6.7L Diesel

P0562-BATTERY VOLTAGE LOW

For complete wiring diagrams refer to Diagrams/Electrical.


- When Monitored:

With the key on or the engine running.

- Set Condition:

The battery voltage detected by the ECM is less than a calibrated value.







Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.

Diagnostic Test


1. P0622 PRESENT

With the scan tool, read DTCs.

Is P0622 set?

Yes

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

No

- Go To 2

2. P2504 PRESENT

With the scan tool, read DTCs.

Is P2504 set?

Yes

- Repair P0504 first.
- Perform POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

No

- Go To 3

3. P2503 PRESENT

With the scan tool, read DTCs.

Is P2503 set?

Yes

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

No

- Go To 4

4. BATTERY TERMINAL CONNECTIONS

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 POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

5. ACCESSORY WIRING

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 POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

No

- Go To6

6. BATTERY(S)

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 POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

7. HIGH RESISTANCE IN WIRE HARNESS

Turn the ignition off.

Disconnect the ECM harness connectors.

Disconnect the battery terminals.

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 Ohms?

Yes

- Go To 8

No

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

8. 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.

Are the readings within 3 volts of each other?

Yes

- Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Intermittent Condition

No

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