Jaguar XJ (X350). Manual — part 794

Is the resistance greater than 100 Kohms?

-> Yes

GO to Pinpoint Test G552800t16.

-> No

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

the system for normal operation.

G552800t16 : CHECK THE INTAKE AIR SHUTOFF THROTTLE RETURN
CIRCUIT FOR HIGH RESISTANCE

1. Measure the resistance between:

C39, harness side C100, harness side

Pin 01

Pin F2

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): - ECM connector - ECM

-> No

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

test the system for normal operation.

G552800t17 : CHECK THE SIGNAL AND RETURN CIRCUITS FOR SHORT
CIRCUIT TO EACH OTHER

1. Key off. 2. Disconnec the ECM connector, C100. 3. Key on, engine off. 4. Measure the resistance

between:

C39, harness side C39, harness side

Pin 06

Pin 01

Is the resistance greater than 100 Kohms?

-> Yes

GO to Pinpoint Test G552800t18.

-> No

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

the system for normal operation.

G552800t18 : CHECK WHETHER THE SHORT CIRCUIT TO GROUND IS IN THE
HARNESS OR THE MODULE

1. Measure the resistance between:

C39, harness side

Battery

Pin 06

Negative terminal

Is the resistance greater than 100 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): - ECM

-> No

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

the system for normal operation.

G552800t19 : CHECK WHETHER THE SHORT CIRCUIT TO POWER IS IN THE
HARNESS OR THE MODULE

1. Key off. 2. Disconnect the ECM connector, C100. 3. Key on, engine off. 4. Measure the resistance

between:

C39, harness side

Battery

Pin 06

Positive terminal

Is the resistance greater than 100 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): - ECM

www.

-> No

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

the system for normal operation.

G552800t20 : CHECK WHETHER THE SHORT CIRCUIT TO POWER IS IN THE
HARNESS OR THE MODULE

1. Key off. 2. Disconnect the ECM connector, C100. 3. Key on, engine off. 4. Measure the resistance

between:

C39, harness side

Battery

Pin 01

Positive terminal

Is the resistance greater than 100 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): - ECM

-> No

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

the system for normal operation.

PINPOINT TEST G552800p2 : RIGHT
HAND BANK EGR ACTUATOR

G552800t55 : CHECK THE RIGHT HAND BANK EGR ACTUATOR RETURN
CIRCUIT

1.

Circuit

Pin

Signal from ECM

02

Ground from ECM 04

Power from ECM

03

2.

Circuit

Pin

EGR actuator - signal

A3

EGR actuator - ground H2

EGR actuator - power

H1

3. Key off. 4. Disconnect the EGR actuator connector, C70. 5. Key on, engine off. 6. Measure the

resistance between:

C70, harness side

Battery

Pin 01

Negative terminal

Is the resistance less than 10 ohms?

-> Yes

GO to Pinpoint Test G552800t51.

-> No

GO to Pinpoint Test G552800t54.

www.