P0563
P0563-BATTERY VOLTAGE HIGHP0563 - Battery Voltage High:
WHEN MONITORED
With the key on or the engine running.
SET CONDITION
The battery voltage detected by the ECM is greater than a calibrated value.
POSSIBLE CAUSES
- P0622 Present
- P2502 Present
- P2504 Present
- Batteries improperly installed
- ECM
- Intermittent condition
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.
Diagnostic Test
1. P0622 PRESENT
With the scan tool, read DTCs.
Q: Is P0622 set?
YES: Repair P0622 first. Perform the POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). Powertrain Verification Test - Ver 1
NO: Go To 2
2. P2502 PRESENT
With the scan tool, read DTCs.
Q: Is P2502 set?
YES: Repair P2502 first. Perform the POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). Powertrain Verification Test - Ver 1
NO: Go To 3
3. P2504 PRESENT
With the scan tool, read DTCs.
Q: Is P2504 set?
YES: Repair P2504 first. Perform the POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). Powertrain Verification Test - Ver 1
NO: Go To 4
4. BATTERIES IMPROPERLY INSTALLED
Disconnect the ECM harness connectors.
Measure the battery voltage between the positive circuits and ground of the ECM harness connector.
Q: Is the voltage less than 19 volts?
YES: Go To 5
NO: Install the battery system correctly. Perform the POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). Powertrain Verification Test - Ver 1
5. ECM
Reconnect the battery terminals.
Measure and record the voltage between battery positive pins of the ECM connector and the battery negative circuits of the ECM harness connector.
Reconnect the ECM harness connectors.
Use the scan tool to measure and record battery voltage.
Q: Are the readings within 3 volts of each other?
YES: Refer to the INTERMITTENT CONDITION Symptom (Diagnostic Procedure).
NO: Replace the ECM. Perform the POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). Powertrain Verification Test - Ver 1