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.
Can Communication Line Control
With CAN communication, by connecting each control unit using two communication lines (CAN L-line, CAN H-line), it is possible to transmit a maximum amount of information with minimum wiring. Each control unit can transmit and receive data, and reads necessary information only.
- Fail-safe control
- When CAN communication with other control units is impossible, IPDM E/R performs fail-safe control. After CAN communication returns to normal operation, it also returns to normal control.
- Operation of control parts by IPDM E/R during fail-safe mode is as follows:
FAIL-SAFE MODEControlled system Fail-safe mode Headlamp - With the ignition switch ON, the headlamp (low) is ON.
- With the ignition switch OFF, the headlamp (low) is OFF.
Tail and parking lamps - With the ignition switch ON, the tail and parking lamps are ON.
- With the ignition switch OFF, the tail and parking lamps are OFF.
Cooling fan - With the ignition switch ON, the cooling fan HI operates.
- With the ignition switch OFF, the cooling fan stops.
Front wiper Until the ignition switch is turned off, the front wiper LO and HI remains in the same status it was in just before fail-safe control was initiated. Rear window defogger Rear window defogger relay OFF A/C compressor A/C compressor OFF Front fog lamps Front fog lamp relay OFF
Use the Manual With the Right Hardware
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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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