P1287
DTC P1287: Rocker Arm Oil Pressure Switch Circuit High VoltageNOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.
1. Turn the ignition switch OFF.
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 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 EOP sensor, and the PCM.
NO - Go to step 6.
6. Turn the ignition switch OFF.
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, 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 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 G101, then go to step 16.
NO - Go to step 12.
12. Turn the ignition switch OFF.
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 OFF.
17. Reconnect all connectors.
18. Turn the ignition switch ON (II).
19. Reset the PCM with the HDS.
20. Do the PCM idle learn procedure.
21. Do the VTEC TEST in the INSPECTION MENU with the HDS.
22. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P1287 is indicated, 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 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 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.
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 EOP 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 and recheck.
24. Update the PCM if it does not have the latest software, or substitute a known-good PCM.
25. Do the VTEC TEST in the INSPECTION MENU with the HDS.
26. Check for Temporary DTCs or 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 EOP sensor, and the PCM. If the PCM was updated, substitute a known-good PCM, then go to step 26. If the PCM was substituted, go to step 1.
NO - If no Temporary DTCs or DTCs are indicated, go to step 27. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
27. 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.
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 EOP sensor, and the PCM. If the PCM was updated, substitute a known-good PCM, then go to step 25. 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 25 and recheck.