vis modeller per årsmodell og motor (13)
- Volvo C30 (2007–2013)2007–2011Kun motor: B5244S4
- Volvo C70 (2006–2013)2006Alle motorer unntatt: B5254T3
- Volvo C70 (2006–2013)2007–2010Kun motor: B5244S4, B5244S5
- Volvo C70 (2006–2013)2011Kun motor: B5244S4
- Volvo S40 (2004–2013)2004Kun motor: B5244S4, B5244S5
- Volvo S40 (2004–2013)2005–2010Kun motor: B5244S4, B5244S5, B5244S7
- Volvo S60 (2001–2009)2003–2006Kun motor: B5244S, B5244S2, B5244S6
- Volvo S60 (2001–2009)2007–2009Kun motor: B5244S, B5244S2
- Volvo S80 (1999–2006)2003–2006Kun motor: B5244S, B5244S2
- Volvo V50 (2004–2013)2004Kun motor: B5244S4, B5244S5
- Volvo V50 (2004–2013)2005–2010Kun motor: B5244S4, B5244S5, B5244S7
- Volvo V70 (2000–2008)2003–2006Kun motor: B5244S, B5244S2, B5244S6
- Volvo V70 (2000–2008)2007–2008Kun motor: B5244S, B5244S2
Hva betyr feilkoden?
The engine control module (ECM) measures engine torque by reading the acceleration of the flywheel and compares it with the torque requested by the accelerator pedal. Here the engine has produced more torque than requested, so the module has limited torque by cutting the fuel. The fault most likely comes from another problem in the system that produces too much torque.
Mulige årsaker
- Air leak after the mass air flow (MAF) sensor
- Fault in the mass air flow (MAF) sensor
- Problem with the electronic throttle unit (ETM)
- Problem with the flywheel sensor
- Problem with variable valve timing (VVT) control
- Exhaust camshaft has jumped teeth
Hva du kan gjøre
- 1Read the fault codes in the engine control module and fault-trace the other codes first, since this code is most likely set together with codes for failing components
- 2Check that the mass air flow sensor hoses and connections are secure and airtight so that no false air enters after the sensor
- 3Check that the connectors to the throttle unit and the flywheel sensor are secure and free from oxidation
- 4With a diagnostic tool, compare the ranking values; a high Worst with a low Latest points to an intermittent fault or one that is not active
- 5Clear the fault code after the repair and road test the car to see whether it returns
Symptomer du kan merke1
- Jerky driving
Hva feilen kan påvirke3
- The cruise control is disengaged while the fault is active
- Engine speed and torque are limited by cutting the fuel supply
- How far they are limited depends on the accelerator pedal position
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