ESP® Warning Light Comes ON Steady: Troubleshooting

ESP® WARNING LIGHT SYMPTOM TROUBLESHOOTING REFERENCE CHART

Step	Action	YES	NO
1	DTC check Perform diagnostic trouble code check. Is there any DTC(s)?	Go to ELECTRONIC STABILITY PROGRAM CHECK .	Go to Step 2.
2	ESP® hydraulic unit/control module assembly power supply and ground circuit check Check that ESP® hydraulic unit/control module assembly power supply circuit and ground circuit is in good condition referring to ESP® HYDRAULIC UNIT/CONTROL MODULE ASSEMBLY POWER SUPPLY AND GROUND CIRCUIT CHECK . Are check results OK?	Go to Step 3.	Repair ESP® hydraulic unit/control module assembly power supply or ground circuit.
3	CAN communication line circuit check Turn ignition switch to OFF position. Disconnect connectors of all control modules communicating by means of CAN. Check for proper connection to CAN communication line wire. If OK then check CAN communication line circuit between control modules for open, short and high resistance. Is each CAN communication line circuit in good condition?	Substitute a known-good combination meter and recheck. If warning light remains ON, substitute a known-good ESP® hydraulic unit/control module assembly and recheck.	Repair circuit and recheck.