Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2022 Mazda 3 BaseFACTORY OEM SERVICE PROCEDURE
Electrical Supply Unit (ESU)
ELECTRICAL SUPPLY UNIT (ESU) DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Refer to |
|---|---|
| B1277:14 | (See DTC B1277:14 (BCM) .) |
| B1329:14 | (See DTC B1329:14 (BCM) .) |
| B132A:14 | (See DTC B132A:14 (BCM) .) |
| B1510:14 | (See DTC B1510:14 (BCM) .) |
| B1511:14 | (See DTC B1511:14 (BCM) .) |
| B1D39:11 | (See DTC B1D39:11 (BCM) .) |
| B1D39:12 | (See DTC B1D39:12 (BCM) .) |
| B1D39:13 | (See DTC B1D39:13 (BCM) .) |
| B2002:49 | (See DTC B2002:49 (BCM) .) |
| B2002:55 | (See DTC B2002:55 (BCM) .) |
| B2002:56 | (See DTC B2002:56 (BCM) .) |
| B2002:62 | (See DTC B2002:62 (BCM) .) |
| C0023:14 | (See DTC C0023:14 (BCM) .) |
| U2628:14 | (See DTC U2628:14 (BCM) .) |
| U2629:14 | (See DTC U2629:14 (BCM) .) |
| U262A:14 | (See DTC U262A:14 (BCM) .) |
| U262B:14 | (See DTC U262B:14 (BCM) .) |
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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