Engine Control Module (ECM)

P0562-BATTERY VOLTAGE LOW

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

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

- Set Condition:
The battery voltage detected by the Engine Control Module (ECM) is less than a calibrated value.





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

1. P0622 PRESENT
1. With the scan tool, read DTCs.

Is P0622 set?

Yes

- Repair the P0622 first. P0622
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test.

No

- Go To 2

2. P2504 PRESENT
1. With the scan tool, read DTCs.

Is P2504 set?

Yes

- Repair the P2504 first. P2504
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test.

No

- Go To 3

3. P2503 PRESENT
1. With the scan tool, read DTCs.

Is P2503 set?

Yes

- Repair the P2503 first. P2503
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test.

No

- Go To 4

4. BATTERY TERMINAL CONNECTIONS
1. Visually inspect the positive and negative connections at the batteries and inspect the battery negative connections at the engine block.

Are the connections free of corrosion and are they tight?

Yes

- Go To 5

No

- Repair the poor connections.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test.

5. ACCESSORY WIRING
1. Check for add-on or accessory wiring at positive (+) terminal of the battery

Are there any damaged wires at the battery?

Yes

- Repair accessory wiring.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test.

No

- Go To 6

6. BATTERY(S)
1. Perform battery load test using the Midtronics Micro 420 battery system tester.

Did the battery(s) pass the test?

Yes

- Go To 7

No

- Replace the weak battery or batteries.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test.

7. HIGH RESISTANCE IN WIRE HARNESS
1. Turn the ignition off.
2. Disconnect the ECM harness connectors.
3. Disconnect the battery terminals.
4. Measure the resistance from the positive and negative battery posts to the appropriate circuits in the ECM harness connector

Is the resistance less than 10.0 Ohms?

Yes

- Go To 8

No

- Repair the high resistance in the wire harness.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test.

8. ENGINE CONTROL MODULE (ECM)
1. Reconnect the battery terminals.
2. Measure and record the voltage between battery positive pins of the ECM connector and the battery negative circuits of the ECM harness connector.
3. Reconnect the ECM harness connectors.
4. Use the scan tool to measure and record battery voltage.

Are the readings within 3.0 volts of each other?

Yes

- Perform the INTERMITTENT CONDITION diagnostic procedure. Intermittent Condition Test.

No

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