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 | ||
|---|---|---|---|---|---|---|
|
|
BCM (CAN) |
|
HEADLAMP (LO) CIRCUIT , HEADLAMP (LO) CIRCUIT (with xenon headlamps) HEADLAMP (HI) CIRCUIT , HEADLAMP (HI) CIRCUIT (with halogen headlamps) | ||
| Front fog lamp relay (if equipped) | Front fog light request signal | BCM (CAN) | Front fog lamp | FRONT FOG LAMP CIRCUIT (with xenon headlamps) FRONT FOG LAMP CIRCUIT (with halogen headlamps) | ||
| Tail lamp relay | Position light request signal | BCM (CAN) |
|
PARKING, LICENSE PLATE AND TAIL LAMPS SYSTEM (with xenon headlamps) PARKING, LICENSE PLATE AND TAIL LAMPS SYSTEM (with halogen headlamps) | ||
|
Front wiper request signal | BCM (CAN) | Front wiper | FRONT WIPER MOTOR LO CIRCUIT | ||
| Front wiper auto stop signal | Front wiper motor | |||||
|
Starter control relay signal | BCM (CAN) | Starter motor | STARTING SYSTEM | ||
| Starter relay control signal | TCM | |||||
| Steering lock relay | Steering lock relay signal | BCM (CAN) | Electronic steering column lock | FUNCTION DIAGNOSIS | ||
| Electronic steering column lock condition signal | Electronic steering column lock | |||||
| CVT device (park position switch) signal | CVT device (park position switch) signal | |||||
| A/C relay | A/C compressor request signal | ECM (CAN) | A/C compressor (magnet clutch) | MAGNET CLUTCH (with color display) or MAGNET CLUTCH (with monochrome display) | ||
| Ignition relay - 1 | Ignition switch ON signal | BCM (CAN) | Ignition relay - 1 | FUNCTION DIAGNOSIS | ||
| Vehicle speed signal | Combination meter (CAN) | |||||
| Push-button ignition switch | Push-button ignition switch | |||||
| Fuel pump relay | Fuel pump request signal | ECM | Fuel pump | FUEL PUMP | ||
| ECM relay | ECM relay control signal | ECM | ECM relay | POWER SUPPLY AND GROUND CIRCUIT | ||
| Throttle control motor relay | Throttle control motor relay signal | ECM | Throttle control motor relay | P2100, P2103 THROTTLE CONTROL MOTOR RELAY | ||
| Cooling fan relay - 1 | Cooling fan request signal | ECM (CAN) | Cooling fan relay 1 | COOLING FAN | ||
|
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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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