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 Fuel Quantity, Fuel Rail Pressure, EGR System, Crankshaft Position, or Camshaft Position DTCs active or pending?
  
  Yes
  - Repair as necessary in accordance with the Service Information. Refer to DTC INDEX (1 OF 2) and/or DTC INDEX (2 OF 2) .
  No
  - Go To 3
CHECK THE ENGINE FOR A KNOCK
1. Start the engine and allow it to idle for one minute.
2. Operate the engine under conditions in which the complaint occur.
3. Listen for an engine knock.
  Is there a knock present?
  
  Yes
  - Go To 4
  No
  - Replace the Fuel Injector in accordance with the Service Information. If this DTC was accompanied by a Crankcase Pressure Sensor DTC, damage to the cylinder may have occurred.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .
CHECK THE FUEL INJECTOR FOR A LEAK
1. Continue to run the engine at idle.
2. Using the scan tool, perform the Injector Kill Test for the cylinder in question.
  Does the knock go away?
  
  Yes
  - Replace the Fuel Injector in accordance with the Service Information. If this DTC was accompanied by a Crankcase Pressure Sensor DTC, damage to the cylinder may have occurred.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .
  No
  - Diagnose the engine for a mechanical failure.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .