Jaguar XJ (X350). Manual — part 645

Injector, component side Injector body

Pin 01

Injector body

Pin 02

Injector body

Is either resistance less than 10,000 ohms?

-> Yes

INSTALL a new injector.

Fuel Injectors (18.10.02) CLEAR the DTC and test the system for normal operation.

-> No

GO to Pinpoint Test G240048t3.

G240048t3 : CHECK THE INJECTOR SUPPLY VOLTAGE

1. Key on, engine off. 2. Make sure the EMS relay is energized. 3. Measure the voltage between:

Injector connector, harness side

Battery

Pin 02

Negative terminal

Is the voltage less than 10 Volts?

-> Yes

REPAIR the circuit between the relevant injector harness electrical connector pin 02 and battery. This

circuit includes fuse 13 of the front power distribution box and the EMS relay. For additional

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

-> No

GO to Pinpoint Test G240048t6.

G240048t6 : CHECK THE INJECTOR CONTROL CIRCUIT FOR SHORT CIRCUIT
TO GROUND

1. Key off. 2. Measure the resistance between:

Injector connector, harness side

Battery

Pin 01

Negative terminal

Is the resistance less than 10,000 ohms?

-> Yes

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

test the system for normal operation.

-> No

GO to Pinpoint Test G240048t5.

G240048t5 : CHECK THE INJECTOR CONTROL CIRCUIT FOR SHORT CIRCUIT
TO POWER

1. Measure the resistance between:

Injector connector, harness side

Battery

Pin 01

Positive terminal

Is the resistance less than 10,000 ohms?

-> Yes

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

test the system for normal operation.

-> No

GO to Pinpoint Test G240048t4.

G240048t4 : CHECK THE INJECTOR CONTROL CIRCUIT FOR HIGH
RESISTANCE

1. Disconnect the ECM electrical connector PI300. 2. Measure the resistance between:

Cylinder 1 injector connector, harness side ECM connector PI300, harness side

PI32, pin 01

Pin 78

Cylinder 2 injector connector, harness side ECM connector PI300, harness side

PI36, pin 01

Pin 79

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Cylinder 3 injector connector, harness side ECM connector PI300, harness side

PI33, pin 01

Pin 80

Cylinder 4 injector connector, harness side ECM connector PI300, harness side

PI37, pin 01

Pin 81

Cylinder 5 injector connector, harness side ECM connector PI300, harness side

PI34, pin 01

Pin 82

Cylinder 6 injector connector, harness side ECM connector PI300, harness side

PI38, pin 01

Pin 83

Cylinder 7 injector connector, harness side ECM connector PI300, harness side

PI35, pin 01

Pin 84

Cylinder 8 injector connector, harness side ECM connector PI300, harness side

PI39, pin 01

Pin 85

Is the resistance greater than 5 ohms?

-> Yes

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

DTC and test the system for normal operation.

-> No

INSTALL a new injector.

Fuel Injectors (18.10.02) CLEAR the DTC and test the system for normal operation.

PINPOINT TEST G240048p3 : FUEL
INJECTOR CIRCUITS (VEHICLES
WITH SUPERCHARGER)

G240048t13 : CHECK THE INJECTOR COIL RESISTANCE

1. Disconnect the relevant injector electrical connector:

Injector connector

Injector Cylinder 1, IS01

Injector Cylinder 2, IS07

Injector Cylinder 3, IS02

Injector Cylinder 4, IS08

Injector Cylinder 5, IS03

Injector Cylinder 6, IS09

Injector Cylinder 7, IS04

Injector Cylinder 8, IS10

2. Measure the resistance between the injector pins.

Is the resistance between 12 and 16 ohms?

-> Yes

GO to Pinpoint Test G240048t14.

-> No

INSTALL a new injector.

Fuel Injectors (18.10.02) CLEAR the DTC and test the system for normal operation.

G240048t14 : CHECK THE INJECTOR COIL INSULATION

1. Measure the resistance between:

Injector, component side Injector body

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