ESP® Warning Light Does Not Come ON after Setting Ignition “ON”
Precautions: Precautions for ESP® · Precautions for Diagnosing Trouble · Test with Speedometer Tester or Other Equipment · Precautions for Brakes · General safety (00)
Circuit Diagram
| [A]: | ESP® hydraulic unit / control module assembly connector (View: [a]) | 8. | Combination meter | 18. | ESP® hydraulic unit / control module assembly |
| [B]: | Ignition switch model | 9. | ESP® OFF light | 19. | Other control modules (if equipped) |
| [C]: | Keyless push start model | 10. | ESP® warning light | 20. | To other control modules by CAN |
| 1. | Battery | 11. | ABS warning light | 21. | “ABS” fuse (25A) |
| 2. | Relay box | 12. | EBD warning light (brake warning light) | 22. | “ABS2” fuse |
| 3. | Ignition switch | 13. | CPU (combination meter) | 23. | “IGN” fuse |
| 4. | J/B | 14. | BCM | 24. | “ABS” fuse (10A) |
| 5. | IG1 relay | 15. | DLC | 25. | “MTR” fuse |
| 6. | Steering angle sensor | 16. | Brake fluid level switch | ||
| 7. | CAN driver | 17. | Parking brake switch |
Circuit Description
Operation (ON/OFF) of ESP® warning light is controlled by ESP® control module through light driver module in combination meter.
If ESP® system is in good condition, ESP® control module turns ON ESP® warning light with ignition “ON”, keeps the light ON for 2 seconds and then turns it OFF. If any abnormality in the system is detected, ESP® warning light is turned ON continuously by ESP® control module. Also, the light is turned ON continuously by light driver module when the connector of ESP® control module connector is disconnected.
Troubleshooting
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
Warning light check
1)Set ignition “ON”.
Do other indicator lights light up?
|
Go to Step 2.
|
Go to Step 4.
|
| 2 |
DTC check
1)Check that ignition is “OFF”.
2)Connect scan tool to DLC.
3)Set ignition “ON”.
4)Check DTC.
Is DTC U0073 detected?
|
•M16A model: Go to Troubleshooting for Communication Bus Off:M16A Model.
•K14C model: Go to Troubleshooting for Communication Bus Off:K14C Model. •D16AA model: Go to Troubleshooting for Communication Bus Off:D16AA Model. |
Go to Step 3.
|
| 3 |
Combination meter check
1)Replace combination meter.
2)Set ignition “ON”.
Does ESP® warning light stay OFF?
|
Replace ESP® hydraulic unit / control module assembly and recheck warning light operation.
|
End.
|
| 4 |
Fuse check
Is “MTR” fuse in good condition?
|
Go to Step 5.
|
Replace “MTR” fuse and check for short circuit to ground.
|
| 5 |
CAN communication circuit check
1)Check CAN communication circuit between ESP® control module and combination meter.
Is circuit in good condition?
|
Go to Step 6.
|
Repair or replace defective wire harness.
|
| 6 |
Combination meter power supply circuit check
1)Remove combination meter.
2)Check for proper connection to “G240” connector.
3)If check result is OK, set ignition “ON”.
4)Measure voltage between “G240-3” terminal and ground.
Is it 10 – 14 V?
|
Go to Step 7.
|
Repair “A1” circuit.
|
| 7 |
Combination meter ground circuit check
1)Set ignition “OFF”.
2)Measure resistance between “G240-5” terminal and ground.
Is it 1 Ω or less?
|
Replace combination meter and recheck warning light operation.
|
Repair “A2” circuit.
|