Diagnostic Test

WARNING: This page is about a different variant/trim than selected.

READ AND RECORD DTCS AND ENVIRONMENTAL DATA - ERASE DTCS AND CHECK FOR THE DTC TO RETURN
1. With the scan tool, read DTCs in all Electronic Control Units (ECUs) and record on the repair order.
2. For future reference, run and save a vehicle Scan Report and all related recorded data.
3. With the scan tool, erase all DTCs.
4. Turn the ignition off for a minimum of 10.0 seconds.
5. Turn the ignition on.
6. Using the When Monitored and Set Conditions above and recorded data, operate the vehicle in the conditions that set the DTC.
7. With the scan tool, read DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT DTC .
CHECK FOR OTHER DTCS
1. Refer to the recorded DTCs.
  Are DTCs P0192, P0193 or any 5-Volt supply codes set as active or pending?
  
  Yes
  - Perform the applicable diagnostic procedure(s). Refer to DTC INDEX (1 OF 2) and/or DTC INDEX (2 OF 2) .
  No
  - Go To 3
CHECK THE FUEL SYSTEM FOR CONTAMINATION
1. Check the Fuel System for contamination. Refer to DEF FLUID-DIRT-METAL-OR-OTHER FOREIGN DEBRIS .
  Is there any evidence of contamination?
  
  Yes
  - Repair as necessary in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .
  No
  - Go To 4
RECHECK THE FUEL SYSTEM FOR PROPER IN-TANK FUEL LIFT PUMP FLOW
1. Perform the following to purge air from the system:
  - With the scan tool, actuate the In-Tank Fuel Lift Pump Module.
  - Open the Flow Test Valve for 15 seconds, then close the Valve.
  - Turn the ignition off.
  - Disconnect, empty, and then reconnect the Reservoir Assembly.
2. Perform the following three times to find the average flow rate:
  - With the scan tool, actuate the In-Tank Fuel Lift Pump Module.
  - Open the Flow Test Valve for 15 seconds, then close the valve.
  - Turn the ignition off.
  - Measure and record the amount of fuel in the Reservoir Assembly.
  - Disconnect, empty, and then reconnect the Reservoir Assembly.
3. Add the three recorded measurements and then divide the total by three to calculate the average flow rate.
  NOTE:
  The flow rate specification is 750 ml in 15 seconds.
  
  Does the average flow rate meet or exceed the specification?
  
  Yes
  - Go To 5
  No
  - Replace the Fuel Filter and retest flow rate.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .
CHECK THE ABILITY OF THE PCM TO MONITOR THE FUEL RAIL PRESSURE SENSOR
1. Disconnect the Fuel Rail Pressure Sensor harness connector.
2. With the scan tool, read DTCs.
  NOTE:
  The scan tool should display a P0193-FUEL RAIL PRESSURE SENSOR HIGH DTC as active with the connector disconnected.
  
  Does the scan tool display as described above?
  
  Yes
  - Replace the Fuel Rail Pressure Sensor in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .
  No
  - Go To 6
CHECK RELATED PCM AND COMPONENT CONNECTIONS
1. Perform any Service Bulletins that apply.
2. Disconnect all PCM harness connectors.
3. Disconnect all related in-line harness connections (if equipped).
4. Disconnect the related component harness connectors.
5. 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.
6. Reconnect all PCM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
7. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
8. Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
9. With the scan tool, erase DTCs.
10. Test drive or operate the vehicle in accordance with the when monitored and set conditions.
11. 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.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .
  No
  - The wiring or poor connection problem has been repaired.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .