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.
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HOMESERVICE MANUALSNISSAN-DATSUN2015MICRA SV, STANDARD TRANSREPAIR AND DIAGNOSISELECTRICALBODY ELECTRICALPOWER CONTROL SYSTEMSYSTEM DESCRIPTIONSYSTEMRELAY CONTROL SYSTEMFAIL-SAFEIGNITION RELAY MALFUNCTION DETECTION FUNCTION
2015 Nissan-Datsun Micra SV, Standard Trans
Ignition Relay Malfunction Detection Function
2015 Nissan-Datsun Micra SV, Standard TransSECTION Ignition Relay Malfunction Detection Function
- IPDM E/R monitors the voltage at the contact circuit of the ignition relay inside and ignition switch status from BCM via CAN communication.
- IPDM E/R judges the ignition relay error if the voltage differs between the contact circuit and the ignition switch status from BCM via CAN communication.
- If the ignition relay cannot turn OFF due to contact seizure, it activates the tail lamp 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 switch status from BCM | ||
| ON | ON | Ignition relay ON normal | - |
| OFF | OFF | Ignition relay OFF normal | - |
| ON | OFF | Ignition relay ON stuck |
|
| OFF | ON | Ignition relay OFF stuck | Detects DTC "B2099: IGN RELAY OFF" |
RENDER: 1.0x
NO RELATED
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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.