P0563

P0563-BATTERY VOLTAGE HIGH

For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
With the key on or the engine running.

- Set Condition:
The battery voltage detected by the Powertrain Control Module (PCM) is greater than a calibrated value.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Pre-Diagnostic Troubleshooting Procedure.

1. BATTERIES IMPROPERLY INSTALLED

NOTE: If DTCs P0622 of P2504 are present, repair those DTCs before continuing with this test.

1. Disconnect the PCM C2 harness connector.
2. Measure the battery voltage between the positive circuits and ground circuits of the PCM C2 harness connector.

Is the voltage below 19.0 Volts?

Yes

- Go To 2

No

- Install the battery system correctly.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test.

2. POWERTRAIN CONTROL MODULE
1. Reconnect the battery terminals.
2. Measure and record the voltage between battery positive pins of the PCM connector and the battery negative circuits of the PCM harness connector.
3. Reconnect the PCM C2 harness connector.
4. Use the scan tool to measure and record battery voltage.

Are the readings within 3 volts of each other?

Yes

- Perform the INTERMITTENT CONDITION diagnostic procedure. Intermittent Condition Test

No

- Replace and program the Powertrain Control Module.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test.