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 75.0 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 there any O2 Sensor, cylinder misfire, Crank Sensor, MAF Sensor, EGR, Fuel Pressure or Fuel Injector DTCs 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 DELIVERY SYSTEM
1. Perform the CHECKING THE FUEL DELIVERY SYSTEM diagnostic procedure. Refer to CHECKING THE FUEL DELIVERY SYSTEM .
  Were any fuel system problems found?
  
  Yes
  - Perform the appropriate repairs to the fuel system.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .
  No
  - Go To 4
CHECK THE INTAKE AIR SYSTEM FOR RESTRICTIONS
1. Check the Intake Air System for any signs of a restriction.
  Were any Intake Air System restrictions found?
  
  Yes
  - Perform the appropriate repair to the Intake Air System.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .
  No
  - Go To 5
CHECK THE INTAKE AIR SYSTEM FOR LEAKS
1. Perform the Engine Diagnosis and Testing INTAKE AIR SYSTEM LEAK DETECTION test procedure. Refer to INTAKE AIR SYSTEM LEAK DETECTION .
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  Is there evidence of a leak?
  
  Yes
  - Perform the appropriate repair as indicated.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .
  No
  - Go To 6
CHECK THE EXHAUST SYSTEM FOR LEAKS OR RESTRICTIONS
1. Check the Exhaust System for any signs of a leak or restriction.
  Were any Exhaust System problems found?
  
  Yes
  - Perform the appropriate repairs to the Exhaust System.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .
  No
  - Go To 7
CHECK THE EGR SYSTEM FOR LEAKS AND PERFORM THE EGR ACTUATION TESTING PROCEDURE
1. Look for visible signs (soot streaks) of an external EGR leak.
2. With the scan tool, perform the EGR Actuation/Testing procedure.
  Were any problems found with the EGR system?
  
  Yes
  - Perform the appropriate repairs to the EGR system.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .
  No
  - Go To 8
INSTALL A NEW OXYGEN SENSOR AND RETEST FOR DTC
1. Turn the ignition off.
2. Install a new Oxygen Sensor in accordance with the Service Information.
3. Turn the ignition on.
4. With the scan tool, navigate to Actuator Tests and perform the O2 Sensor Replaced procedure.
5. Start the engine.
6. Allow the engine to reach normal operating temperature.
7. Monitor the scan tool for at least five minutes.
8. With the scan tool, read DTCs and record on the repair order.
  Is the DTC active or pending?
  
  Yes
  - Go To 9
  No
  - Replacing the Oxygen Sensor repaired the fault.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, 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.
  - 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 .