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Jaguar XJ (X350). Manual - part 1441

Item Part Number

Description

CJB (central junction box)

Medium speed CAN (controller area network) to other vehicle systems

Front RH (right-hand) climate seat control switch

Front RH (right-hand) seat back climate unit

Front RH (right-hand) seat base climate unit

Front LH (left-hand) seat base climate unit

Front LH (left-hand) seat back climate unit

Front LH (left-hand) climate seat control switch

Climate seat control module

CLIMATE SEAT CONTROL DIAGRAM

NOTE:

A = Hardwired; N = Medium speed CAN bus

Diagnosis and testing

Seats - VIN Range: G00442->H18679

Principles of Operation

For a detailed description of the Seat Control System, refer to the relevant Description and
Operation sections in the workshop manual.
Seats - VIN Range: G00442->H18679

Inspection and Verification

NOTE:

Prior to carrying out any diagnosis, ensure the vehicle battery is in a good serviceable
condition, refer to the battery care manual.

1 . Verify the customer concern.

2 . Visually inspect for obvious signs of electrical damage.

Visual Inspection Chart

Mechanical

Electrical

•

Seat Movement Mechanism

•

Seat Movement Motor

•

Center Console or Seat Control
Switchpack

•

Fuses/Relays

•

Damaged, Loose or Corroded Connector(s)

•

Damage to Wiring Loom/Incorrect Location,
Stretched or Taught

1 . If an obvious cause for an observed or reported concern is found, correct the cause (if
possible) before proceeding to the next step.

2 . If the cause is not visually evident, verify the symptom and refer to the Symptom Chart
below, alternatively, check for Diagnostic Trouble Codes (DTC) and refer to DTC Index.

Symptom Chart

Symptom

Possible Cause

Action

No driver seat movement
from driver switch-pack
(including no memory
recall).

•

Driver Seat Module
has gone into sleep
mode.

Switch ignition ON. Check seat
functions from switch packs.

No driver seat axis or driver

•

No power or ground

Check fuse. Check power/ground

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lumbar movement from
driver switch-pack.

to driver seat switch-
pack.

circuits.

No driver seat axis or driver
lumbar movement from
driver switch-pack.

•

No power or ground
to driver seat module.

Check DSM power fuses and
power/ground circuits, refer to
circuit diagram.

No individual driver seat
axis movement
(headrest/rear
height/squab/front
height/cushion
extend/slide/lumbar) from
driver seat switch-pack.

•

Switch-pack open
circuit.

Check switch-pack wiring. Refer
to circuit diagram.

No individual driver seat
axis movement
(headrest/rear
height/squab/front
height/cushion
extend/slide/lumbar) from
driver seat switch-pack.

•

Switch-pack short
circuit to power.

Check for DSM DTC B2147,
fault PID A103 indicates affected
axis.

No memory recall function
however driver seat axis
and driver seat lumbar
functions correctly.

•

DDM (Driver Door
Module).

With ignition in RUN press
memory set button (M button, the
red LED should light up for 5
seconds), during this 5 second
period if a 1, 2 or 3 button is
pressed to save a memory
position a chime should be heard
and the LED extinguished. If this
does not happen check the
following, Check for DDM DTC
B1529 Memory Set Switch
Circuit Short To Power. Check
for DDM DTC B1530 Memory
Set Switch Circuit Short To
Ground. Check for DDM DTC
B2084 Memory Set Indicator
Short To Ground for switch-pack
connectivity issues. Check the
SCP connections between the
DDM and the Instrument cluster
and Driver Seat Module.

No memory recall or
memory save operations at
all however driver seat axis
and driver seat lumbar
functions correctly.

•

DDM power/ground
connectivity issue.

Check DDM logic/power/ground
circuits. Refer to circuit diagram.

No seat memory recall or
save function however

•

DSM SCP

Check SCP bus is connected to
DSM. Refer to circuit diagram.

driver seat axis and driver
seat lumbar functions
correctly.

connectivity issue.

No seat memory recall
function however memory
save function appears to be
ok and driver seat axis and
driver seat lumbar functions
correctly.

•

A seat axis has gone
out of calibration.

Check for DSM DTC A309. Fault
PID A106 will indicate affected
axis. If DTC A309 is present the
affected axis has gone out of
calibration. Therefore run the
Driver Seat recalibration routine
via IDS. Note, always ignore
DSM DTC 9940 and do not
recalibrate when this DTC is
detected.

Easy Entry Exit does not
function at all.

•

Easy Entry Exit not
enabled via column
adjust switch.

Turn the column adjust switch to
Auto position to enable Easy
Entry Exit.

Easy Entry Exit does not
function on the Driver Seat,
either on the Height axis or
the Fore/Aft axis (or both).
But it does function on the
Steering column.

•

Either the Driver Seat
Fore/Aft axis or the
Driver Seat Height
axis has gone out of
calibration.

A Driver Seat axis
repeatedly goes out of
calibration even after an
IDS Driver Seat re-
calibration. The affected
axis can be identified from
DTC A309 in conjunction
with fault PID A106.

•

Incorrect Driver Seat
Module fitted to the
X358 vehicle. X358
XJ vehicles are fitted
with new Driver Seat
which has longer axis
lengths. Therefore
correct Driver Seat
Module needs to be
fitted to these new
seats.

Ensure that the following Driver
Seat Modules are fitted to X358
XJ Driver X358 DSM part
numbers 8 way DSM 8W9F-
14C708-DH 10 way DSM 8W9F-
14C708-AH 12 way DSM 8W9F-
14C708-CH DSM part number
(pre- X358) 8 way DSM 2W9F-
13C789-DH 10 way DSM 2W9F-
13C789-AH 12 way DSM 2W9F-
13C789-CH Note to Service, the
X358 DSMs listed above can be
fitted to pre X358 XJ Memory
Driver Seats (X350) and S Type
Memory Driver Seats (2002.5MY
onwards). These later DSMs are
therefore backward compatible
however older DSMs part
numbers listed above (pre-X358)
can not be fitted to the new X358
XJ memory Driver Seats.

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