Diagnostic Test
- DTC IS ACTIVE
- Diagnose and repair any other active component or circuit DTCs before continuing with this procedure.
- Turn the ignition on.
- With the scan tool, select View DTCs. Copy DTC and Freeze Frame information.
- Start the engine and allow it to reach operating temperature.WARNING:
When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing. Failure to follow these instructions may result in possible serious or fatal injury.
NOTE:Attempt to operate the vehicle under conditions similar to which the DTC was set.
NOTE:It may be necessary to test drive the vehicle within the DTC monitoring conditions in order for this DTC to set.
- With a scan tool, select View DTCs.
Is the status Active for this DTC?
Yes
- Go To 2
No
- Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
- DIAGNOSTIC INSPECTION NOTE:
Anything that affects the speed of the crankshaft can cause this DTC to set.
NOTE:When a misfire is detected, the PCM will shut down the injector control circuit for the misfiring cylinder.
NOTE:Misfire may occur and may not be caused by component failure. Any of the following conditions can cause a misfire:
- Worn serpentine belt
- Misalignment or binding water pump, P/S pump or A/C compressor pulleys
- Improper CKP, CMP, MAP, or TP Sensor mounting.
- Poor connector/terminal to component connection for CKP sensor, CMP sensor, MAP sensor, TP sensor, fuel injector, ignition coil, etc.
- Corroded PCM power or ground circuits.
- Vacuum leaks.
- Restriction in the air induction or exhaust system.
- Internal engine component malfunction.
- Moisture on ignition system components
- Insufficient fuel
- Low quality fuel
- Manual transmission bog
- Towing overload
Were any problems found?
Yes
- Repair as necessary.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
No
- Go To 3
- CHECKING THE FUEL DELIVERY SYSTEM
- Perform the diagnostic procedures for FUEL PRESSURE LEAK DOWN and FUEL DELIVERY SYSTEM OUTPUT - FLOW TEST. Refer to CHECKING THE FUEL DELIVERY SYSTEM (HARD START)
.
Were any problems found?
Yes
- Repair as necessary in accordance with the Service Information.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
No
- Go To 4
- Perform the diagnostic procedures for FUEL PRESSURE LEAK DOWN and FUEL DELIVERY SYSTEM OUTPUT - FLOW TEST. Refer to CHECKING THE FUEL DELIVERY SYSTEM (HARD START)
.
- CHECKING THE IGNITION COIL OPERATION
- Perform the diagnostic procedure for CHECKING THE IGNITION COIL OPERATION. Refer to CHECKING THE IGNITION COIL OPERATION
.
Were any problems found?
Yes
- Repair as necessary in accordance with the Service Information.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
No
- Go To 5
- Perform the diagnostic procedure for CHECKING THE IGNITION COIL OPERATION. Refer to CHECKING THE IGNITION COIL OPERATION
.
- CHECKING THE ENGINE COOLANT TEMPERATURE SENSOR OPERATION
- Perform the diagnostic procedure for CHECKING THE ENGINE COOLANT TEMPERATURE SENSOR OPERATION. Refer to CHECKING THE ENGINE COOLANT TEMPERATURE SENSOR OPERATION
.
Were any problems found?
Yes
- Repair as necessary in accordance with the Service Information.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
No
- Go To 6
- Perform the diagnostic procedure for CHECKING THE ENGINE COOLANT TEMPERATURE SENSOR OPERATION. Refer to CHECKING THE ENGINE COOLANT TEMPERATURE SENSOR OPERATION
.
- CHECKING THE MAP SENSOR OPERATION
- Perform the diagnostic procedure for CHECKING THE MAP SENSOR OPERATION. Refer to CHECKING THE MAP SENSOR OPERATION
.
.
Were any problems found?
Yes
- Repair as necessary in accordance with the Service Information.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
No
- Go To 7
- Perform the diagnostic procedure for CHECKING THE MAP SENSOR OPERATION. Refer to CHECKING THE MAP SENSOR OPERATION
.
.
- CHECKING THE OXYGEN SENSOR OPERATION
- Perform the diagnostic procedure for CHECKING THE OXYGEN SENSOR OPERATION. Refer to CHECKING THE OXYGEN SENSOR OPERATION
.
Were any problems found?
Yes
- Repair as necessary in accordance with the Service Information.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
No
- Go To 8
- Perform the diagnostic procedure for CHECKING THE OXYGEN SENSOR OPERATION. Refer to CHECKING THE OXYGEN SENSOR OPERATION
.
- CHECKING THE ENGINE MECHANICAL SYSTEM
- Perform the diagnostic procedure for CHECKING THE ENGINE MECHANICAL SYSTEM. Refer to CHECKING THE ENGINE MECHANICAL SYSTEM
.
Were any problems found?
Yes
- Repair as necessary in accordance with the Service Information.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
No
- Go To 9
- Perform the diagnostic procedure for CHECKING THE ENGINE MECHANICAL SYSTEM. Refer to CHECKING THE ENGINE MECHANICAL SYSTEM
.
- POWERTRAIN CONTROL MODULE (PCM)
- Using the wiring diagram/schematic as a guide, inspect the wiring and connectors relative to the components tested in this procedure.
- Look for any chafed, pierced, pinched, or partially broken wires.
- Look for broken, bent, pushed out or corroded terminals.
- Monitor the scan tool data relative to this circuit and wiggle test the wiring and connectors.
- Look for the data to change or for the DTC to reset during the wiggle test.
- Perform any technical service bulletins that may apply.
Were any problems found?
Yes
- Repair as necessary.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
No
- Replace and program the PCM in accordance with the Service Information.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
- Using the wiring diagram/schematic as a guide, inspect the wiring and connectors relative to the components tested in this procedure.