Hyundai Elantra AD Quiz
Brake System

Troubleshooting

In this manual: Brake System
General Information — 9Engine Mechanical System — 84Engine Electrical System — 60Emission Control System — 24Engine Control System/Fuel System — 90Automatic Transmission — 92Drive Shaft and Axle — 20Suspension System — 31Steering — 20Restraints — 50Brake System — 63Body (Interior and Exterior) — 214Body Electrical System — 221Heating, Ventilation, and Air Conditioning — 71
18steps
~108min
4/5difficulty
Done 0 of 18

Fault Diagnosis

  1. In principle, ESC and TCS control is prohibited when the ABS has failed.
  2. When an ESC or TCS failure occurs, only the failed system control is prohibited.
  3. However, when the solenoid valve relay must be turned off due to an ESC failure, refer to the ABS fail-safe.
  4. ABS fail-safe information is identical to the fail-safe for systems without ESC.
  5. It stores the code as long as backup lamp power is connected. (O)
  6. It stores the code as long as HCU power is on. (X)
  7. The initial check is performed immediately after the HECU is powered on.
  8. The valve relay check is performed immediately after IG2 is turned on.
  9. It performs the check at all times while IG2 power is on.
  10. The initial check is performed in the following cases.
    1. When no fault is detected.
    2. When ABS and ESC are not being controlled.
    3. The initial check is not performed after the ECU is powered on.
    4. If the vehicle speed exceeds 8 km/h with the stop lamp switch off.
    5. When the vehicle speed exceeds 24.8 mph (40 km/h).
  11. However, the check continues even when the stop lamp switch is on.
  12. If ABS or ESC control is performed before the initial check, stop the initial check and wait for the HECU power to be turned on again.
  13. The judgment fails in the following cases.
    1. When the power supply is normal.
    2. From the moment the vehicle speed reaches 8 km/h after the HECU is powered on.
  14. Turn off the system, perform the following steps, and wait for the HECU power to turn off.
  15. Turn off the valve relay.
  16. Do not perform any ABS/TCS/ESC functions until normal operating condition is restored.
  17. The ABS warning lamp illuminates when an ABS malfunction occurs.
  18. The ESC/warning lamp illuminates when the ESC is malfunctioning.
Fail Code Memory, Fault Check, Countermeasures in Case of Failure, Warning Lamp ON. When the power supply voltage and the valve relay voltage are not normal, input/output-related fault diagnosis is not performed.

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