Hyundai Elantra: ESC(Electronic Stability Control) System / Troubleshooting

Failure Diagnosis
1.
In principle, ESC and TCS controls are prohibited in case of ABS failure.
2.
When ESC or TCS fails, only the failed system control is prohibited.
3.
However, when the solenoid valve relay should be turned off in case of ESC failure, refer to the ABS fail-safe.
4.
Information on ABS fail-safe is identical to the fail-safe in systems where ESC is not installed.
Memory of Fail Code
1.
It keeps the code as far as the backup lamp power is connected. (O)
2.
It keeps the code as long as the HCU power is on. (X)
Failure Checkup
1.
Initial checkup is performed immediately after the HECU power on.
2.
Valve relay checkup is performed immediately after the IG2 ON.
3.
It executes the checkup all the time while the IG2 power is on.
4.
Initial checkup is made in the following cases.
(1)
When no failure is detected
(2)
When ABS and ESC are not in control.
(3)
Initial checkup is not made after ECU power on.
(4)
If the vehicle speed is over 5 mph(8 km/h) when the brake lamp switch is off.
(5)
When the vehicle speed is over 24.8 mph(40 km/h).
5.
Though, it keeps on checkup even if the brake lamp switch is on.
6.
When performing ABS or ESC control before the initial checkup, stop the initial checkup and wait for the HECU power input again.
7.
Judge failure in the following cases.
(1)
When the power is normal.
(2)
From the point in which the vehicle speed reaches 4.9 mph(8 km/h) after HECU power on.
Countermeasures In Fail
1.
Shut the system down and perform the following actions and wait for HECU power OFF.
2.
Turn the valve relay off.
3.
Do not perform any ABS/TCS/ESC functions until normal operating condition is restored.
Warning Lamp On
1.
ABS warning lamp turns on when ABS is malfunctioning.
2.
ESC function/ warning lamp turns on when ESC is malfunctioning.
When power voltage and valve relay voltage are abnormal, input/output related failure judgment is not made.
Repair procedures
Inspection ESC System Bleeding This procedure should be followed to ensure adequate bleeding of air and filling of the ESC unit, brake lines and master cylinder with brake fluid. 1. Remove t ...

ESC Control Unit Components and Components Location
Components 1. Front - right tube2. Rear - left tube3. Rear - right tube4. Front - left tube5. MC SEC 6. MC PRI7. ESC control module(HECU)8. Bracket ...

Other information:

Hyundai Elantra AD (2016-2020) Owners Manual: Light Bulbs
Consult an authorized HYUNDAI dealer to replace most vehicle light bulbs. It is difficult to replace vehicle light bulbs because other parts of the vehicle must be removed before you can get to the bulb. This is especially true for removing the headlamp assembly to get to the bulb(s). Removin ...

Hyundai Elantra AD (2016-2020) Owners Manual: Automatic reverse
If a window senses any obstacle while it is closing automatically, it will stop and lower approximately 12 inches (30 cm) to allow the object to be cleared. If the window detects the resistance while the power window switch is pulled up continuously, the window will stop upward movement then ...

© 2018-2021 www.helantraad.com