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.
2012 Infiniti M35hFACTORY OEM SERVICE PROCEDURE
DTC Detection Logic
| DTC No. | Trouble diagnosis name (Trouble diagnosis content) | DTC detecting condition | Possible cause |
|---|---|---|---|
| U0293 | LOST COMM (HV ECU) (Lost communication with HPCM) | ECM cannot receive a CAN communication signal from HPCM for 2 seconds or more in a row. | Harness or connectors (CAN communication line is open or shorted) |
| ECM cannot receive a CAN communication signal from HPCM for a short period of less than 2 seconds. | Harness or connectors (Intermittent malfunction in the CAN communication circuit) |
Factory Service Tools
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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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