VOLVO
ECM-6900 - Malfunction Indicator Lamp (MIL). Faulty signal
System
Engine Control Module (ECM)
Volvo models this fault code applies to
This fault code has different meanings depending on model, model year or engine. Select the meaning that applies to your car.
Applies to the following models:
4 modelsS60 (2001–2009), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)
Show models by year and engine (10)
- Volvo S60 (2001–2009)2006Engine D5244T4, D5244T5, D5244T6, D5244T7 only
- Volvo S60 (2001–2009)2007–2009Engine D5244T4, D5244T5, D5244T7 only
- Volvo V70 (2000–2008)2006Engine D5244T4, D5244T5, D5244T6, D5244T7 only
- Volvo V70 (2000–2008)2007Engine D5244T4, D5244T5, D5244T7 only
- Volvo V70 (2000–2008)2008Engine D5244T5, D5244T7 only
- Volvo V70 XC / XC70 (2001–2007)2006–2007Engine D5244T4 only
- Volvo XC90 (2003–)2006–2007Engine D5244T4 only
- Volvo XC90 (2003–)2008–2010Engine D5244T4, D5244T5 only
- Volvo XC90 (2003–)2011Engine D5244T18, D5244T4, D5244T5 only
- Volvo XC90 (2003–)2012All engines except: B5254T2, B6324S5
What does this fault code mean?
The engine control module (ECM) controls the malfunction indicator lamp (MIL) through an internal power stage. If the module detects a fault in the signal that drives the lamp, with the ignition on, the code is set. The fault may be a lead shorted to voltage or ground, a break in the signal wire, poor contact or an internal fault in the control module.
Possible causes
- Signal wire shorted to supply voltage
- Signal wire shorted to ground
- Contact resistance or oxidation in the connectors
- Open circuit in the signal wire
- Internal fault inside the ECM itself
What you can do
- 1Check that the MIL lights briefly when the ignition is switched on; if it does not, the fault may be in the lamp circuit
- 2Check the connectors at the engine control module and the instrument panel for contact resistance and oxidation
- 3Read the code, clear it and road test the car to see whether it returns
- 4If the fault remains and the connectors are clean, have a workshop check the signal wire and the engine control module
Symptoms you may notice1
- Text message in the information display
What the fault can affect1
- The malfunction indicator lamp (MIL) is off
General guidance for car owners. Diagnosis on the car can point to a different cause.