Do a full scan and post codes (At least ECU, TCU, and ABS.
18034 Electrical TCU problem?
So I've been trying to diagnose the source of this to no avail...
This is the error message from the vagcom for the ABS module:
18034 - Powertrain Data Bus: Missing Message from TCU
P1626 - 35-10 - - - Intermittent
I took the passenger side footwell apart and looked at the TCU and it seemed fine. Some of the wires were exposed but it didn't seem in bad shape. I do have it GIAC chipped with the tipchip but that has been for 10+ years now without an issue. I opened the TCU and the chip seems fine, everything seemed OK.
So, while driving, the problem has been getting worse but basically in auto mode, the car will have a real violent jerking especially when it's in 5th gear. I put it into tip mode and manually played with the gears and noticed that especially when its in 5th gear, the car will do the violent jerking to kick down to 4th. when in 4th its fine. I do notice that the PRND32 lights will get replaced for a split second before it does the transmission slip. Which I think explains that the car loses the electrical connection to the TCU and so the transmission goes beserk especially when its in the overdrive 5th gear.
Anyone have this problem before? It's such a difficult problem to diagnose. I can't exactly see what strand of wire is slightly off connection or if the TCU itself has a corroded connection or something that is causing this. Short of bringing it to a shop and letting them have a field day replacing everything, is there anything else I can look into to replace or bolster?
2001.5 B5.5 1.8T Tip
TIA.
This is the error message from the vagcom for the ABS module:
18034 - Powertrain Data Bus: Missing Message from TCU
P1626 - 35-10 - - - Intermittent
I took the passenger side footwell apart and looked at the TCU and it seemed fine. Some of the wires were exposed but it didn't seem in bad shape. I do have it GIAC chipped with the tipchip but that has been for 10+ years now without an issue. I opened the TCU and the chip seems fine, everything seemed OK.
So, while driving, the problem has been getting worse but basically in auto mode, the car will have a real violent jerking especially when it's in 5th gear. I put it into tip mode and manually played with the gears and noticed that especially when its in 5th gear, the car will do the violent jerking to kick down to 4th. when in 4th its fine. I do notice that the PRND32 lights will get replaced for a split second before it does the transmission slip. Which I think explains that the car loses the electrical connection to the TCU and so the transmission goes beserk especially when its in the overdrive 5th gear.
Anyone have this problem before? It's such a difficult problem to diagnose. I can't exactly see what strand of wire is slightly off connection or if the TCU itself has a corroded connection or something that is causing this. Short of bringing it to a shop and letting them have a field day replacing everything, is there anything else I can look into to replace or bolster?
2001.5 B5.5 1.8T Tip
TIA.
1 - 11 of 11 Posts
OK, the full scan is as below:
But just a FYI, I haven't cleared codes for 6 months and a lot of it was from way back. But this time, I cleared the codes after this scan just so I can see what comes back. Something I didn't mention is that the ASR light will come on and off periodically.
VCDS-Lite Version: Release 1.2
Sunday, 10 November 2013, 13:34:47.
Control Module Part Number: 4B0 906 018 CH
Component and/or Version: 1.8L R4/5VT G 0001
Software Coding: 16551
Work Shop Code: WSC 00028
VCID: 69A53EA70061
7 Faults Found:
17536 - Fuel Trim; Bank 1 (Mult): System too Lean
P1128 - 35-00 - -
18010 - Shareware Version. To Decode all DTCs
P1602 - 35-10 - Please Register/Activate - Intermittent
18034 - Shareware Version. To Decode all DTCs
P1626 - 35-10 - Please Register/Activate - Intermittent
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 35-10 - - - Intermittent
16685 - Shareware Version. To Decode all DTCs
P0301 - 35-10 - Please Register/Activate - Intermittent
16688 - Shareware Version. To Decode all DTCs
P0304 - 35-10 - Please Register/Activate - Intermittent
16687 - Cylinder 3: Misfire Detected
P0303 - 35-10 - - - Intermittent
VCDS-Lite Version: Release 1.2
Sunday, 10 November 2013, 13:35:12.
Control Module Part Number: 3B0 614 111
Component and/or Version: ABS/ASR 5.3 FRONT D00
Software Coding: 00021
Work Shop Code: WSC 00028
VCID: D3D97C4F32ED
1 Fault Found:
18034 - Powertrain Data Bus: Missing Message from TCU
P1626 - 35-10 - - - Intermittent
But just a FYI, I haven't cleared codes for 6 months and a lot of it was from way back. But this time, I cleared the codes after this scan just so I can see what comes back. Something I didn't mention is that the ASR light will come on and off periodically.
VCDS-Lite Version: Release 1.2
Sunday, 10 November 2013, 13:34:47.
Control Module Part Number: 4B0 906 018 CH
Component and/or Version: 1.8L R4/5VT G 0001
Software Coding: 16551
Work Shop Code: WSC 00028
VCID: 69A53EA70061
7 Faults Found:
17536 - Fuel Trim; Bank 1 (Mult): System too Lean
P1128 - 35-00 - -
18010 - Shareware Version. To Decode all DTCs
P1602 - 35-10 - Please Register/Activate - Intermittent
18034 - Shareware Version. To Decode all DTCs
P1626 - 35-10 - Please Register/Activate - Intermittent
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 35-10 - - - Intermittent
16685 - Shareware Version. To Decode all DTCs
P0301 - 35-10 - Please Register/Activate - Intermittent
16688 - Shareware Version. To Decode all DTCs
P0304 - 35-10 - Please Register/Activate - Intermittent
16687 - Cylinder 3: Misfire Detected
P0303 - 35-10 - - - Intermittent
VCDS-Lite Version: Release 1.2
Sunday, 10 November 2013, 13:35:12.
Control Module Part Number: 3B0 614 111
Component and/or Version: ABS/ASR 5.3 FRONT D00
Software Coding: 00021
Work Shop Code: WSC 00028
VCID: D3D97C4F32ED
1 Fault Found:
18034 - Powertrain Data Bus: Missing Message from TCU
P1626 - 35-10 - - - Intermittent
You didn't post TCU codes, are you able to scan it ?
Registered VCDS-Lite $99, will give you the code descriptions and other features, Ross Tech were allowing the $99 to go toward a full version if you later decide to upgrade.
Registered VCDS-Lite $99, will give you the code descriptions and other features, Ross Tech were allowing the $99 to go toward a full version if you later decide to upgrade.
No, I just have the shareware version. Don't have a need for the $99 version since I can actually find all the code descriptions on the net. But that aside, any other insights?
You didn't post TCU codes, are you able to scan it ?
OK, here is the most recent codes. I cleared them and then drove around for a good hour running errands.
Here are the actual codes, which is what I suspected from before. How the heck am I supposed to found where the fault lies, within the tCU itself or one of the many wires going out of it? Or even one of the wires into the ECU?? Anyone have an electrical connection issue like this?
VCDS-Lite Version: Release 1.2
Sunday, 10 November 2013, 18:28:25.
Chassis Type: 3B - VW Passat B5
Scan: 01,02,03,08,15,16,17,19,35,36,37,46,47,55,56,57,58,75,76,77
-------------------------------------------------------------------------------
Address 01: Engine Labels: Redir Fail!
Controller: 4B0 906 018 CH
Component: 1.8L R4/5VT G 0001
Coding: 16551
Shop #: WSC 00028
VCID: 69A53EA70061
1 Fault Found:
18034 - Powertrain Data Bus: Missing Message from TCU
P1626 - 35-10 - - - Intermittent
Readiness: 0000 1000
-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 8E0-614-111-ASR.LBL
Controller: 3B0 614 111
Component: ABS/ASR 5.3 FRONT D00
Coding: 00021
Shop #: WSC 00028
VCID: D3D97C4F32ED
1 Fault Found:
18034 - Powertrain Data Bus: Missing Message from TCU
P1626 - 35-00 - -
Here are the actual codes, which is what I suspected from before. How the heck am I supposed to found where the fault lies, within the tCU itself or one of the many wires going out of it? Or even one of the wires into the ECU?? Anyone have an electrical connection issue like this?
VCDS-Lite Version: Release 1.2
Sunday, 10 November 2013, 18:28:25.
Chassis Type: 3B - VW Passat B5
Scan: 01,02,03,08,15,16,17,19,35,36,37,46,47,55,56,57,58,75,76,77
-------------------------------------------------------------------------------
Address 01: Engine Labels: Redir Fail!
Controller: 4B0 906 018 CH
Component: 1.8L R4/5VT G 0001
Coding: 16551
Shop #: WSC 00028
VCID: 69A53EA70061
1 Fault Found:
18034 - Powertrain Data Bus: Missing Message from TCU
P1626 - 35-10 - - - Intermittent
Readiness: 0000 1000
-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 8E0-614-111-ASR.LBL
Controller: 3B0 614 111
Component: ABS/ASR 5.3 FRONT D00
Coding: 00021
Shop #: WSC 00028
VCID: D3D97C4F32ED
1 Fault Found:
18034 - Powertrain Data Bus: Missing Message from TCU
P1626 - 35-00 - -
What do you mean by the TCU codes? Which option on VCDS is that?You didn't post TCU codes, are you able to scan it ?
There are no fault codes other than those two modules from that I posted. But here are the readings from 02:Auto Trans in any case.
VCDS-Lite Version: Release 1.2
Monday, 11 November 2013, 10:11:23.
Control Module Part Number: 8D0 927 156 DE
Component and/or Version: AG5 01V 1.8l5VT USA 1010
Software Coding: 00104
Work Shop Code: WSC 00028
VCID: 73995CCF52AD
No fault code found.
VCDS-Lite Version: Release 1.2
Monday, 11 November 2013, 10:11:23.
Control Module Part Number: 8D0 927 156 DE
Component and/or Version: AG5 01V 1.8l5VT USA 1010
Software Coding: 00104
Work Shop Code: WSC 00028
VCID: 73995CCF52AD
No fault code found.
Looks like I found the culprit. I swapped out my tip chip from GIAC with the original and the intermittent issues have stopped. Looks like the GiAC chip probably has bad soldering or needs to be fixed.
Anyone know if GIAC has a warranty on their chips?
Anyone know if GIAC has a warranty on their chips?
1 - 11 of 11 Posts
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