Jaguar XJ (X350). Manual — part 670
-> 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): - Fuel injector 4 (INJ1) connector - Fuel Injector 4 (INJ1) - ECM connector - ECM
-> No
GO to Pinpoint Test G552275t74.
G552275t74 : CHECK WHETHER THE SHORT CIRCUIT TO POWER IS IN THE
HARNESS OR THE FUEL INJECTOR
1. Key off. 2. Disconnect the fuel injector 4 (INJ1) connector, C45. 3. Key on, engine off. 4. Measure
the resistance between:
C100, harness side
Battery
Pin L1
Positive terminal
Pin L2
Positive terminal
Are the resistances greater than 100 Kohms?
-> 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): - Fuel injector 4 (INJ1)
-> No
REPAIR the short circuit. For additional information, refer to the wiring diagrams. Clear any DTCs, test
the system for normal operation.
G552275t75 : CHECK WHETHER THE SHORT CIRCUIT IS IN THE HARNESS
OR THE FUEL INJECTOR
1. Key off. 2. Disconnect the fuel injector 4 (INJ1) connector, C45. 3. Key on, engine off. 4. Measure
the resistance between:
C100, harness side C100, harness side
Pin L1
Pin L2
Is the resistance greater than 100 Kohms?
-> 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): - Fuel injector 4 (INJ1)
-> No
REPAIR the short circuit. For additional information, refer to the wiring diagrams. Clear any DTCs, test
the system for normal operation.
PINPOINT TEST G552275p12 : FUEL
INJECTOR AND CIRCUIT, CYLINDER 5
G552275t76 : CHECK THE COMPONENT RESISTANCE
1.
Circuit
Pin
Fuel injector, cylinder 5 - ground 01
Fuel injector, cylinder 5 - control 02
2.
Circuit
Pin
Fuel injector, cylinder 5 - ground L3
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Fuel injector, cylinder 5 - control M1
3. Key off. 4. Disconnect the fuel injector 5 (INJ3) connector, C47. 5. Measure the resistance between:
C47, component side C47, component side
Pin 02
Pin 01
Is the resistance between 180 and 220 Kohms?
-> Yes
GO to Pinpoint Test G552275t77.
-> No
INSTALL a new fuel injector.
Fuel Injector (18.10.01) Clear any DTCs, test the system for normal operation.
G552275t77 : CHECK THE COMBINED FUEL INJECTOR AND HARNESS
RESISTANCE
1. Key off. 2. Connect the fuel injector 5 (INJ3) connector, C47. 3. Disconnect the ECM connector,
C100. 4. Measure the resistance between:
C100, harness side C100, harness side
Pin M1
Pin L3
Is the resistance between 180 and 220 Kohms?
-> Yes
GO to Pinpoint Test G552275t80.
-> No
GO to Pinpoint Test G552275t78.
G552275t78 : CHECK FOR SHORT CIRCUIT BETWEEN THE SIGNAL AND
RETURN CIRCUITS
1. Measure the resistance between:
C100, harness side C100, harness side
Pin M1
Pin L3
Is the resistance greater than 100 Kohms?
-> Yes
GO to Pinpoint Test G552275t79.
-> No
GO to Pinpoint Test G552275t84.
G552275t79 : CHECK THE FUEL INJECTOR CIRCUIT FOR HIGH RESISTANCE
1. Disconnect the fuel injector 5 (INJ3) connector, C47. 2. Measure the resistance between:
C47, harness side C100, harness side
Pin 02
Pin M1
Pin 01
Pin L3
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): - Fuel injector 5 (INJ3) connector - ECM connector - Fuel injector 5 (INJ3)
-> No
REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. Clear any
DTCs, test the system for normal operation.
G552275t80 : CHECK THE FUEL INJECTOR CIRCUIT FOR SHORT CIRCUIT TO
GROUND
1. Key on, engine off. 2. Measure the resistance between:
C100, harness side
Battery
Pin M1
Negative terminal
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