Jaguar XJ (X350). Service manual — part 684
PINPOINT TEST G552275p9 : FUEL
INJECTOR AND CIRCUIT, CYLINDER 2
G552275t49 : CHECK THE COMPONENT RESISTANCE
1.
Circuit
Pin
Fuel injector, cylinder 2 - ground 01
Fuel injector, cylinder 2 - control 02
2.
Circuit
Pin
Fuel injector, cylinder 2 - ground L2
Fuel injector, cylinder 2 - control M2
3. Key off. 4. Disconnect the fuel injector 2 (INJ2) connector, C46. 5. Measure the resistance between:
C46, component side C46, component side
Pin 02
Pin 01
Is the resistance between 180 and 220 Kohms?
-> Yes
GO to Pinpoint Test G552275t50.
-> No
INSTALL a new fuel injector.
Fuel Injector (18.10.01) Clear any DTCs, test the system for normal operation.
G552275t50 : CHECK THE COMBINED FUEL INJECTOR AND HARNESS
RESISTANCE
1. Key off. 2. Connect the fuel injector 2 (INJ2) connector, C46 connected. 3. Disconnect the ECM
connector, C101. 4. Measure the resistance between:
C101, harness side C101, harness side
Pin M2
Pin L2
Is the resistance between 180 and 220 Kohms?
-> Yes
GO to Pinpoint Test G552275t53.
-> No
GO to Pinpoint Test G552275t51.
G552275t51 : CHECK for short CIRCUIT BETWEEN THE SIGNAL AND
RETURN CIRCUITS
1. Measure the resistance between:
C101, harness side C101, harness side
Pin M2
Pin L2
Is the resistance greater than 100 Kohms?
-> Yes
GO to Pinpoint Test G552275t52.
www.
-> No
GO to Pinpoint Test G552275t57.
G552275t52 : CHECK THE FUEL INJECTOR CIRCUIT FOR HIGH RESISTANCE
1. Disconnect the fuel injector 2 (INJ2) connector, C46. 2. Measure the resistance between:
C46, harness side C101, harness side
Pin 02
Pin M2
Pin 01
Pin L2
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 2 (INJ2) connector - ECM connector - Fuel injector 2 (INJ2)
-> No
REPAIR the high-resistance. For additional information, refer to the wiring diagrams. Clear any DTCs,
test the system for normal operation.
G552275t53 : CHECK THE FUEL INJECTOR CIRCUIT FOR SHORT CIRCUIT TO
GROUND
1. Key on, engine off. 2. Measure the resistance between:
C101, harness side
Battery
Pin M2
Negative terminal
Pin L2
Negative terminal
Are the resistances greater than 100 Kohms?
-> Yes
GO to Pinpoint Test G552275t55.
-> No
GO to Pinpoint Test G552275t54.
G552275t54 : CHECK WHETHER THE SHORT CIRCUIT TO GROUND IS IN THE
HARNESS OR THE FUEL INJECTOR
1. Key off. 2. Disconnect the fuel injector 2 (INJ2) connector, C46. 3. Key on, engine off. 4. Measure
the resistance between:
C101, harness side
Battery
Pin M2
Negative terminal
Pin L2
Negative 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 2 (INJ2)
-> No
REPAIR the short circuit. For additional information, refer to the wiring diagrams. Clear any DTCs, test
the system for normal operation.
G552275t55 : CHECK THE FUEL INJECTOR CIRCUIT FOR SHORT CIRCUIT TO
POWER
1. Measure the resistance between:
C101, harness side
Battery
Pin M2
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 2 (INJ2) connector - Fuel injector 2 (INJ2) - ECM connector - ECM
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