Jaguar XJ (X350). Service 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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