Jaguar XJ (X350). Manual — part 1019

-> 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.

G549822t235 : 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 G549822t236.

-> No

GO to Pinpoint Test G549822t241.

G549822t236 : 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

Is the resistance greater than 100 Kohms?

-> Yes

GO to Pinpoint Test G549822t237.

-> No

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

the system for normal operation.

G549822t237 : 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.

G549822t238 : 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 G549822t239.

-> No

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

the system for normal operation.

G549822t239 : CHECK WHETHER THE SHORT CIRCUIT TO GROUND IS IN
THE HARNESS OR THE MODULE

1. Measure the resistance between:

www.

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.

G549822t240 : 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.

G549822t241 : 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 06

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.

PINPOINT TEST G549822p18 : BRAKE
PEDAL SWITCH

G549822t242 : CHECK THE OPERATION OF THE BRAKE PEDAL SWITCH
WITH THE BRAKE PEDAL RELEASED

1. Brake pedal switch connector, CR78

Circuit

Pin

Brake pedal switch - power 01

Brake pedal switch - signal

02

2. Engine control module (ECM) connector, EC66

Circuit

Pin

Brake pedal switch - signal G2

3. Key off. 4. Disconnect the brake pedal switch connector, CR78. 5. Make sure the brake pedal is

released. 6. Measure the resistance between:

CR78, component side CR78, component side

Pin 01

Pin 02

Is the resistance less than 10 ohms?

-> Yes

GO to Pinpoint Test G549822t245.

www.