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.