Anyone else have their TMAP sensor die as a result of a CP failure?

Just Ask · 07-04-2018, 12:05 AM

So I grounded the yellow/black wire from the TMAP harness and...no change. Same codes. Not sure what my next step would be other than taking it in to the dealership....

_bdiddyb_ · 07-04-2018, 08:21 AM

Ok. When I grounded the tmap harness, the "drivetrain malfunction" message immediately went away as soon as I turned on the car. But the CEL will stay unless you CLEAR it. Did you clear it with the software tool you have? Before grounding, the car would not let me clear the CEL.

Just Ask · 07-04-2018, 10:30 AM

Quote:

Originally Posted by _bdiddyb_

Ok. When I grounded the tmap harness, the "drivetrain malfunction" message immediately went away as soon as I turned on the car. But the CEL will stay unless you CLEAR it. Did you clear it with the software tool you have? Before grounding, the car would not let me clear the CEL.

Yep. Cleared, codes immediately reappear. Even cleared twice...lol...but no change. Sigh....

Just Ask · 07-04-2018, 10:32 AM

Quote:

Originally Posted by AMG KLR

There's 2 TMAPs, pre throttle and manifold. Maybe the other one was damaged? Use your original or replacement one and see if the code sticks when you change the other

Yep, tried this earlier in the week. It appears that all 3 TMAP sensors I have (1 new one) are functional as I have rotated all 3 through the 2 possible locations - CP and manifold - with no change in error codes.

_bdiddyb_ · 07-04-2018, 10:50 AM

Well...unless you have ISTA in your toolbox, it can tell you exactly where to look. Sometimes you gotta throw in the towel and take it to the dealer. Good luck man. Keep us posted.

JRam24 · 07-04-2018, 06:02 PM

So, not sure if this will help but when I did my mhd flash this happened to me. The culprit was in my sub settings for the map where it gives the option to select 3.5bar (n20) sensor. I selected by mistake without having the upgraded 3.5 bar tmap sensor. Went in reflashed st1 map without that selected and it was immediately cleared/fixed. Check and see if you have that selected if you haven’t upgraded to the 3.5 bar tmap sensors.

Just Ask · 07-04-2018, 10:21 PM

Quote:

Originally Posted by JRam24

So, not sure if this will help but when I did my mhd flash this happened to me. The culprit was in my sub settings for the map where it gives the option to select 3.5bar (n20) sensor. I selected by mistake without having the upgraded 3.5 bar tmap sensor. Went in reflashed st1 map without that selected and it was immediately cleared/fixed. Check and see if you have that selected if you haven’t upgraded to the 3.5 bar tmap sensors.

That's a really great point! But, alas, not selected. Still got dem damn codes...

JRam24 · 07-04-2018, 11:42 PM

Quote:

Originally Posted by Just Ask

That's a really great point! But, alas, not selected. Still got dem damn codes...

Well dang, I was hoping. Might have to bite the bullet and take it in to the stealership.

Just Ask · 09-10-2018, 09:06 PM

Followup:

The issue was that the wire harness from the TMAP sensor in the CP to the ECU had been pulled out of the ECU, thus no signal was being sent. When the CP blew it also dislodged the harness from the intensity of the "explosion" that occurred when the CP blew apart. Indy shop rewired the harness and I am now good to go!

Jeff@TopGearSolutions · 09-13-2018, 09:22 AM

Quote:

Originally Posted by Just Ask

Followup:

The issue was that the wire harness from the TMAP sensor in the CP to the ECU had been pulled out of the ECU, thus no signal was being sent. When the CP blew it also dislodged the harness from the intensity of the "explosion" that occurred when the CP blew apart. Indy shop rewired the harness and I am now good to go!

Wow that must have been pretty violent when it popped off to do that.

Just Ask · 09-13-2018, 11:10 PM

Quote:

Originally Posted by Jeff@TopGearSolutions

Wow that must have been pretty violent when it popped off to do that.

It damn sure was loud!! My initial 50 millisecond thought was a blown tire, then the loss of power told me otherwise. The CP didn't just crack, it shattered...the top 2 inches of pipe were gone. The old harness was fairly short, enough so that the end result is not surprising.

johnung · 09-14-2018, 12:33 PM

Quote:

Originally Posted by Just Ask

Update - Replaced the TMAP sensor in the CP and it had zero effect - same three codes still pop up. If I assume the new TMAP sensor is good, then I am left with trying to diagnose connectivity between the TMAP harness and the DME. Any ideas on how to do this?
I also switched the TMAp sensor in the CP with the MAP sensor in the intake manifold as they are the same part number; no change in codes so then I can assume that both sensors are good and the issue lies elsewhere.
Any advice on what to do at this point?

I think I recall a procedure in my Bentley manual for troubleshooting between DME and TMAP. Unfortunately traveling right now so don't have access to it or I'd send it to you

Just Ask · 09-14-2018, 09:20 PM

Quote:

Originally Posted by johnung

I think I recall a procedure in my Bentley manual for troubleshooting between DME and TMAP. Unfortunately traveling right now so don't have access to it or I'd send it to you

Got it fixed...check my last few posts. Thanks nonetheless!

Broadsword · 02-08-2020, 10:28 AM

Quote:

Originally Posted by johnung

I think I recall a procedure in my Bentley manual for troubleshooting between DME and TMAP. Unfortunately traveling right now so don't have access to it or I'd send it to you

What page is it on? TIA.

johnung · 02-08-2020, 02:03 PM

Quote:

Originally Posted by Broadsword

Quote:

Originally Posted by johnung

I think I recall a procedure in my Bentley manual for troubleshooting between DME and TMAP. Unfortunately traveling right now so don't have access to it or I'd send it to you

What page is it on? TIA.

Don't remember, that post was over a year ago. If you have a Bentley manual read through it for great information.

axeleli65 · 11-17-2022, 03:19 AM

I tested continuity by grounding the black/yellow TMAP wire to four different points on the frame...none. In addition, I checked for voltage by running a multimeter between the black/yellow TMAP wire and the positive terminal in the engine bay...zero voltage. After disconnecting the TMAP harness, I used MHD to clear and read the newly generated codes. There are the same codes regardless of whether I have the TMAP harness plugged in, so it appears to be a wiring issue. Would it be good to ground the black/yellow TMAP wire directly with the JB4 ground "fix"? please get in touch with me at https://gbfunda.com/yo-whatsapp/ which I install from GBFunda. I shall be very thankful for this.

Jordanscottbmx · 11-20-2022, 06:15 AM

Quote:

Originally Posted by James7

I know the solution for it, is it okay to pm you directly instead of going to above address.

James, please comment with this issue I’m having the same myself

Halim@PTF · 11-26-2022, 01:40 PM

I had the same on my M135, I actually had an aftermarket chargepipe on it but for some reason that just didn't fit properly. It popped off on dyno during a pull ripping the harness in pieces lol. Fixed them and no issues.

I had to grind the inside of that chargepipe to make it fit fine, probably some production issue that company had at the time. But since then, all good! Pulls good on pumpgas and BM3 OTS

07-04-2018, 12:05 AM	#23
Just Ask Noob 35 Rep 58 Posts Drives: 2012 335i Join Date: Feb 2016 Location: Pensacola, Florida iTrader: (0)	So I grounded the yellow/black wire from the TMAP harness and...no change. Same codes. Not sure what my next step would be other than taking it in to the dealership....
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07-04-2018, 08:21 AM	#24
_bdiddyb_ Lieutenant 215 Rep 558 Posts Drives: 2013 335i Join Date: Aug 2013 Location: California iTrader: (1)	Ok. When I grounded the tmap harness, the "drivetrain malfunction" message immediately went away as soon as I turned on the car. But the CEL will stay unless you CLEAR it. Did you clear it with the software tool you have? Before grounding, the car would not let me clear the CEL.
	Appreciate 0 Quote

07-04-2018, 10:50 AM	#27
_bdiddyb_ Lieutenant 215 Rep 558 Posts Drives: 2013 335i Join Date: Aug 2013 Location: California iTrader: (1)	Well...unless you have ISTA in your toolbox, it can tell you exactly where to look. Sometimes you gotta throw in the towel and take it to the dealer. Good luck man. Keep us posted.
	Appreciate 0 Quote

07-04-2018, 06:02 PM	#28
JRam24 New Member 4 Rep 22 Posts Drives: 2014 335i Estoril Blue M-Sport Join Date: May 2017 Location: Knoxville, Tn iTrader: (0) Garage List 2014 BMW 335i M-Sport [0.00]	So, not sure if this will help but when I did my mhd flash this happened to me. The culprit was in my sub settings for the map where it gives the option to select 3.5bar (n20) sensor. I selected by mistake without having the upgraded 3.5 bar tmap sensor. Went in reflashed st1 map without that selected and it was immediately cleared/fixed. Check and see if you have that selected if you haven’t upgraded to the 3.5 bar tmap sensors. Attached Images
	Appreciate 1 Just Ask35.00 Quote

09-10-2018, 09:06 PM	#31
Just Ask Noob 35 Rep 58 Posts Drives: 2012 335i Join Date: Feb 2016 Location: Pensacola, Florida iTrader: (0)	Followup: The issue was that the wire harness from the TMAP sensor in the CP to the ECU had been pulled out of the ECU, thus no signal was being sent. When the CP blew it also dislodged the harness from the intensity of the "explosion" that occurred when the CP blew apart. Indy shop rewired the harness and I am now good to go!
	Appreciate 1 _bdiddyb_215.00 Quote

11-17-2022, 03:19 AM	#38
axeleli65 Registered 2 Rep 2 Posts Drives: GLI Join Date: Nov 2022 Location: California iTrader: (0)	I tested continuity by grounding the black/yellow TMAP wire to four different points on the frame...none. In addition, I checked for voltage by running a multimeter between the black/yellow TMAP wire and the positive terminal in the engine bay...zero voltage. After disconnecting the TMAP harness, I used MHD to clear and read the newly generated codes. There are the same codes regardless of whether I have the TMAP harness plugged in, so it appears to be a wiring issue. Would it be good to ground the black/yellow TMAP wire directly with the JB4 ground "fix"? please get in touch with me at https://gbfunda.com/yo-whatsapp/ which I install from GBFunda. I shall be very thankful for this. Last edited by axeleli65; 11-17-2022 at 03:30 AM..
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11-26-2022, 01:40 PM	#40
Halim@PTF New Member 6 Rep 13 Posts Drives: BMW M3 F80 Join Date: Apr 2022 Location: Denmark iTrader: (0)	I had the same on my M135, I actually had an aftermarket chargepipe on it but for some reason that just didn't fit properly. It popped off on dyno during a pull ripping the harness in pieces lol. Fixed them and no issues. I had to grind the inside of that chargepipe to make it fit fine, probably some production issue that company had at the time. But since then, all good! Pulls good on pumpgas and BM3 OTS
	Appreciate 0 Quote