Diagnostic Test
WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
- Other DTCS
- Ignition On, Engine Not Running.
- With The Scan Tool, Read DTCS.
Are There Any Other DTCS?
Yes
- Repair All Other DTCS First.
- Perform The POWERTRAIN VERIFICATION TEST. Refer To POWERTRAIN VERIFICATION TEST .
No
- Go To 2
- Check The Coolant Temperature Sensor
- With The Scan Tool, Read The Freeze Frame Data.
Is The Coolant Temperature Reading Uncharacteristically Low For The Operating Conditions?
Yes
- Replace Coolant Temperature Sensor In Accordance With The Service Information.
- Perform The POWERTRAIN VERIFICATION TEST. Refer To POWERTRAIN VERIFICATION TEST .
No
- Go To 3
- With The Scan Tool, Read The Freeze Frame Data.
- Check The Accelerator Pedal Position Sensor
- Monitor The Apps 1 And Apps 2 Voltage With Scan Tool While Depressing The Throttle Pedal.
Is The Voltage Transition Shown On The Scan Tool Smooth While Depressing The Throttle And Is The Volt Swing Smooth?
Yes
- Go To 4
No
- Replace The Apps In Accordance With The Service Information.
- Perform The POWERTRAIN VERIFICATION TEST. Refer To POWERTRAIN VERIFICATION TEST .
- Monitor The Apps 1 And Apps 2 Voltage With Scan Tool While Depressing The Throttle Pedal.
- Check The Exhaust Manifold Pressure Sensor
- With The Scan Tool, Read The Freeze Frame Data.
Is The Exhaust Manifold Pressure Sensor Reading Higher Than The Boost Pressure Reading?
Yes
- Replace The Exhaust Manifold Pressure Sensor In Accordance With The Service Information.
- Perform The POWERTRAIN VERIFICATION TEST. Refer To POWERTRAIN VERIFICATION TEST .
No
- Go To 5
- With The Scan Tool, Read The Freeze Frame Data.
- Check The Intake Manifold Pressure Sensor
- With The Scan Tool, Read The Freeze Frame Data.
Is The Boost Pressure Sensor Reading Higher Than The Exhaust Manifold Pressure Sensor Reading?
Yes
- Replace The Boost Pressure Sensor In Accordance With The Service Information.
- Perform The POWERTRAIN VERIFICATION TEST. Refer To POWERTRAIN VERIFICATION TEST .
No
- Go To 6
- With The Scan Tool, Read The Freeze Frame Data.
- Check For Software Revision/Tsbs
- Check Tsbs For Software Releases.
Are There Any New Software Releases?
Yes
- Reflash The Powertrain Control Module In Accordance With The Service Information.
- Perform The POWERTRAIN VERIFICATION TEST. Refer To POWERTRAIN VERIFICATION TEST .
No
- Go To 7
- Check Tsbs For Software Releases.
- Check For Engine Or Fuel Modifications That Exceed Oem Specifications
- An Engine Or Fuel Modification That Exceeds Oem Specifications Can Affect The Parameters That This Diagnostic Monitors.
- Any Device/Software That Modifies The Values Reported By Any Of The Cummins Actuators/Sensors Could Fail This Diagnostic.
- Any Device That Puts A High Parasitic Load On The Engine Could Also Cause This Diagnostic To Fail.
Is There Evidence Of Engine Or Fuel Modifications That Exceed Oem Specifications?
Yes
- Return Vehicle To Customer.
No
- Replace Powertrain Control Module In Accordance With The Service Information.
- Perform The POWERTRAIN VERIFICATION TEST. Refer To POWERTRAIN VERIFICATION TEST .