P0560

DTC Troubleshooting: P0560, P0560

DTC P0560:

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. Start the engine, and let it idle.

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

Is DTC P0560 indicated?

YES -

Go to step 5.

NO -

Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the No. 19 BACK UP FI ECU (7.5 A) fuse in the under-hood fuse relay box and the ECM/PCM.�

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

6. Check the No. 19 BACK UP FI ECU (7.5 A) fuse in the under-hood fuse relay box.

Is the fuse OK?

YES -

Go to step 7.

NO -

Go to step 10.

7. Jump the SCS line with the HDS.

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

9. Measure the voltage between ECM/PCM connector terminal A23 and body ground.





Is there battery voltage?

YES -

Go to step 19.

NO -

Repair open in the wire between the ECM/PCM (A23) and the No. 19 BACK UP FI ECU (7.5 A) fuse, then go to step 13.

10. Jump the SCS line with the HDS.

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

12. Check for continuity between ECM/PCM connector terminal A23 and body ground.





Is there continuity?

YES -

Repair short in the wire between the ECM/PCM (A23) and the No. 19 BACK UP FI ECU (7.5 A) fuse. Also replace the No. 19 BACK UP FI ECU (7.5 A) fuse, then go to step 13.

NO -

Check the under-hood fuse/relay box, and replace it if needed Under-Hood Fuse/Relay Box Removal and Installation. Also replace the No. 19 BACK UP FI ECU (7.5 A) fuse, then go to step 13.

13. Reconnect all connectors.

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

15. Reset the ECM/PCM with the HDS.

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

17. Start the engine, and let it idle.

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

Is DTC P0560 indicated?

YES -

Check for poor connections or loose terminals at the No. 19 BACK UP FI ECU (7.5 A) fuse 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.�

19. Reconnect all connectors.

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

21. Start the engine, and let it idle.

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

Is DTC P0560 indicated?

YES -

Check for poor connections or loose terminals at the No. 19 BACK UP FI ECU (7.5 A) fuse and the ECM/PCM. If the ECM/PCM updated, substitute a known-good ECM/PCM, then go to step 21. 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.�