Jaguar XJ (X350). Manual — part 992

C35, harness side

Battery

Pin 02

Negative terminal

Is the resistance less than 10 ohms?

-> Yes

GO to Pinpoint Test G549822t23.

-> No

GO to Pinpoint Test G549822t21.

G549822t21 : CHECK THE FUEL TEMPERATURE SENSOR RETURN CIRCUIT
FOR SHORT CIRCUIT TO POWER

1. Measure the resistance between:

C35, harness side

Battery

Pin 02

Positive terminal

Is the resistance greater than 100 Kohms?

-> Yes

GO to Pinpoint Test G549822t22.

-> No

GO to Pinpoint Test G549822t30.

G549822t22 : CHECK THE FUEL TEMPERATURE SENSOR TO ECM RETURN
CIRCUIT FOR HIGH RESISTANCE

1. Key off. 2. Disconnect the ECM connector, C101. 3. Measure the resistance between:

C35, harness side C101, harness side

Pin 02

Pin G3

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.

G549822t23 : CHECK THE VOLTAGE DIFFERENTIAL BETWEEN THE SIGNAL
AND RETURN CIRCUITS

1. Measure the voltage between:

C35, harness side C35, harness side

Pin 01

Pin 02

Is the voltage between 4.8 - 5.2 volts?

-> Yes

GO to Pinpoint Test G549822t27.

-> No

GO to Pinpoint Test G549822t24.

G549822t24 : CHECK THE FUEL TEMPERATURE SIGNAL CIRCUIT FOR
SHORT CIRCUIT TO GROUND

1. Measure the resistance between:

C35, harness side

Battery

Pin 01

Negative terminal

Is the resistance greater than 100 Kohms?

-> Yes

GO to Pinpoint Test G549822t25.

-> No

www.

GO to Pinpoint Test G549822t28.

G549822t25 : CHECK THE FUEL TEMPERATURE SIGNAL CIRCUIT FOR
SHORT CIRCUIT TO POWER

1. Measure the resistance between:

C35, harness side

Battery

Pin 01

Positive terminal

Is the resistance greater than 100 Kohms?

-> Yes

GO to Pinpoint Test G549822t26.

-> No

GO to Pinpoint Test G549822t31.

G549822t26 : CHECK THE FUEL TEMPERATURE SIGNAL CIRCUIT FOR HIGH
RESISTANCE

1. Key off. 2. Disconnect the ECM connector, C101. 3. Measure the resistance between:

C35, harness side C101, harness side

Pin 01

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.

G549822t27 : CHECK THE COMPONENT RESISTANCE

1. Measure the resistance between:

C35, component side C35, component side

Pin 01

Pin 02

Is the resistance between 1 - 500 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): - Fuel temperature connector - Fuel temperature sensor - ECM connector - ECM

-> No

INSTALL a new fuel temperature sensor.

Fuel Temperature Sensor (18.30.99)

G549822t28 : CHECK THE FUEL TEMPERATURE SIGNAL AND RETURN
CIRCUITS FOR SHORT CIRCUIT TO EACH OTHER

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

between:

C35, harness side C35, harness side

Pin 01

Pin 02

Is the resistance greater than 100 Kohms?

-> Yes

GO to Pinpoint Test G549822t29.

-> No

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

the system for normal operation.

G549822t29 : CHECK WHETHER THE SHORT CIRCUIT TO GROUND IS IN THE
HARNESS OR THE MODULE

1. Measure the resistance between:

C35, harness side

Battery

Pin 01

Negative terminal

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