[craz]

Most people use the Joint connector near radar and not wired to FBCM for the reasons you're pointing out.
Try to find the JOINT Connector C42, it should be located next to the washer fluid reservoir as depicted on the diagram. Grab Ignition power and ground from the headlight leveling module or wired 12V direct from the fuse box.

 

[Jitto]

On the midle connector is BUS (R,L and P,N) both is CAN BUS. The question is: which is for Radar? In my car I have not R,L . CX5 2018 2.0

Hi @Diamonds_T how did you manage to pass thru the cables to behind the FBCM connector?

 

[Jitto]

Bracket originally using TN40 50 721B (w/o adaptive w/ surround view)

Almost got it wrong using TK79 50 721A (w/ adaptive, but w/o surround view)

Right one is TN44 50 721B, with notes. It doesn't 100% fit with my surround view camera (its suitable for upgraded surround view cam, mine was older version), but you can still mount it anyway, though not flush fit

Bus connected directly to the module just inside fuse box, didn't know there's one near windshield liquid box

Hi @ciforia , I was wondering if you could share how you routed the radar wiring to the module inside the fuse box. Any photos would be super helpful 🙂. I'd also love to hear about your strategy—I’ve been struggling to get the radar cables into the fuse box.

 

[Jitto]

Most people use the Joint connector near radar and not wired to FBCM for the reasons you're pointing out.
Try to find the JOINT Connector C42, it should be located next to the washer fluid reservoir as depicted on the diagram. Grab Ignition power and ground from the headlight leveling module or wired 12V direct from the fuse box.

View attachment 303713

Hi @craz , first of all, thanks for taking the time to reply to my message!

I was just wondering—would it be possible to connect directly to the C-01 Emissions Harness located in the fuse box or is safer to do it on the FBCM? I haven’t been able to find the pinout for the C-01 connector yet, though.

 

[FartInTheWind]

Hi @Diamonds_T how did you manage to pass thru the cables to behind the FBCM connector?

I did this by removing this cover separately and just sliding those wires in through the gap

However, if I was gonna do it again, I wouldn't do it this way. I'd recommend the way craz mentioned, using two wires near the washer bottle and getting power somewhere else, it's how it came from factory and is a much cleaner way.

 

[Jitto]

Bracket originally using TN40 50 721B (w/o adaptive w/ surround view)

Almost got it wrong using TK79 50 721A (w/ adaptive, but w/o surround view)

Right one is TN44 50 721B, with notes. It doesn't 100% fit with my surround view camera (its suitable for upgraded surround view cam, mine was older version), but you can still mount it anyway, though not flush fit

Bus connected directly to the module just inside fuse box, didn't know there's one near windshield liquid box

Hi @ciforia, could you please share your ASBUILD file from IC? I’ve been trying various possibilities, but some have given me errors of incompatibility with the MRCC module, while others have resulted in FSC errors. It would be very helpful to understand the differences between my car and yours.

 

[Jitto]

Hi @craz I finally decided to take the simple route and drilled a hole at the bottom of the fuse box to access the FBCM wiring harness. I connected the wires using 20 AWG Posi-Taps, and voilà — the radar is now detected by the car. Thanks for the help!

However, I’m now stuck on the module configuration. I’m using the calculator by @SergSlim (Thanks for your work), but I’ve noticed that some of the guidance in the Excel sheet doesn’t fully align with my vehicle. For example, my car doesn’t have Stop & Go (or MRCC), yet the byte that activates it is showing as ON as factory.

I’ve tried several combinations, but I always get the same errors:
• U2300:56 – Invalid configuration
• C0063:54 – Missing calibration

And when i try to add for instance SBS and MRCC just to try i start getting errors from other modules but keeping the invalid configuration and missing calibration.

Obviously, I can’t proceed with calibration until the invalid configuration error is resolved.

I’m unsure about what should be enabled under FOW/SBS/DRSS/MRCC in 720-04-17, since my car originally came with Advance SCBS, not SBS. I’m also uncertain about the region field in 720-04-18 — my car is configured for LATAM, but that region doesn’t appear as an option in the calculator.

I’ve been considering whether I need to change the region code (e.g., in 720-01-01) to one where MRCC is available first.

Any help or guidance would be greatly appreciated! For futhher references my car is a Mazda CX-9 2023 GTX (Top of the line here), but in my country we got stuck on gen 1 Mazda Connect but including the Advance SCBC. VIN:

JM7TC4WLAS0483192

 

[FartInTheWind]

Hi @craz I finally decided to take the simple route and drilled a hole at the bottom of the fuse box to access the FBCM wiring harness. I connected the wires using 20 AWG Posi-Taps, and voilà — the radar is now detected by the car. Thanks for the help!

However, I’m now stuck on the module configuration. I’m using the calculator by @SergSlim (Thanks for your work), but I’ve noticed that some of the guidance in the Excel sheet doesn’t fully align with my vehicle. For example, my car doesn’t have Stop & Go (or MRCC), yet the byte that activates it is showing as ON as factory.

I’ve tried several combinations, but I always get the same errors:
• U2300:56 – Invalid configuration
• C0063:54 – Missing calibration

And when i try to add for instance SBS and MRCC just to try i start getting errors from other modules but keeping the invalid configuration and missing calibration.

Obviously, I can’t proceed with calibration until the invalid configuration error is resolved.

I’m unsure about what should be enabled under FOW/SBS/DRSS/MRCC in 720-04-17, since my car originally came with Advance SCBS, not SBS. I’m also uncertain about the region field in 720-04-18 — my car is configured for LATAM, but that region doesn’t appear as an option in the calculator.

I’ve been considering whether I need to change the region code (e.g., in 720-01-01) to one where MRCC is available first.

Any help or guidance would be greatly appreciated! For futhher references my car is a Mazda CX-9 2023 GTX (Top of the line here), but in my country we got stuck on gen 1 Mazda Connect but including the Advance SCBC. VIN:

JM7TC4WLAS0483192

Try:
Market: 110 — US/Asia/Aus or 111 — US/Asia/Aus
720-04-17 B2: 0111 - SBS/DRSS/MRCC
Stop & Go - Ignore it for now, I had the same configuration regarding this as you do, and mine is manual so for sure it didn't have no stop and go.
720-04-23 B4: 011 - Standard MRCC

Also, check your RBCM block for 7B7-01-01 B3 - Brake light, set it to 01 if it's not. In fact, I think you should set this first before setting anything in IC.

 

[Jitto]

Try:
Market: 110 — US/Asia/Aus or 111 — US/Asia/Aus
720-04-17 B2: 0111 - SBS/DRSS/MRCC
Stop & Go - Ignore it for now, I had the same configuration regarding this as you do, and mine is manual so for sure it didn't have no stop and go.
720-04-23 B4: 011 - Standard MRCC

Also, check your RBCM block for 7B7-01-01 B3 - Brake light, set it to 01 if it's not. In fact, I think you should set this first before setting anything in IC.

@FartInTheWind
I just tried Market settings 110 and 111, but neither worked. I already have 720-04-23 B4 set to 011, and my RBCM block 7B7-01-01 B3 was factory-set to 01.

Is there anything else I might be missing or doing wrong?

 

[FartInTheWind]

@FartInTheWind
I just tried Market settings 110 and 111, but neither worked. I already have 720-04-23 B4 set to 011, and my RBCM block 7B7-01-01 B3 was factory-set to 01.

Is there anything else I might be missing or doing wrong?

Do you still have the part code for the radar you used?

 

[SergSlim]

Mazda CX-9

Try these values in BF-05:

Those 3 options are the ones that CX-9 with MRCC have from factory.

I hope you know what BF is and where to put those values.

720-04-23 B4 has value 31 in all of those cars

 

[Jitto]

Do you still have the part code for the radar you used?

KB8C67XA1

 

[Jitto]

Try these values in BF-05:
View attachment 304109
Those 3 options are the ones that CX-9 with MRCC have from factory.

I hope you know what BF is and where to put those values.

720-04-23 B4 has value 31 in all of those cars

Thanks for the reply! I've been researching and found that those values have different configurations than mine.

Digging the changes many permanent values are changed or show states where "function is unknown." Is there any risk in trying them?

 

[SergSlim]

Thanks for the reply! I've been researching and found that those values have different configurations than mine.

Digging the changes many permanent values are changed or show states where "function is unknown." Is there any risk in trying them?

Send a screenshot with what you're talking about. Those BF values which I sent don't contradict with permanent values which are in the table.

 

[Jitto]

Send a screenshot with what you're talking about. Those BF values which I sent don't contradict with permanent values which are in the table.

You were right, @SergSlim — I made a fat finger mistake. Those values only modify MRCC parameters.

Once I corrected the error, I tested all three FB-05 values, but none resolved the E2300:56 error. On top of that, two of them triggered U0316:09 (software incompatibility with the vehicle's DCM, indicating component failure).

What might I be missing here? Also, I’ve noticed that U0001:88 (High Speed CAN Communication BUS – Bus OFF Failure) keeps showing up when I drive.

 

[Jitto]

You were right, @SergSlim — I made a fat finger mistake. Those values only modify MRCC parameters.

Once I corrected the error, I tested all three FB-05 values, but none resolved the E2300:56 error. On top of that, two of them triggered U0316:09 (software incompatibility with the vehicle's DCM, indicating component failure).

What might I be missing here? Also, I’ve noticed that U0001:88 (High Speed CAN Communication BUS – Bus OFF Failure) keeps showing up when I drive.

I was thinking that maybe the issue is the radar I’m using — I have the older version (KB8C-67-XA1), and vehicles from 2019 onward might use a newer version (KD7J-67-XA1K). What do you think?
Or does the error simply indicate an IC configuration issue?

 

[Jitto]

Yes you need to replace the ABS pump to get STOP and GO working but I think you can get away by just replacing the electronics part of the ABS module, so you don't have to bleed the brakes. Part # TMY3-43-7A0 from a 2018 CX-9 is a good match but they are many others.
2018 Mazda CX-9 ABS Control Unit TMY3-43-7A0 | Mazda-Parts
Check this russian blog Бортжурнал Mazda CX-9 Stop&Go

Hey @craz , are you certain the TMY3-43-7A0 is compatible with a 2021 CX-9? From what I’ve seen, the ABS pump part numbers seem to vary by year.

Model	Year(s)	ABS Pump Part #
Mazda CX-9	2018	TMY3-43-7A0
Mazda CX-9	2019	TNY1-43-7A0
Mazda CX-9	2020–2023	TAY1-43-7A0

@ciforia Which ABS pump did you end up using for your CX-9? I’ve got a 2023 model and mistakenly bought the 2018 unit thinking it was compatible—but now I’m starting to doubt that

 

[SergSlim]

I was thinking that maybe the issue is the radar I’m using — I have the older version (KB8C-67-XA1), and vehicles from 2019 onward might use a newer version (KD7J-67-XA1K). What do you think?
Or does the error simply indicate an IC configuration issue?

KB8C-67-XA1 - 2017 MY CX-5. In Europe it was not used in CX-9
KD7J-67-XA1K (Strong radio wave) - 2021-2022 MY CX-9.
K131-67-XA1J (Weak radio wave) - 2021-2022 MY CX-9.

So yeah, considering your car is not 2017 MY CX-5, and you installed radar from it into CX-9, which never had such radar from factory (at least in Europe) - it might be the reason of your issues.

TAY1-43-7A0 - ABS in 2021-2022 MY CX-9 with support of Full Range ACC.

 

[emach2036]

I was thinking that maybe the issue is the radar I’m using — I have the older version (KB8C-67-XA1), and vehicles from 2019 onward might use a newer version (KD7J-67-XA1K). What do you think?
Or does the error simply indicate an IC configuration issue?

¡Hola Jitto!

También quiero habilitar MRCC en mi CX5 2024 en Chile. ¡Me encantaría escuchar cómo te ha ido con el proyecto!

 

[rixm6]

¡Hola Jitto!

También quiero habilitar MRCC en mi CX5 2024 en Chile. ¡Me encantaría escuchar cómo te ha ido con el proyecto!

Kǎi kuu peale ahv