Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X5 (E53) Forum
Fluid Motor Union
User Name
Password
Member List Premier Membership Search Today's Posts Mark Forums Read

Xoutpost server transfer and maintenance is occurring....
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management


Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 10-14-2017, 10:36 AM
Member
 
Join Date: Mar 2017
Location: Sydney, Australia
Posts: 154
mcfee03 is on a distinguished road
New battery & Alternator causing Trans. Failsafe Prog

I recently replaced my alternator, and bought a new battery (today).

I am un-abled to clear the "Trans. Failsafe Prog" mode, which means it drives in limp mode. I have a feeling its' all related to electricity. It logs the P0102 fault via my ODB2 reader.

I'm very new, so may have missed something basic
  • My voltage at ignition position 1 & 2 is 11.9v.
  • At running (idle) it's 13.6v (shows that read for 5 seconds, the the Trans. Failsafe comes on).
  • I cleared the Fault ECU codes, but the Trans Failsafe immediately comes back. (sensor airflow pending fault). This is at position 2, idling, and while driving.

Maybe unrelated, but...
  • If I unplug the MAF sensor while the engine is running, the engine keeps running.
  • I just tried to plug a cigarette USB port into the socket- it sparked and stopped working (the USB). I tried another USB (very briefly) and it made a whining noise, so I unplugged it immediately...
  • I hear this clicking/ticking sound from the passengers side (in Australia, so LHD) which is the rear passenger window trying to go up (by itself!). Here is a video of how it sounds

What can I do to remove this Trans. Failsafe error?

Please help out with any suggestions.
__________________
02' X5 E53 3.0i Petrol (210k km/130k miles)
Will trade coding skills (Javascript, React, Node, Django, Mobile dev) for car knowledge
ODB II: ELM 327 (Torque Pro app)

Last edited by mcfee03; 10-30-2017 at 05:32 PM.
Reply With Quote

Sponsored Links

  #2  
Old 10-14-2017, 03:52 PM
Crowz's Avatar
Member
 
Join Date: Aug 2017
Location: Alabama
Posts: 2,483
Crowz will become famous soon enough
On the airflow issue it may be the Mass Airflow Meter. But you didn't list the code so I am having to guess. Need the number code not the text.


As for the cig lighter issue.
Take a volt meter and put one probe carefully on the center post of the cig lighter socket and then the put the 2nd probe on the outer shell of the cig lighter. See if the center probe is positive or negative. It sounds like the wiring is backwards on the lighter socket with one usb fried and the other making noise. The center post should be positive.
__________________
Just BMW's - All cars and trucks was two pages long
1994 318is
1997 528i
2000 323i
2001 X5 3.0 auto
2005 X5 3.0 auto
2011 535xi auto
2013 X5 xdrive35 Turbo
More are at my website

Aftermarket E53 Radio Install
Reply With Quote
  #3  
Old 10-14-2017, 05:46 PM
Member
 
Join Date: Jun 2015
Location: Southlake, Texas
Posts: 2,094
X53Jay4.8is is on a distinguished road
Quote:
Originally Posted by mcfee03 View Post
I recently replaced my alternator, and bought a new battery (today).

I am un-abled to clear the "Trans. Failsafe Prog" mode, which means it drives in limp mode. I have a feeling its' all related to electricity.

I'm very new, so may have missed something basic
  • My voltage at ignition position 1 & 2 is 11.9v.
  • At running (idle) it's 13.6v (shows that read for 5 seconds, the the Trans. Failsafe comes on).
  • I cleared the Fault ECU codes, but the Trans Failsafe immediately comes back. (sensor airflow pending fault). This is at position 2, idling, and while driving.

Maybe unrelated, but...
  • I just tried to plug a cigarette USB port into the socket- it sparked and stopped working (the USB). I tried another USB (very briefly) and it made a whining noise, so I unplugged it immediately...
  • I hear this clicking/ticking sound from the passengers side (in Australia, so LHD). Here is a video of how it sounds

What can I do to remove this Trans. Failsafe error?

Please help out with any suggestions.
Yeah something is mixed up in your wiring because of what you encountered at the cigarette lighters in the vehicle. Are there any ground wires off in the back of the vehicle where the battery was replaced? I would check back there first making sure that all wires look like they are in place. Finally is the clicking noise a relay or electrical module? Can you pinpoint where the sound is coming from?
Reply With Quote
  #4  
Old 10-14-2017, 06:02 PM
Member
 
Join Date: Mar 2017
Location: Sydney, Australia
Posts: 154
mcfee03 is on a distinguished road
Quote:
Originally Posted by Crowz View Post
On the airflow issue it may be the Mass Airflow Meter. But you didn't list the code so I am having to guess. Need the number code not the text.


As for the cig lighter issue.
Take a volt meter and put one probe carefully on the center post of the cig lighter socket
I do not have a volt meter. I can order one, but would be a couple weeks until it arrives.

P0102 is the code I get (sometimes Pending fault, sometimes actual fault).
__________________
02' X5 E53 3.0i Petrol (210k km/130k miles)
Will trade coding skills (Javascript, React, Node, Django, Mobile dev) for car knowledge
ODB II: ELM 327 (Torque Pro app)
Reply With Quote
  #5  
Old 10-14-2017, 06:07 PM
Member
 
Join Date: Mar 2017
Location: Sydney, Australia
Posts: 154
mcfee03 is on a distinguished road
Quote:
Originally Posted by X53Jay4.8is View Post
Are there any ground wires off in the back of the vehicle where the battery was replaced?
What do you mean by wires off in the back? There is just the standard Positive & negative cables on the battery.

Quote:
Originally Posted by X53Jay4.8is View Post
Finally is the clicking noise a relay or electrical module? Can you pinpoint where the sound is coming from?
Just found out- its the rear passenger electric window!

The rear passenger window goes up a bit by itself! The clicking noise could be the sound of the window trying to go up further when its closed. It goes up when the key is outside of the ignition.

EDIT:

JUST unplugged the MAF while the engine was running. The engine did NOT stop. Could the MAF be the sole cause of this fail safe?
__________________
02' X5 E53 3.0i Petrol (210k km/130k miles)
Will trade coding skills (Javascript, React, Node, Django, Mobile dev) for car knowledge
ODB II: ELM 327 (Torque Pro app)

Last edited by mcfee03; 10-14-2017 at 08:03 PM.
Reply With Quote
  #6  
Old 10-14-2017, 11:31 PM
bcredliner's Avatar
Premier Member
 
Join Date: Jun 2008
Location: Little Elm,Texas. (40 minutes North of Dallas)
Posts: 8,105
bcredliner is on a distinguished road
You should not have started another thread. All that has been discussed is not available in this one. You are doing everything everyone suggests and some of things you come up with. You are jumping around a given issue and from one issue to another making it extremely difficult to help.

It has been suggested several times to stick to one issue which should be making sure the battery and alternator are working properly.

If you are going to DIY the first thing to learn is to follow an established troubleshooting process, take a step by step systematic approach to find the core issue before buying parts. Second, do your own research and then ask questions here or verify what you are told here with your own research afterword. Most threads like this would have been resolved long ago.

I don't recall you saying the vehicle starts every time now? Was the battery you bought fully charged when you bought it. Have you started it up and let it idle for 20-30 minutes and monitored voltage? Have you checked for parasitic drain? Did it start and charge OK before the DISA, intake--whatever it was work? How long have you owned your X5?
__________________
X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas
Reply With Quote
  #7  
Old 10-14-2017, 11:49 PM
andrewwynn's Avatar
Member
 
Join Date: Jun 2015
Location: Racine, WI
Posts: 10,818
andrewwynn will become famous soon enough
+1 on reliable start. Yes/no

I'm ok with the new thread it actually goes along with the pick a problem and fix it however there are puzzle pieces missing.

Engine doesn't require maf to run as you noticed. A few diagnostic tests pull the plug while running.

If your voltage won't stay constant it will definitely trip the trans safe mode. There is a procedure to reset it as this happened to me when I forgot to tighten my alternator power cable after refurbishing. Check the nut on that cable.

Stick to one problem at a time. Pull fuses on the gremlins like the power socket and the rear window until the important items are resolved


Sent from my iPhone using Tapatalk Pro
__________________
2011 E70 • N55 (me)
2012 E70 • N63 (wife)
Reply With Quote
  #8  
Old 10-15-2017, 12:36 AM
bcredliner's Avatar
Premier Member
 
Join Date: Jun 2008
Location: Little Elm,Texas. (40 minutes North of Dallas)
Posts: 8,105
bcredliner is on a distinguished road
Would like to have answers to the questions and do a parasitic drain test before pulling any fuses.
__________________
X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas
Reply With Quote
  #9  
Old 10-15-2017, 03:13 AM
Member
 
Join Date: Mar 2017
Location: Sydney, Australia
Posts: 154
mcfee03 is on a distinguished road
I think there was confusion on that other thread.

Starting is perfect - a new battery has fixed that.

Quote:
Originally Posted by bcredliner View Post
Would like to have answers to the questions .
Was the battery you bought fully charged when you bought it.
Yes

Have you started it up and let it idle for 20-30 minutes and monitored voltage?
No, I can't do this as the fail-safe message comes up and hides the voltage


Have you checked for parasitic drain?
No

Did it start and charge OK before the DISA, intake--whatever it was work?
Yep worked fine.

How long have you owned your X5?
6 months, only driven for 2 of them!
__________________
02' X5 E53 3.0i Petrol (210k km/130k miles)
Will trade coding skills (Javascript, React, Node, Django, Mobile dev) for car knowledge
ODB II: ELM 327 (Torque Pro app)

Last edited by mcfee03; 10-15-2017 at 05:25 AM.
Reply With Quote
  #10  
Old 10-15-2017, 09:53 AM
andrewwynn's Avatar
Member
 
Join Date: Jun 2015
Location: Racine, WI
Posts: 10,818
andrewwynn will become famous soon enough
New battery & Alternator causing Trans. Failsafe Prog

I'm concerned it's only starting well from the initial charge. Until you can monitor voltage white running for an extended periods you can't tell. You can buy a plug in tester that goes in the cig lighter socket. That could also answer the problem with usb charger.

You need a DMM to work on a car. Get a non-shitty one. Gently used fluke from eBay is a good way to go. I've seen decent new Klein models under $50 don't buy a no-name model.

Here's a big duh: did you say you have the wifi obd dongle? Use dash command app to monitor voltage.

If the voltage is not reliable the abs will likely disable as well as the trans. Car can still drive with trans in limp home mode just only uses 4th gear so be gentle off the line it will feel like you have some mates outside pushing vs engine. It's called fail *safe*. I drove mine at least 10 miles through 2/3 red lights before I found a place to pull in and Google how to reset the transmission.

Having dash command is a life saver I have twice had a sporotic misfired cylinder that tripped an engine limp home mode and it feels like 3/6 cylinders are shut off when that happens. I was able to clear the code and life was back to normal without even stopping the car! That was wild having the engine instantly start working properly while I was still driving!

I suspect I might have a weak spark coil as it was the same cylinder but it's only happened twice in 25,000 miles so I have not been able to track down that exact source.

Back to your issue: you need to confirm the charging system is working properly before you destroy the new battery. Also confirm no parasitic drain which will require a DMM.
__________________
2011 E70 • N55 (me)
2012 E70 • N63 (wife)

Last edited by andrewwynn; 10-15-2017 at 10:11 AM.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On





All times are GMT -4. The time now is 08:46 AM.
vBulletin, Copyright 2024, Jelsoft Enterprises Ltd. Search Engine Friendly URLs by vBSEO 3.6.0
© 2017 Xoutpost.com. All rights reserved. Xoutpost.com is a private enthusiast site not associated with BMW AG.
The BMW name, marks, M stripe logo, and Roundel logo as well as X3, X5 and X6 designations used in the pages of this Web Site are the property of BMW AG.
This web site is not sponsored or affiliated in any way with BMW AG or any of its subsidiaries.