Was bedeutet der Fehlercode ECM-688D?

Diagnose und Fehlercodedefinition für ECM-688D (Volvo C30 (2007–2013), Volvo S40 (2004–2013), Volvo V50 (2004–2013)). Steuergerätereparatur bei OBD Tuning.

VOLVO

ECM-688D - By-pass valve intercooler. Signal missing

System

Motorsteuergerät (ECM)

Volvo-Modelle, für die dieser Fehlercode gilt

Gilt für folgende Modelle:

3 Modelle

C30 (2007–2013), S40 (2004–2013), V50 (2004–2013)

Modelle nach Baujahr und Motor anzeigen (3)

Was bedeutet der Fehlercode?

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.

Mögliche Ursachen

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

Was Sie tun können

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

Symptome, die Sie bemerken können1

Check engine lamp lit or behaving abnormally

Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.