Jaguar XJ (X350). Manual — part 646

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 G240048t15.

G240048t15 : 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 G240048t16.

G240048t16 : 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 G240048t17.

G240048t17 : 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 G240048t18.

G240048t18 : 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

IS01, pin 01

Pin 78

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

IS07, pin 01

Pin 79

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

IS02, pin 01

Pin 80

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

IS08, pin 01

Pin 81

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

IS03, pin 01

Pin 82

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

IS09, pin 01

Pin 83

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

IS04, pin 01

Pin 84

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

IS10, 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 G240048p4 :
THROTTLE BODY MOTOR CIRCUIT
(VEHICLES WITHOUT
SUPERCHARGER)

G240048t19 : CHECK THE THROTTLE ACTUATOR CONTROL MOTOR SUPPLY
CIRCUIT FOR SHORT CIRCUIT TO GROUND

1. Disconnect the throttle body electrical connector, PI26. 2. Measure the resistance between:

Throttle body connector PI26, harness side

Battery

Pin 05

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 G240048t20.

G240048t20 : CHECK THE THROTTLE ACTUATOR CONTROL MOTOR SUPPLY
CIRCUIT FOR SHORT CIRCUIT TO POWER

1. Measure the resistance between:

Throttle body connector PI26, harness side

Battery

Pin 05

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

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