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Author Topic: Transmission Failsafe  (Read 837 times)

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April 18, 2018, 11:11:43 AM

lezmtaylor

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Transmission Failsafe
« on: April 18, 2018, 11:11:43 AM »
Have had this problem for a while now ,when starting the car and in Park , frequently the trans f/safe warning comes up .
The car battery is 2 years old and is fully charged (Ctec charging when parked). The initial way to make the wng light go out is : switch off ign , remove key, wait for warning to go out and try again. Some times the wng stay out, other times it take numerous times before it stays out.
Is there a wng sensor that is playing up ?
I have just tried slipping the gear shift into neutral before starting  and so far the T W L has not come on.
The warning does not come on when driving the car.

May seem a bit garbled, but have given as much info as possible.

Lez
2002. 4.4lpg,ledAE's,Xenons,paddleshift,compass mirror,inst rings,led int lights,rear camera,crystal tailights,eisenmann road exh,Schnitzer pedals,chrome indicators,colour co-ord headlamps & bonnet grilles,hualigim entertainment system.dash and rearcamera,comfort seats.hud,bull bars,engine instalube

April 18, 2018, 11:48:13 AM
Reply #1

henrym3

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Re: Transmission Failsafe
« Reply #1 on: April 18, 2018, 11:48:13 AM »
Difficult Lez, so many things can cause this really need a scan to hopefully point you in the right direction. Are you starting the car with the ctec still connected or are you disconnecting first. As it isn’t happening when driving i would still lean toward battery problem but really need a scan


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E53 X5 4.6is, Carbon Black, LPG, Paddle Shift, Dynavin N6, Lowered, 22"Wheels, Side Bars. Perfusion Exhaust
E30 M3 Black, S50B32 Engine, 6 Speed Box, Ireland Engineering ARBs & Big Brake Conversion, Lowered, 18"LMs, CF CAI, CF Splitter & Barge Board, ZM3 Quad Exhaust.
VW R32 Gone

April 18, 2018, 07:10:32 PM
Reply #2

lezmtaylor

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Re: Transmission Failsafe
« Reply #2 on: April 18, 2018, 07:10:32 PM »
Hi Henry,
No always removing ctek before starting the car.
Any suggestions for best code reader ?

Lez,
2002. 4.4lpg,ledAE's,Xenons,paddleshift,compass mirror,inst rings,led int lights,rear camera,crystal tailights,eisenmann road exh,Schnitzer pedals,chrome indicators,colour co-ord headlamps & bonnet grilles,hualigim entertainment system.dash and rearcamera,comfort seats.hud,bull bars,engine instalube

April 19, 2018, 04:16:47 PM
Reply #3

V8 00USH

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Re: Transmission Failsafe
« Reply #3 on: April 19, 2018, 04:16:47 PM »
You can't usually scan the gearbox ECU for codes with cheap scanners as they only scan do the engine ECU. Best off trying to find someone with BMW software or a decent commercial scanner like a Snap On etc.

I've had this on mine a couple of times too on startup but nothing has shown when I've scanned it.

April 23, 2018, 09:26:29 PM
Reply #4

henrym3

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Re: Transmission Failsafe
« Reply #4 on: April 23, 2018, 09:26:29 PM »
I have one of Foxwell's expensive scanners (hand held) £300+ and it scans the gearbox, been very impressed and not just because I spent that sort of money but in all honesty over the last 4 years had I went and payed for a scan I would probably have spent way more than that plus you have the convenience of the slightest problem then bung the scanner on.
E53 X5 4.6is, Carbon Black, LPG, Paddle Shift, Dynavin N6, Lowered, 22"Wheels, Side Bars. Perfusion Exhaust
E30 M3 Black, S50B32 Engine, 6 Speed Box, Ireland Engineering ARBs & Big Brake Conversion, Lowered, 18"LMs, CF CAI, CF Splitter & Barge Board, ZM3 Quad Exhaust.
VW R32 Gone

April 24, 2018, 09:42:29 AM
Reply #5

marti

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Re: Transmission Failsafe
« Reply #5 on: April 24, 2018, 09:42:29 AM »
Even though you say your battery is only 2 yrs old it can still be a low voltage problem cells do sulphate and die, check the voltage when not started should be around 12.2V or there abouts and when running 13.8V to 14.2V.

June 21, 2018, 09:47:37 AM
Reply #6

lezmtaylor

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Re: Transmission Failsafe
« Reply #6 on: June 21, 2018, 09:47:37 AM »
Well, I thought I would try and explain what I have done to cure!! the problem.
On the advise of Henry3 I bought a good code reader ( Autel Maxidiag Elite MD802) , but it did not throw up any fault codes for the Trans Failsafe).
Sod it , so I have now adopted the following start procedure which works every time.

To start : key in ignition, turn to 1st position, select Neutral with trans selection lever (gear stick) and then start car, works every time, NO Trans failsafe on panel.

I know I may be missing something, but this system works everytime, Road speed is fine( had legal limit +60)
so any ideas out there.
Battery is fine, 2years old.
Have just done 2 x 320m trips in last week, no probs.

Lez
2002. 4.4lpg,ledAE's,Xenons,paddleshift,compass mirror,inst rings,led int lights,rear camera,crystal tailights,eisenmann road exh,Schnitzer pedals,chrome indicators,colour co-ord headlamps & bonnet grilles,hualigim entertainment system.dash and rearcamera,comfort seats.hud,bull bars,engine instalube

June 21, 2018, 08:29:29 PM
Reply #7

Sky Bear

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Re: Transmission Failsafe
« Reply #7 on: June 21, 2018, 08:29:29 PM »
Maybe look at popping it into someone who specialises in gearboxes for their take on it.

Gloucester Road gearboxes in Bristol could do you a full dialysis fluid change at the same time which is always a good move with an auto box.

Or if starting in neutral works for you call it character and ignore.

SB
5.0L E53 owner who has a child like grin when driving. Hobbies include visiting lots of petrol stations. :drive:

June 22, 2018, 02:28:45 PM
Reply #8

henrym3

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Re: Transmission Failsafe
« Reply #8 on: June 22, 2018, 02:28:45 PM »
Feel well guilty now Lez, spending all that money and not getting a fault. Hopefully it will pay for it’s self in the years to come. Not that I’m hoping you’ll get lots of faults. I’ll stop now before I dig the hole any deeper
E53 X5 4.6is, Carbon Black, LPG, Paddle Shift, Dynavin N6, Lowered, 22"Wheels, Side Bars. Perfusion Exhaust
E30 M3 Black, S50B32 Engine, 6 Speed Box, Ireland Engineering ARBs & Big Brake Conversion, Lowered, 18"LMs, CF CAI, CF Splitter & Barge Board, ZM3 Quad Exhaust.
VW R32 Gone

June 22, 2018, 07:03:50 PM
Reply #9

lezmtaylor

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Re: Transmission Failsafe
« Reply #9 on: June 22, 2018, 07:03:50 PM »
No Problems Henry, got another tool to play with and as it does all makes of car Suddenly I am very popular with the younger family members,  can't think why!!

Lez
2002. 4.4lpg,ledAE's,Xenons,paddleshift,compass mirror,inst rings,led int lights,rear camera,crystal tailights,eisenmann road exh,Schnitzer pedals,chrome indicators,colour co-ord headlamps & bonnet grilles,hualigim entertainment system.dash and rearcamera,comfort seats.hud,bull bars,engine instalube

July 13, 2018, 01:55:07 PM
Reply #10

V8 00USH

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Re: Transmission Failsafe
« Reply #10 on: July 13, 2018, 01:55:07 PM »
That will be your transmission position switch at fault then.  Around £250 brand new from BMW. I've recently replaced mine with a used one off an L322 4.4i M62 Range Rover (£65) as it was doing the same thing and eventually came up with the corresponding code stored on the transmission ECU.

July 16, 2018, 09:39:34 AM
Reply #11

lezmtaylor

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Re: Transmission Failsafe
« Reply #11 on: July 16, 2018, 09:39:34 AM »
Thanks for that, at least i now know what the problem is , but why no info on the codes?
Where is the switch positioned and is it difficult to replace?

Lez
2002. 4.4lpg,ledAE's,Xenons,paddleshift,compass mirror,inst rings,led int lights,rear camera,crystal tailights,eisenmann road exh,Schnitzer pedals,chrome indicators,colour co-ord headlamps & bonnet grilles,hualigim entertainment system.dash and rearcamera,comfort seats.hud,bull bars,engine instalube

July 16, 2018, 09:09:56 PM
Reply #12

henrym3

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E53 X5 4.6is, Carbon Black, LPG, Paddle Shift, Dynavin N6, Lowered, 22"Wheels, Side Bars. Perfusion Exhaust
E30 M3 Black, S50B32 Engine, 6 Speed Box, Ireland Engineering ARBs & Big Brake Conversion, Lowered, 18"LMs, CF CAI, CF Splitter & Barge Board, ZM3 Quad Exhaust.
VW R32 Gone

July 18, 2018, 10:04:38 AM
Reply #13

lezmtaylor

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Re: Transmission Failsafe
« Reply #13 on: July 18, 2018, 10:04:38 AM »
Many thanks Henry, at least I have the info now printed off and in the ''to do'' File.

Lez
2002. 4.4lpg,ledAE's,Xenons,paddleshift,compass mirror,inst rings,led int lights,rear camera,crystal tailights,eisenmann road exh,Schnitzer pedals,chrome indicators,colour co-ord headlamps & bonnet grilles,hualigim entertainment system.dash and rearcamera,comfort seats.hud,bull bars,engine instalube