The ESP is a system to stabilize a car in an emergency (kine of under steering or over steering) by supplying appropriate wheel with braking pressure according to signal of yaw&G sensor, SAS, WSS, pressure sensor. ESP system help to escape from facing in an accident.
Under normal conditions, the inlet valves of all four wheels are not closed during control for longer than 1,28s or If the controller requests pressure-hold or pressure-decrease for longer than 1,28s, a fault is detected. The ABS/ESP warning ramp is turned ON and the EBD warning ramp is turned OFF.
Item | Detecting Condition | Possible cause | |
DTC Strategy |
•
Signal monitoring |
•
Faulty HECU | |
Case1 | Monitoring Period |
•
Continuous | |
Enable Conditions |
•
If the controller requests pressure-hold or pressure-decrease for longer than 1,28s, a fault is stored. | ||
Case2 | Monitoring Period |
•
Continuous (at vehicle reference speed > 6m/s, no detected under voltage and a fault is not already detected) | |
Enable Conditions |
•
The monitoring reports a failure if continuous ESP control occurs for a time period >= 10 s. | ||
Fail Safe |
•
The ABS/ESP functions are inhibited, allow the EBD control.
•
The ABS/ESP warning lamps are activated. | ||
