seats JAGUAR XFR 2010 1.G Owner's Manual

7 Front seat climate control module 8 Passenger seat squab climate module 9 Drivers seat cushion climate module 10 Passenger seat cushion climate module 11 Drivers seat squab climate module 12 Passenger seat cushion heater element 13 Passenger seat squab heater element 14 Drivers seat cushion heater element 15 Drivers seat squab heater element 16 CJB


HEATED SEATS - OPERATION

Heated Front Seats System Operation

The TSD receives a fused power supply from the RJB. One of the 3 seat heat temperature selections made by the driver or passenger using the TSD soft keys are passed from the TSD on the MOST ring to the Information and Entertainment module.
The information and entertainment module processes the information and transmits the request on the medium speed CAN bus to the ATC module.
The cushion heaters have a thermal sensor which supplies a feed back signal back to the CJB. The squab heater elements do not have a thermal sensor and are maintained at the same temperature as the seat cushion elements.

The ATC module reacts to the driver request information received from the information and entertainment module and requests the CJB to activate the seat heaters. The CJB measures the returned temperature signals from the thermal sensors and relays the temperature signals back to the ATC module. The ATC module then uses the measured seat element temperatures to provide closed-loop control of the heater elements to maintain the temperature at one the 3 heat ranges selected.


NOTE: To prevent excessive battery discharge, the heated front seats will only operate when the engine is running.

Heated and Cooled Front Seats

The TSD receives a fused power supply from the RJB. Selections made by the driver using the TSD soft keys are passed from the TSD on the MOST ring to the Information and Entertainment module. The information and entertainment module processes
the information and transmits the request on the medium speed CAN bus to the front seat climate control module. The front seat climate control module is located beneath the RH (right-hand) front seat, on the floor cross member.

The front seat climate control module receives its power supplies from the CJB. Heating and cooling requests are generated using the soft buttons on the TSD. These requests are transmitted to the information and entertainment module over the
MOST ring. The Information and Entertainment module forwards these requests to the front seat climate control module over
the medium speed CAN bus.
The front seat climate control module supplies power to the two climate modules in each seat. The temperature sensor in each
climate module is monitored by the front seat climate control module which uses the temperature information to control the
Peltier cells accordingly and also the blower fans to distribute the heated or cooled air.


NOTE: To prevent excessive battery discharge, the heated and cooled front seats will only operate when the engine is
running.
Electric Driver's Seat Adjustment - Non-Memory Seats

The CJB supplies 3 power supplies to the driver's seat switchpack. The fused supplies provide power for the seat height and squab recline, the seat slide and seat tilt and the lumbar adjustment respectively. The CJB only provides the power to the driver's seat switch pack when the ignition is on (power mode 6).

For the seat movement motors, when the applicable switch is operated, the power is supplied to the applicable side of the
motor and the ground path is completed to operate the motor in the required direction. To move the motor in the opposite
direction the polarity is reversed.

For the lumbar adjustment, when the switch is operated in the inflate position, power is supplied to the pump motor to inflate
the lumbar support. When the switch is operated in the opposite direction, the power energizes a solenoid which in turn opens
a valve to deflate the lumbar support.
Electric Passenger Seat Adjustment ( 8, 10 and 12 way)

The CJB supplies 3 power supplies to the passenger seat switchpack. The fused supplies provide power for the seat height and squab recline, the seat slide and seat tilt and the head restraint and lumbar adjustment respectively. The CJB only provides the power to the passenger seat switch pack when the ignition is on (power mode 6).

For the seat movement and head restraint motors, when the applicable switch is operated, the power is supplied to the
applicable side of the motor and the ground path is completed to operate the motor in the required direction. To move the

supplies provide power for the movement motors in addition to the driver's seat switch pack. Power is only supplied to the
driver's seat module and the driver's seat switch pack when the ignition is on (power mode 6).

The driver's seat switch pack is connected to the driver's seat module by a LIN bus for the seat movement switches. Any selection for seat movement generates a message which is passed via the LIN to the driver's seat module. The seat module processes the request and operates the applicable seat function as required using the power supplies from the CJB.
Each seat motor contains a Hall position sensor. The sensor sends a feedback signal to the driver's seat module. The signal is
used for memory store and memory recall functions.

The lumbar adjustment switch on the driver's seat switch pack is wired direct to the lumbar pump and solenoids. The switch,
when moved to the inflate position for either the upper or lower inflatable cushion cell, provides a power supply to the lumbar
pump and simultaneously activates the applicable inflate solenoid valve. When the switch is released the pump stops and the
solenoid valve closes trapping the air in the inflatable cushion. When the switch is moved to the deflate position for either the
upper or lower inflatable cushion cell, power is supplied to the applicable deflate solenoid valve which opens to allow the air in
the cushion to escape. When the switch is released, the valve is closed and the remaining air in the cushion is retained.



FRONT SEATS - DESCRIPTION Component Description

The table below highlights the features available for each seating option.

Seat Type Non-Heated Heated Heated and Cooled Lumbar Support Memory 8-way Yes Optional No 2-way No 10-way Yes Optional Optional 2-way Optional (Driver's seat only) 12-way No No Yes 4-way No 16-way No No Yes 4-way Yes (Driver's seat only) Seat Heating

The 3-stage heated front seats feature 2 heater elements located in the seat cushion and a single heater element located in
the seat squab. Operation of the heated front seats is controlled by the ATC module via the TSD, information and entertainment control module and the CJB module on vehicles with heated seats. On vehicles with heated and cooled seats the operation is controlled by the TSD, information and entertainment control module and the front seat climate control
module.

The heated and cooled front seats each contain 2 climate modules; one in the cushion, one in the squab. The climate modules
contain 'Peltier' cells which are able to deliver heating and cooling based on a voltage provided by the front seat climate
control module. Each climate module also contains a fan, which blows air over the Peltier cells to distribute heated or cooled
air via liners in the seat cushion and squab. The fan is also controlled by the front seat climate control module. The TSD allows
the driver and passenger to select 3 ranges of heated or cooled ventilation; off, minimum and intermediate. Also, using the
selections on the TSD, the driver and passenger can select between full seat ventilation or squab backrest ventilation only.

Vehicles fitted with the 3-stage heated front seat option also feature a heated steering wheel.
Refer to: Steering Column Switches (211-05 Steering Column Switches, Description and Operation).
Electric Seat Adjustment

Lumbar Support

On 8, 10 and 12 way seats, a 2 way lumbar support is provided which allows the lumbar inflatable cushion to be inflated or
deflated as required. On 16 way seats, a 4 way lumbar support is fitted which comprises two separate cushion cells. The upper
and lower cells can be inflated or deflated individually allowing greater comfort adjustment for the driver and passenger.

The lumbar support comprises an inflatable cushion located in the seat squab, a pump and solenoids. The pump is activated
when the applicable seat switch is moved to the inflate position, inflating the cell(s) in the inflatable cushion. On 8 and 10
way seats, a single solenoid operated valve allows the inflatable cushion to be deflated. On 12 and 16 way seats, 4 solenoid
valves control the inflation and deflation of the upper and lower inflatable cushion cells, allowing each cell to be adjusted
individually.
Seat Motors

The head restraint motor is located in the upper section of each seat squab and is accessible by removal of the seat back. The
motor moves a cradle which is driven in a vertical motion by a rack and pinion arrangement. The cradle has the two head
restraint stems attached to it and therefore raises and lowers the head restraint as the motor moves the cradle. The motor
contains a Hall sensor which supplies positional information to the driver's seat module.

The seat slide motor is an integral component of the seat frame. The motor drives on a gear on a worm drive lead screw which
is integral with the floor rail. The lead screw has a stop at each end to limit the fore and aft seat movement.

memory positions to be stored and 'set' button with integral LED (light emitting diode). The seat, door mirror and steering
column motors have position sensors which provide feedback to driver's seat module.

Once the driver's seat, steering column and exterior mirrors have been adjusted, the vehicle is able to memorize these
settings for future use by using the following procedure:
Push the memory 'SET' button, the LED in the switch will illuminate Press the memory button 1 or 2 to memorize the current settings. The LED will extinguish, and a chime will sound to confirm that the settings have been memorized. If the ignition is on, power mode 6, the message center will display a
confirmation message.
The positions can be recalled by pressing the applicable button 1 or 2.
Stall Detection

Seat, steering column and mirror motors are deemed to have stalled if there is no change in the inputs that are received from
the corresponding feedback sensors for 200 ms (seat).

If a stall condition is detected then the drive to that motor is cancelled for the remainder of that memory operation (memory
recall) or until the switch is re-selected (manual movement).

If the motor movement has stopped due to loss of sensor feedback, either stall or sensor failure, then that motor may be
activated again, to move past the stall position, by re-selecting the appropriate switch and pressing for longer than 2 seconds.
This allows control of the motor to be maintained if sensor feedback is lost.

Upon re-selection of movement, if sensor pulses are detected then the motor will continue to be driven until the switch is
released or another stall condition is detected. If sensor feedback is not detected then the motor is only driven for 0.5 second
and then stops until the switch is released and then pressed again, when a further 0.5 second of activation is permitted, and
so on, this is known as inch mode.

For all seat motor manual movements, whenever a motor is driven and a stall occurs, the memory control module records the
position at which the stall occurred. If movement occurs beyond a stall position, then that position is erased from the control
modules memory. This will always allow movement past a previously recorded stall position once movement has been
registered beyond that position. This is the case for both manual and memory movement.
Initialization

When a replacement driver's seat module is fitted, it should be calibrated a Jaguar approved diagnostic system so that the
module can learn the seats absolute position.
Battery Monitor

If the battery voltage drops below 10.5 Volts, then the driver's seat module ignores all requests for a memory recall until the
battery voltage has reached 11.5 Volts. This will conserve as much power in the vehicle battery as possible to enable engine
cranking.

REAR SEATS - DESCRIPTION

The rear seat features a single piece cushion and a 60/40 split squab. Two latches are secured to the rear bulkhead by a pair
of M8 bolts to retain the seat squabs in the upright position. The latches can be released to fold down the individual cushions
by pulling a cable release located below the rear window parcel shelf in the luggage compartment.
ISOFIX fastening points are attached to the vehicle floor to provide secure fastening for compatible child seats.

A centrally mounted center arm rest can be folded down from the 60% squab. The arm rest contains two drinks holders.

Seating - Seats
Diagnosis and Testing

Principle of Operation Published: 18-Apr-2013

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

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


CAUTION: Diagnosis by substitution from a donor vehicle is NOT acceptable. Substitution of control modules does not
guarantee confirmation of a fault, and may also cause additional faults in the vehicle being tested and/or the donor vehicle.


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 damage and system integrity.

Visual Inspection
Mechanical Electrical
Security, condition and correct installation of seat components and fixings
Fuses
Harnesses for damage/corrosion
Electrical connectors
Damaged/corroded pins
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, verify the concern and refer to the Symptom Chart, alternatively, check for
Diagnostic Trouble Codes (DTCs) and refer to the DTC Index.

5. Check DDW for open campaigns. Refer to the corresponding bulletins and SSM's which may be valid for the specific
customer complaint and carry out the recommendations as needed.

Symptom Chart

Symptom Possible Cause Action No seat movement from switch pack
(including no memory recall)
Seat module has
gone into sleep
mode
Seat switch pack
LIN, power or
ground circuit -
open circuit
Seat switch pack
LIN circuit - short
to power, ground Set ignition ON. Re-check seat function from switch pack.
Check for DTC B1A9887 and refer to DTC Index. Check for
DTC B1A9888 and refer to DTC Index No seat movement or lumbar movement
from switch pack (including no memory
recall)
NOTE: Seat module
does not control the seat
lumbar function

Seat switch pack
power or ground
supply circuits -
open circuit Refer to the electrical circuit diagrams and check seat
switch pack power and ground supply circuits for open
circuit Seat movement and lumbar movement
from switch pack is ok, however, no recall
from memory switch pack
Seat switch pack to
memory switch
pack circuits -
short, open circuit
NOTE: Memory switch pack is separate switch
hardwired to seat adjust switch

Refer to the electrical circuit diagrams and check seat
switch pack to memory switch pack circuits for short,

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).

Seating - Seats Vehicles With: Climate Controlled Seats
Diagnosis and Testing

Principle of Operation Published: 16-Apr-2014

For a detailed description of the seating systems and operation, refer to the relevant description and operation section of the
workshop manual. REFER to: (501-10 Seating)

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


CAUTION: Diagnosis by substitution from a donor vehicle is NOT acceptable. Substitution of control modules does not
guarantee confirmation of a fault and may also cause additional faults in the vehicle being checked and/or the donor vehicle
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, or determine if any prior approval programme is in operation, prior to the installation
of a new module/component


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


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


The DTC index containing an actions list is for guidance only any reference to “check and install new blower unit” should
only be carried out following failure confirmation using the pin out diagnostics and/or the over temperature and fluid/air leak
diagnostics contained below. The recording of a DTC does NOT signify a permanently failed unit


The climate system functions in a manner that means any detected error state either intermittent or permanent will shut
down the complete seat climate system until the next ignition cycle, this does not mean that both climate units within the one
seat have failed. This shut down is design intent to protect the system to ensure that the fault detected does not damage the
units, it is possible that both units are functioning correctly and that the fault lies elsewhere within the system. The following
process can be carried out without removing either the seats or the climate units from the vehicle and should correctly identify
any failed units, this should ensure that only failed units are changed under warranty. Any units exhibiting the correct reading
as per process below, should NOT be changed under warranty. If all units have a correct reading then re-confirm customer
symptom, if customer symptom is still present then carry out further system checks
1. Verify the customer concern

2. Visually inspect for obvious signs of mechanical or electrical damage

Visual Inspection
Mechanical Electrical
Seat heater switch condition and installation
Battery condition and state of charge
Fuses
Harnesses and connectors
Seat heater switch(es)
Seat heater elements
Seat module(s)
Ignition switch
Battery junction box
Central junction box
LIN circuit
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, carry out normal dealer warranty process, perform on-demand self test, check for
DTCs and refer to the relevant DTC index

5. Allow 30 mins since the last seat/cooled operation prior to carrying out pin testing detailed below in the section
"Connector and Pin Information"

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