P0523
DTC P0523: EOP Sensor Circuit High VoltageNOTE: Before you troubleshoot, record all freeze date and any on-board snapshot, and review the general troubleshooting information.
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 step 3.
NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the EOP sensor and the PCM.
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.
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 step 8.
NO - Go to step 19.
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 step 15.
NO - Go to step 10.
10. Turn the ignition switch OFF.
11. Jump the SCS line with the HDS.
12. Disconnect PCM connector C (22P).
13. Connect EOP sensor 3P connector terminal No. 3 to body ground with a jumper wire.
14. Check for continuity between PCM connector terminals C12 and body ground.
Is there continuity?
YES - Go to step 27.
NO - Repair open in the wire between the PCM (C12) and the EOP sensor, then go to step 21.
15. Turn the ignition switch OFF.
16. Connect PCM connector terminals A13 and C12 with a jumper wire.
17. Turn the ignition switch ON (II).
18. Check the OIL PRESSURE SENSOR in the DATA LIST with the HDS.
Is there about 4.79 V or more?
YES - Go to step 27.
NO - Repair open in the wire between the PCM (A13) and the EOP sensor, then go to step 21.
19. Turn the ignition switch OFF.
20. Replace the EOP sensor.
21. Reconnect all connectors.
22. Turn the ignition switch ON (II).
23. Reset the PCM with the HDS.
24. Do the PCM idle learn procedure. Programming and Relearning
25. 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 PCM, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO - Go to step 26.
26. Monitor the OBD STATUS for DTC P0523 in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES - Troubleshooting is complete.
NO - If the screen indicates FAILED, check for poor connections or loose terminals at the EOP sensor and the PCM, then go to step 1. If the screen indicates NOT COMPLETED, go to step 24 and recheck.
27. Update the PCM if it does not have the latest software, or substitute a known-good PCM.
28. 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 PCM, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM.