Rennlist

TCU vanished, plug issue or failure ?

Add to repair workspace

New repair projectOpen repair workspace

Original source

4 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHTCU vanished, plug issue or failure ?

Leading reported evidence

Disconnect battery

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that performed work without a confirmed outcome: 1
Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster
2 weeks ago I disconnected the battery to remove it and clean the front drains, as well as install a 2-din Kenwood.
Original post Read captured discussion
TCU vanished, plug issue or failure ?

Suggestion
Have you tried the throttle adaptation procedure since disconnecting the battery?
Original post Read captured discussion
TCU vanished, plug issue or failure ?

Frequently discussed work

Clean front drains, as well as install a 2-din kenwood

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster
2 weeks ago I disconnected the battery to remove it and clean the front drains, as well as install a 2-din Kenwood.
Original post Read captured discussion
TCU vanished, plug issue or failure ?

Read full discussion summary

Leading evidence: 'Disconnect battery' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Clean front drains, as well as install a 2-din kenwood' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.

Read captured replies

1 matching discussions · 4 captured posts examined · 0 partial discussions

Compare 3 other evidence results

Use foxwell nt510 obd scanner

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster
I use a Foxwell NT510 OBD scanner which has worked very well at helping me get codes and affect repairs.
Original post Read captured discussion
TCU vanished, plug issue or failure ?

Clean front drains, as well as install a 2-din kenwood

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster
2 weeks ago I disconnected the battery to remove it and clean the front drains, as well as install a 2-din Kenwood.
Original post Read captured discussion
TCU vanished, plug issue or failure ?

Run through the warm up cycle all the way

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster
The car will run through the warm up cycle all the way to operating temp, and will shift into gear, reverse and forward gears ( idle speed) There are no error codes on the dash, and the car is not in limp mode.
Original post Read captured discussion
TCU vanished, plug issue or failure ?

Frequently discussed actions (4)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Clean front drains, as well as install a 2-din kenwood

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster
2 weeks ago I disconnected the battery to remove it and clean the front drains, as well as install a 2-din Kenwood.
Original post Read captured discussion
TCU vanished, plug issue or failure ?

Disconnect battery

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that performed work without a confirmed outcome: 1
Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster
2 weeks ago I disconnected the battery to remove it and clean the front drains, as well as install a 2-din Kenwood.
Original post Read captured discussion
TCU vanished, plug issue or failure ?

Suggestion
Have you tried the throttle adaptation procedure since disconnecting the battery?
Original post Read captured discussion
TCU vanished, plug issue or failure ?

Run through the warm up cycle all the way

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster
The car will run through the warm up cycle all the way to operating temp, and will shift into gear, reverse and forward gears ( idle speed) There are no error codes on the dash, and the car is not in limp mode.
Original post Read captured discussion
TCU vanished, plug issue or failure ?

Use foxwell nt510 obd scanner

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster
I use a Foxwell NT510 OBD scanner which has worked very well at helping me get codes and affect repairs.
Original post Read captured discussion
TCU vanished, plug issue or failure ?

Coverage and how to read this overview

Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.

4 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

Rennlist: 1 discussions

0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.

0 acknowledgements have no verified action link; they do not establish a repair result.

Generation: 20261026T183130Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Greetings flat six fans !!! I have an interesting problem, and before I start pulling parts and panels I thought I would pass it by the group.. My car is a 2002 cabriolet with a Fabspeed exhaust, 101763 miles, 30,000 of are mine. The car is a weekend driver, except for me it is an 85 mph and 900 mile weekend. I use a Foxwell NT510 OBD scanner which has worked very well at helping me get codes and affect repairs. 2 weeks ago I disconnected the battery to remove it and clean the front drains, as well as install a 2-din Kenwood. I snaked the A/C plugs down the back of the center console with not much problem. Except.......after putting everything back; the car starts just fine, but I no longer have any throttle response, the pedal is dead. The car will run through the warm up cycle all the way to operating temp, and will shift into gear, reverse and forward gears ( idle speed) There are no error codes on the dash, and the car is not in limp mode. When i check the diagnostics, the tiptronic transmission does not show up, no communication, it's not there so i can't even get fault codes. Do TCU's die like that ? or did i break a wire fishing the A/C cables down the back of the console ? Please advise, Steve G

POST 2Original post

Un-install your Kenwood. Sounds like you have shorted your CANbus .It is a twisted pair of wires that runs from radio,instrument cluster, a/c,DME, TCU ect. It is the communication network between components.

POST 3Original post

Quotes source post: 14704460

Also check that you didn't accidentally disconnect your accelerator pedal, someone did this just the other day, they found the wire plug , but couldn't find where it went (it went behind the accelerator pedal) .lol

POST 4Original post

I agree - sounds like the e-gas pedal is disconnected. Have you tried the throttle adaptation procedure since disconnecting the battery? (Ignition on for 60 seconds without touching throttle, then 10 seconds off, then start the car.)

This is a source reference. Confirm exact model applicability in the original material.