ESP(Electronic Stability Program) System

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 MALFUNCTION 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 self-diagnosis is performed at key ON. (Additional initial diagnoticsare performed when the vehicle exceeds 5 mph (8 km/h) with the brake switchOFF, and when the vehicle exceeds 24.9 mph (40 km/h). The motor and valvesmay activate during these initial diagnostic routines.)
2. Normal system self-diagnosis is performed as long as the ignition key remainON.

FAIL-SAFE
1. Turn the system down and perform the following actions and wait for HECU power OFF.
2. Turn the valve relay off.
3. Inhibit operations for the malfunctioning system ; once the system is restoredto normal operation, operations will resume.

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

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 MALFUNCTION 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 self-diagnosis is performed at key ON. (Additional initial diagnoticsare performed when the vehicle exceeds 5 mph (8 km/h) with the brake switchOFF, and when the vehicle exceeds 24.9 mph (40 km/h). The motor and valvesmay activate during these initial diagnostic routines.)
2. Normal system self-diagnosis is performed as long as the ignition key remainON.

FAIL-SAFE
1. Turn the system down and perform the following actions and wait for HECU power OFF.
2. Turn the valve relay off.
3. Inhibit operations for the malfunctioning system ; once the system is restoredto normal operation, operations will resume.

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