Member Since: 12 Aug 2020
Location: Bristol
Posts: 57
Identify this tube! and Xmas tree faults :(
Hi All,
Is this tube the sunroof drain tube? I'm a bit confused as I thought it routed out through the wing? I'm trying to track down a CAN BUS issue so had to remove the battery and fuse box and found this tucked under it!
Click image to enlarge
Also my lady is a bit sick and getting the Christmas tree lights "special programs off", "HDC off", "Park Brake Fault", "Transmission fault" etc.
These are the codes:
1. PCM - Powertrain control module —— ( 2 )
1.1. P140D-00 Exhaust gas recirculation control circuit B range/performance.
Permanent
1.2. U0101-00 Lost communication with transmission control module
Intermittent
2. TCM - Transmission control module —— ( 6 )
2.1. U0155-87 Lost communication with instrument cluster control module.
Permanent
2.2. U0100-87 Lost communication with engine control module/powertrain control module 'A'
Intermittent
2.3. U0122-87 Lost communication with vehicle dynamics control module.
Temporary
2.4. U0102-87 Lost communication with transfer case control module
Intermittent
2.5. U0126-87 Lost communication with steering angle sensor module
Intermittent
2.6. U0128-87 Lost communication with parking brake control module
Intermittent
3. IPC - Instrument cluster control module —— ( 2 )
3.1 U0001-88 High speed CAN communication bus
Temporary
3.2. U0101-87 Lost communication with transmission control module
Temporary
4. PBM - Parking brake control module —— ( 2 )
4.1. U0101-87 Lost communication with transmission control module
Permanent
4.2. U0155-87 Lost communication with instrument cluster control module.
Permanent
5.ATCM - All terrain control module —— ( 4 )
5.1. U0101-87 Lost communication with transmission control module
Intermittent
5.2. U0402-94 Invalid data received from transmission control module
Temporary
5.3. U0416-94 Invalid data received from vehicle dynamics control module.
Temporary
5.4. U0421-94 Invalid data received from ride level control module.
Temporary
6. FLM - Front lighting control module —— ( 1 )
6.1. U0001-87 High speed CAN communication bus
Intermittent
7. RLM - Ride level control module —— ( 2 )
7.1. U0416-86 Invalid data received from vehicle dynamics control module.
Temporary
7.2. U0126-87 Lost communication with steering angle sensor module
Intermittent
8. SASM - Steering angle sensor module —— ( 1 )
8.1. U0073-88 Control module communication bus off.
Intermittent
9. TCCM - Transfer case control module —— ( 5 )
9.1. U0073-88 Control module communication bus off.
Intermittent
9.2. U0100-87 Lost communication with engine control module/powertrain control module 'A'
Intermittent
9.3. U0155-87 Lost communication with instrument cluster control module.
Intermittent
9.4. U0126-87 Lost communication with steering angle sensor module
Intermittent
9.5. U0101-87 Lost communication with transmission control module
Intermittent
I can see that it's probably a cascade failure due to the CANBUS going down. so far I have:
Replaced Brake Light switch
Replaced rear bulbs
Had the Instrument cluster checked (No Faults)
Checked fuses
Check TCCM behind battery for corrosion/water ingress
Replaced the Battery
Checked the Alternator voltage
Checked continuity of CANBUS and voltages both okay.
I'm now onto looking for corrosion in the splices, looking at the wiring diagram and error codes I think it's most likely an issue somewhere near connector C2365 and splice SJ2720. As these head towards the TCM and most of the error codes seem to relate to that.
Click image to enlarge
Anyone know which way the wire routes and where this splice is? I found the connector but not the splice.
Thanks in advance!
24th Sep 2020 4:13 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72809
Should help definition, though not with focus.
Click image to enlarge
Click image to enlarge
Click image to enlarge
24th Sep 2020 4:17 pm
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10382
i would imagine the tube is the battery vent.
Which should push into the front end of the battery
24th Sep 2020 6:47 pm
Nutterwatts
Member Since: 12 Aug 2020
Location: Bristol
Posts: 57
Thanks Pete, just checked it out and the pipe is a battery vent
No to try and resolve the other issues!
24th Sep 2020 8:43 pm
Martin Site Admin and Owner
Member Since: 06 Nov 2004
Location: Hook Norton
Posts: 18464
From my set of wiring diagrams, SJ2720 lies 610mm back from C0193 for the TCM, SJ2721 for the HS CAN L line is 660mm back from C0193.
I think your instinct to check the TCM wiring is a good one, as lost comms with the TCM appears in the fault list for most of the other modules, and the TCM itself holds the most lost comms faults too.
However, the HS CAN bus wires are pretty vulnerable to damage at the rear end chassis connectors from where it goes to the EPB module and back. It is not unknown for the loom to chafe here intermittently which would give you a short to ground and the "BUS OFF" errors which some of the modules have logged (FLM, SASM, TCCM). My D3 had its EPB switch wires chafe here and gave loads of hassle until I bypassed the connectors.
And an old post of mine relating to the switch wiring (you are looking for different colours/pin locations - middle wires on bottom row of the photo in this post)
See if the loom from the black connector pair is touching the chassis or damaged where the wires enter the connector. If so inspect the harness and move it away gently and check if that makes things better.06 D3 SE / 15 LR D90 XS SW / 88 LR 90 Td5 / 68 BMW 2000 ti
Any issues with the site let me know!
24th Sep 2020 10:25 pm
Nutterwatts
Member Since: 12 Aug 2020
Location: Bristol
Posts: 57
Hi Martin,
Thanks for the help it’s appreciated
Do you know the route of the wires from the TCM from the connector they go up above the transmission and I can’t tell if that’s into the centre console or towards the engine bay
Also I undid the connector on the back of the TCM and found a smudge of oil on the connections, is this normal?
I did check the EPB wires previously but that’s a great heads up and I will check them again.
24th Sep 2020 11:26 pm
Martin Site Admin and Owner
Member Since: 06 Nov 2004
Location: Hook Norton
Posts: 18464
Towards the engine bay. You can see from the diagram where you've circled the splice in the CAN H line that it's a branch off down to the TCM, however it's a branch off a loop.
The loop is out/in from the C2365/C2366 pair, pins 4+2 (HIGH), 5+3 (LOW).
Pins 4 and 5 are the pair to the PCM, 2 and 3 are the pair to the TCCM.
The C2365/C2366 pair is the 18 way black slide-lock pair behind the battery/in front of the TCCM.
Member Since: 12 Aug 2020
Location: Bristol
Posts: 57
So spent some time going through all the wiring and have discovered it's a faulty connection on the Mechatronic connector plug. I can actually get it to throw a hissy fit by wiggling the wires So at least I have now pinpointed the issue.
I started another thread on the Mechatronic connector, it looks like the best option will be to splice in a new one.
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So at least I have now pinpointed the issue.
