VOLVO
ECM-688D - By-pass valve intercooler. Signal missing
Układ
Sterownik silnika (ECM)
Modele Volvo, których dotyczy ten kod błędu
Dotyczy następujących modeli:
3 modeleC30 (2007–2013), S40 (2004–2013), V50 (2004–2013)
Pokaż modele wg rocznika i silnika (3)
Co oznacza ten kod błędu?
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.
Możliwe przyczyny
- 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
Co możesz zrobić
- 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
Objawy, które możesz zauważyć1
- Check engine lamp lit or behaving abnormally
Ogólne wskazówki dla właścicieli. Diagnostyka na samochodzie może wskazać inną przyczynę.