ESP Warning Light Comes ON Steady

ESP(R) Warning Light Comes ON Steady

Wiring Diagram

Refer to "Wiring Diagram" under ESP Warning Light Does Not Come ON at Ignition Switch ON ESP(R) Warning Light Does Not Come ON at Ignition Switch ON.

Circuit Description

Refer to "Circuit Description" under ESP Warning Light Does Not Come ON at Ignition Switch ON ESP(R) Warning Light Does Not Come ON at Ignition Switch ON.

Troubleshooting

1. DTC check

Perform diagnostic trouble code check.

Is there any DTC(s)?
YES -
Go to (ESP) Check Electronic Stability Program Check.
NO -
Go to Step 2.

2. ESP(R) hydraulic unit / control module assembly power supply and ground circuit check

Check that ESP(R) 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 ESP(R) Hydraulic Unit / Control Module Assembly Power Supply and Ground Circuit Check.

Are check results OK?
YES -
Go to Step 3.
NO -
Repair ESP(R) 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?
YES -
Substitute a known-good combination meter and recheck. If warning light remains ON, substitute a known-good ESP(R) hydraulic unit / control module assembly and recheck.
NO -
Repair circuit and recheck.