Inspection and Verification

Verify the customer concern.
Confirm which, if any, warning lights and/or messages were displayed on the instrument cluster.
NOTE: If any warning lights and/or messages were displayed when the fault occurred, refer to Driver Information for DTCs associated with the display, then to the DTC index table for possible sources and actions. Some warnings will appear to clear when the ignition is cycled. This is often because the warning has flagged as a result of one of the vehicle's on-board diagnostic routines having run to detect the fault. If the same routine is not run when the ignition is switched ON, the warning will not reflag until the routine does run. See the DTC summaries for drive cycle routines.

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

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 Chart, 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
Non-Start	Engine does not crank	Security system /Immobilizer engaged ECM relay Battery Park/Neutral switch Starting system Harness Engine seized	Check for DTCs. Contact dealer technical support for information on security system. For starting system, Refer to Starting System . For ECM relay tests, Refer to Pinpoint Test AF . For battery information, refer to the battery care manual. For Park/Neutral tests, and External Controls . For engine information, and refer to Engine .
	Engine cranks, but does not fire	Engine breather system disconnected/restricted Ignition system Fuel system Harness CKP sensor ECM fault	Check engine breather system, Refer to Engine Emission Control . For ignition system, and Engine Ignition . For fuel system, and Fuel Charging and Controls . For CKP tests, refer to Pinpoint Test Q . Contact Dealer technical support for advice on possible ECM failure.
	Engine cranks and fires, but will not start	Purge valve Fuel pump Coolant temperature sensor Spark plugs Check for water ingress into spark plug wells HT short to ground (tracking) check rubber boots for cracks/damage Ignition coil failure(s) Harness	For evaporative emissions components, refer to Evaporative Emissions . For fuel system, and Fuel Charging and Controls . For ECT sensor tests, refer to Pinpoint Test C . For ignition system and Engine Ignition .
Difficult to start	Difficult to start cold	Check coolant anti-freeze content Battery CKP sensor EGR valve stuck open Fuel pump Coolant temperature sensor Purge valve	For battery information, refer to the battery care manual. For CKP sensor tests, Refer to Pinpoint Test Q . For EGR system information, Refer to Engine Emission Control . For fuel system, and Fuel Charging and Controls . For ECT sensor tests, Refer to Pinpoint Test C . For evaporative emissions components, and Evaporative Emissions .
	Difficult to start hot	Injector leak Fuel temperature sensor IAT sensor MAF sensor Purge valve Fuel pump Ignition system Coolant temperature sensor	For fuel system, refer to Fuel Charging and Controls . For fuel temperature sensor tests, refer to Pinpoint Test AI . For IAT sensor tests, refer to Pinpoint Test B . For MAF sensor tests, refer to Pinpoint Test A . For evaporative emissions components, and Evaporative Emissions . For ECT sensor tests, refer to Pinpoint Test C .
	Difficult to start after hot soak (vehicle standing after engine has reached operating temperature)	Injector leak Fuel temperature sensor IAT sensor MAF sensor Purge valve Fuel pump Ignition system Coolant temperature sensor
	Engine cranks too fast/slow	Compressions high/low Battery Starting system	Check compressions, refer to Engine . For battery information, refer to the battery care manual. For starting system, and Starting System .
Engine stalls	Engine stalls soon after start	Breather system disconnected/restricted ECM relay Harness MAF sensor Coolant temperature sensor Ignition system Air filter restricted Fuel lines Fuel pressure sensor Air leakage	For breather system, refer to Engine Emission Control . For ECM relay tests, refer to Pinpoint Test AF . For MAF sensor tests, refer to Pinpoint Test A . For ECT sensor tests, refer to Pinpoint Test C . For ignition system, and Engine Ignition . For air filter information, and Intake Air Distribution and Filtering . For fuel system, fuel pressure sensor tests, and Fuel Charging and Controls . For intake system information, and Intake Air Distribution and Filtering .
	Engine stalls on overrun	ECM relay Throttle sensors	For ECM relay tests, refer to Pinpoint Test AF . For throttle sensor tests, refer to Pinpoint Test E . For fuel system, refer to Fuel Charging and Controls .
	Engine stalls at steady speed	ECM relay CKP sensor Throttle sensors Harness	For ECM relay tests, refer to Pinpoint Test AF . For fuel system, refer to Fuel Charging and Controls . For CKP sensor tests, refer to Pinpoint Test Q . For throttle sensor tests, refer to Pinpoint Test E .
	Engine stalls with cruise control enabled	ECM relay Harness	For ECM relay tests, refer to Pinpoint Test AF .
	Engine stalls when maneuvering	ECM relay Throttle sensors Additional engine loads (PAS, air conditioning, etc) Transmission malfunction CAN network malfunction	For ECM relay tests, refer to Pinpoint Test AF . For throttle position sensor tests, refer to Pinpoint Test E . For accessory drive information, refer to Accessory Drive . For transmission information, and Diagnostic Strategy . For CAN network tests, and Communications Network .
Poor driveability	Engine hesitates/poor acceleration	Fuel pump Injector leak Fuel pressure Fuel lines Air leakage Throttle sensors Throttle motor Ignition system Exhaust gas recirculation Oxygen sensors Transmission malfunction Restricted pedal travel (carpet, etc) APP sensor	For fuel pump, fuel pressure sensor, fuel line and injector tests, refer to Fuel Charging and Controls . For intake system, and Intake Air Distribution and Filtering . For throttle position sensor tests, refer to Pinpoint Test E . For throttle motor tests, refer to Pinpoint Test X . For ignition system, and Engine Ignition . For exhaust gas recirculation, and Engine Emission Control . Check for DTCs relating to Oxygen sensors. Refer to the DTC index for pinpoint tests for DTC set. For transmission information, and Diagnostic Strategy . Check accelerator pedal travel. For APP sensor tests, Refer to Pinpoint Test V . Refer to Pinpoint Test W .
	Engine backfires	Fuel pump Fuel lines Air leakage MAF sensor Oxygen sensors Ignition system Sticking VCT hub APP sensor	For fuel pump and lines tests, refer to Fuel Tank and Lines . For intake system, and Intake Air Distribution and Filtering . For MAF sensor tests, refer to Pinpoint Test A . Check for DTCs relating to Oxygen sensors. Refer to the DTC index for pinpoint tests for DTC set. For ignition system, and Engine Ignition . For VCT information, and refer to Engine . For APP sensor tests, refer to Pinpoint Test V . Refer to Pinpoint Test W .
	Engine surges	Fuel pump Fuel lines MAF sensor Harness Throttle sensors Throttle motor Ignition system	Check fuel pressure. For fuel line information, Refer to Fuel Tank and Lines . For MAF sensor, throttle sensor, and throttle motor relay tests, and Electronic Engine Controls . For ignition system, and Engine Ignition .
	Engine detonates/knocks	KS/circuit malfunction Fuel pump Fuel lines Fuel pressure sensor MAF sensor Oxygen sensors Air leakage Sticking VCT hub BARO sensor malfunction	For KS circuit tests, refer to Pinpoint Test O . Refer to Pinpoint Test P . Check fuel pressure. For fuel line information, refer to Fuel Tank and Lines . For fuel pressure sensor, and Fuel Charging and Controls . For MAF sensor tests, refer to Pinpoint Test A . Check for DTCs relating to Oxygen sensors. Refer to the DTC index for pinpoint tests for DTC set. For intake system, and Intake Air Distribution and Filtering . Check DTCs for VCT range/performance fault. For VCT information, and refer to Engine . For BARO sensor, contact dealer technical support for advice on possible ECM failure
	No throttle response	APP sensor malfunction Throttle sensors Throttle motor	For APP sensor tests, refer to Pinpoint Test V . Refer to Pinpoint Test W . For throttle position sensor tests, refer to Pinpoint Test E . For throttle motor tests, refer to Pinpoint Test X .
	Cruise control inhibited or disabled	Default mode enabled Cruise control switch Throttle sensors Stop lamp switch	Check message center for default message. For cruise control switches, refer to Speed Control . For throttle position sensor tests, refer to Pinpoint Test E . Check electrical guides for stop light switch information.
	Poor throttle response	APP sensor malfunction Throttle sensors Coolant temperature sensor MAF sensor Transmission malfunction Traction control event Air leakage Breather system disconnected/restricted	For APP sensor tests, refer to Pinpoint Test W . Refer to Pinpoint Test W . For throttle position sensor tests, refer to Pinpoint Test E . For ECT sensor tests, refer to Pinpoint Test C . For MAF sensor tests, refer to Pinpoint Test A . For transmission information, refer to Diagnostic Strategy . For intake system, and Intake Air Distribution and Filtering . For breather system information, and Engine Emission Control .
	Engine defaults, warning light and messages. Refer to the Driver Information table	Park/Neutral switch Throttle sensors MAF sensor Coolant temperature sensor Harness	For Park/Neutral tests, refer to External Controls . For throttle position sensor tests, refer to Pinpoint Test E . For MAF sensor tests, refer to Pinpoint Test A . For ECT sensor tests, refer to Pinpoint Test C .