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.
Protection Function (4WAS Front Control Unit)
4WAS system enters in the protection function mode (4WAS system is temporarily stopped) if 4WAS system continues the heavy load condition and the overheat condition. 4WAS system reactivates automatically if the heavy load condition and the overheat condition are resolved. 4WAS warning lamp continues turning OFF in the protection function mode.
| DTC | Error area and root cause | Contents of protection function |
|---|---|---|
| - | 4WAS front control unit power supply temporary malfunctioning condition | 4WAS system is temporarily stopped. |
| - | 4WAS front control unit overheat condition | |
| - | 4WAS front actuator overheat condition | |
| - | 4WAS front control unit heavy load condition |
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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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