Jaguar XJ (X350). Manual — part 999

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

the system for normal operation.

G549822t117 : CHECK THE 5 VOLT SUPPLY CIRCUIT FOR SHORT CIRCUIT
TO GROUND

1. Measure the resistance between:

CR14, harness side

Battery

Pin 02

Negative terminal

Is the resistance greater than 100 Kohms?

-> Yes

GO to Pinpoint Test G549822t118.

-> No

GO to Pinpoint Test G549822t123.

G549822t118 : CHECK THE 5 VOLT SUPPLY CIRCUIT FOR SHORT CIRCUIT
TO POWER

1. Measure the resistance between:

CR14, harness side

Battery

Pin 02

Positive terminal

Is the resistance greater than 100 Kohms?

-> Yes

GO to Pinpoint Test G549822t119.

-> No

GO to Pinpoint Test G549822t125.

G549822t119 : CHECK THE 5 VOLT SUPPLY CIRCUIT FOR HIGH RESISTANCE

1. Key off. 2. Disconnect the ECM connector, EC66. 3. Measure the resistance between:

CR14, harness side EC66, harness side

Pin 02

Pin D2

Is the resistance less than 10 ohms?

-> Yes

Suspect : - 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.

G549822t120 : CHECK THE APP2 SENSOR RETURN CIRCUIT FOR SHORT
CIRCUIT TO POWER

1. Measure the resistance between:

CR14, harness side

Battery

Pin 06

Positive terminal

Is the resistance greater than 100 Kohms?

-> Yes

GO to Pinpoint Test G549822t121.

-> No

GO to Pinpoint Test G549822t126.

G549822t121 : CHECK THE APP2 SUPPLY AND RETURN CIRCUITS FOR
SHORT CIRCUIT TO EACH OTHER

1. Key off. 2. Disconnect the ECM connector, EC66. 3. Key on, engine off. 4. Measure the resistance

between:

CR14, harness side CR14, harness side

Pin 02

Pin 06

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Is the resistance greater than 100 Kohms?

-> Yes

GO to Pinpoint Test G549822t122.

-> No

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

the system for normal operation.

G549822t122 : CHECK THE APP2 SENSOR TO ECM RETURN CIRCUIT FOR
HIGH RESISTANCE

1. Measure the resistance between:

CR14, harness side EC66, harness side

Pin 06

Pin B2

Is the resistance less than 10 ohms?

-> Yes

Suspect : - 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.

G549822t123 : CHECK THE APP2 SUPPLY AND RETURN CIRCUITS FOR
SHORT CIRCUIT TO EACH OTHER

1. Key off. 2. Disconnect the ECM connector, EC66. 3. Measure the resistance between:

CR14, harness side CR14, harness side

Pin 02

Pin 06

Is the resistance greater than 100 Kohms?

-> Yes

GO to Pinpoint Test G549822t124.

-> No

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

the system for normal operation.

G549822t124 : CHECK WHETHER THE SHORT CIRCUIT TO GROUND IS IN
THE HARNESS OR THE MODULE

1. Measure the resistance between:

CR14, harness side

Battery

Pin 02

Negative terminal

Is the resistance greater than 100 Kohms?

-> Yes

Suspect: - ECM

-> No

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

the system for normal operation.

G549822t125 : CHECK WHETHER THE SHORT CIRCUIT TO POWER IS IN THE
HARNESS OR THE MODULE

1. Key off. 2. Disconnect the ECM connector, EC66. 3. Key on, engine off. 4. Measure the resistance

between:

CR14, harness side

Battery

Pin 02

Positive terminal

Is the resistance greater than 100 Kohms?

-> Yes

Suspect: - ECM

-> No

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

the system for normal operation.

G549822t126 : CHECK WHETHER THE SHORT CIRCUIT TO POWER IS IN THE
HARNESS OR THE MODULE

1. Key off. 2. Disconnect the ECM connector, EC66. 3. Key on, engine off. 4. Measure the resistance

between:

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