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.
Body Control System
Before performing diagnosis, check the following items which might affect body control system problems.
- Check the battery. Ref. to STARTING/CHARGING SYSTEMS (H4DOTC)>BATTERY>INSPECTION
- Check the fuse condition. Ref. to BODY CONTROL/COMMUNICATION SYSTEM>RELAY AND FUSE>INSPECTION
Make sure that ampere of the fuse is setting value, and it is not blown out.
- Check the connecting condition of harness and harness connector.
- Confirm settings of body integrated unit are corresponded to vehicle equipment. Ref. to BODY CONTROL (DIAGNOSTICS)>REGISTRATION BODY INTEGRATED UNIT
- Make sure that the customizing of the body integrated unit matches the vehicle equipment. Ref. to BODY CONTROL (DIAGNOSTICS)>CUSTOMIZE
- Confirm [Factory initial setting] of body integrated unit registrations is [Market].
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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