CAUTION: Diagnostics by substituting a component from another vehicle is NOT permitted. Substituting control modules does not guarantee confirmation of the fault and, in addition, may cause additional faults in the vehicle being tested and/or in the vehicle from which the modules are removed.
NOTE: If a control module or component is suspected and the vehicle remains under manufacturer's warranty, refer to the warranty manual (subsection B1.2) before installing a new module/component, or determine if there is a previously approved special program in effect.
1. For ease of use, problems are divided into Leaks and Noise, Vibration and Harshness (NVH) groups.
2. Visually inspect for obvious signs of mechanical and electrical damage. Mechanical factors:
- Leaks/damage in the air intake system
- Fuel leaks
- Coolant level
- Coolant leaks. For more information, refer to: Engine Cooling (303-03B Engine Cooling - 2.2L Duratorq - Td4, Diagnostics and Tests).
- Oil level
- Oil leaks
- Visibly damaged or worn components
- Loose or missing nuts or bolts
3. If an obvious cause for the problem you identified or the customer described is found, correct it (if possible) before moving on to further actions.
4. If the cause is not visually obvious, check the symptom of the malfunction and contact Table of signs of malfunction.
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