obdii code P0887 TCM Power Relay Control Circuit High - Smart Car Forums
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post #1 of 7 (permalink) Old 08-27-2009, 08:12 AM Thread Starter
 
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obdii code P0887 TCM Power Relay Control Circuit High

Just got this obdii code on my smart. Does anyone have an idea what this is or whats happening?
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post #2 of 7 (permalink) Old 08-27-2009, 08:19 AM
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Got this on several generic code listings: P0887 TCM Transmission Control Module Power Relay Control Circuit High
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post #3 of 7 (permalink) Old 08-27-2009, 10:12 AM Thread Starter
 
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That is why I titled the post "obdii code P0887 TCM Power Relay Control Circuit High" I'm aware of what the code means, but I dont know why its comming up and how to fix it.
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post #4 of 7 (permalink) Old 08-27-2009, 01:09 PM
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Quote:
...have an idea what this is...
Sorry, took that literally.
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post #5 of 7 (permalink) Old 08-27-2009, 01:20 PM Thread Starter
 
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No prob =)
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post #6 of 7 (permalink) Old 09-02-2009, 05:54 PM Thread Starter
 
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just an update..... went to mercedes today... the one in riverside, ca.... walters mercedes, they looked up the code, told me word for word what the code meant ( which I already knew ) then blamed it on my autometer digital controler. FYI an autometer digital controler doesnt control anything its just a fancy name for a tach =( Here I stand, lost as ever.
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post #7 of 7 (permalink) Old 09-04-2009, 02:37 PM
 
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Originally Posted by pitstopautoinc View Post
Just got this obdii code on my smart. Does anyone have an idea what this is or whats happening?
Here is what DAS list as to P0887. Will list this step by step so sorry if confusing. I am also going to assume you are seing this code in the N15/6 module, not sure if your reader list that.

Check battery voltage range between 11v to 14v

Test prerequisite:
Inspect wiring at connectors at connection points for loose contacts, corrosion, damage and short circuts. Repair and replace as required.

Checks to be performed:
Actuation of relay N10/10k9 (Automated manual transmission relay)

Das then switchs to a control panel that allows us to cycle the relay on and off to test for acutuation of the relay and see if the voltage changes.

If it test ok you are done, no more test available.

If it fails then possible cause could be a bad N15/6 module, and it recommends to replace the N15/6 module.

Sorry not much to go on but least you know what the dealer knows now.

I will say that from working on these things for a year and a half now they are VERY sensitive about other electronics being in the system, and even if does not look like you could be effecting something there is a lot going on behind the scene that might be acting up.
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