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Old 06-08-2017, 11:31 AM
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RED ABC WARNING INTERMITTENTLY

I have strange issues with my ABC. I think my car is possessed by an poltergeist! May need to get in touch with the priest.



It would be great to fix this my self with help and guidance from members on this forum.

My Mercedes SL55 AMG 2004, keeps throwing up a red ABC warning.
It is OK first thing in the morning, but after a 2 mile or so drive I have to park up for 5 mins and switch the engine off. On startup after a few seconds the red ABC pops up.
The other day had a different journery, drove approx 6 miles-no issues. Stopped and switched engine off. On restart got white ABC light on for aprrox 2 miles before the red warning came back.

Background info
On first startup, I am able to do upteen cycles of up and down, and even a rodeo for the full duration holding about 150 bar of pressure. So probably this elminates the pump as suspect.

Using STAR have checked the ABC controller, i.e. put a volt meter on the pressure sensor under different conditions and compared it to the reading on STAR, which read the same voltages. Shorted the Red & Yellow wire on the sensor and STAR read 255 bars. So I know the ABC controller is correctly interperating the voltage readings from the ABC sensor.

Read 5 volts going into the sensor between the red & brown wire with the key on.
Read 1.78 Volts between the yellow & brown wires with engine running.

Can anyone help with more tests to resolve the issue please.
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Old 06-09-2017, 03:59 AM
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Join Date: Jun 2017
Posts: 2
I was recommeded that a chap called ILUVMILS can help me here to source out what the issue is.
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