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.
Basic Inspection
Before performing diagnosis, check the following items which might affect the problem of Driver Monitoring System.
- Check the battery. Refer to STARTING/CHARGING SYSTEMS (H4DOTC)>Battery>INSPECTION . Refer to STARTING/CHARGING SYSTEMS (H4DO)>Battery>INSPECTION .
- Check the main and other fuses, and harnesses. Also check for proper grounding.
- Check whether the infrared LED illuminates/goes off according to ON/OFF of Driver Monitoring System OFF Switch in the center information display.
- When Driver Monitoring Unit is soiled with any dirt or fingerprint, wipe off with soft cloth or cloth wrung out of water.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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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