DTC Troubleshooting
DTC Troubleshooting: P1287
DTC P1287:
Rocker Arm Oil Pressure Switch Circuit High Voltage
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information Initial Inspection and Diagnostic Overview.
1. Turn the ignition switch to LOCK (0).
2. Check the engine oil level.
Is the level OK?
YES -
Go to step 3.
NO -
Adjust the engine oil to the proper level, then go to step 18.
3. Turn the ignition switch to ON (II).
4. Clear the DTC with the HDS.
5. Do the VTEC TEST in the INSPECTION MENU with the HDS.
Is the result OK?
YES -
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at rocker arm oil control solenoid 1, rocker arm oil control solenoid 2, the rocker arm oil pressure switch, the rocker arm oil pressure sensor, and the PCM.�
NO -
Go to step 6.
6. Turn the ignition switch to LOCK (0).
7. Disconnect the rocker arm oil pressure switch 2P connector.
8. At the rocker arm oil pressure switch side, check for continuity between rocker arm oil pressure switch 2P connector terminals No. 1 and No. 2.
Is there continuity?
YES -
Go to step 9.
NO -
Replace the rocker arm oil pressure switch Service and Repair, then go to step 16.
9. Connect rocker arm oil pressure switch 2P connector terminal No. 2 to body ground with a jumper wire.
10. Turn the ignition switch to ON (II).
11. Check the ROCKER ARM OIL PRESSURE SWITCH in the DATA LIST with the HDS.
Does it indicate ON?
YES -
Repair open in the wire between the rocker arm oil pressure switch and G102 Connector and Harness Locations, then go to step 16.
NO -
Go to step 12.
12. Turn the ignition switch to LOCK (0).
13. Jump the SCS line with the HDS.
14. Disconnect PCM connector C (44P).
15. Check for continuity between rocker arm oil pressure switch 2P connector terminal No. 2 and PCM connector terminal C33.
Is there continuity?
YES -
Go to step 24.
NO -
Repair open in the wire between the PCM(C33) and the rocker arm oil pressure switch, then go to step 16.
16. Turn the ignition switch to LOCK (0).
17. Reconnect all connectors.
18. Turn the ignition switch to ON (II).
19. Reset the PCM with the HDS.
20. Do the PCM idle learn procedure PCM Idle Learn Procedure.
21. Do the VTEC TEST in the INSPECTION MENU with the HDS.
22. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P1287 indicated?
YES -
Check for poor connections or loose terminals at rocker arm oil control solenoid 1, rocker arm oil control solenoid 2, the rocker arm oil pressure switch, the rocker arm oil pressure sensor, and the PCM, then go to step 1.
NO -
Go to step 23.
23. Monitor the OBD STATUS for DTC P1287 in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES -
Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated in step 22, go to the indicated DTC's troubleshooting.�
NO -
If the screen indicates FAILED, check for poor connections or loose terminals at rocker arm oil control solenoid 1, rocker arm oil control solenoid 2, the rocker arm oil pressure switch, the rocker arm oil pressure sensor, and the PCM, then go to step 1. If the screen indicates EXECUTING, keep testing until a result comes on. If the screen indicates OUT OF CONDITION, go to step 21.
24. Reconnect all connectors.
25. Update the PCM if it does not have the latest software PCM Update, or substitute a known-good PCM Initial Inspection and Diagnostic Overview.
26. Do the VTEC TEST in the INSPECTION MENU with the HDS.
27. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P1287 indicated?
YES -
Check for poor connections or loose terminals at rocker arm oil control solenoid 1, rocker arm oil control solenoid 2, the rocker arm oil pressure switch, the rocker arm oil pressure sensor, and the PCM. If the PCM was updated, substitute a known-good PCM Initial Inspection and Diagnostic Overview, then go to step 26. If the PCM was substituted, go to step 1.
NO -
Go to step 28.
28. Monitor the OBD STATUS for DTC P1287 in the DTCs MENU with the HDS.
Does the screen 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 27, go to the indicated DTC's troubleshooting.�
NO -
If the screen indicates FAILED, check for poor connections or loose terminals at rocker arm oil control solenoid 1, rocker arm oil control solenoid 2, the rocker arm oil pressure switch, the rocker arm oil pressure sensor, and the PCM. If the PCM was updated, substitute a known-good PCM Initial Inspection and Diagnostic Overview, then go to step 26. If the PCM was substituted, go to step 1. If the screen indicates EXECUTING, keep testing until a result comes on. If the screen indicates OUT OF CONDITION, go to step 26.