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.

CHECK FOR AN ACTIVE DTC
1. Start the engine.
2. Allow the engine to reach normal operating temperature.
3. Test drive the vehicle in accordance with the when monitored conditions.
4. With the scan tool, read DTCs and record on the repair order.
  Is the DTC active or pending?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
CHECK FOR AN INTAKE MANIFOLD LEAK AT A SPECIFIC CYLINDER ON BANK 1
1. Check for any of the following conditions, but not limited to:
  - Intake manifold seals leaking at a specific cylinder.
  - Intake plenum leak at a specific cylinder.
  - Warped/cracked Intake Manifold or plenum.
  - Vacuum leak at a Fuel Injector O-Rings.
  Were any issues found?
  
  Yes
  - Repair the vacuum leak(s) as necessary in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 3
CHECK FOR ISSUES THAT COULD CAUSE A FUEL INJECTOR IMBALANCE ISSUE ON BANK 1
1. Check for any of the following conditions, but not limited to:
  - Verify correct voltage supply at each Fuel Injector.
  - Verify correct control circuit operation at each Fuel Injector.
  - Verify correct Fuel Injector operation (spray pattern).
  Were any issues found?
  
  Yes
  - Repair as necessary.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 4
CHECK CYLINDER COMPRESSION AND IGNITION OPERATION ON BANK 1
1. Perform a cylinder compression and/or cylinder leak down test on each cylinder on bank 1.
2. Check the ignition system for any of the following conditions, but not limited to:
  - Verify correct voltage supply at each Ignition Coil.
  - Verify correct control circuit operation at each Ignition Coil.
  - Verify that the Spark Plugs are matching and are equivalent to OEM specifications.
  - Verify correct Spark Plug gap.
  - Visually inspect the Ignition Coils and Spark Plugs for signs of carbon tracking.
  - Visually inspect the Ignition Coils for signs of damage.
  Were any compression or ignition system issues found?
  
  Yes
  - Repair the compression or ignition system issues as necessary.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 5
CLEAN CARBON DEPOSITS FROM ENGINE CYLINDERS
1. Using the Mopar Combustion cleaner, de-carbon the engine.
2. After driving and clearing the combustion cleaner from the engine, erase DTCs with the scan tool.
3. Test drive the vehicle in accordance with the when monitored conditions.
4. With the scan tool, read DTCs.
  Did the DTC return?
  
  Yes
  - Go To 6
  No
  - Repair is complete.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
CHECK FOR VALVETRAIN AND VARIABLE VALVE SYSTEM ISSUES
1. Check the valvetrain for any of the following conditions, but not limited to:
  - Verify correct operation of the Multi Air system.
  - Check for broken, worn or improperly installed valve springs.
  - Check for broken, worn or improperly installed Camshaft followers.
  - Check for worn Camshaft lobes.
  Were any issues found?
  
  Yes
  - Repair the valvetrain and variable valve system issues as necessary.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 7
REPLACE THE BANK 1 UPSTREAM O2 SENSOR AND CHECK DTCS
1. Replace the Bank 1 Upstream O2 Sensor in accordance with the Service Information. Refer to SENSOR, OXYGEN, REMOVAL .
2. Connect the Bank 1 Upstream O2 Sensor harness connector.
3. Turn the ignition on.
4. With the scan tool, erase DTCs.
5. Using the Freeze Frame Data or When Monitored Conditions above, operate the vehicle within the conditions that set the DTC.
6. With the scan tool, read DTCs.
  Did the DTC return?
  
  Yes
  - Go To 8
  No
  - Replace the Bank 1 Upstream O2 Sensor in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
CHECK RELATED HARNESS CONNECTIONS
1. Disconnect all PCM harness connectors.
2. Disconnect all related in-line harness connections (if equipped).
3. Disconnect the related component harness connectors.
4. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
  - Proper connector installation.
  - Damaged connector locks.
  - Corrosion.
  - Other signs of water intrusion.
  - Weather seal damage (if equipped).
  - Bent terminals.
  - Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
  - Terminals that have been pushed back into the connector cavity.
  - Check for spread terminals and verify proper terminal tension.
  Repair any conditions that are found.
5. Connect all PCM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
6. Connect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
7. Connect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
8. With the scan tool, erase DTCs.
9. Test drive or operate the vehicle in accordance with the when monitored and set conditions.
10. With the scan tool, read DTCs.
  Did the DTC return?
  
  Yes
  - Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information. Refer to MODULE, POWERTRAIN CONTROL (PCM), REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - The wiring or poor connection problem has been repaired.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .