2010 JAGUAR XFR sensor

Symptom Possible Cause Action open circuit Seat movement and memory recall works
correctly however seat lumbar is not
working correctly
NOTE: Seat module
does not control the seat
lumbar function

Seat movement
switch to lumbar
circuits - short,
open circuit Refer to the electrical circuit diagrams and check seat
movement switch to lumbar circuits for short, open
circuit Seat movement from switch pack occurs
in delayed inch mode (seat axis moves
short distance when switch pressed for
longer than 2 seconds and then stops). This behaviour could occur on any seat
axis (slide, height, squab, tilt, headrest
or cushion) when requested
Motor Hall sensor
on affected axis is
not connected or
not receiving
expected signals Check for DTCs, B1B8731, B1B9131, B1B8931, B1B9331,
B106331, B106431. If present then check Hall sensor
feedback circuits between seat motor and seat module
and also check Hall sensor ground circuits for affected
axis. These DTCs are only logged if the axis is
attempted to be moved in both directions. When hall
sensor connection issue fixed press switch on affected
axis for longer than 2 seconds. By keeping the switch
pressed the axis movement should now operate for the
duration of switch-press. Re-calibrate affected seat Seat movement from switch pack occurs
in inch mode. When seat axis movement
is requested from the seat switch pack
the requested seat axis moves a short
distance then stops (does not include
lumbar). This behaviour will occur on ALL
seat axis (slide, height, squab, tilt
headrest and cushion) when requested.
MS CAN communication not possible
MS CAN fault Carry out CAN network integrity test using manufacturer
approved diagnostic system Seat movement from switch pack occurs
in inch mode. When seat axis movement
is requested from the seat switch pack
the requested seat axis moves a short
distance then stops (does not include
lumbar). This behaviour will occur on ALL
seat axis (slide, height, squab, tilt
headrest and cushion) when requested.
MS CAN communication not possible
Seat module is
disconnected from
the CAN Bus Check for Instrument Cluster DTC U020800 'Lost
Communication With Seat Module'. If this DTC is
present, refer to the electrical circuit diagrams and check
seat module power and ground supplies for short, open
circuit. Carry out CAN network integrity tests using the
manufacturer approved diagnostic system Seat movement from switch pack occurs
in inch mode. When seat axis movement
is requested from the seat switch pack
the requested seat axis moves a short
distance then stops (does not include
lumbar). This behaviour will occur on ALL
seat axis (slide, height, squab, tilt
headrest and cushion) when requested.
MS CAN communication not possible
Instrument cluster
is disconnected
from the CAN Bus Check for seat module DTC U015500 'Lost
Communication With Instrument Cluster'. If this DTC is
present, refer to the electrical circuit diagrams and check
instrument cluster power and ground supplies for short,
open circuit. Carry out CAN network integrity tests using
the manufacturer approved diagnostic system Seat movement from switch pack occurs
in inch mode. When seat axis movement
is requested from the seat switch pack
the requested seat axis moves a short
distance then stops (does not include
lumbar). This behaviour will occur on ALL
seat axis (slide, height, squab, tilt
headrest and cushion) when requested.
MS CAN communication not possible
Driver Door Module
is disconnected
from the CAN Bus Check for seat module DTC U019900 'Lost
Communication With Driver Door Module'. If this DTC is
present, refer to the electrical circuit diagrams and check
driver door module power and ground supplies for short,
open circuit. Carry out CAN network integrity tests using
the manufacturer approved diagnostic system Seat movement from switch pack occurs
in inch mode. When seat axis movement
is requested from the seat switch pack
the requested seat axis moves a short
distance then stops (does not include
lumbar). This behaviour will occur on ALL
seat axis (slide, height, squab, tilt
headrest and cushion) when requested.
MS CAN communication not possible
Rear Junction Box
(RJB) is
disconnected from
the CAN Bus Check for seat module DTC U014200 'Lost
Communication With RJB'. If this DTC is present, refer to
the electrical circuit diagrams and check RJB power and
ground supplies for short, open circuit. Carry out CAN
network integrity tests using the manufacturer approved
diagnostic system Seat movement from switch pack occurs
in inch mode. When seat axis movement
is requested from the seat switch pack
the requested seat axis moves a short
distance then stops (does not include
lumbar). This behaviour will occur on ALL
seat axis (slide, height, squab, tilt
headrest and cushion) when requested.
MS CAN communication not possible
Central Junction
Box (CJB) is
disconnected from
the CAN Bus Refer to the electrical circuit diagrams and check CJB
power and ground supplies for short, open circuit. Carry
out CAN network integrity tests using the manufacturer
approved diagnostic system www.JagDocs.com

Driver Seat Module
DTC Description Possible Cause Action B105F11
Seat Cushion
Extension Motor
Output
Driver seat cushion extension
motor circuit - short to ground Carry out any pinpoint tests associated with this DTC
using the manufacturer approved diagnostic system.
Refer to the electrical circuit diagrams and check driver
seat cushion extension motor circuit for short to ground B105F15
Seat Cushion
Extension Motor
Output
Driver seat cushion extension
motor circuit - short to power,
open circuit Carry out any pinpoint tests associated with this DTC
using the manufacturer approved diagnostic system.
Refer to the electrical circuit diagrams and check driver
seat cushion extension motor circuit for short to power, open circuit B106011
Seat Headrest Motor
Output
Driver seat headrest motor circuit
- short to ground Carry out any pinpoint tests associated with this DTC
using the manufacturer approved diagnostic system.
Refer to the electrical circuit diagrams and check driver
seat headrest motor circuit for short to ground B106015
Seat Headrest Motor
Output
Driver seat headrest motor circuit
- short to power, open circuit Carry out any pinpoint tests associated with this DTC
using the manufacturer approved diagnostic system.
Refer to the electrical circuit diagrams and check driver
seat headrest motor circuit for short to power, open
circuit B106331
Seat Cushion
Extension Motor
Speed/Position
Sensor
Harness/connector problem
No signal from sensor
Sensor/motor malfunction
Check the seat wiring harness/connectors for
security/integrity
Refer to the electrical circuit diagrams and check
the seat cushion motor sensor circuit. Repair
circuit as required. Clear DTC and retest B106431
Seat Headrest Motor
Speed/Position
Sensor
Harness/connector problem
No signal from sensor
Sensor/motor malfunction
Check the seat wiring harness/connectors for
security/integrity
Refer to the electrical circuit diagrams and check
the seat headrest motor sensor circuit. Repair
circuit as required. Clear DTC and retest B106524
Cushion extend
switch
Signal stuck high Check for a stuck switch. Refer to the electrical circuit
diagrams and check driver seat switch pack to seat
module LIN circuit for short, open circuit and cushion
extend circuit for short to ground B106624
Cushion retract
switch
Signal stuck high Check for a stuck switch. Refer to the electrical circuit
diagrams and check driver seat switch pack to seat
module LIN circuit for short, open circuit and cushion
retract circuit for short to ground B106D24 Headrest up switch
Signal stuck high Check for a stuck switch. Refer to the electrical circuit
diagrams and check driver seat switch pack to seat
module LIN circuit for short, open circuit and headrest up circuit for short to ground B106E24
Headrest down
switch
Signal stuck high Check for a stuck switch. Refer to the electrical circuit
diagrams and check driver seat switch pack to seat
module LIN circuit for short, open circuit and headrest
down circuit for short to ground B1A9883 LIN Bus Circuit #1
Value of signal protection
calculation incorrect Check LIN network for interference/EMC related issues B1A9886 LIN Bus Circuit #1
LIN bus Header error Carry out any pinpoint tests associated with this DTC
using the manufacturer approved diagnostic system.
Check LIN network for interference/EMC related issues B1A9887 LIN Bus Circuit #1
Slave node communication
missing. LIN bus circuit - short to
ground, power, open circuit (ECU
Types 7 & 8) Refer to electrical circuit diagrams and test LIN Bus
between seat switch pack and control module for short
to ground, power, open circuit, check power and ground
supplies to switch pack B1A9888 LIN Bus Circuit #1
Bus off Carry out any pinpoint tests associated with this DTC
using the manufacturer approved diagnostic system.
Refer to electrical circuit diagrams and test LIN Bus
between seat switch pack and control module for short
to ground or power B1B8611
Seat Height Motor
Relay
Driver seat parallel height motor
circuit - short to ground Carry out any pinpoint tests associated with this DTC
using the manufacturer approved diagnostic system.
Refer to the electrical circuit diagrams and check driver
seat parallel height motor circuit for short to ground B1B8615
Seat Height Motor
Relay
Driver seat parallel height motor
circuit - short to power, open
circuit Carry out any pinpoint tests associated with this DTC
using the manufacturer approved diagnostic system.
Refer to the electrical circuit diagrams and check driver
seat parallel height motor circuit for short to power, open circuit

DTC Description Possible Cause Action B1B8731
Seat Height Motor
Speed/Position
Sensor
Harness/connector problem
No signal from sensor
Sensor/motor malfunction
Check the seat wiring harness/connectors for
security/integrity
Refer to the electrical circuit diagrams and check
the seat height motor sensor circuit. Repair
circuit as required. Clear DTC and retest B1B8811
Seat Slide Motor
Relay
Driver seat slide motor circuit -
short to ground Carry out any pinpoint tests associated with this DTC
using the manufacturer approved diagnostic system.
Refer to the electrical circuit diagrams and check driver
seat slide motor circuit for short to ground B1B8815
Seat Slide Motor
Relay
Driver seat slide motor circuit -
short to power, open circuit Carry out any pinpoint tests associated with this DTC
using the manufacturer approved diagnostic system.
Refer to the electrical circuit diagrams and check driver
seat slide motor circuit for short to power, open circuit B1B8931
Seat Slide Motor
Speed/Position
Sensor
Harness/connector problem
No signal from sensor
Sensor/motor malfunction
Check the seat wiring harness/connectors for
security/integrity
Refer to the electrical circuit diagrams and check the seat slide motor speed sensor circuit. Repair circuit as required. Clear DTC and retest B1B9011
Seat Tilt Motor
Relay
Driver seat tilt motor circuit -
short to ground Carry out any pinpoint tests associated with this DTC
using the manufacturer approved diagnostic system.
Refer to the electrical circuit diagrams and check driver
seat tilt motor circuit for short to ground B1B9015
Seat Tilt Motor
Relay
Driver seat tilt motor circuit -
short to power, open circuit Carry out any pinpoint tests associated with this DTC
using the manufacturer approved diagnostic system.
Refer to the electrical circuit diagrams and check driver
seat tilt motor circuit for short to power, open circuit B1B9131
Seat Tilt Motor
Speed/Position
Sensor
Harness/connector problem
No signal from sensor
Sensor/motor malfunction
Check the seat wiring harness/connectors for
security/integrity
Refer to the electrical circuit diagrams and check
the seat tilt motor speed sensor circuit. Repair
circuit as required. Clear DTC and retest B1B9211
Seat Recline Motor
Relay
Driver seat recline motor circuit -
short to ground Carry out any pinpoint tests associated with this DTC
using the manufacturer approved diagnostic system.
Refer to the electrical circuit diagrams and check driver
seat recline motor circuit for short to ground B1B9215
Seat Recline Motor
Relay
Driver seat recline motor circuit -
short to power, open circuit Carry out any pinpoint tests associated with this DTC
using the manufacturer approved diagnostic system.
Refer to the electrical circuit diagrams and check driver
seat recline motor circuit for short to power, open
circuit B1B9331
Seat Recline Motor
Speed/Position
Sensor
Harness/connector problem
No signal from sensor
Sensor/motor malfunction
Check the seat wiring harness/connectors for
security/integrity
Refer to the electrical circuit diagrams and check
the seat recline motor speed sensor circuit.
Repair circuit as required. Clear DTC and retest B1B9424
Seat Height Up
Switch
Signal stuck high Check for a stuck switch. Refer to the electrical circuit
diagrams and check driver seat switch pack to seat
module LIN circuit for short, open circuit and seat height up circuit for short to ground B1B9524
Seat Height Down
Switch
Signal stuck high Check for a stuck switch. Refer to the electrical circuit
diagrams and check driver seat switch pack to seat
module LIN circuit for short, open circuit and seat height down circuit for short to ground B1B9624
Seat Slide Forward
Switch
Signal stuck high Check for a stuck switch. Refer to the electrical circuit
diagrams and check driver seat switch pack to seat
module LIN circuit for short, open circuit and seat slide
forward circuit for short to ground B1B9724
Seat Slide Backward
Switch
Signal stuck high Check for a stuck switch. Refer to the electrical circuit
diagrams and check driver seat switch pack to seat
module LIN circuit for short, open circuit and seat slide
backward circuit for short to ground B1B9824 Seat Tilt Up Switch
Signal stuck high Check for a stuck switch. Refer to the electrical circuit
diagrams and check driver seat switch pack to seat
module LIN circuit for short, open circuit and seat tilt up circuit for short to ground B1B9924
Seat Tilt Down
Switch
Signal stuck high Check for a stuck switch. Refer to the electrical circuit
diagrams and check driver seat switch pack to seat
module LIN circuit for short, open circuit and seat tilt
down circuit for short to ground

Seating - Heater Mats
Diagnosis and Testing

Principles of Operation Published: 12-Jun-2013

Heated seats incorporate heater elements in the cushion and the backrest of the seat. Each cushion heater element has a
thermal sensor, which supplies a feedback temperature signal to the related seat heater module. The backrest heater elements
do not have a thermal sensor, and are regulated at the same temperature as the cushion heater elements.

For a detailed description of the seat heater mat, refer to the relevant Description and Operation section in the workshop
manual. REFER to: (501-10)

Seats (Description and Operation),
Seats (Description and Operation),
Seats (Description and Operation).

Inspection and Verification

1. Verify the customer concern.
2. Visually inspect for obvious signs of mechanical or electrical damage.
Visual inspection
Mechanical Electrical Seat heater switches condition and installation Fuses
Harnesses and connectors
Seat heater module
Seat heater switches
Seat heater mat
3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to
the next step.
4. If the cause is not visually evident, check for Diagnostic Trouble Codes (DTC's) and refer to the DTC Index.
NOTES:


If the control module or a 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 programme is in operation, prior to
the installation of a new module/component.


Generic scan tools may not read the codes listed, or may read only five digit codes. Match the five digits from the scan
tool to the first five digits of the seven digit code listed to identify the fault (the last two digits give additional information
read by the manufacturer approved diagnostic system).


When performing electrical voltage or resistance tests, always use a digital multimeter (DMM) accurate to three decimal
places, and with an up-to-date calibration certificate. When testing resistance, always take the resistance of the DMM leads
into account.


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


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


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.


CAUTION: When probing connectors to take measurements in the course of the pinpoint tests, use the adaptor kit, part
number 3548-1358-00.
DTC Index

For a complete list of all diagnostic trouble codes that could be logged on this vehicle, please refer to section 100-00.
REFER to: Diagnostic Trouble Code (DTC) Index - DTC: Seat Module (Driver/Passenger/Rear Left/Rear Right) (100-00,
Description and Operation) /
Diagnostic Trouble Code (DTC) Index - DTC: Seat Climate Control Module (SCCM) (100-00, Description and Operation).

6. Locate climate seat module, (refer to Electrical Information - Electrical Reference Library, contained in TOPIx) for
guidance on how to gain access to the connector(s)
7. Locate and disconnect relevant connector prior to pin test

8. Using ohm-meter to probe each heat/cooled unit pins (at rear of connector), reading should achieve no greater than 10
ohms after 1 minute (initial fluctuations in readings may occur using ohm-meter, post 1 minute readings will have
stabilized)
Connector and Pin Information
X250 (All Model Years) Terminal ID 1 2 3 4 7 8 9 10 Climate Seat
Unit Location Right
Cushion Right Cushion
Right
Backrest Right
Backrest Left Cushion Left Cushion
Left
Backrest Left Backrest Wiring Colour -
Left Hand
Drive Vehicles GY-BU -
Grey/Blue BU - Blue BU-BN -
Blue/Brown WH - White YE-BU - Yellow/Blue BU-OG -
Blue/Orange GY-VT -
Grey/Violet WH-VT -
White/Violet Wiring Colour -
Right Hand
Drive Vehicles YE-BU - Yellow/Blue BU-OG -
Blue/Orange GY-VT -
Grey/Violet WH-VT -
White/Violet GY-BU -
Grey/Blue BU - Blue BU-BN -
Blue/Brown WH - White
1. If any unit reads greater than 10 ohms, replace only that defective unit

2. If all units read less than 10 ohms but faults are still suspected, do not replace any units. Refer to step 4 below

3. As a final check, when a faulty unit has been identified strip the seat to access unit connector, REFER to: Seats
(501-10, Removal & Installation) and re-check ohm reading to confirm greater than 10 ohms prior to removing unit

4. In cases where the above diagnostic routine does NOT identify a failed unit, please refer to "Over Temperature and
Fluid/Air Leak Diagnostics" below. Also check for any live technical service bulletins referring to the seat climate system

Seat Climate Control Module/Seat Climate Assembly - Further Diagnostics

In the event of suspected climate seat faults use the pinpoint tests detailed below
Connector Checks

First, check the integrity of the three seat climate control module harness connectors:

1. Disconnect each connector
2. Inspect each connector for cracks and breaks, replace as required

3. Check the integrity of connector terminals for bent terminals, backed-out or badly crimped wires. Rectify as required

4. Reconnect all connectors and retest. If seat climate functions are still faulty, note any DTCs that have been logged by
the seat climate control module(s) and refer to the table and pinpoint tests below:


DTC Logged Pinpoint Test Required
NOTE: Where DTCs are marked in bold, this means that there are two possible diagnostic processes that
may be applied to resolve these faults. Check the listings below to reference an alternative set of pinpoint
tests for these DTCs

B10B9-13 Blower Control - Circuit open B10B9-
4B Blower Control - Over temperature B1157-
13 Blower Control B - Circuit open B1157-4B
Blower Control B - Over temperature
B120E-4B Right Thermal Electric Device Control - Over temperature
B1224-4B Left Thermal Electric Device Control - Over temperature
B122A-11 Right Seat Cushion Blower Speed Sensor - Circuit short to ground
B122A-12 Right Seat Cushion Blower Speed Sensor - Circuit short to battery
B122B-11 Right Seat Back Blower Speed Sensor - Circuit short to ground
B122B-12 Right Seat Back Blower Speed Sensor - Circuit short to battery
B122C-11 Left Seat Cushion Blower Speed Sensor - Circuit short to ground
B122C-12 Left Seat Cushion Blower Speed Sensor - Circuit short to battery
B122D-11 Left Seat Back Blower Speed Sensor - Circuit short to ground
B122D-12 Left Seat Back Blower Speed Sensor - Circuit short to battery GO to Pinpoint
Test A.
NOTE: Where DTCs are marked in bold, this means that there are two possible diagnostic processes that
may be applied to resolve these faults. Check the listings below to reference an alternative set of pinpoint
tests for these DTCs
B120E-13 Right Thermal Electric Device Control - Circuit open GO to Pinpoint
Test B.

DTC Logged Pinpoint Test Required B120E-19 Right Thermal Electric Device Control - Circuit current above threshold
B1223-13 Right Seat Cushion Temperature Sensor - Circuit open
B1224-13 Left Thermal Electric Device Control - Circuit open
B1224-19 Left Thermal Electric Device Control - Circuit current above threshold
B1225-13 Right Seat Back Temperature Sensor - Circuit open
B1229-13 Left Seat Back Temperature Sensor - Circuit open
B1235-13 Left Seat Cushion Temperature Sensor - Circuit open
B120F-98 Left Seat Cushion - Component or system over temperature
B122E-98 Right Seat Cushion - Component or system over temperature
B122F-98 Right Seat Back - Component or system over temperature
B1230-98 Left Seat Back - Component or system over temperature
B1231-7A Right Seat - Fluid leak or seal failure
B1232-7A Left Seat - Fluid leak or seal failure GO to Pinpoint
Test C.
NOTE: Where DTCs are marked in bold, this means that there are two possible diagnostic processes that
may be applied to resolve these faults. Check the listings above to reference an alternative set of pinpoint
tests for these DTCs
B120E-4B Right Thermal Electric Device Control - Over temperature
B120E-13 Right Thermal Electric Device Control - Circuit open
B120E-19 Right Thermal Electric Device Control - Circuit current above threshold
B1223-13 Right Seat Cushion Temperature Sensor - Circuit open
B1224-4B Left Thermal Electric Device Control - Over temperature
B1224-13 Left Thermal Electric Device Control - Circuit open
B1224-19 Left Thermal Electric Device Control - Circuit current above threshold
B1225-13 Right Seat Back Temperature Sensor - Circuit open
B1229-13 Left Seat Back Temperature Sensor - Circuit open
B1235-13 Left Seat Cushion Temperature Sensor - Circuit open GO to Pinpoint
Test D.
PINPOINT TEST A : CLIMATE SEATS ASSEMBLY - BLOWER DIAGNOSTICS TEST
CONDITIONS DETAILS/RESULTS/ACTIONS A1: CLIMATE SEATS ASSEMBLY - BLOWER SPEED CONTROL CIRCUIT RESISTANCE CHECKS AT SEAT TO VEHICLE
CONNECTOR 1 Uncouple connector C3HS03C from the seat climate control module 2 Check the resistance of the climate seats blower speed control circuits at connector C3HS03C For right-side seat cushion blower, check resistance at pins 3 and 7
For right-side seat backrest blower, check resistance at pins 4 and 7
For left-side seat cushion blower, check resistance at pins 11 and 15
For left-side seat backrest blower, check resistance at pins 12 and 15 Is the resistance between 290 and 420 kilo-ohms? Yes
No circuit faults present. No further action
No
GO to A2. A2: CLIMATE SEATS ASSEMBLY - BLOWER POWER CIRCUIT RESISTANCE CHECKS AT SEAT CLIMATE ASSEMBLY
CONNECTOR 1 Locate the appropriate seat backrest/seat cushion climate assembly connector 2 Disconnect connector 3 Check the integrity of connector terminals for bent terminals, backed-out or badly crimped wires. Rectify as required 4 Check the resistance of the climate seats blower power circuits at the climate assembly connector, pins 2 and 4 Is the resistance between 290 and 420 kilo-ohms? Yes
GO to A3. No
Replace the seat climate assembly A3: CLIMATE SEATS ASSEMBLY - BLOWER SPEED CONTROL CIRCUIT RESISTANCE CHECKS AT SEAT CLIMATE
ASSEMBLY CONNECTOR 1 Check the resistance of the climate seats blower control circuits at the climate assembly connector, pins 4 and 7

PINPOINT TEST B : CLIMATE SEATS ASSEMBLY - THERMAL ELECTRIC DEVICE (TED) DIAGNOSTICS TEST
CONDITIONS DETAILS/RESULTS/ACTIONS B1: CLIMATE SEATS ASSEMBLY - TED SENSOR CIRCUIT RESISTANCE CHECKS AT SEAT TO VEHICLE CONNECTOR 1 Uncouple connector C3HS03B from the seat climate control module 2 Check the resistance of the climate seats TED sensor circuits at connector C3HS03B For right-side seat cushion TED sensor circuits, check resistance at pins 2 and 3
For right-side seat backrest TED sensor circuits, check resistance at pins 4 and 5
For left-side seat cushion TED sensor circuits, check resistance at pins 7 and 8
For left-side seat backrest TED sensor circuits, check resistance at pins 9 and 10 Is the resistance between 0.9 and 1.1 kilo-ohms? (Note: these values are based on an ambient temperature
of 22°C/72°F) Yes
No circuit faults present. No further action
No
GO to B2. B2: CLIMATE SEATS ASSEMBLY - TED SENSOR CIRCUIT RESISTANCE CHECKS AT SEAT CLIMATE ASSEMBLY
CONNECTOR 1 Locate the appropriate seat backrest/seat cushion climate assembly connector 2 Disconnect connector 3 Check the integrity of connector terminals for bent terminals, backed-out or badly crimped wires. Rectify as required 4 Check the resistance of the climate seats TED sensor circuits at the climate assembly connector, pins 5 and 8 (Green and Green wires) Is the resistance between 0.9 and 1.1 kilo-ohms? (Note: these values are based on an ambient temperature
of 22°C/72°F) Yes
GO to B3. No
Replace the seat climate assembly B3: CLIMATE SEATS ASSEMBLY - TED SUPPLY CIRCUIT OPEN CIRCUIT CHECKS AT SEAT CLIMATE ASSEMBLY
CONNECTOR 1 Check the TED supply circuits at the climate assembly connector, pins 1 and 3 (Blue and Yellow wires) for open circuit faults Is an open-circuit fault present? Yes
Replace the seat climate assembly
No
No internal circuit faults present. Check for circuit faults in wiring harness between seat climate control
module and climate seat assembly and replace as required
PINPOINT TEST C : CLIMATE SEATS ASSEMBLY - BLOWER AND DUCTING DIAGNOSTICS TEST
CONDITIONS DETAILS/RESULTS/ACTIONS C1: CLIMATE SEATS ASSEMBLY - BLOWER SPEED CONTROL CIRCUIT RESISTANCE CHECKS AT SEAT TO VEHICLE
CONNECTOR 1 Uncouple connector C3HS03C from the seat climate control module 2 Check the resistance of the climate seats blower speed control circuits at connector C3HS03C For right-side seat cushion blower, check resistance at pins 3 and 7
For right-side seat backrest blower, check resistance at pins 4 and 7
For left-side seat cushion blower, check resistance at pins 11 and 15
For left-side seat backrest blower, check resistance at pins 12 and 15 Is the resistance between 290 and 420 kilo-ohms?
Yes
No circuit faults present. No further action
No
GO to C2. C2: CLIMATE SEATS ASSEMBLY - BLOWER CIRCUIT RESISTANCE CHECKS AT SEAT CLIMATE ASSEMBLY CONNECTOR Is the resistance between 290 and 420 kilo-ohms?
Yes
No internal circuit faults present. Check for circuit faults in wiring harness between seat climate control
module and climate seat assembly and replace as required
No
Replace the seat climate assembly

1 Locate the appropriate seat backrest/seat cushion climate assembly connector 2 Disconnect connector 3 Check the integrity of connector terminals for bent terminals, backed-out or badly crimped wires. Rectify as required 4 Check the resistance of the climate seats blower circuits at the climate assembly connector, pins 2 and 4 (Violet and Black wires) Is the resistance between 290 and 420 kilo-ohms?
Yes
GO to C3. No
Replace the seat climate assembly C3: CLIMATE SEATS ASSEMBLY - BLOWER CONTROL CIRCUIT RESISTANCE CHECKS AT SEAT CLIMATE ASSEMBLY
CONNECTOR 1 Check the resistance of the climate seats blower control circuits at the climate assembly connector, pins 4 and 7 (Black and Purple wires) Is the resistance between 290 and 420 kilo-ohms?
Yes
No internal circuit faults present. Check for circuit faults in wiring harness between seat climate control
module and climate seat assembly and replace as required. If no harness faults are found, GO to C4. No
Replace the seat climate assembly C4: CLIMATE SEATS ASSEMBLY - BLOWER DUCTING INSPECTION 1 Check that the ducting is securely attached to the blower and thermal electric device 2 Check the ducting for holes, cuts or tears Is the ducting undamaged and securely attached to the blower and thermal electric device?
Yes
GO to C5. No
Replace the seat climate assembly C5: CLIMATE SEATS ASSEMBLY - EXHAUST AIRFLOW CHECKS 1 Check for blockages or restrictions at the thermal electric device exhaust vent Are blockages or restrictions present?
Yes
Rectify as required
No
GO to C6. C6: CLIMATE SEATS ASSEMBLY - BLOWER AIRFLOW CHECKS 1 Check for blockages or restrictions at the blower air intake 2 Check that the blower fan movement is not restricted Are there any air intake blockages or restrictions to the blower fan movement?
Yes
Rectify as required
No
No further action
PINPOINT TEST D : CLIMATE SEATS ASSEMBLY - THERMAL ELECTRIC DEVICE (TED) AND DUCTING
DIAGNOSTICS TEST
CONDITIONS DETAILS/RESULTS/ACTIONS D1: CLIMATE SEATS ASSEMBLY - TED SENSOR CIRCUIT RESISTANCE CHECKS AT SEAT TO VEHICLE CONNECTOR 1 Uncouple connector C3HS03B from the seat climate control module 2 Check the resistance of the climate seats TED sensor circuits at connector C3HS03B For right-side seat cushion TED sensor circuits, check resistance at pins 2 and 3
For right-side seat backrest TED sensor circuits, check resistance at pins 4 and 5
For left-side seat cushion TED sensor circuits, check resistance at pins 7 and 8
For left-side seat backrest TED sensor circuits, check resistance at pins 9 and 10 Is the resistance between 0.9 and 1.1 kilo-ohms? (Note: these values are based on an ambient temperature
of 22°C/72°F)
Yes
No circuit faults present. No further action
No
GO to D2. D2: CLIMATE SEATS ASSEMBLY - TED SENSOR CIRCUIT RESISTANCE CHECKS AT SEAT CLIMATE ASSEMBLY
CONNECTOR 1 Locate the appropriate seat backrest/seat cushion climate assembly connector 2 Disconnect connector 3 Check the integrity of connector terminals for bent terminals, backed-out or badly crimped wires. Rectify as required www.JagDocs.com