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. Ignition on, engine not running.
2. With the scan tool, read DTCs.
  Were there any fuel system or air handling sensor DTCs present?
  
  Yes
  - Perform the Diagnostics for those DTCs before continuing with this one.
  No
  - Go To 3
CHECK THE RATIONALITY OF THE EXHAUST TEMPERATURE SENSORS
1. Turn the ignition off for 10 minutes to allow the Exhaust Temperature Sensors to stabilize.
2. Turn the ignition on.
3. With the scan tool check the temperature values of the Exhaust Temperature Sensors.
  Are the Exhaust Temperature Sensors reading within 43°F of each other?
  
  Yes
  - Go To 4
  No
  - Replace the Exhaust Temperature Sensor that is out of range as compared to the others.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .
CHECK FOR THE DOC/DPF CATALYST MISSING
1. Visually inspect the after treatment exhaust system.
  Is the DOC/DPF Catalyst installed on the vehicle?
  
  Yes
  - Go To 5
  No
  - Replace the DOC/DPF Catalyst in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .
CHECK FOR DAMAGE TO THE DOC/DPF CATALYST
1. Separate the exhaust and inspect the DOC/DPF Catalyst for internal damage or signs of face plugging.
  Was any internal damage found in the DOC/DPF Catalyst?
  
  Yes
  - Replace the after treatment DOC/DPF Catalyst in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .
  No
  - Replace the Exhaust Gas Temperature Sensor 1/3 in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .