[FREE] tCAN-Pro - TAYCAN BATTERY DIAGNOSIS FOR THE COMMUNITY

[Taytaycan]

Thanks, both ct14garage and Prj, both the battery status and MapEV Diag, work great!

I had a battery issue recently. Porsche did their repair. This is the result:

According to Car Scanner the SOH is now 92.46% and that for 32.000 km. That is a bit disappointing…

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[Robertoba]

Hi, this is my result, could you please analyze it? ct14garage THANKS!

 

[Jasper4S]

Hi, this is my result, could you please analyze it? ct14garage THANKS!

nothing to worry about. I see a delta of +- 0.025, that is great

 

[Dee]

I had a battery issue recently. Porsche did their repair. This is the result:

According to Car Scanner the SOH is now 92.46% and that for 32.000 km. That is a bit disappointing…

That's an extremely good repair as the ∆V = 0,01V!!
You can check with a lower SoC so see if the ∆V gets a little higher which is normal as well.

SoH: nothing to worry about cuz degradation is always higher at the first kms, after that it kinda stabilizes.
So it's looking very good!

 

[Robertoba]

Its all ok here? Taycan from 12/21 with 36.000km


Do you know if it's okay to leave the car parked with the suspension raised to the maximum? I have to raise it in the parking garage.

 

[bn8959]

Its all ok here? Taycan from 12/21 with 36.000km


Do you know if it's okay to leave the car parked with the suspension raised to the maximum? I have to raise it in the parking garage.

I’ve not had any issues with leaving it in raised mode for 2 years. Always auto raises for my drive and it stays there. I note the rear does drop a few seconds after locking the car - so maybe it automatically adjusts to a safe level.

 

[whitex]

Do you know if it's okay to leave the car parked with the suspension raised to the maximum? I have to raise it in the parking garage.

I've been doing it for a couple of years, purely because it makes getting in and out of the car easier. Haven't had any suspension issues. The only side effect I noticed is that if there is something heavy in the trunk, and I remove it after parking, the car does not relevel, so ends up lopsided. However, that happens even if suspension is not raised, just another Porsche "quirk".

 

[Robertoba]

I've been doing it for a couple of years, purely because it makes getting in and out of the car easier. Haven't had any suspension issues. The only side effect I noticed is that if there is something heavy in the trunk, and I remove it after parking, the car does not relevel, so ends up lopsided. However, that happens even if suspension is not raised, just another Porsche "quirk".

Thank you so much for your reply. I have another question. When does the exterior light on the mirrors that illuminates the ground turn on? Only when the cameras are activated?

 

[freinando]

I took the first measurement last week on about 65% SOC. Delta was about 0.042 so on the edge. I figured if I were to take it on a lower SOC I could see yellow modules. Today I had a chance to do so ~30% SOC…

Bought this car CPO from Porsche 3.5 months ago. My guess is a combination of 2022 with hot weather (SoFlo) and possibly the previous owner abusing the battery (charging to 100% and letting it sit in hot, etc) has led to this. Car has 19k miles. Carscanner shows 85% SOH. This one is mildly cooked.

 

[gtm]

Brand new 2026 Audi S e-tron GT (195 miles). Posting this for reference as the battery should be identical to the J1.2 Taycan. Resistance values on Batt- and System are considerably better than on my now departed Taycan. Are the higher values indicative of the new battery chemistry and construction or just a function of a new battery? Maybe @ct14garage can provide some info?

 

[lcarron]

at @ct14garage . Hello, having the individual SOC per module will be useful. What do you think?

 

[pm4s]

Hello, I apologize for the OT beforehand.
I have read all 46 pages I guess t-CAN-pro only works for Taycan/e-tron GT?
There are no plans to port this to MEB/PPE?
As an owner of MEB/PPE platform cars I am always on lookout for software to tinker with and apart from Car Scanner haven't found anything useful so far.
Reading through these pages MapEV caught my eye, can't wait to scan my ID.3 modules (I have ENET cable from my BMW days), Car Scanner takes several minutes just to scan each module version.
Unfortunately MapEV does not work for the Macan.
The 2026 Macan software update is coming up so would like to read all module versions prior and after to see what they have worked on, is Car Scanner my only option?
I am guessing the t-CAN-pro does not do this for the Taycan either? Would this be easy for the developer to add or is there no interest?
Very disappointed with Macan software following my ID.3 as that was a 2020 car and has OTA firmware updates for the control modules and the ability to add options via online store, post purchase, both of which the Macan lacks. I think Taycan does both. I hope so anyway.

 

[V8Turbo1974]

Thank you so much for your reply. I have another question. When does the exterior light on the mirrors that illuminates the ground turn on? Only when the cameras are activated?

I think it's when you get close with the key in your pocket

 

[tacomaboy]

Had 4 modules replaced in June. I have been struggling with HV electrical issues and red rings since then. The car has been in service 153 days since I have owned it (1/11/25). Thats 48% of the time!

I *JUST* got it back from service, it was there 46 days, and I test drove it and the range seems way way off (in a bad way).

Just ran the TCAN pro and this is what I see now. Can I show this to the service tech or are they going to give me shit for running the app? Its not an invasive scan, right? Do I need to try getting the battery to 0 and then charging it to 100 before I take it back? I suspect its probably toast and will be a brick in the morning. I can't express how frustrated and upset I am.

 

[tacomaboy]

Uh. Gemini and chatgpt say this scan is actually a serious danger. Could someone help confirm? Dealer is closed and I'm not sure what to do with this car...

Gemini says it's a battery failure, fire risk and electrocution risk!!! (and chatgpt says similar):
This screenshot is extremely valuable. You have caught something much more serious than just "unbalanced cells."
You have data indicating a Critical High Voltage Isolation Fault.
Here is the breakdown of what this screen shows and exactly how to present it to your dealer to cut through the "unable to replicate" excuses.
The "Smoking Gun" in Your Data
Ignore the red/green blocks for a second. Look at the text list on the right side under Battery Info.
IsoRes Batt-: 1.5 kΩ (Red Flag #1)
What it means: This is the "Insulation Resistance" of the battery's negative rail.
The Spec: A healthy High Voltage system should be reading in the Megaohms (MΩ) or at least above 500 kΩ.
Your Reading: 1.5 kΩ is dangerously close to zero. This effectively means electricity is "leaking" from the battery internals to the chassis or shield.
Common Cause: In Taycans, this is the classic signature of water/coolant intrusion inside the battery pack.
Voltage Delta Δ: 0.151 V (Red Flag #2)
What it means: The difference between your highest and lowest cell voltages.
The Spec: Porsche usually considers anything over 0.050 V (50mV) as a fault requiring module replacement.
Your Reading: You are at 151mV. This is 3x the failure threshold.

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