ECU runs the motor but won't connect to DAS
Thread Starter
Super Member
Joined: Feb 2009
Posts: 692
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From: Houston, TX
2003 E55 AMG; 2013 GL550 4Matic; 2003 CL600
ECU runs the motor but won't connect to DAS
I need to get the car to pass inspection so that it can be registered, which means clearing and/or resolving the CELs.
But the ECU won't communicate with DAS. Car starts and runs well, other units are accessible with DAS so I know my hardware and the OBDII interface are good.
Wondering if anyone else had a similar issue, and if it required replacing or repairing the ECU?
But the ECU won't communicate with DAS. Car starts and runs well, other units are accessible with DAS so I know my hardware and the OBDII interface are good.
Wondering if anyone else had a similar issue, and if it required replacing or repairing the ECU?
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Joined: Aug 2020
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From: Gretna, NE
'03 SL55 Black, '03 SL500's Aegean, Mars Red, Tazanite, Alabaster, '11 S550 Flint Gray
I don't know if you have already solved your problem, but first make sure that you are running the correct year break in DAS. Mercedes wired some of the ECU K-lines to pin 3 and some to pin 7 on the diagnostic connector and DAS needs to know where to look. If it still doesn't find it, check to make sure that the pins are not pushed out of the connector.
Thread Starter
Super Member
Joined: Feb 2009
Posts: 692
Likes: 73
From: Houston, TX
2003 E55 AMG; 2013 GL550 4Matic; 2003 CL600
Worth mentioning that prior to mailing it for repair, I was able to verify wire continuity from the OBDII port all the way to the ECU, just to be certain.
Thread Starter
Super Member
Joined: Feb 2009
Posts: 692
Likes: 73
From: Houston, TX
2003 E55 AMG; 2013 GL550 4Matic; 2003 CL600
