DTC Troubleshooting: P0563 (34)
DTC P0563:
 ECM Power Source Circuit High Voltage
NOTE: Before you troubleshoot, record all freeze data and review the general troubleshooting information.
  1. Turn the ignition switch ON (II).
  1. Check the BATTERY in the DATA LIST with the HDS.
Is there about 18.2 V or more?
YES -
Go to Step 3 .
NO -
Go to Step 4 .
  1. Check the battery voltage with a circuit tester.
Is there about 18.2 V or more?
YES -
Replace the battery, then go to Step 6 .
NO -
Go to Step 8 .
  1. Start the engine.
  1. Check the BATTERY in the DATA LIST with the HDS.
Is there about 18.2 V or more?
YES -
Check the alternator, then go to Step 6 .
NO -
Intermittent failure, the system is OK at this time.■
  1. Reset the ECM with the HDS.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0563 indicated?
YES -
Check for poor connections or loose terminals at 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. Update the ECM if it does not have the latest software, or substitute a known-good ECM.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0563 indicated?
YES -
Check for poor connections or loose terminals at 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.■