Diagnostic Test
WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
- ACTIVE DTC
- With the scan tool, read DTCs.
Is the DTC active?
Yes
- Go To 2
No
- Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to STANDARD PROCEDURE .
- With the scan tool, read DTCs.
- CHECK FOR DIRTY OR LOOSE CONNECTIONS
- Visually inspect the positive and negative connections at the battery.
- Visually inspect the battery negative connections at the engine block.
Are the connections tight and free of corrosion?
Yes
- Go To 3
No
- Clean and/or tighten the connections.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
- CHECK FOR ADD-ON OR ACCESSORY WIRES AT BATTERY TERMINAL
- Check for add-on or accessory wiring at positive (+) terminal of the battery.
Are there any damaged wires at the battery?
Yes
- Remove defective or miss wired add-on or accessory wiring from battery.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
No
- Go To 4
- Check for add-on or accessory wiring at positive (+) terminal of the battery.
- CHECK FOR HIGH RESISTANCE IN THE B+ CIRCUIT
- Measure the voltage between the B+ post of the generator and the B+ post of the battery while the engine is running.
Is the voltage above 0.4 Volts?
Yes
- Repair the high resistance in the B+ circuit from battery to the generator.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
No
- Go To 5
- Measure the voltage between the B+ post of the generator and the B+ post of the battery while the engine is running.
- CHECK FOR HIGH RESISTANCE IN THE B+ CROSS OVER CABLE
- Measure the voltage between the B+ post of the generator and the B+ post of the right side battery to the left side battery while the engine is running.
Is the voltage above 0.4 Volts?
Yes
- Repair the high resistance in the B+ cross over cable from right side battery to left side battery.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
No
- Go To 6
- Measure the voltage between the B+ post of the generator and the B+ post of the right side battery to the left side battery while the engine is running.
- CHECK FOR HIGH RESISTANCE IN THE GROUND CIRCUIT
- Measure the voltage between the generator case and the B- post of the battery.
Is the voltage above 0.1 Volts?
Yes
- Repair the high resistance in the ground circuit.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
No
- Go To 7
- Measure the voltage between the generator case and the B- post of the battery.
- GENERATOR
- Turn the ignition off.
- Disconnect the Generator field harness connector.NOTE:
Check connectors - Clean/repair as necessary.
- Measure the resistance between the generator field terminals at the generator.
Is the resistance between 0.5 and 15.0 Ohms?
Yes
- Go To 8
No
- Replace the Generator in accordance with the service information.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
- POWERTRAIN CONTROL MODULE (PCM)
- Disconnect the PCM connectors.
- Measure and record the voltage between battery positive circuit of the PCM harness connector and the battery negative circuits of the PCM harness connector.
- Reconnect the PCM connectors.
- Use the scan tool to measure and record battery voltage.
- Compare the voltage reading from the voltmeter with that of the scan tool.
Are the readings within 3.0 Volts of each other?
Yes
- Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to STANDARD PROCEDURE .
No
- Replace and program the Powertrain Control Module in accordance with the service information.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .