For 1990-2009 cars only
Important Preliminary Checks Before Starting
Perform Diagnostic System Check - Engine Controls before using the Symptom Tables, and verify that all of the following conditions are true:
| • | The PCM and the MIL Service Engine Soon indicators are operating correctly. |
| • | No DTCs are stored. |
| • | Ensure that the engine coolant temperature is not above 132°C (270°F). This condition causes the PCM to operate in Engine Coolant Over Temperature-Fuel Disabled Mode. While in Engine Coolant Over Temperature-Fuel Disabled Mode, the PCM turns fuel off to 4 cylinders at a time in order to keep the engine temperatures from reaching damaging levels. The customer perceives the Engine Coolant Over Temperature-Fuel Disabled Mode as a lack of power, a miss, or a rough idle. If the engine operates in the Engine Coolant Over Temperature-Fuel Disabled Mode, refer to Engine Overheating in Engine Cooling. |
| • | The scan tool data is within the normal operating range. |
| • | Verify the customer's concern. Lcate the correct symptom in the table of contents. Inspect the conditions indicated for that symptom. |
| • | Several of the symptom procedures require a thorough inspection. This step can lead to correcting a condition without further inspections, and can save valuable time. |
| • | If the condition exists as a start and stall, search for the DTCs that are related to the vehicle theft deterrent system. Inspect for improper installation of electrical options such as lights or cellular phones. |
| • | When you diagnose a symptom concern, use the following tables. |
| • | If you cannot isolate the condition with the appropriate table, refer to Intermittent Conditions for further diagnosis. |
| - | Backfire |
