Member Since: 08 Mar 2012
Location: Johannesburg
Posts: 14
D3 Transmission Fault, But NO other faults.
Good Morning all.
Strange fault appeared this morning. with ignition on, just before starting her. I get 1 bing and a transmission fault.
NO other Faults are reported, no HDC, traction reduced etc. and there are no codes either (cheap blue tooth reader currently) so if I dont get anywhere Ill have to book it in sometime.
The battery is brand new and alternator is charging when running.
Prior to this I did have I did have a number of other faults at the displayed at the same time and also had the P0504 brake switch A/ correlation deal.
I replaced the brake switch with a new one from dealers and all was fine ( although ) I haven't driven the car much since.
This weekend when starting the car I had this one and only fault.
Driving the car doesnt show any signs of issues with transmission drive train etc. Gear change is smooth and as it always has been
One thing that might give you clever guys a clue, is if I apply a slight amount of pressure to the gear lever while in park, it sometimes does not display the transmission fault. ??
also something to mention is that a few times now, while pushing and releasing the brake pedal and hold the gear selector you can feel a solenoid / actuator or something clicking
I assume there's an actuator to prevent you being able to move the gear lever or something like that when you shouldn't.
As always, any ideas would be greatly appreciated.
Last edited by splitpin1234 on 15th Jun 2020 4:45 pm. Edited 1 time in total
15th Jun 2020 10:37 am
Globetrotter448
Member Since: 21 Mar 2017
Location: Londonderry NSW
Posts: 1780
Check the gear lever pivot on side of gearbox as this can seize
15th Jun 2020 10:59 am
Bungle
Member Since: 07 Apr 2015
Location: Wanborough
Posts: 254
In the back of my mind there is something about if the stop/tail bulb element fails and shorts the stop tail circuits together (which it can do if the elements are horizontal rather than vertical) it can give odd transmission fault messages...
15th Jun 2020 11:45 am
Harry365
Member Since: 25 Aug 2018
Location: Lincoln
Posts: 373
So you've replaced the brake pedal switch and all is fine? I'd say until all is not fine again, you've fixed the issue.
15th Jun 2020 1:07 pm
splitpin1234
Member Since: 08 Mar 2012
Location: Johannesburg
Posts: 14
Hello Harry,
thanks,
I re read my post and see where I made the error.
Before the brake switch replacement, I had HDC Fault, transmission fault, suspension lowering etc.
the fault code was preset and indicated the brake switch, which has been replaced, The car was fine then.
This weekend, when starting before it turns over. I already get the transmission fault displayed etc.
Car dives fine gear changes normal, no other faults noted.
I will correct my first post.
15th Jun 2020 4:41 pm
Harry365
Member Since: 25 Aug 2018
Location: Lincoln
Posts: 373
No worries mate.
Whilst unlikely, do not completely rule out the new switch also being faulty.
As someone said earlier, check the gearbox and make sure the lever moves freely. I think it throws a fault if the selector and lever are out of sync. Bang a load of wd40 on it, remove the cable and move it by hand (with the engine off!) Be ready with a spare bolt or make your own (bolt with a hole through a flattened head). Also might be worth just unplugging the gear selector electrical connectors and make sure they are all clean. A lot of drinks spill here, at least in my car. Dash removal.guides everywhere but do this last as the cupholders usually break.
15th Jun 2020 5:08 pm
splitpin1234
Member Since: 08 Mar 2012
Location: Johannesburg
Posts: 14
D3 Transmission Fault, But NO other faults.
Good Morning ALL.
So my saga seems to continue.
I got a new brake switch installed it and the fault remains the same.
What I have noticed,
if I push and hold the brake while starting the car. I do NOT get any faults. drive her around as per normal, when stopping, if I hold the brake while i put her into park and shut her down while holding the brake, then NO fault.
If I stop and put into park and release the brake, the transmission faults pops up and then goes away within a second, it sometimes returns and disappears ( cycles on and off for about 30 seconds ) and then goes away.
No faults codes are recorded however.
SO, there is some solenoid in the transmission, that is looking for brake pedal application, im assuming to release and allow gear change out of park ?
Does anyone perhaps detailed wiring that you are willing to share with me on the brake and transmission systems please ? Looking for links so I can work on getting this sorted.
Thanks in advance
8th Oct 2020 10:51 am
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13597
Hi
Hope this helps u, is the full wiring manual , transmission page 38
Always the way with these annoying faults in trying to pin them down
Know what u mean ,there is that gear lever interlock that u can hear clicking when u press the brake pedal , wonder if that is causing an issue , wonder if there’s a issue with the wiring/ connector between the ecu module and gear-lever interlock
Hope u get it easily resolved
8th Oct 2020 11:12 am
splitpin1234
Member Since: 08 Mar 2012
Location: Johannesburg
Posts: 14
D3 Transmission Fault, But NO other faults.
Cheers Gstuart
Thank you for the quick reply mate.
much appreciated.
Ill see what I find and report back asap.
8th Oct 2020 11:30 am
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13597
Ur so welcome
Also found this for u , knew I had it somewhere , lol , enclosed the connector pic as well
Hope it may help and indeed Plse let us know how things go
Click image to enlarge
8th Oct 2020 11:46 am
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13597
Member Since: 21 Oct 2016
Location: kent
Posts: 13597
Plus wondered if this may be useful, ref canbus testing and to see if there’s any errors that may flag up
Hope it may help u in a small way find the error
With both battery leads disconnected from the battery posts
Multimeter set to ohms , ( TP Is just short for test probe from ur multimeter )
TP to pin 6 other TP to pin 14 , read ohms
TP to pin 3 other TP to pin 11 , read ohms
Reconnect battery , ign off , meter set to Vdc
TP to pin 6 other TP pin 4 Read Vdc
TP to pin 6 other TP to pin 5 Read Vdc
TP to pin 14 other TP to pin 4 Read Vdc
TP to pin 14 other TP to pin 5 Read Vdc
TP to pin 6 other TP to pin 14 read Vdc
Pin 16 will be your battery Positive
OBD2 PIN identifications
Pin 1
Pin 2 - PWM positive
Pin 3 - medium canbus ( high side )
Pin 4 - chassis ground
Pin 5 - signal ground
Pin 6 - high canbus ( high side )
Pin 7 - K line
Pin 8 - transmission module
Pin 9 - ABS module
Pin 10 - PWM Negative
Pin 11 - medium canbus ( low side )
Pin 12 - restraint control module
Pin 13
Pin 14 - high canbus ( low side )
Pin 15
Pin 16 battery voltage


8th Oct 2020 12:00 pm
Harry365
Member Since: 25 Aug 2018
Location: Lincoln
Posts: 373
Have you done as I said above and removed the center console and cleaned the connectors. That's where your the magic happens to stop the stick moving without foot on brake. Checked the new brake switch is not faulty itself. Low battery will cause transmission fault, even if it's briefly during startup. 11.6v is as low as they ECUs can go before they start to cry. Check height sensor voltage. They can fail and still work exactly as expected and not throw up codes but the voltage reading will be all over the place. Needs to be monitored while driving looking for spikes in voltage. Gotta start with the simple stuff when eliminating causes.
8th Oct 2020 12:21 pm
splitpin1234
Member Since: 08 Mar 2012
Location: Johannesburg
Posts: 14
Good Afternoon All.
So first thank you again for the information you have all provided, very helpful.
I changed the brake switch again, and the bulbs . still with no change.
next I took the center console apart and cleaned every switch these is,
I can say there was indeed some corrosion on the gear select connector, on pin 9. cleaned and protected the connector and unfortunately the fault remained.
Today, I drove a fair bit to a recommended Indy in Pretoria north who after some looking around recommended clearing all the fault codes etc for everything and start again from the beginning.
We did this and the fault was present at first start, but the codes really didn't point to much.
second resort was to re-calibrate the transmission ( not sure what ) and the rear diff actuator.
He also did a software update for the rear diff.
Cleared faults for the 3rd time, and guess what. NO Faults came back.
I drove the car back home, about 100 KM with a few stops and the fault has not returned at all.
Interestingly, there wasn't any diff lock faults reported before,
So early days, but things are certainly looking up.
15th Oct 2020 3:03 pm
splitpin1234
Member Since: 08 Mar 2012
Location: Johannesburg
Posts: 14
Hello.
Well that unfortunately was short lived happiness.
The fault has returned, so guess we starting again somewhere and back to the workshop.
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
