Jaguar XJ (X350). Service manual — part 1174

Diagnostic trouble code (DTC) index

DTC

Description

Possible Source

Action

C1291

Forward Looking

Radar (FLR) sensor

temperature out of

range

FLR sensor is too warm or

too cold

FLR sensor failure

Warm up or cool down the FLR

sensor to above 40°C or below 70°C.

CLEAR the DTC. TEST the system for

normal operation. If the DTC is

repeated, INSTALL a new FLR sensor.

C1292

FLR sensor blockage

detection

FLR sensor is blocked

Remove any blockages (snow/leaves

etc.) from the FLR sensor.

C1293

FLR sensor

automatic

alignment offset

angle out of range

Sensor requires mechanical

levelling

FLR sensor is in service

alignment mode

Check FLR sensor levelling. (This is

done in a similar way to control

module alignment in earlier systems).

Complete service alignment. Refer to

the Jaguar approved diagnostic

system.

C1294

Active speed or

vehicle speed out of

range

Speed related fault with the

engine control module
(ECM), transmission
control module (TCM),
dynamic suspension
control module (DSCM),
or instrument cluster
modules

ACC module failure

Carry out a full vehicle DTC check.

Check the ECM, TCM, DSCM, or

instrument cluster modules for

stored codes. If no DTC's are

indicated in the ECM, TCM, DSCM, or

instrument cluster modules, INSTALL

a new ACC module.

C1459

Forward alert

switch circuit failure

Forward alert switch failure

Forward alert switch to ACC

module circuit short
circuit to B+

Forward alert switch to ACC

module circuit open
circuit

For forward alert switch circuit tests,

GO to Pinpoint Test G240073p1.

C1748

Forward alert

switch circuit short

to GROUND

Forward alert switch failure

Forward alert switch to ACC

module circuit short
circuit to GROUND

For forward alert switch circuit tests,

GO to Pinpoint Test G240073p2.

B2373

Forward alert

switch LED 1 circuit

failure

Forward alert switch failure

Forward alert switch LED to

ACC module circuit short

For forward alert switch LED tests,

GO to Pinpoint Test G240073p3.

to B+

Forward alert switch LED to

ACC module circuit open
circuit

C1920

Forward alert

switch LED 1 circuit

short to GROUND

Forward alert switch failure

Forward alert switch LED to

ACC module circuit short
circuit to GROUND

For forward alert switch LED tests,

GO to Pinpoint Test G240073p4.

C1935 Chime circuit failure

Chime module to ACC

module circuit short to
B+

Chime module to ACC

module circuit open
circuit

For adaptive speed control chime

module circuit tests, GO to Pinpoint

Test G240073p5.

B1342

Internal ACC

module fault

ACC module failure

INSTALL a new ACC module.

B2369

Chime output

circuit short to

GROUND

Chime output circuit short to

GROUND

For adaptive speed control chime

module circuit tests, GO to Pinpoint

Test G240073p6.

B2477

Module

configuration

failure

ACC module is not correctly

configured

Configure the ACC module. Refer to

the Jaguar approved diagnostic

system.

U2023

CAN fault message

received from other

network modules

CAN/ACC module related

fault with the ECM, TCM,
DSCM, or instrument
cluster modules

ACC module internal CAN

fault

CAN network fault

Carry out a full vehicle DTC check.

Check the ECM, TCM, DSCM, or

instrument cluster modules for

stored ACC related codes. For CAN

circuit tests,

Communications Network

U2520 CAN IC missing

IC CAN circuit short to B+,

open circuit, short circuit
to ground

For CAN circuit tests,

Communications Network

U2521 CAN DSCM missing

DSCM CAN circuit short to

B+, open circuit, short
circuit to ground

For CAN circuit tests,

Communications Network

U2522 CAN TCM missing

TCM CAN circuit short to B+,

open circuit, short circuit
to ground

For CAN circuit tests,

Communications Network

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U2523 CAN ECM missing

ECM CAN circuit short to B+,

open circuit, short circuit
to ground

For CAN circuit tests,

Communications Network

U2516 CAN network fault

Can network circuit fault

For CAN circuit tests,

Communications Network

U0433

Invalid data from

FLR sensor

FLR sensor failure

INSTALL a new FLR sensor.

U0235

No communication

with FLR sensor

FLR sensor

FLR sensor CAN circuit

FLR sensor CAN circuit tests, GO to

Pinpoint Test G240073p7.

P0610

ACC module vehicle

option

configuration error

ECM configuration does not

support ACC

Check the configuration of the ECM.

Refer to the Jaguar approved

diagnostic system.

P2583 FLR sensor data

FLR sensor

FLR sensor CAN circuit

FLR sensor CAN circuit tests, GO to

Pinpoint Test G240073p7.

Pinpoint Tests

PINPOINT TEST G240073p1 : DTC
C1459: FORWARD ALERT SWITCH
CIRCUIT TESTS

G240073t1 : CHECK THE FORWARD ALERT SWITCH FOR OPEN CIRCUIT

1. Disconnect the battery negative terminal.

Battery Disconnect and Connect 2. Disconnect the ACC module connector IP78. 3. Disconnect the

forward alert switch connector IP50. 4. Measure the resistance between the ACC module connector

IP78, pin 20 (U) and forward alert switch connector IP50, pin 04 (U).

Is the resistance greater than 5 ohms?

-> Yes

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

DTC. TEST the system for normal operation.

-> No

GO to Pinpoint Test G240073t8.

G240073t8 : CHECK THE FORWARD ALERT SWITCH FOR SHORT CIRCUIT TO
B+

1. Reconnect the battery negative terminal.

Battery Connect (86.15.15) 2. Turn the ignition switch to the ON position. 3. Measure the voltage

between the ACC module connector IP78, pin 20 (U) and GROUND.

Is the voltage greater than 3 volts?

-> Yes

REPAIR the short to B+. For additional information, refer to the wiring diagrams. CLEAR the DTC. TEST

the system for normal operation.

-> No

INSTALL a new forward alert switch.

Speed Control Deactivator Switch (19.75.20) CLEAR the DTC. TEST the system for normal operation.

If the DTC is repeated, INSTALL a new ACC module.

Speed Control Module (19.75.26)

PINPOINT TEST G240073p2 : DTC
C1748: FORWARD ALERT SWITCH
CIRCUIT TEST

G240073t2 : CHECK THE FORWARD ALERT SWITCH CIRCUIT FOR SHORT
CIRCUIT TO GROUND

1. Disconnect the battery negative terminal.

Battery Disconnect and Connect 2. Disconnect the ACC module connector IP78. 3. Disconnect the

forward alert switch connector IP50. 4. Measure the resistance between the ACC module connector,

pin 20 (U) and GROUND.

Is the resistance less than 10,000 ohms?

-> Yes

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

TEST the system for normal operation.

-> No

INSTALL a new forward alert switch.

Speed Control Deactivator Switch (19.75.20) CLEAR the DTC. TEST the system for normal operation.

If the DTC is repeated, INSTALL a new ACC module.

Speed Control Module (19.75.26)

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