Jaguar XJ (X350). Manual — part 251

-> No

INSTALL a new brake switch. CLEAR the DTC, test the system for normal operation.

G531322t4 : CHECK THE OPERATION OF THE BRAKE SWITCH (PEDAL
PRESSED)

1. Press the brake pedal. 2. Measure the resistance between:

Brake switch connector CR078, component side Brake switch connector CR078, component side

Pin 01

Pin 02

•

Is the resistance greater than 10 ohms?

-> Yes

INSTALL a new brake switch. CLEAR the DTC, test the system for normal operation.

-> No

GO to Pinpoint Test

G531322t5

.

G531322t5 : CHECK THE POWER SUPPLY TO THE BRAKE PEDAL SWITCH

1. Key on, engine off. 2. Measure the voltage between:

Brake switch connector CR078, harness side

Battery

Pin 01

Negative terminal

•

Is the voltage less than 10 volts?

-> Yes

REPAIR the circuit between the brake switch and battery. This circuit includes fuse 35 of the primary

junction box. For additional information, refer to the wiring diagrams. CLEAR the DTC, test the

system for normal operation.

-> No

GO to Pinpoint Test

G531322t6

.

G531322t6 : CHECK THE BRAKE SWITCH SIGNAL CIRCUIT FOR SHORT
CIRCUIT TO GROUND

1. Key off. 2. Measure the resistance between:

Brake switch connector CR078, harness side

Battery

Pin 02

Negative terminal

•

Is the resistance less than 100 Kohms?

-> Yes

REPAIR the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTC, test

the system for normal operation.

-> No

GO to Pinpoint Test

G531322t7

.

G531322t7 : CHECK THE BRAKE SWITCH SIGNAL CIRCUIT FOR SHORT
CIRCUIT TO POWER

1. Measure the resistance between:

Brake switch connector CR078, harness side

Battery

Pin 02

Positive terminal

•

Is the resistance less than 100 Kohms?

-> Yes

REPAIR the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTC, test

the system for normal operation.

-> No

GO to Pinpoint Test

G531322t8

.

G531322t8 : CHECK THE BRAKE SWITCH SIGNAL CIRCUIT FOR HIGH
RESISTANCE

1. Disconnect the ECM electrical connector, EC300. 2. Measure the resistance between:

Brake switch connector CR078, harness side ECM connector EC300, harness side

www.

Pin 02

Pin 41

•

Is the resistance less than 10 ohms?

-> Yes

CHECK for CAN DTCs indicating a network fault.

-> No

REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. CLEAR the

DTC. TEST the system for normal operation.

PINPOINT TEST G531322p3 : MODULE
SUPPLIES AND GROUNDS

G531322t9 : CHECK THE MODULE PUMP SUPPLY

1.

Circuit

Pin

Pump supply

01

Valves supply

32

Batt supply

02

Ignition supply 08

Pump ground

47

Valve ground

16

2. Key off. 3. Disconnect the ABS module connector, EC030. 4. Measure the voltage between:

EC030, harness side

Battery

Pump supply, pin 01 Negative terminal

•

Is the voltage between 9 and 15 volts?

-> Yes

GO to Pinpoint Test

G531322t10

.

-> No

REPAIR the supply circuit as necessary. This circuit includes fuse 20 of the front power distribution

box. For additional information, refer to the wiring diagrams. Clear the DTC, test the system for

normal operation.

G531322t10 : CHECK THE MODULE VALVES SUPPLY

1. Measure the voltage between:

EC030, harness side

Battery

Valves supply, pin 32 Negative terminal

•

Is the voltage between 9 and 15 volts?

-> Yes

GO to Pinpoint Test

G531322t11

.

-> No

REPAIR the supply circuit as necessary. This circuit includes fuse 04 of the front power distribution

box. For additional information, refer to the wiring diagrams. Clear the DTC, test the system for

normal operation.

G531322t11 : CHECK THE MODULE BATT SUPPLY

1. Measure the voltage between:

EC030, harness side

Battery

Batt supply, pin 02

Negative terminal

www.