Jaguar XJ (X350). Manual — part 1124

dynamic

FPCV circuit fault

FPCV failure

Fuel pump module

circuit(s): high
resistance, short circuit
to ground, short circuit
to power

Fuel pump module failure

Fuel injection pump failure

For fuel pump module circuit

tests, GO to Pinpoint Test

G552807p4.

and GO to Pinpoint Test

G552807p6.

For FPCV and circuit tests,

Fuel Charging and Controls For

fuel injection pump,

Fuel Injection Pump

Pinpoint tests

CAUTION: When probing connectors to take measurements in the course of the pinpoint

tests, use the adaptor kit, part number 3548-1358-00. Failure to follow this instruction may result

in damage to the vehicle.

NOTE:

When performing 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.

NOTE:

If DTCs are recorded and a fault is not present when performing the pinpoint tests, an

intermittent concern may be the cause. Always check for loose connections and corroded

terminals.

PINPOINT TEST G552807p1 : REM
POWER SUPPLY AND GROUND
CIRCUITS

G552807t2 : CHECK FOR POWER TO THE REM

1. Rear electronic control module (REM) connector, CR04

Circuit

Pin

REM - power 03

2. Rear electronic control module (REM) connector, CR12

Circuit

Pin

REM - ignition supply 08

3. Rear electronic control module (REM) connector, CR71

Circuit

Pin

REM - ground 15

4. Rear electronic control module (REM) connector, CR73

Circuit

Pin

REM - ground 02

5. Key off. 6. Disconnect the REM electrical connector, CR04. 7. Key on, engine off. 8. Measure the

voltage between:

CR04, harness side

Battery

Pin 03

Negative terminal

Is the voltage greater than 10 volts?

-> Yes

GO to Pinpoint Test G552807t46.

-> No

REPAIR the battery power supply circuit as necessary. For additional information, refer to the wiring

diagrams. Clear any DTCs, test the system for normal operation.

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G552807t46 : CHECK FOR POWER TO THE REM

1. Key off. 2. Disconnect the REM electrical connector, CR12. 3. Key on, engine off. 4. Measure the

voltage between:

CR12, harness side

Battery

Pin 08

Negative terminal

Is the voltage greater than 10 volts?

-> Yes

GO to Pinpoint Test G552807t3.

-> No

REPAIR the ignition supply circuit as necessary. For additional information, refer to the wiring

diagrams. Clear any DTCs, test the system for normal operation.

G552807t3 : CHECK THE REM GROUNDS FOR HIGH RESISTANCE

1. Key off. 2. Disconnect the REM electrical connector, CR71. 3. Measure the resistance between:

CR71, harness side

Battery

Pin 15

Negative terminal

4. Disconnect the REM electrical connector, CR73. 5. Measure the resistance between:

CR73, harness side

Battery

Pin 02

Negative terminal

Are the resistances less than 10 ohms?

-> Yes

An intermittent fault may be present in the wiring harness. Visually check for chaffed wires or other

physical damage to the harness. If no fault is found in the circuit, suspect the following

component(s): - REM connector(s). - REM.

-> No

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

DTCs, test the system for normal operation.

PINPOINT TEST G552807p2 : CRITICAL
FUEL LEVEL SWITCH

G552807t26 : CHECK FOR FUEL IN THE FUEL PUMP MODULE SWIRL POT

1. Remove the fuel pump module locking ring

Fuel Pump Module - 2.7L V6 - TdV6 (19.45.08) 2. Detach and reposition the upper part of the fuel

pump module sufficiently to gain visual access to the swirl pot.

Is there fuel in the swirl pot?

-> Yes

GO to Pinpoint Test G552807t48.

-> No

GO to Pinpoint Test G552807t27.

G552807t27 : CHECK THE FUEL PUMP MODULE SWIRL POT FOR FUEL
LEAKAGE

1. Using a suitable clean container, add fuel to the swirl pot. 2. Check that the swirl pot holds the fuel

for over one minute.

Does the swirl pot hold the fuel?

-> Yes

GO to Pinpoint Test G552807t48.

-> No

INSTALL a new fuel pump module.

Fuel Pump Module - 2.7L V6 - TdV6 (19.45.08) Report the findings in an electronic product quality

report (EPQR).

G552807t48 : CHECK THE CRITICAL FUEL LEVEL SWITCH RESISTANCE
(FULL)

1. Fuel pump module connector, FP13

Circuit

Pin

Critical fuel level switch - signal

06

Critical fuel level switch - signal return 05

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