| DTC P0563 (34-2): | ECM/PCM Power Source Circuit Unexpected Voltage |
| 1. | Reset the ECM/PCM. |
| 2. | Turn the ignition switch OFF. |
| 3. | Wait 5 seconds. |
| 4. | Turn the ignition switch ON (II). Is DTC P0563 indicated? YES - Go to 5. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose wires at the No. 20 (15A) fuse in the under-dash fuse/relay box and at the ECM/ PCM.n |
| 5. | Turn the ignition switch OFF. |
| 6. | Disconnect the negative cable from the battery. |
| 7. | Disconnect ECM/PCM connector E (31P). |
| 8. | Reconnect the negative cable from the battery. |
| 9. | Measure voltage between ECM/PCM connector terminal E7 and body ground.
Is there battery voltage? YES - Go to 13. NO - Go to 8. |
| 10. | Remove the driver's side under cover. |
| 11. | Remove the relay holder (A) from the under-dash fuse/relay box, and remove the PGM-FI main relay 1 (brown) (B) from the relay holder (A), after reinstall the relay holder (A) to the under-dash fuse/relay box.
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| 12. | Check for continuity between ECM/PCM connector terminal E7 and body ground.
Is there continuity? YES - Repair short in the wire between the ECM/PCM (E7) and the PGM-FI main relay 1.n NO - Replace the PGM-FI main relay 1.n |
| 13. | Disconnect the negative cable from the battery. |
| 14. | Reconnect ECM/PCM connector E (31P). |
| 15. | Reconnect the negative cable from the battery. |
| 16. | Measure voltage between ECM/PCM connector terminal E7 and body ground.
Is there battery voltage? YES - Go to 18. NO - Substitute a known-good ECM/PCM and recheck. If symptom/indication goes away, replace the original ECM/ PCM.n |
| 17. | Disconnect the negative cable from the battery. |
| 18. | Disconnect ECM/PCM connector A (31P). |
| 19. | Reconnect the negative cable from the battery. |
| 20. | Measure voltage between body ground and ECM/PCM connector terminals A3 and A2 individually.
Is there battery voltage? YES - Go to 21. NO - Substitute a known-good ECM/PCM and recheck. If symptom/indication goes away, replace the original ECM/ PCM.n |
| 21. | Remove the driver's side under cover. |
| 22. | Remove the relay holder (A) from the under-dash fuse/relay box, and remove the PGM-FI main relay 1 (brown) (B) from the relay holder (A), after reinstall the relay holder (A) to the under-dash fuse/relay box.
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| 23. | Measure voltage between body ground and ECM/PCM connector terminals A3 and A2 individually.
Is there battery voltage? YES - Repair short to power in the wire between the ECM/ PCM (A2, A3) and the PGM-FI main relay 1.n NO - Replace the PGM-FI main relay 1.n |