Jaguar X-Type Sedan and Estate (Wagon). Manual - part 261

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Measure the resistance between the relevant injector harness electrical connector (IJ1 to 6) pin 1 and EN16 pins as
follows -

Injector 1 pin 1 (NW) and ECM pin 115.
Injector Cyl 3 pin 1 (N) and ECM pin 114.
Injector Cyl 5 pin 1 (NR) and ECM pin 113.
Injector Cyl 2 pin 1 (NU) and ECM pin 120.
Injector Cyl 4 pin 1 (NG) and ECM pin 119.
Injector Cyl 6 pin 1 (NY) and ECM pin 118.

Is the resistance less than 5 ohms?
Yes

GO to A5

REPAIR the circuit between the relevant injector harness electrical connector pin 1 and the ECM electrical connector.
For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

A5: CHECK THE INJECTOR GROUND CIRCUIT FOR SHORT CIRCUIT TO BATTERY

Measure the voltage between the relevant injector harness electrical connector (IJ1 to 6) pin 1 and GROUND.

Is the voltage greater than 1 volt?
Yes

REPAIR the short circuit. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for
normal operation.

GO to A6

A6: CHECK THE INJECTOR GROUND CIRCUIT FOR SHORT CIRCUIT TO GROUND

Measure the resistance between the relevant injector harness electrical connector (IJ1 to 6) pin 1 and GROUND.

Is the resistance less than 10,000 ohms?
Yes

REPAIR the short circuit. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for
normal operation.

INSTALL a new ECM.
REFER to:

Electronic Engine Controls - 2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, VIN Range: E96603->J28492

(303-14A

Electronic Engine Controls - 2.0L NA V6 - AJV6/2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, Diagnosis and Testing).
Before replacing a ECM, contact Dealer technical support.

PINPOINT TEST B : FUEL RAIL PRESSURE SENSOR. P0190, P0192, P0193

TEST

CONDITIONS

DETAILS/RESULTS/ACTIONS

B1: CHECK THE FUEL RAIL PRESSURE SENSOR SUPPLY VOLTAGE

Turn the ignition switch to the OFF position.
Disconnect the fuel rail pressure sensor electrical connector IJ007.
Turn the ignition switch to the ON position.
Measure the supply voltage to the fuel rail pressure sensor electrical connector IJ007 pin 1 (YG) and GROUND.

Is the supply voltage between 4.5 and 5.5 volts?
Yes

GO to B2

REPAIR the circuit between IJ007 pin 1, (YG) and ENS07. For additional information, refer to wiring diagrams. CLEAR
the DTC. TEST the system for normal operation. If the DTC is repeated, INSTALL a new ECM.
REFER to:

Electronic Engine Controls - 2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, VIN Range: E96603->J28492

(303-14A

Electronic Engine Controls - 2.0L NA V6 - AJV6/2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, Diagnosis and Testing).
Before replacing a ECM, contact Dealer technical support.

(The fault could be in any of the components or sensors in the 5 volt supply circuit, or the ECM)

B2: CHECK THE FUEL RAIL PRESSURE SENSOR GROUND CIRCUIT FOR OPEN CIRCUIT

Turn the ignition switch to the OFF position.
Measure the resistance between the fuel rail pressure sensor electrical connector IJ007 pin 2, (WG) and GROUND.

Is the resistance greater than 10,000 ohms?
Yes

REPAIR the circuit between IJ007 pin 2 (WG) and ground at IJS02. For additional information, refer to wiring
diagrams. CLEAR the DTC. TEST the system for normal operation.

GO to B3

B3: CHECK THE FUEL RAIL PRESSURE SENSOR SIGNAL CIRCUIT FOR OPEN CIRCUIT

Disconnect the ECM electrical connector EN16.
Measure the resistance between the fuel rail pressure sensor electrical connector IJ007 pin 3 (W G) and EN16 pin 73.

Is the resistance greater than 5 ohms?
Yes

REPAIR the circuit between IJ007 pin 3 (WG) and EN016 pin 73 (WG). For additional information, refer to wiring
diagrams. CLEAR the DTC. TEST the system for normal operation.

GO to B4

B4: CHECK THE FUEL RAIL PRESSURE SENSOR SIGNAL CIRCUIT FOR SHORT TO GROUND

Measure the resistance between the fuel rail pressure sensor electrical connector IJ007 pin 3 (W G) and GROUND.

Is the resistance less than 10,000 ohms?
Yes

REPAIR the circuit between IJ007 pin 3 (WG) and EN016 pin 73 (WG). For additional information, refer to wiring
diagrams. CLEAR the DTC. TEST the system for normal operation.

GO to B5

B5: CHECK THE FUEL RAIL PRESSURE SENSOR CIRCUIT RESISTANCE

Disconnect the fuel rail pressure sensor electrical connector IJ007.
Measure the resistance between the fuel rail pressure sensor pins 1 and 2.

Is the resistance between 10,000 and 12,000 ohms?
Yes

GO to B6

Install a new fuel rail pressure sensor.

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REFER to:

Fuel Pulse Damper - 2.5L NA V6 - AJV6/3.0L NA V6 - AJ27

(303-04A Fuel Charging and Controls - 2.0L NA

V6 - AJV6/2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, Removal and Installation).
CLEAR the DTC. TEST the system for normal operation.

B6: CHECK THE FUEL RAIL PRESSURE SENSOR CIRCUIT RESISTANCE

Measure the resistance between the fuel rail pressure sensor pins 2 and 3.

Is the resistance between 22,000 and 33,000 ohms?
Yes

GO to B7

Install a new fuel rail pressure sensor.
REFER to:

Fuel Pulse Damper - 2.5L NA V6 - AJV6/3.0L NA V6 - AJ27

(303-04A Fuel Charging and Controls - 2.0L NA

V6 - AJV6/2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, Removal and Installation).
CLEAR the DTC. TEST the system for normal operation.

B7: CHECK THE FUEL RAIL PRESSURE SENSOR CIRCUIT RESISTANCE

Measure the resistance between the fuel rail pressure sensor pins 1 and 3.

Is the resistance between 22,000 and 33,000 ohms?
Yes

Install a new ECM.
REFER to:

Electronic Engine Controls - 2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, VIN Range: E96603->J28492

(303-14A

Electronic Engine Controls - 2.0L NA V6 - AJV6/2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, Diagnosis and Testing).
Before replacing a ECM, contact Dealer technical support.

Install a new fuel rail pressure sensor.
REFER to:

Fuel Pulse Damper - 2.5L NA V6 - AJV6/3.0L NA V6 - AJ27

(303-04A Fuel Charging and Controls - 2.0L NA

V6 - AJV6/2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, Removal and Installation).
CLEAR the DTC. TEST the system for normal operation.

PINPOINT TEST C : FUEL LEVEL SENSORS. P0460

TEST

CONDITIONS

DETAILS/RESULTS/ACTIONS

C1: CHECK THE FUEL LEVEL SENSOR (1) GROUND CIRCUIT

Disconnect the fuel level sensor electrical connector FT2.
Turn the ignition switch to the ON position.
Measure the resistance between electrical connector FT2 pin 3 (B) and GROUND.

Is the resistance less than 5 ohms?
Yes

GO to C2

REPAIR the circuit between electrical connector FT2 pin 3 (B) and GROUND. For additional information, refer to wiring
diagrams.CLEAR the DTC. TEST the system for normal operation.

C2: CHECK THE FUEL LEVEL SENSOR (1) SIGNAL CIRCUIT

Disconnect the Instrument cluster electrical connector IP10.
Measure the resistance between electrical connector FT2 pin 1 (W U) and electrical connector IP10 pin 7 (W U)

Is the resistance less than 5 ohms?
Yes

GO to C3

REPAIR the circuit between FT2 pin 1 (WU) and IP10 pin 7 (W U). For additional information, refer to wiring diagrams.
CLEAR the DTC. TEST the system for normal operation.

C3: CHECK THE FUEL LEVEL SENSOR (1) RHEOSTAT (EMPTY)

Empty the fuel tank.
Measure the resistance between pins 1 and 3 of the fuel level sensor.

Is the resistance 20 ohms?
Yes

GO to C4

INSTALL a new fuel level sensor.
REFER to:

Fuel Tank and Lines

(310-01 Fuel Tank and Lines, Diagnosis and Testing).

CLEAR the DTC. TEST the system for normal operation.

C4: CHECK THE FUEL LEVEL SENSOR (1) RHEOSTAT (FULL)

Fill the fuel tank.
Measure the resistance between pins 1 and 3 of the fuel level sensor.

Is the resistance 160 ohms?
Yes

INSTALL a new instrument cluster.
REFER to:

Instrument Cluster

(413-01 Instrument Cluster, Diagnosis and Testing).

CLEAR the DTC. TEST the system for normal operation.

INSTALL a new fuel level sensor.
REFER to:

Fuel Tank and Lines

(310-01 Fuel Tank and Lines, Diagnosis and Testing).

CLEAR the DTC. TEST the system for normal operation.

C5: CHECK THE FUEL LEVEL SENSOR (2) GROUND CIRCUIT

Disconnect the fuel level sensor electrical connector, FT3.
Turn the ignition switch to the ON position.
Measure the resistance between electrical connector FT3, pin 3 (B) and GROUND.

Is the resistance less than 5 ohms?
Yes

GO to C6

REPAIR the circuit between FT3 pin 3 (B) and ground. For additional information, refer to wiring diagrams. CLEAR the
DTC. TEST the system for normal operation.

C6: CHECK THE FUEL LEVEL SENSOR (2) SIGNAL CIRCUIT

Disconnect the instrument cluster electrical connector IP10.
Measure the resistance between electrical connector FT3 pin 1 (W B) and electrical connector IP10 pin 8(WB)

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Is the resistance less than 5 ohms?
Yes

GO to C7

REPAIR the circuit between FT3 pin 1 (WB) and IP10 pin 8 (W B). For additional information, refer to wiring diagrams.
CLEAR the DTC. TEST the system for normal operation.

C7: CHECK THE FUEL LEVEL SENSOR (2) RHEOSTAT (EMPTY)

Empty the fuel tank.
Measure the resistance between pins 1 and 3 of the fuel level sensor.

Is the resistance 20 ohms?
Yes

GO to C8

INSTALL a new fuel level sensor.
REFER to:

Fuel Tank and Lines

(310-01 Fuel Tank and Lines, Diagnosis and Testing).

CLEAR the DTC. TEST the system for normal operation.

C8: CHECK THE FUEL LEVEL SENSOR (2) RHEOSTAT (FULL)

Fill the fuel tank.
Measure the resistance between pins 1 and 3 of the fuel level sensor.

Is the resistance 160 ohms?
Yes

INSTALL a new instrument cluster.
REFER to:

Instrument Cluster

(413-01 Instrument Cluster, Diagnosis and Testing).

CLEAR the DTC. TEST the system for normal operation.

INSTALL a new fuel level sensor.
REFER to:

Fuel Tank and Lines

(310-01 Fuel Tank and Lines, Diagnosis and Testing).

CLEAR the DTC. TEST the system for normal operation.

PINPOINT TEST D : FUEL PUMP CONTROL MODULE. P1234, P1236

TEST

CONDITIONS

DETAILS/RESULTS/ACTIONS

D1: CHECK THE POWER SUPPLY TO THE FUEL PUMP MODULE

Disconnect the fuel pump module electrical connector CA105.
Turn the ignition switch to the ON position.
Measure the voltage at CA105 pin 9 (NG)

Is the voltage greater than 10 volts?
Yes

GO to D2

REPAIR the circuit between electrical connector CA105 pin 9 (NG) and the ignition switch. CLEAR the DTC. TEST the
system for normal operation.

(This circuit includes the central junction fuse box, ignition relay, and the inertia sw itch. For additional information, refer to w iring diagrams)

D2: CHECK THE GROUND CIRCUIT TO THE FUEL PUMP MODULE

Measure the resistance between CA105 pin 2 (B) and ground.

Is the resistance less than 5 ohms?
Yes

GO to D3

REPAIR the circuit between electrical connector CA105 pin 2 (B) and GROUND. For additional information, refer to
wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

D3: CHECK THE SIGNAL GROUND CIRCUIT TO THE FUEL PUMP MODULE

• NOTE: This test would be necessary if there were an EMC (Electro Magnetic Compatibility) issue with the vehicle.

Turn the ignition switch to the CRANK position.
Measure the resistance between electrical connector CA105 pin 4 (BG) and ground.

Is the resistance less than 5 ohms?
Yes

GO to D4

REPAIR the circuit between electrical connector CA105 pin 4 (BG) and GROUND. For additional information, refer to
wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

(This circuit includes the ECM)

D4: CHECK THE POWER SUPPLY CIRCUIT TO THE FUEL PUMP

Reconnect the fuel pump module electrical connector CA105.
Disconnect the fuel pump electrical connector FT2.
Turn the ignition switch to the ON position.
Measure the voltage between electrical connector FT2 pin 2 (R) and GROUND.

Is the voltage greater than 10 volts?
Yes

GO to D5

INSTALL a new fuel pump module.
REFER to:

Fuel Tank and Lines

(310-01 Fuel Tank and Lines, Diagnosis and Testing).

CLEAR the DTC. TEST the system for normal operation.

D5: CHECK THE SIGNAL GROUND CIRCUIT FOR CONTINUITY

Disconnect the fuel pump module electrical connector CA105.
Measure the resistance between electrical connector CA105 pin 3 (Y) and electrical connector FT2 pin 4 (Y)

Is the resistance less than 5 ohms?
Yes

INSTALL a new fuel pump module.
REFER to:

Fuel Tank and Lines

(310-01 Fuel Tank and Lines, Diagnosis and Testing).

If the DTC is repeated, INSTALL a new fuel pump.
REFER to:

Fuel Tank and Lines

(310-01 Fuel Tank and Lines, Diagnosis and Testing).

CLEAR the DTC. TEST the system for normal operation.

REPAIR the circuit between electrical connector CA105 pin 3 (Y) and electrical connector FT2 pin 4 (Y). For additional

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information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

PINPOINT TEST E : FUEL PUMP FEEDBACK CIRCUITS. P1338

TEST

CONDITIONS

DETAILS/RESULTS/ACTIONS

E1: CHECK SIGNAL POWER CIRCUIT TO FUEL PUMP MODULE

Disconnect fuel pump module electrical connector CA105.
Turn the ignition switch to the ON position.
Measure the voltage between electrical connector CA105 pin 9 (NG) and GROUND.

Is the voltage greater than 10 volts?
Yes

GO to E2

GO to E4

E2: CHECK FEEDBACK CIRCUIT TO FUEL PUMP MODULE

Reconnect fuel pump module electrical connector CA105.
Turn the ignition switch to the CRANK position.
Measure the voltage between ECM electrical connector EN16 pin 25 (W ) and GROUND.

Is the voltage greater than 4 volts?
Yes

No electrical fault in circuit. Recheck DTCs.

GO to E3

E3: CHECK FEEDBACK CIRCUIT FOR CONTINUITY

Disconnect fuel pump module electrical connector CA105.
Disconnect ECM electrical connector EN16.
Measure the resistance between electrical connector CA105 pin 7 (W) and electrical connector EN16 pin 25 (W).

Is the resistance less than 5 ohms?
Yes

GO to E4

REPAIR the circuit between electrical connector CA105 pin 7 (W ) and electrical connector EN16 pin 25 (W). For
additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

E4: CHECK CONTROL CIRCUIT FOR CONTINUITY

Measure the resistance between electrical connector CA105 pin 1 (N) and electrical connector EN16 pin 27 (N).

Is the resistance less than 5 ohms?
Yes

INSTALL a new fuel pump module.
REFER to:

Fuel Tank and Lines

(310-01 Fuel Tank and Lines, Diagnosis and Testing).

CLEAR the DTC. TEST the system for normal operation. If the DTC is repeated, INSTALL a new ECM.
REFER to:

Electronic Engine Controls - 2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, VIN Range: E96603->J28492

(303-14A

Electronic Engine Controls - 2.0L NA V6 - AJV6/2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, Diagnosis and Testing).
Before replacing a ECM, contact Dealer technical support.

REPAIR the circuit between electrical connector CA105 pin 1 (N) and electrical connector EN16 pin 27 (N). For
additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

PINPOINT TEST F : THROTTLE CONTROL POSITION ERROR. P1224, P1229

TEST

CONDITIONS

DETAILS/RESULTS/ACTIONS

F1: CHECK THROTTLE CONTROL CIRCUIT FOR CONTINUITY

Disconnect throttle motor electrical connector EN10.
Disconnect ECM electrical connector EN16.
Measure the resistance between ECM electrical connector EN16 pin 80 (G) and throttle motor electrical connector EN10
pin 2 (G).

Is the resistance less than 5 ohms?
Yes

GO to F2

REPAIR the circuit between ECM electrical connector EN16 pin 80 (G) and throttle motor electrical connector EN10 pin
2 (G). For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

F2: CHECK THROTTLE CONTROL CIRCUIT FOR CONTINUITY

Measure the resistance between ECM electrical connector EN16 pin 106 (R) and throttle motor electrical connector
EN10 pin 1 (R).

Is the resistance less than 5 ohms?
Yes

INSTALL a new ECM.
REFER to:

Electronic Engine Controls - 2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, VIN Range: E96603->J28492

(303-14A

Electronic Engine Controls - 2.0L NA V6 - AJV6/2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, Diagnosis and Testing).
CLEAR the DTC. TEST the system for normal operation.

REPAIR the circuit between ECM electrical connector EN16 pin 106 (R) and throttle motor electrical connector EN10 pin
1 (R). For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

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