Jaguar XJ (X350). Manual - part 923
Electronic Engine Controls - VIN Range:
G45704->G99999
Overview
There are changes to the engine management system (EMS) for 2006 my, the most obvious of which
will be the change to 7-digit diagnostic trouble codes (DTCs) from the familiar 5-digit, plus the
addition of secondary air injection and changes to evaporative emissions and exhaust gas
recirculation to comply with stage four emissions requirements.
For more information on these systems,
Electronic Engine Controls
Engine Emission Control - VIN Range: G45704->G99999
Evaporative Emissions - VIN Range: G45704->G99999
Inspection and Verification
1 . Verify the customer concern.
2 . Visually inspect for obvious signs of mechanical or electrical damage.
Visual Inspection Chart
Mechanical
Electrical
Engine oil level
Cooling system coolant level
Fuel level
Fuel contamination/grade/quality
Throttle body
Poly-vee belt
Fuses
Wiring harness
Electrical connector(s)
Sensor(s)
Engine control module (ECM)
Transmission control module
1 . If an obvious cause for an observed or reported concern is found, correct the cause (if possible)
before proceeding to the next step
2 . If the cause is not visually evident, use the Jaguar approved diagnostic system or a scan tool to
retrieve the fault codes before proceeding to the DTC Index, or the symptom chart if no DTCs are set.
Symptom Chart
Symptom
(general)
Symptom (specific)
Possible source
Action