Hyundai Ioniq (AE): ESP(Electronic Stability Program) System / Troubleshooting
| 1. | In principle, ESP and TCS controls are prohibited in case of ABS failure. |
| 2. | When ESP or TCS fails, only the failed system control is prohibited. |
| 3. | However, when the solenoid valve relay should be turned off in case of ESP failure, refer to the ABS fail-safe. |
| 4. | Information on ABS fail-safe is identical to the fail-safe in systems where ESP 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 ESP 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). |
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| 5. | Though, it keeps on checkup even if the brake lamp switch is on. |
| 6. | When performing ABS or ESP 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. |
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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/ESP functions until normal operating condition is restored. |
Warning Lamp ON
| 1. | ABS warning lamp turns on when ABS is malfunctioning. |
| 2. | ESP function/ warning lamp turns on when ESP is malfunctioning. |
When power voltage and valve relay voltage are abnormal, input/output related failure judgment is not made.
Description of ESPOptimum driving safety now has a name : ESP, the Electronic Stability Program.ESP recognizes critical driving conditions, such as panic reactions in dangerous situations, and stabilizes the vehicle by wheel-individual braking and engine control intervention with no needfor actuating the brake or the gas pedal.
Components1. Front wheel speed sensor2. Front wheel speed sensor cable
Other information:
Inspection1.Check the resistance of the ambient temperature sensor between terminals 1 and 2 whether it changes by changing the ambient temperature.1. Ambient Sensor (+)2. Sensor groundSpecification Ambient temperature [°C (°F)] Resistance between terminal 1 and 2 (
Inspection1.Turn the ignition switch OFF.2.Disconnect the temperature control actuator connector.3.Verify that the temperature control actuator operates to the cool position when connecting 12V to terminal 3 and grounding terminal 7.Verify that the temperature control actuator operates to the warm position when connected in reverse.
