Jaguar XJ (X350). Manual — part 1278

•

Is the resistance greater than 10 Kohms?

-> Yes

An intermittent fault may be present in the wiring harness. Visually check for chaffed wires or other

physical damage to the harness. Refer to the warranty policy and procedures manual if a module is

suspect.

-> No

REPAIR the short circuit. For additional information, refer to the wiring diagrams. Clear the DTC, test

the system for normal operation.

G552802t10 : CHECK THE COMMAND CIRCUIT FOR HIGH RESISTANCE

1. Key off. 2. Disconnect the ECM connector, C101 3. Key on, engine off. 4. Measure the resistance

between:

C073, harness side C101, harness side

Pin 02

Pin H1

•

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.

-> No

REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. Clear the

DTC, test the system for normal operation.

PINPOINT TEST G552802p3 : BATTERY
CABLE VOLT DROP

G552802t11 : CHECK FOR GENERATOR OUTPUT

1. Key off. 2. Measure and record the voltage between:

Battery

Battery

Positive terminal Negative terminal

3. Key on, engine running.

Allow to idle 4. Switch off all electrical loads, including heater blowers. 5. Measure and record the

voltage between:

Battery

Battery

Positive terminal Negative terminal

•

Is the voltage greater than in step 2?

-> Yes

GO to Pinpoint Test G552802t12.

-> No

CHECK the connections at either end of the circuit for cleanliness and security. Check for high

resistance in the circuit. Clean or replace as necessary. Check that the generator is charging. Test the

system for normal operation.

G552802t12 : CHECK FOR VOLT DROP BETWEEN THE BATTERY AND THE
GENERATOR

1. Switch on all lights, select maximum heater blower speed, and turn on the rear heated screen. 2.

Measure the voltage between:

Generator

Battery

Connector, ST07 Positive terminal

•

Is the voltage less than 0.5 volts?

-> Yes

An intermittent fault may be present in the wiring harness. Visually check for chaffed wires or other

physical damage to the harness. Check for DTCs indicating another cause of the concern.

-> No

CHECK the connections at either end of the circuit for cleanliness and security. Check for high

resistance in the circuit. Clean or replace as necessary. Test the system for normal operation.

PINPOINT TEST G552802p4 :
GENERATOR VOLTAGE SENSE
CIRCUIT

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G552802t14 : CHECK THE VOLTAGE AT THE GENERATOR SENSE CIRCUIT

1.

Circuit

Pin

Voltage sense circuit 01

Altcom

02

Altmon

03

2. Key off. 3. Disconnect the generator connector, C073. 4. Measure the voltage between:

C073, harness side

Battery

Pin 01

Negative terminal

•

Is the voltage greater than 10 volts?

-> Yes

Voltage sense circuit is correct. GO to Pinpoint Test G552802p3.

-> No

GO to Pinpoint Test G552802t15.

G552802t15 : CHECK THE VOLTAGE AT THE REAR POWER DISTRIBUTION
BOX

1. Key off. 2. Remove fuse 30 of the rear power distribution box. 3. Measure the voltage between:

Rear power distribution box

Battery

Fuse 30, input pin

Negative terminal

•

Is the voltage greater than 10 volts?

-> Yes

GO to Pinpoint Test G552802t16.

-> No

REPAIR the power supply circuit to the rear power distribution box. For additional information, refer

to the wiring diagrams. Clear the DTC, test the system for normal operation.

G552802t16 : CHECK THE VOLTAGE SENSE CIRCUIT FOR HIGH RESISTANCE

1. Measure the resistance between:

C073, harness side Rear power distribution box

Pin 01

Fuse 30, output pin

•

Is the resistance less than 10 ohms?

-> Yes

RECHECK the fuse. An intermittent fault may be present in the wiring harness. Visually check for

chaffed wires or other physical damage to the harness.

-> No

REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. Clear the

DTC, test the system for normal operation.

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