Jaguar XJ (X350). Manual — part 1289

module/component.

NOTE:

When performing voltage or resistance tests, always use a digital multi meter (DMM) accurate

to three decimal places and with a current calibration certificate. When testing resistance,

always take the resistance of the DMM leads into account.

NOTE:

Check and rectify basic faults before beginning diagnostic routines that involve pinpoint tests.

NOTE:

Inspect connectors for signs of water ingress, and pins for damage and/or corrosion.

NOTE:

If DTCs are recorded and, after performing the pinpoint tests, a fault is not present, an

intermittent concern may be the cause. Always check for loose connections and corroded

terminals.

DTC

Description

Possible Causes

Action

B1342

ECU Internal

failure

•

Audio amplifier module
- internal failure

Suspect the audio amplifier module

replace as required, refer to the new

module installation note at the top of

the DTC Index

B2408

Speaker Line

Short Circuit

•

Audio amplifier module
- short to ground
(speaker circuit)

If this DTC is stored run the audio

speaker cycle test to identify which

channel is shorted. Carry out any

pinpoint tests associated with this DTC

using the manufacturer approved

diagnostic system. Refer to electrical

circuit diagrams, notes and check

amplifier to speaker circuit for short to

ground

B2477 Module

Configuration

•

Audio amplifier module

The module can be configured using the

new module procedure. Check and

Failure

- configuration failure

configure as required

B2642

Low Power

Detected

•

Audio amplifier module
has experienced more
than 30 continuous
seconds under 8.5volts
Generator voltage is
regulated by the engine
control module

Carry out any pinpoint tests associated

with this DTC using the manufacturer

approved diagnostic system. Refer to

electrical circuit diagrams, notes and

check amplifier power circuit for low

voltage

B2643

High Power

Detected

•

Audio amplifier module
has experienced more
than 30 continuous
seconds above 16volts
Generator voltage is
regulated by the engine
control module

Carry out any pinpoint tests associated

with this DTC using the manufacturer

approved diagnostic system. Refer to

electrical circuit diagrams, notes and

check amplifier power circuit for high

voltage

U2601

(D2B)Wake-up

Line Short to

Ground

•

Audio amplifier module
- wake-up line circuit -
short to ground

Refer to electrical circuit diagrams, notes

and check Audio amplifier module (D2B)

wake-up line circuit for short to ground

U2609

(D2B)Wake-up

Line (pulsewidth

out of spec)

•

Audio amplifier module
- wake-up line circuit
fault (pulse< 50mS,
pulse > 110mS)

Refer to electrical circuit diagrams, notes

and check audio amplifier module (D2B)

wake-up Line circuit for fault

U2610

D2B Slave ECU

fails to receive a

report position

•

During initialization no
position status report is
received from one or
more slave modules

Refer to electrical circuit diagrams, notes

and check (D2B) slave modules and

circuit for fault, replace as required,

refer to the new module installation

note at the top of the DTC Index

U2611

D2B Slave ECU

fails to receive an

alarm clear

command

•

On entering alarm state,
(D2B) slave ECU has
failed to receive alarm
clear command

Refer to electrical circuit diagrams, notes

and check (D2B) modules and circuit for

fault, replace as required, refer to the

new module installation note at the top

of the DTC Index

Front Entertainment Control Module

CAUTION: When probing connectors to take measurements in the course of the pinpoint

tests, use the adaptor kit, part number 3548-1358-00

www.

NOTE:

If the control module/component is suspect and the vehicle remains under manufacturer

warranty, refer to the Warranty Policy and Procedures manual (section B1.2), or determine if

any prior approval program is in operation, prior to the installation of a new

module/component.

NOTE:

When performing voltage or resistance tests, always use a digital multimeter (DMM) accurate to

three decimal places and with a current calibration certificate. When testing resistance, always

take the resistance of the DMM leads into account.

NOTE:

Check and rectify basic faults before beginning diagnostic routines that involve pinpoint tests.

NOTE:

Inspect connectors for signs of water ingress, and pins for damage and/or corrosion.

NOTE:

If DTCs are recorded and, after performing the pinpoint tests, a fault is not present, an

intermittent concern may be the cause. Always check for loose connections and corroded

terminals.

DTC

Description

Possible Causes

Action

B1238

Over Temperature

Fault

•

Front
entertainment
control module, CD
multichanger -
overheated (+80
degrees Celsius)

Check cd multichanger module and location

for causes of excessive temperature, install a

new module as required, refer to the new

module installation note at the top of the

DTC Index

B1342

ECU Internal

Failure

•

Front
entertainment
control module -
no radio function

Refer to electrical circuit diagrams, notes

and check front entertainment control

module radio functions for fault, replace as

required, refer to the new module

installation note at the top of the DTC Index

B2004

Internal Media

Over Temperature

Fault

•

Front
entertainment
control module -
internal cd/md has
overheated

Check front entertainment control module

and location for causes of excessive

temperature, install a new module as

required, refer to the new module

installation note at the top of the DTC Index

B2401

Audio Tape Deck

Mechanism Fault

•

Front
entertainment
control module -
tape loading, tape
eject, tape stuck,
tape cut and seek
stop error

Refer to electrical circuit diagrams, check

front entertainment control module install a

new module as required, refer to the new

module installation note at the top of the

DTC Index

B2403

Audio CD/DJ

Internal Fault

•

Front
entertainment
control module, CD
multichanger
module - cd eject
error, cd loading
error

Refer to electrical circuit diagrams, notes

and check cd multichanger module install a

new module as required, refer to the new

module installation note at the top of the

DTC Index

B2477

Module

Configuration

Failure

•

Front
entertainment
control module -
configuration
failure

The module can be configured using the

new module procedure. Check and

configure as required

B2888

Audio Headunit

Media Fault

•

Front
entertainment
control module -
tape loading, tape
eject, tape stuck,
tape cut and seek
stop error

Check front entertainment control module

install a new module as required, refer to

the new module installation note at the top

of the DTC Index

C1977

Audio Steering

Wheel Switch

Circuit Short To

Ground

•

Front
entertainment
control module,
audio steering
wheel switch
circuit - short to
ground

Refer to electrical circuit diagrams, notes

suspect the audio steering wheel switch

check for circuit short to ground

U0147 Lost

Communication

•

Front
entertainment

Refer to electrical circuit diagrams, notes

and check front entertainment control

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