⌛Y3 Roof Diagnostic System (for all BMW convertible & roadster)

RobbiZ4 · Post by **RobbiZ4** » Wed Nov 03, 2021 8:35 pm

Thanks for confirming.

Pondrew · Post by **Pondrew** » Wed Nov 03, 2021 9:13 pm

RobbiZ4 wrote: ↑Wed Nov 03, 2021 8:35 pm Thanks for confirming.

I only see the following in Firefox:

Blame Brexit

enuff_zed · Post by **enuff_zed** » Wed Nov 03, 2021 9:17 pm

Pondrew wrote: ↑Wed Nov 03, 2021 9:13 pm
RobbiZ4 wrote: ↑Wed Nov 03, 2021 8:35 pm Thanks for confirming.

I only see the following in Firefox:
Blame Brexit

Just Robbi's inventive way of bumping his thread

Prodjay10 · Post by **Prodjay10** » Thu Nov 04, 2021 4:54 am

What would the this run?

enuff_zed · Post by **enuff_zed** » Thu Nov 04, 2021 10:32 am

Prodjay10 wrote: ↑Thu Nov 04, 2021 4:54 am What would the this run?

???
It doesn't 'run' anything per se, it's a fiendishly clever box of tricks, developed by Robbi (and his minions

) to diagnose any issue with the roof on the E89 by monitoring the sequences of every switch, relay etc.
Knowing the Germans' propensity for engineering perfection I suspect it will also make you a coffee while you wait.

RobbiZ4 · Post by **RobbiZ4** » Thu Nov 04, 2021 12:01 pm

enuff_zed wrote: ↑Thu Nov 04, 2021 10:32 am ...I suspect it will also make you a coffee while you wait.

... and finally it's able to clean up the dishes.

Marcoose · Post by **Marcoose** » Thu Nov 04, 2021 12:12 pm

Robbi, echoing others, this is brilliant work indeed. Wunderbar!

I’ve been reading your advices here and elsewhere. You say all roofs eventually fail. Would you advise to preemptively replace all parts that normally fail? How long would them last? Or wait until the failures pop up?

You’ve also offered to travel. (California is beautiful this time of the year.) It’d be great to understand how much that would cost.

Thanks.

Marc.

RobbiZ4 · Post by **RobbiZ4** » Thu Nov 04, 2021 12:41 pm

This thread is regarding the Y3 Diagnostic System and should be kept clean.

RobbiZ4 · Post by **RobbiZ4** » Fri Jan 14, 2022 10:34 am

RobbiZ4 wrote: ↑Fri May 21, 2021 11:42 pm As of today, I've completed the next concentrator box (BlueBox K2) for another couple of BMW convertibles:
[...]
Schema of 1 Y-cable placed between the roof loom and the CTM...

Interesting story regarding the usage of wire "harness" or "loom"
https://www.interconnect-wiring.com/blo ... led-looms/

"The term “loom” was commonly used in the aerospace and automotive industry half a century ago. A wiring loom, also known as a harness, wire harness, cable assembly, wiring assembly or wiring harness, is an assembly of wires which transmit signals or electrical power. The wire looms are bound together by braiding, straps, cable ties, cable lacing, sleeves, electrical tape, conduit, a weave of extruded string, or a combination thereof. So, the word wiring harness and wire loom are interchangeable..."

RobbiZ4 · Post by **RobbiZ4** » Wed Jan 26, 2022 6:25 pm

You always have to consider that a sensor can not only fail completely, but can also change its switching state with a delay. The CTM always checks the timing as well.

In the following chart, you'll see an unexpected delay of about 1-2 seconds.

: Messung03-2_Opening.jpg (9.67 KiB) Viewed 1301 times

Time to change both microswitches.

RobbiZ4 · Post by **RobbiZ4** » Wed Jan 26, 2022 6:29 pm

Another interesting result of my Y3 Roof Diagnostic System is the following:

The CTM sends a short current pulse to all the relays and solenoids before starting a roof operation.

Classiccarman2 · Post by **Classiccarman2** » Sat Mar 26, 2022 1:17 pm

I have my roof stuck in the closed condition.
Last winter I discovered a flooded battery well which I dried out. The sponge was sodden. I removed the pump motor which was full of black water and cleaned and dried it. I topped up the fluid reservoir and luckily this seemed to cure the problem after a few cycles to bleed the hydraulics.

This spring I checked for water and the sponge cradle was damp, blut the motor was ok. The roof opened ok but now I can't close it. You just get the dong and the red roof symbol on the dash. I have removed and checked the salmon relays which seem to work ok. I noticed they are different pin connections from standard relays so you have to buy the BMW item

Is there anything else I can check? It's a bit difficult to check anything with the roof stuck in the boot.

na51hog · Post by **na51hog** » Sat Mar 26, 2022 2:52 pm

Can you read the roof fault code(s) from the OBDII port either using something like the Ancel BM700 tool or an app like Protools or Carly with the appropriate OBDII Bluetooth adapter?

meniack · Post by **meniack** » Fri May 20, 2022 7:45 am

Hello,
I am desperate to solve my. Z4 top problems without spending 5,000 or more us. Is your y3 diagnostic tool available in the us?

Smartbear · Post by **Smartbear** » Fri May 20, 2022 9:07 am

meniack wrote: ↑Fri May 20, 2022 7:45 am Hello,
I am desperate to solve my. Z4 top problems without spending 5,000 or more us. Is your y3 diagnostic tool available in the us?

Have you looked at the guides on here? They will give you a good idea what’s involved - use the search function.
Rob

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