DTC Troubleshooting
DTC Troubleshooting: P0523
DTC P0523:
Rocker Arm Oil Pressure Sensor A High Voltage
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.
1. Turn the ignition switch to ON (II).
2. Check ROCKER ARM OIL PRESSURE SENSOR A in the DATA LIST with the HDS.
Is there about 4.79 V or more?
YES -
Go to step 3.
NO -
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at rocker arm oil pressure sensor A and the PCM.�
3. Turn the ignition switch to LOCK (0).
4. Disconnect the rocker arm oil pressure sensor A 3P connector.
5. Connect rocker arm oil pressure sensor A 3P connector terminals No. 2 and No. 3 with a jumper wire.
6. Turn the ignition switch to ON (II).
7. Check ROCKER ARM OIL PRESSURE SENSOR A in the DATA LIST with the HDS.
Is there about 4.79 V or more?
YES -
Go to step 8.
NO -
Go to step 18.
8. Remove the jumper wire.
9. Measure the voltage between rocker arm oil pressure sensor A 3P connector terminals No. 1 and No. 3.
Is there about 5 V?
YES -
Go to step 14.
NO -
Go to step 10.
10. Turn the ignition switch to LOCK (0).
11. Jump the SCS line with the HDS.
12. Disconnect PCM connector B (44P).
13. Check for continuity between PCM connector terminal B41 and rocker arm oil pressure sensor A 3P connector terminal No. 3.
Is there continuity?
YES -
Go to step 26.
NO -
Repair an open in the wire between the PCM(B41) and rocker arm oil pressure sensor A, then go to step 20.
14. Turn the ignition switch to LOCK (0).
15. Jump the SCS line with the HDS.
16. Disconnect PCM connector C (44P).
17. Check for continuity between PCM connector terminal C33 and rocker arm oil pressure sensor A 3P connector terminal No. 2.
Is there continuity?
YES -
Go to step 26.
NO -
Repair an open in the wire between the PCM(C33) and rocker arm oil pressure sensor A, then go to step 20.
18. Turn the ignition switch to LOCK (0).
19. Replace rocker arm oil pressure sensor A Rocker Arm Oil Pressure Sensor A Removal/Installation.
20. Reconnect all connectors.
21. Turn the ignition switch to ON (II).
22. Reset the PCM with the HDS.
23. Do the PCM idle learn procedure PCM Idle Learn Procedure.
24. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P0523 indicated?
YES -
Check for poor connections or loose terminals at rocker arm oil pressure sensor A and the PCM, then go to step 1.
NO -
Go to step 25.
25. Monitor the OBD STATUS for DTC P0523 in the DTCs MENU with the HDS.
Does the HDS indicated PASSED?
YES -
Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated in step 24, go to the indicated DTC's troubleshooting.�
NO -
If the HDS indicates FAILED, check for poor connections or loose terminals at rocker arm oil pressure sensor A and the PCM, then go to step 1. If the HDS indicates NOT COMPLETED, keep idling until a result comes on.
26. Reconnect all connectors.
27. Update the PCM if it does not have the latest software PCM Update, or substitute a known-good PCM.
28. Start the engine, and let it idle.
29. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P0523 indicated?
YES -
Check for poor connections or loose terminals at rocker arm oil pressure sensor A and the PCM. If the PCM was updated, substitute a known-good PCM, then go to step 28. If the PCM was substituted, go to step 1.
NO -
Go to step 30.
30. Monitor the OBD STATUS for DTC P0523 in the DTCs MENU with the HDS.
Does the HDS indicate PASSED?
YES -
If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM Service and Repair. If any other Pending or Confirmed DTCs were indicated in step 29, go to the indicated DTC's troubleshooting.�
NO -
If the HDS indicates FAILED, check for poor connections or loose terminals at rocker arm oil pressure sensor A and the PCM. If the PCM was updated, substitute a known-good PCM, then go to step 28. If the PCM was substituted, go to step 1. If the HDS indicates NOT COMPLETED, keep idling until a result comes on.