| DTC P0523: | EOP Sensor Circuit High Voltage |
| 1. | Turn the ignition switch ON (II). |
| 2. | Check the OIL PRESSURE SENSOR in the DATA LIST with the HDS. Is there about 4.79 V or more? YES - Go to 3. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the EOP sensor and the ECM/PCM.n |
| 3. | Turn the ignition switch OFF. |
| 4. | Disconnect the EOP sensor 3P connector. |
| 5. | Connect EOP sensor 3P connector terminals No. 2 and No. 3 with a jumper wire.
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| 6. | Turn the ignition switch ON (II). |
| 7. | Check the OIL PRESSURE SENSOR in the DATA LIST with the HDS. Is there about 4.79 V or more? YES - Go to 8. NO - Go to 18. |
| 8. | Remove the jumper wire. |
| 9. | Measure voltage between EOP sensor 3P connector terminals No. 1 and No. 3.
Is there about 5 V? YES - Go to 14. NO - Go to 10. |
| 10. | Turn the ignition switch OFF. |
| 11. | Jump the SCS line with the HDS. |
| 12. | Disconnect ECM/PCM connector C (44P). |
| 13. | Check for continuity between ECM/PCM connector terminal C14 and EOP sensor 3P connector terminal No. 3.
Is there continuity? YES - Go to 26. NO - Repair open in the wire between the ECM/PCM (C14) and the EOP sensor, then go to 20. |
| 14. | Turn the ignition switch OFF. |
| 15. | Jump the SCS line with the HDS. |
| 16. | Disconnect ECM/PCM connector C (44P). |
| 17. | Check for continuity between ECM/PCM connector terminal C22 and EOP sensor 3P connector terminal No. 2.
Is there continuity? YES - Go to 26. NO - Repair open in the wire between the ECM/PCM (C22) and the EOP sensor, then go to 20. |
| 18. | Turn the ignition switch OFF. |
| 19. | Replace the EOP sensor. |
| 20. | Reconnect all connectors. |
| 21. | Turn the ignition switch ON (II). |
| 22. | Reset the ECM/PCM with the HDS. |
| 23. | Do the ECM/PCM idle learn procedure. |
| 24. | Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0523 is indicated, check for poor connections or loose terminals at the EOP sensor and the ECM/PCM, then go to 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting. NO - Go to 25. |
| 25. | Monitor the OBD STATUS for DTC P0523 in the DTCs MENU with the HDS. Does the screen indicated PASSED? YES - Troubleshooting is complete.n NO - If the screen indicates FAILED, check for poor connections or loose terminals at the EOP sensor and the ECM/PCM, then go to 1. If the screen indicates NOT COMPLETED, go to 23 and recheck. |
| 26. | Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM. |
| 27. | Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0523 is indicated, check for poor connections or loose terminals at the EOP sensor and the ECM/PCM, then go to 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting. NO - If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM.n |