Jaguar XJ (X350). Service manual — part 680
C30, harness side C100, harness side
Pin 01
Pin D1
Is the resistance 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): - FRP connector - ECM connector - FRP - ECM
-> No
REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. Clear any
DTCs, test the system for normal operation.
G552275t19 : CHECK FOR SIGNAL AND RETURN CIRCUITS SHORT CIRCUIT
TO EACH OTHER
1. Key off. 2. Disconnect the ECM connector, C100. 3. Key on, engine off. 4. Measure the resistance
between:
C30, harness side C30, harness side
Pin 01
Pin 02
Is the resistance greater than 100 Kohms?
-> Yes
GO to Pinpoint Test G552275t20.
-> No
REPAIR the short circuit. For additional information, refer to the wiring diagrams. Clear any DTCs, test
the system for normal operation.
G552275t20 : CHECK WHETHER THE SHORT CIRCUIT TO GROUND IS IN THE
HARNESS OR THE MODULE
1. Measure the resistance between:
C30, harness side
Battery
Pin 01
Negative terminal
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): - ECM
-> No
REPAIR the short circuit. For additional information, refer to the wiring diagrams. Clear any DTCs, test
the system for normal operation.
G552275t21 : CHECK WHETHER THE SHORT CIRCUIT TO POWER IS IN THE
HARNESS OR THE MODULE
1. Key off. 2. Disconnect the ECM connector, C100. 3. Key on, engine off. 4. Measure the resistance
between:
C30, harness side
Battery
Pin 01
Positive terminal
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): - ECM
-> No
REPAIR the short circuit. For additional information, refer to the wiring diagrams. Clear any DTCs, test
the system for normal operation.
G552275t22 : CHECK WHETHER THE SHORT CIRCUIT IS IN THE HARNESS
OR THE MODULE
1. Key off. 2. Disconnect the ECM connector, C100. 3. Key on, engine off. 4. Measure the resistance
between:
C30, harness side C30, harness side
Pin 01
Pin 03
www.
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): - ECM
-> No
REPAIR the short circuit. For additional information, refer to the wiring diagrams. Clear any DTCs, test
the system for normal operation.
G552275t23 : CHECK THE 5 VOLT SUPPLY CIRCUIT FOR SHORT CIRCUIT TO
GROUND
1. Measure the resistance between:
C30, harness side
Battery
Pin 03
Negative terminal
Is the resistance greater than 100 Kohms?
-> Yes
GO to Pinpoint Test G552275t24.
-> No
GO to Pinpoint Test G552275t29.
G552275t24 : CHECK THE 5 VOLT SUPPLY CIRCUIT FOR SHORT CIRCUIT TO
POWER
1. Measure the resistance between:
C30, harness side
Battery
Pin 03
Positive terminal
Is the resistance greater than 100 Kohms?
-> Yes
GO to Pinpoint Test G552275t25.
-> No
GO to Pinpoint Test G552275t31.
G552275t25 : CHECK THE FRP 5 VOLT SUPPLY CIRCUIT FOR HIGH
RESISTANCE
1. Key off. 2. Disconnect the ECM connector, C100. 3. Measure the resistance between:
C30, harness side C100, harness side
Pin 03
Pin D2
Is the resistance 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): - ECM connector - ECM
-> No
REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. Clear any
DTCs, test the system for normal operation.
G552275t26 : CHECK THE FRP SENSOR RETURN CIRCUIT FOR SHORT
CIRCUIT TO POWER
1. Measure the resistance between:
C30, harness side
Battery
Pin 02
Positive terminal
Is the resistance greater than 100 Kohms?
-> Yes
GO to Pinpoint Test G552275t27.
-> No
GO to Pinpoint Test G552275t32.
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