Safety Concept (ESP)

SAFETY CONCEPT (ESP)





When any failures are occurred in the ESP system, the ESP ECU turns on the warning lamps and inhibits the control corresponding that as follows.

HI-SCAN (PRO) CHECK
1. Turn the ignition OFF.
2. Connect the Hi-Scan(pro) to the Data Link connector located underneath the lower crash pad panel.
3. Turn the ignition ON.
4. Use the Hi-Scan (Pro) to check for diagnosis trouble codes.
5. After completion of the repair or correction of the problem, erase the stored fault codes using the clear key on the Hi-Scan (Pro).





6. Disconnect the Hi-Scan (Pro).

FAILURE DIAGNOSIS
GENERAL
1. In principle, ESP and TCS controls are prohibited in case of ABS failure.
2. When ESP or TCS is fail, only the failed system control is prohibited.
3. However, when the solenoid valve relay should be turned off in case of ESP fail, refer to the ABS fail-safe.
4. Information on ABS fail-safe is identical with the fail-safe in which 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 far 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 the failure is not detected now
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 4.9 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 ESP control before the initial checkup, stop the initial checkup and wait for the HECU power input again.
7. Judge fail 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. Turn the system down and perform the following actions and wait for HECU power OFF.
2. Turn the valve relay off.
3. Stop the control during the operation and do not execute any until the normal condition recovers.

WARNING LAMP ON
1. ABS warning lamp turns on when ABS is fail.
2. TCS warning lamp turns on when TCS is fail.
3. ESP operation lamp turns on and TCS OFF warning lamp blinks when ESP is fail.
When power voltage and valve relay voltage are abnormal, input/output related failure judgment is not made.