Hankiss
Senior Member
- Joined
- Feb 13, 2011
- Messages
- 48
- Reaction score
- 14
- Location
- London, UK
- Your Mercedes
- W221 350s s-class, W204 220 CDI AMG sport, Jeep G.Cheeroke 2.7CDI
Hello everyone.
My wife’s 2009 W204 2.2 CDI has developed an issue related to the glow plugs. The Engine Management Light appeared on the dash along with the glow plug warning light (which stayed on for about a minute). I used Star Diagnosis to scan the car and it indicated that cylinders 2, 3, and 4 have an open circuit. Please refer to the attached screenshot for details.
However, when I tested the glow plugs with a multimeter (while they were still in the car), all the glow plugs showed a resistance of 0.8 to 0.9 Ohms. The wiring from the plugs to the fuel temperature sensor and the loop appears to be in good condition.
I have not yet checked the Pre-Glow CDI module (N3.9), which is located at the back of the engine and is somewhat difficult to access. Is it possible that the Pre-Glow Output module has failed? Are there any other methods to test this module? Please share your knowledge. Any advice or insights would be greatly appreciated.
Thanks for reading.
My wife’s 2009 W204 2.2 CDI has developed an issue related to the glow plugs. The Engine Management Light appeared on the dash along with the glow plug warning light (which stayed on for about a minute). I used Star Diagnosis to scan the car and it indicated that cylinders 2, 3, and 4 have an open circuit. Please refer to the attached screenshot for details.
However, when I tested the glow plugs with a multimeter (while they were still in the car), all the glow plugs showed a resistance of 0.8 to 0.9 Ohms. The wiring from the plugs to the fuel temperature sensor and the loop appears to be in good condition.
I have not yet checked the Pre-Glow CDI module (N3.9), which is located at the back of the engine and is somewhat difficult to access. Is it possible that the Pre-Glow Output module has failed? Are there any other methods to test this module? Please share your knowledge. Any advice or insights would be greatly appreciated.
Thanks for reading.
