P0563
DTC P0563: ECM Power Source Circuit Unexpected Voltage1. Reset the ECM.
2. Turn the ignition switch OFF.
3. Wait 5 seconds.
4. Turn the ignition switch ON (II).
Is DTC P0563 indicated?
YES - Go to step 5
NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the No.6 ECU (ECM) (15 A) fuse in the under-hood fuse/relay box and at the ECM.
5. Turn the ignition switch OFF.
6. Disconnect ECM connector E (31P).
7. Turn the ignition switch ON (II).
8. Measure voltage between ECM connector terminal E7 and body ground.
Is there battery voltage?
YES - Go to step 12.
NO - Go to step 9.
9. Remove the glove box.
10. Remove the PGM-FI main relay 1(A).
11. Check for continuity between ECM connector terminal E7 and body ground.
Is there continuity?
YES - Repair short in the wire between the ECM (E7) and the PGM-FI main relay 1.
NO - Replace the PGM-FI main relay 1.
12. Turn the ignition switch OFF.
13. Reconnect ECM connector E (31P).
14. Measure voltage between ECM connector terminal E7 and body ground.
Is there battery voltage?
YES - Go to step 15.
NO - Update the ECM if it does not have the latest software, or substitute a known-good ECM, then recheck. If the symptom/indication goes away with a known-good ECM, replace the original ECM.
15. Disconnect ECM connector A (31P).
16. Turn the ignition switch ON (II).
17. Measure voltage between body ground and ECM connector terminals A3 and A2 individually.
Is there battery voltage?
YES - Go to step 18.
NO - Update the ECM if it does not have the latest software, or substitute a known-good ECM, then recheck. If the symptom/indication goes away with a known-good ECM, replace the original ECM/PCM.
18. Remove the glove box.
19. Remove the PGM-FI main relay 1 (A).
20. Measure voltage between body ground and ECM connector terminals A3 and A2 individually.
Is there battery voltage?
YES - Repair short to power in the wire between the ECM (A2, A3) and the PGM-FI main relay 1.
NO - Replace the PGM-FI main relay 1.