Failure Checkup
- Initial checkup is performed immediately after the HECU is powered on.
- Valve relay checkup is performed immediately after switching "ON" the IG2.
- It executes the checkup all the time while the IG2 is switched "ON".
- Initial checkup is made in the following cases.
- When the failure is not detected momentarily
- When ABS and ESC are not in control.
- If initial checkup is not made after supplying power to ECU. Initial checkup is not made after ECU power on.
- If the vehicle speed is over 5 mph (8 km/h) with the brake lamp switched off.
- When the vehicle speed is over 24.8 mph (40 km/h).
- Check up continues even if the brake lamp is switched on.
- When performing ABS or ESC control before the initial checkup, stop the initial checkup and wait for the HECU power input again.
- Judge failure in the following cases.
- When the power is normal.
- From the point in which the vehicle speed reaches 4.9 mph (8 km/h) after HECU power on.