Jaguar XJ (X350). Manual — part 1018

CR14, harness side

Battery

Pin 01

Positive terminal

Is the resistance greater than 100 Kohms?

-> Yes

GO to Pinpoint Test G549822t226.

-> No

GO to Pinpoint Test G549822t230.

G549822t226 : CHECK THE APP2 SIGNAL AND POWER CIRCUITS FOR SHORT
CIRCUIT TO EACH OTHER

1. Measure the resistance between:

CR14, harness side CR14, harness side

Pin 01

Pin 02

Is the resistance greater than 100 Kohms?

-> Yes

GO to Pinpoint Test G549822t227.

-> No

GO to Pinpoint Test G549822t231.

G549822t227 : CHECK THE APP2 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 01

Pin C2

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.

G549822t228 : CHECK THE APP2 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 01

Pin 06

Is the resistance greater than 100 Kohms?

-> Yes

GO to Pinpoint Test G549822t229.

-> No

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

the system for normal operation.

G549822t229 : CHECK WHETHER THE SHORT CIRCUIT TO GROUND IS IN
THE HARNESS OR THE MODULE

1. Measure the resistance between:

CR14, harness side

Battery

Pin 01

Negative terminal

Is the resistance greater than 100 Kohms?

-> Yes

Suspect: - ECM

-> No

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

the system for normal operation.

G549822t230 : 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 01

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.

G549822t231 : CHECK WHETHER SHORT CIRCUIT IS IN THE HARNESS OR
THE MODULE

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

CR14, harness side CR14, harness side

Pin 01

Pin 02

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.

G549822t232 : 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 G549822t233.

-> No

GO to Pinpoint Test G549822t238.

G549822t233 : 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 G549822t234.

-> No

GO to Pinpoint Test G549822t240.

G549822t234 : 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?

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