Jaguar XJ (X350). Manual — part 1110

PINPOINT TEST G251562p7 : CHECK
THE POWER AND GROUND SUPPLIES
TO THE FUEL PUMP DRIVER MODULE

G251562t34 : CHECK THE POWER SUPPLY FROM THE FUEL PUMP RELAY TO
THE FUEL PUMP DRIVER MODULE

1. Disconnect the fuel pump driver module electrical connector, CR26. 2. Make sure the fuel pump

relay is energized. 3. Measure the voltage between CR26, pin 09 (N) and GROUND.

Is the voltage less than 10 volts?

-> Yes

REPAIR the circuit between the battery and the fuel pump driver module. This circuit includes the

fuel pump relay and the rear power distribution box (fuse 24). For additional information, refer to

the wiring diagrams.

-> No

GO to Pinpoint Test G251562t35.

G251562t35 : CHECK THE GROUND TO THE FUEL PUMP DRIVER MODULE

1. Measure the resistance between CR26, pin 02 (B) and GROUND.

Is the resistance greater than 5 ohms?

-> Yes

REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams.

-> No

CHECK for DTCs. Continue to pinpoint test indicated by the DTC.

Pinpoint Tests

PINPOINT TEST G251562p1 : P0460;
FUEL LEVEL SENSOR(S) CIRCUIT
RANGE/PERFORMANCE

G251562t1 : CHECK THE SIGNAL CIRCUIT BETWEEN THE REM AND LEVEL
SENSOR 1 FOR HIGH RESISTANCE

1. Disconnect the REM electrical connector, CR04. 2. Disconnect the left-hand fuel level sensor

electrical connector, FP04. 3. Measure the resistance between CR04, pin 15 (WR) and FP04, pin 01

(WR).

Is the resistance greater than 5 ohms?

-> Yes

REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. CLEAR the

DTC. TEST the system for normal operation.

-> No

GO to Pinpoint Test G251562t4.

G251562t4 : CHECK THE SIGNAL CIRCUIT BETWEEN THE REM AND LEVEL
SENSOR 1 FOR SHORT TO GROUND

1. Measure the resistance between CR04, pin 15 (WR) and GROUND.

Is the resistance less than 10,000 ohms?

-> Yes

REPAIR the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTC.

TEST the system for normal operation.

-> No

GO to Pinpoint Test G251562t5.

G251562t5 : CHECK THE SIGNAL CIRCUIT BETWEEN THE REM AND LEVEL
SENSOR 1 FOR SHORT TO B+

1. Measure the voltage between CR04, pin 15 (WR) and GROUND.

Is the voltage greater than 3 volts?

-> Yes

REPAIR the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTC.

TEST the system for normal operation.

-> No

GO to Pinpoint Test G251562t2.

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G251562t2 : CHECK THE SIGNAL CIRCUIT BETWEEN THE REM AND LEVEL
SENSOR 2 FOR HIGH RESISTANCE

1. Disconnect the right-hand fuel level sensor electrical connector, FP07. 2. For vehicles without

supercharger, measure the resistance between CR04, pin 16 (WU) and FP07, pin 01 (WU). 3. For

vehicles with supercharger, measure the resistance between CR04, pin 16 (WU) and FP03, pin 01

(WU).

Is the resistance greater than 5 ohms?

-> Yes

REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. CLEAR the

DTC. TEST the system for normal operation.

-> No

GO to Pinpoint Test G251562t6.

G251562t6 : CHECK THE SIGNAL CIRCUIT BETWEEN THE REM AND LEVEL
SENSOR 2 FOR SHORT TO GROUND

1. Measure the resistance between CR04, pin 16 (WU) and GROUND.

Is the resistance less than 10,000 ohms?

-> Yes

REPAIR the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTC.

TEST the system for normal operation.

-> No

GO to Pinpoint Test G251562t7.

G251562t7 : CHECK THE SIGNAL CIRCUIT BETWEEN THE REM AND LEVEL
SENSOR 2 FOR SHORT TO B+

1. Measure the voltage between CR04, pin 16 (WU) and GROUND.

Is the voltage greater than 3 volts?

-> Yes

REPAIR the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTC.

TEST the system for normal operation.

-> No

GO to Pinpoint Test G251562t3.

G251562t3 : CHECK THE COMMON CIRCUIT BETWEEN THE REM AND LEVEL
SENSORS FOR HIGH RESISTANCE

1. Disconnect the REM electrical connector, CR11. 2. Measure the resistance between CR11, pin 23

(BK) and FP04, pin 03 (BK). 3. Measure the resistance between CR11, pin 23 (BK) and FP07, pin 03

(BK).

Is either resistance greater than 5 ohms?

-> Yes

REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. CLEAR the

DTC. TEST the system for normal operation.

-> No

GO to Pinpoint Test G251562t8.

G251562t8 : CHECK THE COMMON CIRCUIT BETWEEN THE REM AND LEVEL
SENSORS FOR SHORT TO GROUND

1. Measure the resistance between CR11, pin 23 (BK) and GROUND.

Is the resistance less than 10,000 ohms?

-> Yes

REPAIR the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTC.

TEST the system for normal operation.

-> No

GO to Pinpoint Test G251562t9.

G251562t9 : CHECK THE COMMON CIRCUIT BETWEEN THE REM AND LEVEL
SENSORS FOR SHORT TO B+

1. Measure the voltage between CR11, pin 23 (BK) and GROUND.

Is the voltage greater than 3 volts?

-> Yes

REPAIR the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTC.

TEST the system for normal operation.

-> No

GO to Pinpoint Test G251562t10.

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