ESP Warning Light Comes ON Steady

ESP(R) Warning Light Comes ON Steady

Wiring Diagram

Refer to 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

Operation (ON/OFF) of ESP(R) warning light is controlled by ESP(R) control module through light driver module in combination meter.

If ESP(R) system is in good condition, ESP(R) control module turns ESP(R) warning light ON at the ignition switch ON, keeps it ON for 2 seconds and then turns it OFF. If an abnormality in the system is detected, ESP(R) warning light is turned ON continuously by ESP(R) control module. Also, it is turned ON continuously by light driver module when the connector of ESP(R) control module is disconnected.

Troubleshooting

1. Perform diagnostic trouble code check.

Is there any DTC(s)?
YES -
Go to applicable DTC diag. flow.
NO -
Go to Step 2.

2.
Are main fuses for pump motor and solenoid valves in good condition?
YES -
Go to Step 3.
NO -
Replace fuse and check circuit for short to ground.

3. Turn ignition switch to OFF.
Disconnect ESP(R) control module connector.
Check for proper connection to ESP(R) control module connector at terminals "E53-39", "E53-16" and "E53-47".
If OK then turn ignition switch to ON position and measure voltage between terminal "E53-35" and vehicle body ground.

Is it 10 - 14 V?
YES -
Go to Step 4.
NO -
"GRN/ORN" circuit open.

4. Turn ignition switch to OFF position.
Check for proper connection to ESP(R) control module connector at terminals "E53-1" and "E53-32".
If OK then turn ignition switch to ON position and measure voltage between each terminal of "E53-1", "E53-32" and vehicle body ground.

Are they 10 - 14 V?
YES -
Go to Step 5.
NO -
"WHT/RED" and/or "WHT/BLU" circuit open.

5. Turn ignition switch to OFF and measure resistance between each terminal of "E53-16", "E53-47" and vehicle body ground.

Is resistance less than 2 ohms?
YES -
Go to Step 6.
NO -
Ground circuit for ESP(R) control module open or high resistance.

6. Check CAN communication circuit between combination meter and ESP(R) control module. CAN DTC (Lost Communication and Communication Bus Off) Table

Is CAN communication circuit in good condition?
YES -
Substitute a known-good combination meter and recheck. If ABS warning light remains ON, substitute a known-good ESP(R) hydraulic unit / control module assembly and recheck.
NO -
Repair or replace.