Jaguar XJ (X350). Manual — part 250

U010000

Lost

communication

with ECM

•

Isolated CAN
communication error

•

CAN circuit fault

Clear the DTCs, retest. If CAN fault

codes reset,

U010400

Lost

communication

with speed control

module

•

Isolated CAN
communication error

•

CAN circuit fault

Clear the DTCs, retest. If CAN fault

codes reset,

U012500

Lost

communication

with yaw rate

sensor and

accelerometer

•

Isolated CAN
communication error

•

Local CAN circuit fault

•

Sensor failure

Clear the DTCs, retest. If CAN fault

codes reset,

U012588

Lost

communication

with yaw rate

sensor and

accelerometer

•

Isolated CAN
communication error

•

Local CAN circuit fault

•

Sensor failure

Clear the DTCs, retest. If CAN fault

codes reset,

U01550

Lost

communication

with instrument

pack module

•

Isolated CAN
communication error

•

CAN circuit fault

Clear the DTCs, retest. If CAN fault

codes reset,

U030000

Control module

software

incompatibility

•

Configuration data not
received from EMS

•

Configuration data
received is not
compatible with the DSC
module

Confirm that the configuration data

for the EMS is correct. Confirm that

the correct DSC module is installed.

U030005

Control module

software error

•

Internal HCU software
error

Refer to the warranty policy and

procedures manual if a module is

suspect.

U030055

Stored vehicle

configuration data

does not match

•

Configuration data
received is different from
the previous key cycle

•

Control module swapped
from another vehicle

Confirm the vehicle configuration.

Reconfigure the module using the

Jaguar approved diagnostic system

U030087 Received vehicle

configuration data

•

Configuration data
received is different from
the modules seen on the

Confirm the vehicle configuration.

Reconfigure the module using the

does not match

network

•

Control module swapped
from another vehicle

Jaguar approved diagnostic system

U040164

Invalid data

received from the

ECM

•

Invalid data

Check for engine management

DTCs.

Electronic Engine Controls - VIN

Range: G45704->G99999

or

Electronic Engine Controls - VIN

Range: G45704->G99999

U040192

Torque request

denied by the

ECM

•

Engine management
fault detected

Check for engine management

DTCs.

Electronic Engine Controls - VIN

Range: G45704->G99999

or

Electronic Engine Controls - VIN

Range: G45704->G99999

U040200

TCM messages not

received in the

specified time

•

Isolated CAN
communication error

•

CAN circuit fault

Clear the DTCs, retest. If CAN fault

codes reset,

U040264

Invalid data

received from the

TCM

•

Invalid data received
from the TCM

Check for transmission DTCs.

U040592

Fault declared by

the speed control

module

•

ACC fault detected by the
speed control module

Check for speed control DTCs.

Speed Control - VIN Range: G45704-

>G99999

U042300

Missing reverse

gear signal

•

Isolated CAN
communication error

•

CAN circuit fault

Clear the DTCs, retest. If CAN fault

codes reset,

U210868

Speed control

vehicle

deceleration

implausible

•

Braking requested by
speed control exceeds
allowed threshold

Check for speed control DTCs.

Speed Control - VIN Range: G45704-

>G99999

U300316

Battery voltage

low

•

HCU supply circuit
fault(s)

•

Internal HCU failure

For module supply and ground tests,

GO to Pinpoint Test

G531322p3

.

U300317 Battery voltage

•

HCU supply circuit
fault(s)

For module supply and ground tests,

www.

high

•

Charging system fault(s)

GO to Pinpoint Test

G531322p3

.

Pinpoint tests

PINPOINT TEST G531322p1 : BRAKE
VACUUM ASSIST FUNCTION

G531322t1 : CHECK THE BRAKE PEDAL TRAVEL WITH THE ENGINE OFF

1. Key off. 2. Pump the brake pedal six times and hold firm pressure on the pedal.

•

Did the pedal travel decrease and the pedal go hard as it was pumped?

-> Yes

GO to Pinpoint Test

G531322t2

.

-> No

CHECK the vacuum circuit to the brake booster. Start the engine and idle for three minutes, switch

off then repeat the test. If the pedal travel does not decrease, suspect the brake booster.

G531322t2 : CHECK THE BRAKE PEDAL TRAVEL WITH THE ENGINE
RUNNING

1. With firm pressure still held on the brake pedal, start the engine.

•

Did the pedal travel increase as the engine started?

-> Yes

The vacuum function of the brake booster is operating normally. Check for DTCs indicating a fault

elsewhere in the system.

-> No

CHECK the vacuum circuit to the brake booster.

PINPOINT TEST G531322p2 : BRAKE
SWITCH

G531322t3 : CHECK THE OPERATION OF THE BRAKE SWITCH (PEDAL
RELEASED)

1.

Circuit

Pin

Brake light switch 41

2.

Circuit

Pin

Power supply 01

Signal

02

3. Key off. 4. Disconnect the brake switch electrical connector, CR078. 5. Make sure the brake pedal

is not pressed. 6. 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

GO to Pinpoint Test

G531322t4

.

www.