Mazda U0415
MAZDA RADAR CRUISE CONTROL (MRCC)/SMART BRAKE SUPPORT (SBS)○ U0420:00 - MAZDA RADAR CRUISE CONTROL (MRCC)/SMART BRAKE SUPPORT (SBS)○ Multiple DTC's (U0XXX:00 COMMUNICATION ERROR)○
Quick answer
For verified Mazda CX-90 and MX-30 US applicability (2022–2024), U0415:00 is documented with U0420:00 and multiple U0XXX:00 communication-error DTCs in Mazda service communications. The cited bulletins direct technicians to check for an aftermarket device connected to DLC-2 and advise its removal if found.
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1. What does U0415 mean?
For verified Mazda CX-90 and MX-30 US applicability (2022–2024), U0415:00 is documented with U0420:00 and multiple U0XXX:00 communication-error DTCs in Mazda service communications. The cited bulletins direct technicians to check for an aftermarket device connected to DLC-2 and advise its removal if found.
2. Technical explanation
The supplied official Mazda communications list U0415:00 as “Mazda Radar Cruise Control (MRCC)/Smart Brake Support (SBS)” together with U0420:00 and multiple U0XXX:00 communication errors. The evidence excerpt associates these codes with a diagnostic scenario involving DLC-2 female terminals being spread open and instructs inspection for an aftermarket device connected to DLC-2. The full diagnostic path beyond that excerpt is not yet established by verified evidence.
3. What system is affected?
Mazda Radar Cruise Control (MRCC) / Smart Brake Support (SBS), with documented communication-error DTCs.
4. How serious is this code?
Not yet established by verified evidence.
5. Symptoms you may notice
- U0415:00 may be stored together with U0420:00 and multiple U0XXX:00 communication-error DTCs.
6. Possible causes
- An aftermarket device connected to DLC-2 is specifically addressed in the verified Mazda service communications.
- DLC-2 female terminals being spread open are referenced in the verified evidence.
- Any additional cause is not yet established by verified evidence.
7. Can I still drive the vehicle?
Not yet established by verified evidence.
8. Can I charge the vehicle?
Not yet established by verified evidence.
9. What you can safely do
- Do not attempt high-voltage system repairs.
- If an aftermarket device is connected to DLC-2, the verified Mazda bulletin advises removal.
- Arrange professional diagnosis if the code is present.
10. Step-by-step troubleshooting
- A technician should inspect whether an aftermarket device is connected to DLC-2, as directed by the verified Mazda communication.
- The supplied evidence references DLC-2 female terminal condition; detailed inspection or repair procedures are not established by the provided excerpt.
11. When to contact service
Contact a Mazda dealer or qualified service provider for diagnosis, particularly if U0415:00 appears with U0420:00 or multiple U0XXX:00 communication-error codes.
12. What the service center may check
- Check for an aftermarket device connected to DLC-2.
- If an aftermarket device is found, document it on the repair order and advise customer removal, as stated in the cited Mazda communications.
- Assess the DLC-2 female terminals as applicable under Mazda diagnostic procedures; the supplied excerpt does not provide the complete procedure.
13. Possible repair or resolution
- Remove an aftermarket device from DLC-2 if present, consistent with the verified Mazda bulletin.
- Further repair resolution is not yet established by verified evidence.
14. Affected vehicles
- Mazda CX-90 · 2022–2024 · US
- Mazda MX-30 · 2022–2024 · US
15. Related TSBs / service bulletins
- Mazda service alert SA-032-23, published May 24, 2023; NHTSA manufacturer communication MC-10237216: https://static.nhtsa.gov/odi/tsbs/2023/MC-10237216-0001.pdf
- Mazda service alert SA-032-23a, published October 11, 2023; NHTSA manufacturer communication MC-10244679: https://static.nhtsa.gov/odi/tsbs/2023/MC-10244679-0001.pdf
16. Recall information
- Not yet established by verified evidence.
17. Official manufacturer information
Verified applicability: Mazda CX-90 and Mazda MX-30, US market, model years 2022–2024. Official evidence consists of Mazda manufacturer communications published through NHTSA: SA-032-23 and SA-032-23a.
19. Frequently asked questions
What does U0415:00 mean in the supplied Mazda evidence?
It is listed as a Mazda Radar Cruise Control (MRCC)/Smart Brake Support (SBS) code, appearing with U0420:00 and multiple U0XXX:00 communication errors.
Does Mazda identify an aftermarket DLC-2 device as relevant?
Yes. The verified service communications instruct technicians to check for an aftermarket device connected to DLC-2 and advise customer removal if one is found.
Is this confirmed as a recall?
Not yet established by verified evidence.
Is it safe to drive or charge?
Not yet established by verified evidence.