Jaguar XJ (X350). Manual — part 1016

-> Yes

GO to Pinpoint Test G549822t207.

-> No

GO to Pinpoint Test G549822t211.

G549822t207 : CHECK THE APP1 SIGNAL 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 04

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): - APP connector - APP sensor - 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.

G549822t208 : CHECK THE APP1 SIGNAL 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 04

Pin 03

Is the resistance greater than 100 Kohms?

-> Yes

GO to Pinpoint Test G549822t209.

-> No

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

the system for normal operation.

G549822t209 : CHECK WHETHER THE SHORT CIRCUIT TO GROUND IS IN
THE HARNESS OR THE MODULE

1. Measure the resistance between:

CR14, harness side

Battery

Pin 04

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.

G549822t210 : 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 04

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.

G549822t211 : CHECK WHETHER SHORT CIRCUIT 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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CR14, harness side CR14, harness side

Pin 04

Pin 05

Pin 04

Pin 03

Are the resistances 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.

G549822t212 : CHECK THE 5 VOLT SUPPLY CIRCUIT FOR SHORT CIRCUIT
TO GROUND

1. Measure the resistance between:

CR14, harness side

Battery

Pin 05

Negative terminal

Is the resistance greater than 100 Kohms?

-> Yes

GO to Pinpoint Test G549822t213.

-> No

GO to Pinpoint Test G549822t217.

G549822t213 : CHECK THE 5 VOLT SUPPLY CIRCUIT FOR SHORT CIRCUIT
TO POWER

1. Measure the resistance between:

CR14, harness side

Battery

Pin 05

Positive terminal

Is the resistance greater than 100 Kohms?

-> Yes

GO to Pinpoint Test G549822t214.

-> No

GO to Pinpoint Test G549822t219.

G549822t214 : 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 05

Pin E1

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.

G549822t215 : CHECK THE APP1 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 05

Pin 03

Is the resistance greater than 100 Kohms?

-> Yes

GO to Pinpoint Test G549822t216.

-> No

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