| DTC P0563: | ECM Power Source Circuit Unexpected Voltage |
| 1. | Turn the ignition switch ON (II). |
| 2. | Clear the DTC with the HDS. |
| 3. | Turn the ignition switch OFF. |
| 4. | Wait 10 seconds. |
| 5. | Turn the ignition switch ON (II). |
| 6. | Check for Temporary DTCs or DTCs with the HDS. Is DTC P0563 indicated? YES - Go to 7. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the under-hood fuse/relay box and the ECM.n |
| 7. | Turn the ignition switch OFF. |
| 8. | Remove the battery. |
| 9. | Disconnect ECM connector A (44P). |
| 10. | Connect a battery. |
| 11. | Measure voltage between ECM connector terminal A6 and body ground.
Is there battery voltage? YES - Go to 15. NO - Go to 12. |
| 12. | Disconnect a battery. |
| 13. | Disconnect the under-hood fuse/relay box 20P (white) connector. |
| 14. | Check for continuity between ECM connector terminal A6 and body ground.
Is there continuity? YES - Repair short in the wire between the ECM (A6) and the under-hood fuse/relay box, then go to 20. NO - Go to 19. |
| 15. | Disconnect a battery. |
| 16. | Disconnect the under-hood fuse/relay box 20P (white) connector. |
| 17. | Connect a battery. |
| 18. | Measure voltage between ECM connector terminal A8 and body ground.
Is there battery voltage? YES - Repair short to power in the wire between the ECM (A8) and the under-hood fuse/relay box, then go to 20. NO - Go to 19. |
| 19. | Test PGM-FI main relay 1. Is PGM-FI main relay 1 OK? YES - Go to 27. NO - Replace the under-hood fuse/relay box, then go to 20. |
| 20. | Reconnect all connectors and a battery. |
| 21. | Turn the ignition switch ON (II). |
| 22. | Reset the ECM with the HDS. |
| 23. | Do the ECM idle learn procedure. |
| 24. | Turn the ignition switch OFF. |
| 25. | Wait 10 seconds. |
| 26. | Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0563 is indicated, check for poor connections or loose terminals at the under-hood fuse/relay box and the ECM, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting. NO - Troubleshooting is complete.n |
| 27. | Update the ECM if it does not have the latest software, or substitute a known-good ECM. |
| 28. | Do the ECM idle learn procedure. |
| 29. | Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0563 is indicated, check for poor connections or loose terminals at the under-hood fuse/relay box and the ECM, then go to 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting. NO - If the ECM was updated, troubleshooting is complete. If the ECM was substituted, replace the original ECM.n |