Visual Inspection Chart

WARNING: This page is about a different car, the 1998 Jaguar XK8. However, it is still accessible from the selected car via links, so may be relevant.

VISUAL INSPECTION CHART

Mechanical	Electrical
Engine oil level Cooling system coolant level Fuel level Fuel Contamination/grade/quality Throttle body Poly-vee belt Engine breather system pipework/connections EGR pipework condition. (cracking, etc)	Fuses. Wiring harness Electrical connector(s) Sensor(s) Engine control module (ECM)

Verify the following systems are working correctly:
- Air intake system
- Cooling system
- Charging system
- Fuel charging system
- Ignition system
If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step
Where the Jaguar approved diagnostic system is available, complete the S93 report before clearing any or all fault codes from the vehicle.
NOTE: If a DTC cannot be cleared, then there is a permanent fault present that flags again as soon as it is cleared. (The exception to this is P1260, which will only clear following an ignition OFF/ON cycle after rectification.)
If the cause is not visually evident and the Jaguar Approved Diagnostic System is not available, use a fault code reader to retrieve the fault codes before proceeding to the DIAGNOSTIC TROUBLE CODE (DTC) INDEX , or the SYMPTOM CHART if no DTCs are set.
Using the Jaguar approved diagnostic system where available, and a scan tool where not, check the freeze frame data for information on the conditions applicable when the fault was flagged. The format of this will vary, depending on the tool used, but can provide information useful to the technician in diagnosing the fault.

CAUTION: When probing connectors to take measurements in the course of the pinpoint tests, use the adaptor kit, part number 3548-1358-00.

NOTE: When performing electrical voltage or resistance tests, always use a digital multimeter (DMM) accurate to 3 decimal places, and with an up-to-date calibration certificate. When testing resistance, always take the resistance of the DMM leads into account.

NOTE: Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.

SYMPTOM CHART

Symptom (general)	Symptom (specific)	Possible Source	Action
Poor driveability	Engine hesitates/poor acceleration	Fuel pump Air leakage Fuel pressure regulator Fuel lines Harness damage Throttle sensors Throttle motor Spark plugs fouled Ignition coil failure(s) HT short to ground (tracking) check rubber boots for cracks/damage Exhaust gas recirculation (EGR)	Check fuel pressure, refer to FUEL SYSTEM PRESSURE CHECK . Check air intake system for leaks. For fuel pressure regulator tests, refer to FUEL CHARGING & CONTROLS . For fuel line information, refer to FUEL TANK & LINES . For throttle sensor circuit tests, refer to ELECTRONIC ENGINE CONTROLS . For throttle motor circuit tests, refer to FUEL CHARGING & CONTROLS . For ignition system tests, refer to FUEL CHARGING & CONTROLS . Inspect EGR components. For circuit tests, GO to Pinpoint Test G222870P1 . .