| DTC P0563: | ECM/PCM 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 PGM-FI main relay 1 (C) and the ECM/ PCM.n |
| 7. | Turn the ignition switch OFF. |
| 8. | Jump the SCS line with the HDS. |
| 9. | Disconnect ECM/PCM connector A (44P). |
| 10. | Measure voltage between ECM/PCM connector terminal A6 and body ground.
Is there battery voltage? YES - Go to 13. NO - Go to 11. |
| 11. | Remove PGM-FI main relay 1 (C) (A) from the under-hood fuse/relay box.
|
| 12. | Check for continuity between ECM/PCM connector terminal A6 and body ground.
Is there continuity? YES - Repair short in the wire between the ECM/PCM (A6) and PGM-FI main relay 1 (C), then go to 16. NO - Go to 15. |
| 13. | Remove PGM-FI main relay 1 (C) (A) from the under-hood fuse/relay box.
|
| 14. | Measure voltage between ECM/PCM connector terminal A8 and body ground.
Is there battery voltage? YES - Repair short to power in the wire between the ECM/PCM (A8) and PGM-FI main relay 1 (C), then go to 16. NO - Go to 15. |
| 15. | Test PGM-FI main relay 1 (C). Is PGM-FI main relay 1 (C) OK? YES - Go to 23. NO - Replace PGM-FI main relay 1 (C), then go to 16. |
| 16. | Reconnect all connectors. |
| 17. | Turn the ignition switch ON (II). |
| 18. | Reset the ECM/PCM with the HDS. |
| 19. | Do the ECM/PCM idle learn procedure. |
| 20. | Turn the ignition switch OFF. |
| 21. | Wait 10 seconds. |
| 22. | 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 PGM-FI main relay 1 (C) and the ECM/PCM, then go to 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting. NO - Troubleshooting is complete.n |
| 23. | Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM. |
| 24. | 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 PGM-FI main relay 1 (C) and the ECM/PCM, then go to 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting. NO - If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM.n |