ESP Warning Light Does Not Come ON at Ignition Switch ON

ESP(R) Warning Light Does Not Come ON at Ignition Switch ON

Wiring Diagram










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. Turn ignition switch to ON position.

Do other warning lights come ON?
YES -
Go to Step 2.
NO -
Go to Step 3.

2. Connect scan tool to DLC with ignition switch turned OFF.
Turn ignition switch to ON position and check DTC.

Is there DTC U0073?
YES -
Go to CAN DTC (Lost Communication and Communication Bus Off) Table CAN DTC (Lost Communication and Communication Bus Off) Table.
NO -
Substitute a known-good combination meter and recheck. If ESP(R) warning light remains OFF, substitute a known-good ESP(R) hydraulic unit / control module assembly and recheck.

3.
Is Circuit fuse for combination meter in good condition?
YES -
Go to Step 4.
NO -
Replace fuse and check for short circuit to ground.

4. 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 -
Go to Step 5.
NO -
Repair or replace.

5. Remove combination meter with ignition switch turned OFF.
Check for proper connection to "PPL/RED" and "BLK" wire of combination meter connector.
If OK, turn ON ignition switch and measure voltage at "PPL/RED" wire of combination meter connector and vehicle body ground.

Is it 10 - 14 V?
YES -
Go to Step 6.
NO -
Repair power supply circuit for combination meter.

6. Measure resistance between "BLK" wire of combination meter connector and vehicle body ground.

Is resistance less than 2 ohms?
YES -
Replace combination meter.
NO -
"BLK" circuit open or high resistance.