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.
2013 Infiniti M37 BaseFACTORY OEM SERVICE PROCEDURE
Ignition Relay Malfunction Detection Function
- IPDM E/R monitors the voltage at the contact circuit and excitation coil circuit of the ignition relay inside it.
- IPDM E/R judges the ignition relay error if the voltage differs between the contact circuit and the excitation coil circuit.
- If the ignition relay cannot turn OFF due to contact seizure, it activates the tail lamp relay and daytime running light relay for 10 minutes to alert the user to the ignition relay malfunction when the ignition switch is turned OFF.
Voltage judgment IPDM E/R judgment Operation Ignition relay contact side Ignition relay excitation coil side ON ON Ignition relay ON normal - OFF OFF Ignition relay OFF normal - ON OFF Ignition relay ON stuck - Detects DTC "B2098: IGN RELAY ON"
- Turns ON the tail lamp relay and daytime running light relay for 10 minutes
OFF ON Ignition relay OFF stuck Detects DTC "B2099: IGN RELAY OFF"
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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