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.
System Description
IPDM E/R activates the internal control circuit to perform the relay ON-OFF control according to the input signals from various sensors and the request signals received from control units via CAN communication.
| Control relay | Input/output | Transmit unit | Control part | Reference | ||
|---|---|---|---|---|---|---|
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BCM (CAN) |
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| Front fog lamp relay | Front fog light request signal | BCM (CAN) | Front fog lamp |
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| Tail lamp relay | Position light request signal | BCM (CAN) |
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| Illuminations | ILLUMINATION CONTROL SYSTEM | |||||
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Front wiper request signal | BCM (CAN) | Front wiper | FRONT WIPER AND WASHER SYSTEM | ||
| Front wiper stop position signal | Front wiper motor | |||||
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BCM (CAN) |
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VEHICLE SECURITY SYSTEM | ||
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Starter control relay signal | BCM (CAN) | Starter motor | B210D STARTER RELAY , B210B STARTER CONTROL RELAY | ||
| Steering lock unit condition signal | Steering lock unit | |||||
| Starter relay control signal | TCM | |||||
| Steering lock relay | Steering lock relay signal | BCM (CAN) | Steering lock unit | B2108 STEERING LOCK RELAY | ||
| Steering lock unit condition signal | Steering lock unit | |||||
| Control device (Detention switch) signal | Control device (Detention switch) | |||||
| A/C relay | A/C compressor request signal | ECM (CAN) | A/C compressor (magnet clutch) | MAGNET CLUTCH CONTROL SYSTEM | ||
| Ignition relay | Ignition switch ON signal | BCM (CAN) | Ignition relay | B2098 IGNITION RELAY ON STUCK | ||
| Vehicle speed signal | Unified meter and A/C amp. (CAN) | |||||
| Push-button ignition switch signal | Push-button ignition switch | |||||
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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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