DTC Troubleshooting: P0563 (34)
DTC P0563:
 ECM Power Source Circuit Unexpected Voltage
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.
  1. Turn the ignition switch ON (II).
  1. Clear the DTC with the HDS.
  1. Turn the ignition switch OFF.
  1. Wait 10 seconds.
  1. Turn the ignition switch ON (II).
  1. Check for Temporary DTCs or 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 the under-hood fuse/relay box and the ECM.■
  1. Turn the ignition switch OFF.
  1. Remove the battery.
  1. Disconnect ECM connector A (44P).
  1. Connect a battery.
  1. Measure voltage between ECM connector terminal A6 and body ground.
Is there battery voltage?
YES -
Go to Step 15 .
NO -
Go to Step 12 .
  1. Remove the battery.
  1. Check for continuity between ECM connector terminal A6 and body ground.
Is there continuity?
YES -
Repair short in the wire between the ECM (A6) and the under-hood fuse/relay box, then go to Step 20 .
NO -
Go to Step 19 .
  1. Remove the battery.
  1. Connect the battery.
  1. Measure voltage between ECM connector terminal A8 and body ground.
Is there battery voltage?
YES -
Repair short to power in the wire between the ECM (A8) and the under-hood fuse/relay box, then go to Step 20 .
NO -
Go to Step 19 .
Is PGM-FI main relay 1 OK?
YES -
Go to Step 27 .
NO -
  1. Reconnect all connectors and the battery.
  1. Turn the ignition switch ON (II).
  1. Reset the ECM with the HDS.
  1. Turn the ignition switch OFF.
  1. Wait 10 seconds.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0563 indicated?
YES -
Check for poor connections or loose terminals at the under-hood fuse/relay box and the ECM, then go to Step 1 .
NO -
Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.■
  1. Reconnect all connectors.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0563 indicated?
YES -
Check for poor connections or loose terminals at the under-hood fuse/relay box and the ECM. If the ECM was updated, substitute a known-good ECM, then recheck. If the ECM was substituted, go to Step 1 .
NO -
If the ECM was updated, troubleshooting is complete. If the ECM was substituted, replace the original ECM. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.■