3.
Has a problem been found?
▶ Repair as necessary and then go to "Verification Of Vehicle Repair" procedure.
▶ Go to "Component Inspection" procedure.
The ESP is a system to stabilize a car during understeer and oversteer events by supplying appropriate wheel with braking pressure according to signal of yaw ＆ G sensor, SAS, WSS, pressure sensor.
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 lamp is turned ON and the EBD warning lamp is turned OFF.
Item | Detecting Condition | Possible cause |
DTC Strategy | ● Signal monitoring | ● Faulty HECU |
Monitoring Period | ● Continuous | |
Enable Conditions | ● If the controller requests pressure-hold or pressure-decrease for longer than 1.28s, a fault is stored. ● Under normal conditon, the inlet valves of all four wheels are not closed during control for longer than 1.28s. | |
Fail Safe | ● The ABS/ESP functions are inhibited, allow the EBD control. ● The ABS/ESP warning lamps are activated. |
Many malfunctions in the electrical system are caused by poor harness(es) and terminal condition. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
Has a problem been found?
▶ Repair as necessary and then go to "Verification Of Vehicle Repair" procedure.
▶ Go to "Component Inspection" procedure.
Ignition "OFF".
Ignition "ON" ＆ Engine "OFF".
Connect scantool and select "Diagnostic Trouble Codes (DTCs)" mode.
Using a scantool, Clear DTC.
Select "Diagnostic Trouble Codes (DTCs)" mode again.
Are any DTCs present ?
▶ Substitute with a known-good HECU and check for proper operation. If problem is corrected, replace HECU and then go to "Verification Of Vehicle Repair" procedure.
▶ Fault is intermittent caused by faulty HECU or was repaired and HECU memory was not cleared. go to "Verification Of Vehicle Repair" procedure.
After a repair, it is essential to verify that the fault has been corrected.
Connect scantool and select "Diagnostic Trouble Codes (DTCs)" mode
Using a scantool, Clear DTC.
Operate the vehicle within DTC Detecting Condition in General Information
Are any DTCs present?
▶ Go to the applicable troubleshooting procedure.
▶ System performing to specification at this time.
