DTC Troubleshooting

DTC Troubleshooting: P0563, P0563

DTC P0563:

ECM/PCM Power Source Circuit Unexpected 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 ON (II), or press the engine start/stop button to select the ON mode.

2. Clear the DTC with the HDS.

3. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

4. Wait 10 seconds.

5. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

6. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P0563 indicated?

YES -

Go to step 7.

NO -

Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at PGM-FI main relay 1 and the ECM/PCM.�

7. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

8. Jump the SCS line with the HDS.

9. Disconnect ECM/PCM connector A (49P).

10. Measure the voltage between ECM/PCM connector terminal A6 and body ground.





Is there battery voltage?

YES -

Go to step 13.

NO -

Go to step 11.

11. Remove PGM-FI main relay 1 (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, then go to step 19.

NO -

Go to step 18.

13. Reconnect ECM/PCM connector A (49P).

14. Disconnect ECM/PCM connector B (49P).

15. Measure the voltage between ECM/PCM connector terminal B3 and body ground.





Is there battery voltage?

YES -

Go to step 16.

NO -

Go to step 26.

16. Remove PGM-FI main relay 1 (A) from the under-hood fuse/relay box.






17. Measure the voltage between ECM/PCM connector terminal B3 and body ground.





Is there battery voltage?

YES -

Repair short to power in the wire between the ECM/PCM (B3) and PGM-FI main relay 1, then go to step 19.

NO -

Go to step 18.

18. Test PGM-FI main relay 1 Testing and Inspection.

Is the relay OK?

YES -

Go to step 26.

NO -

Replace PGM-FI main relay 1, then go to step 19.

19. Reconnect all connectors.

20. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

21. Reset the ECM/PCM with the HDS.

22. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

23. Wait 10 seconds.

24. Do the ECM/PCM idle learn procedure ECM/PCM Idle Learn Procedure.

25. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P0563 indicated?

YES -

Check for poor connections or loose terminals at PGM-FI main relay 1 and the ECM/PCM, then go to step 1.

NO -

Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.�

26. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

27. Reconnect all connectors.

28. Update the ECM/PCM if it does not have the latest software ECM/PCM Update, or substitute a known-good ECM/PCM.

29. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P0563 indicated?

YES -

Check for poor connections or loose terminals at PGM-FI main relay 1 and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM, then recheck. If the ECM/PCM was substituted, go to step 1.

NO -

If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM Service and Repair. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.�