Initial Inspection and Diagnostic Overview

Electronic Engine Controls
1. Verify the customer concern by operating the system.
2. Visually inspect for obvious signs of mechanical and electrical damage.

Mechanical Electrical
- Engine oil level - Fuses. (9, 31, 32, 37)
- Cooling system coolant level - Wiring harness
- Fuel contamination - Electrical connector(s)
- Throttle body - Sensor(s)
- Engine control module (ECM)

3. Verify the following systems are working correctly:
- Air intake system
- Cooling system
- Charging system
- Fuel charging system

4. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
5. Make sure that a power supply is present to the ECM from fuse 32 of the engine compartment fuse box before carrying out diagnostic work on the electronic engine control system.
6. The DTC summaries are generated to support the Jaguar approved diagnostic system, but also provide the basis for diagnosis of OBD related concerns using a suitable generic scan tool, in conjunction with the electrical guides. Until the DTC summaries and electrical guides are available, the engine management system can only be accurately diagnosed using the Jaguar approved diagnostic system.