VOLVO
ECM-688D - By-pass valve intercooler. Signal missing
System
Motorstyring (ECM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
3 modellerC30 (2007–2013), S40 (2004–2013), V50 (2004–2013)
Vis modeller per årsmodell og motor (3)
Hva betyr feilkoden?
The engine control module (ECM) monitors the charge air cooler bypass valve and how it works. If the module registers a fault in the PWM signal between itself and the bypass valve, the code is set, and it can also be set if the temperature in the output stage for the bypass valve becomes too high.
Mulige årsaker
- Loose connection, contact resistance or oxidation in the terminals
- Open circuit in the power supply
- Open circuit in the signal wire
- Damaged bypass valve
- The bypass valve binds or has jammed, which can cause the output stage to overheat
Hva du kan gjøre
- 1Check the plug at the ECM and at the bypass valve for loose contact, contact resistance and oxidation
- 2With the ignition off and the connector disconnected, use a multimeter to check that the supply and signal wires are intact
- 3Check that the bypass valve has no visible damage or dirt that could make it bind
- 4Read the code, clear it and road test the car; if the code returns, have a workshop replace the bypass valve
Symptomer du kan merke1
- Check engine lamp lit or behaving abnormally
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