Animated tail lights - project opportunity

[mystermykee]

Well, I've spent about the last month trying to get this to work. Here's where I currently stand.

Wired all 4 tail light pin 3s to the BCM2 C5 LIN on black 32pin connector (same bus as the kick sensor/siren, which both work fine). Coded BCM2: all four IntelTailLight bits = installed, can_lin_signature_routing = active, and even ported the MY25 light channel dataset (7202) into my gen1 coding — car took it all.

Results so far: BCM2 is definitely polling the lamps — I get 4 active "tail lamp no signal" faults that won't clear, and PIWIS now shows Rear Light Left/Right 1/2 UDS nodes plus per-lamp coding records (all unreadable since the lamps don't answer).

So software side is done and verified, lamps just won't talk (unless there's something else I'm missing). I'm beginning to think the gen1 lamps didn't actually ship with the necessary hardware to do such animations, even though they have LIN connectors.

9JA:945.081. 05.10.2023
GEN LEVEL: 03S
SW:2SD.2668
HW: H05
2SK 015.387-60
Z Leuchtenband ECE Exclusive
LAMP ASSY REAR ECE TG T2 PORSCHE J1 EXCLUSIVE

And if I click into one of the rear light UDS modules....nothing.

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[mystermykee]

I've also inquired about the .2 ECE/ROW taillights sets and the two places I've called don't have an in stock date from Germany listed--my guess is all the ones they have are going onto new builds.

 

[whitex]

Wow, you sure pushed this forward quite a bit! NICE!

Have you tried probing the LIN bus to see whether the BCM is initiating any LIN bus transactions and if there is any activity and/or any attempt at response from the lights?

 

[mystermykee]

Wow, you sure pushed this forward quite a bit! NICE!

Have you tried probing the LIN bus to see whether the BCM is initiating any LIN bus transactions and if there is any activity and/or any attempt at response from the lights?

No, only have a DMM on it so far, which shows the bus idling 9-12V at my tap but obviously can't show frames. Unfortunately, I don't have an analyzer tool. Indirect evidence says the BCM is polling with the intelligent tail light bits coded, BCM2 sets four active "no signal" faults that won't clear. That's it timing out on response slots for all four lamps. Kick sensor and siren on the same LIN work fine, so the master side is healthy.

 

[whitex]

No, only have a DMM on it so far, which shows the bus idling 9-12V at my tap but obviously can't show frames. Unfortunately, I don't have an analyzer tool. Indirect evidence says the BCM is polling with the intelligent tail light bits coded, BCM2 sets four active "no signal" faults that won't clear. That's it timing out on response slots for all four lamps. Kick sensor and siren on the same LIN work fine, so the master side is healthy.

When I was probing my Euro lights, there were pulses on the LIN pin whenever I applied turn signal voltage for example, so that would tell me those are not disconnected altogether inside the light. Is it possibly that the CAN addressing is different? It should be possible to scan the LIN bus of the tail lights for all 64 addresses see if any of them respond - you'd do that out of the car.

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