Seat System Cadillac XLR I

Fastener Tightening Specifications

Fastener Tightening Specifications

Scheme 1

Scheme 2

Scheme 3

Scheme 4

Scheme 5

Scheme 6

Scheme 7

Scheme 8

Scheme 9

Scheme 10

Scheme 11

Scheme 12

Scheme 13

Power Seat Connector End Views

Climate Control Seat Module - Driver C1

Scheme 14

Power Seat Connector End Views

Climate Control Seat Module - Driver C2

Climate Control Seat Module - Passenger C1

Power Seat Connector End Views

Climate Control Seat Module - Passenger C1

Climate Control Seat Module - Passenger C2

Power Seat Connector End Views

Climate Control Seat Module - Passenger C2

Scheme 15

Power Seat Connector End Views

Heated/Cooled Seat Blower Motor - Driver

Heated/Cooled Seat Blower Motor - Passenger

Power Seat Connector End Views

Heated/Cooled Seat Blower Motor - Passenger

Scheme 16

Power Seat Connector End Views

Lower Lumbar Switch - Driver

Lower Lumbar Switch - Passenger

Power Seat Connector End Views

Lower Lumbar Switch - Passenger

Scheme 17

Power Seat Connector End Views

Lumbar Pump/Control Module Assembly - Driver

Lumbar Pump/Control Module Assembly - Passenger

Power Seat Connector End Views

Lumbar Pump/Control Module Assembly - Passenger

Scheme 18

Power Seat Connector End Views

Memory Seat Module - Driver C1

Scheme 19

Power Seat Connector End Views

Memory Seat Module - Driver C2

Scheme 20

Power Seat Connector End Views

Memory Seat Module - Driver C3

Scheme 21

Power Seat Connector End Views

Memory Seat Switch

Scheme 22

Power Seat Connector End Views

Seat Adjuster Motor Assembly - Driver C1

Scheme 23

Power Seat Connector End Views

Seat Adjuster Motor Assembly - Driver C2

Seat Adjuster Motor Assembly - Driver C3

Power Seat Connector End Views

Seat Adjuster Motor Assembly - Driver C3

Seat Adjuster Motor Assembly - Driver C4

Power Seat Connector End Views

Seat Adjuster Motor Assembly - Driver C4

Seat Adjuster Motor Assembly - Front Passenger

Power Seat Connector End Views

Seat Adjuster Motor Assembly - Front Passenger

Scheme 24

Power Seat Connector End Views

Seat Adjuster Switch - Driver

Seat Adjuster Switch - Front Passenger

Power Seat Connector End Views

Seat Adjuster Switch - Front Passenger

Scheme 25

Power Seat Connector End Views

Seat Back Heated/Cooled Ventilation Module - Driver

Seat Back Heated/Cooled Ventilation Module - Passenger

Power Seat Connector End Views

Seat Back Heated/Cooled Ventilation Module - Passenger

Seat Cushion Heated/Cooled Ventilation Module - Driver

Power Seat Connector End Views

Seat Cushion Heated/Cooled Ventilation Module - Driver

Seat Cushion Heated/Cooled Ventilation Module - Passenger

Power Seat Connector End Views

Seat Cushion Heated/Cooled Ventilation Module - Passenger

Scheme 26

Power Seat Connector End Views

Seat Recline Motor - Driver C1

Scheme 27

Power Seat Connector End Views

Seat Recline Motor - Driver C2

Scheme 28

Power Seat Connector End Views

Seat Recline Motor - Front Passenger

Upper Lumbar Switch - Driver

Power Seat Connector End Views

Upper Lumbar Switch - Driver

Upper Lumbar Switch - Passenger

Power Seat Connector End Views

Upper Lumbar Switch - Passenger

Diagnostic Code Index

DIAGNOSTIC CODE INDEX

Diagnostic Starting Point - Seats

Always begin the diagnosis by reviewing the system Description and Operation. Reviewing the Description and Operation will help you determine the correct symptom diagnostic procedure. when a malfunction exists. Reviewing the Description and Operation will also help you determine if the condition described by the customer is normal operation.

For power seats without memory (A45), refer to Symptoms - Seats in order to identify the correct procedure for diagnosing the system and were the procedure is located.

For seats with memory (A45) and heated/cool seats, begin diagnosis with the Diagnostic System Check - Vehicle in Vehicle DTC Information. The Diagnostic System Check will provide the following information

1. The identification of the control modules which command the system.
2. The ability of the control modules to communicate through the serial data circuit.
3. The identification of any stored diagnostic trouble codes and their status.

The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located.

Scan Tool Output Controls

Seats

Scan Tool Data List

Seats

Circuit Description

Battery positive voltage is supplied to the memory seat module (MSM)/driver position module (DPM) from the Seats Circuit Breaker located in the instrument panel (I/P) fuse block. When commanded, this voltage is used by the MSM/DPM to power the seat motors through the motor control circuits. During memory recall functions and manual seat functions, the driven motor current is monitored through the motor control circuits by the MSM/DPM. When an overcurrent condition is detected, the MSM/DPM disables the seat motors in order to protect the internal MSM/DPM circuitry.

DTC Descriptor

This diagnostic procedure supports the following DTC

DTC B1336 Device Power 3 Circuit Range/Performance

Conditions for Running the DTC

The MSM/DPM monitors for overcurrent only when the seat motors are active.

Conditions for Setting the DTC

The MSM/DPM will set DTC B1336 when the measured current exceeds 81 amps for 100 milliseconds.

Action Taken When the DTC Sets

1. All memory recalls in progress are aborted.
2. The MSM/DPM will not respond to manual movements of the affected motor.

Conditions for Clearing the DTC

The MSM/DPM does not detect an overcurrent condition during seat movement.

Diagnostic Aids

The MSM is also known as the DPM for this vehicle.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

1. 2: This test determines which directional motor exhibits excessive current.
2. 3: This test determines if the suspect motor has an internal short to ground.
3. 9: This test verifies the repair.

DTC B1336

Battery positive voltage is supplied at all times to the seat adjuster switch and the memory seat module (MSM)/driver position module (DPM) through the same circuit. The MSM/DPM uses this battery voltage input to determine if battery positive voltage is applied to the seat adjuster switch.

This diagnostic procedure supports the following DTC

DTC B1420 Device Voltage

The MSM/DPM must be powered and cannot have B1327 - Battery Voltage Low as an active DTC for this DTC to set.

This DTC will set only when the MSM/DPM detects less than 3 volts from the circuit.

1. Current and history codes are set.
2. The MSM/DPM ignores all memory recall commands.
3. All manual seat functions will operate.

1. The DTC will clear when the MSM/DPM detects that the voltage from the circuit is greater than 3 volts.
2. The MSM/DPM will clear the history DTC after 50 fault free ignition cycles.

The MSM is also known as the DPM for this vehicle.

DTC B1420

When the power seat switches are pressed they send a 12-volt signal through the switch signal circuit to the memory seat module (MSM)/driver position module (DPM). The MSM/DPM then commands the driver seat to move in response to the switch inputs.

DTC Descriptors

This diagnostic procedure supports the following DTCs

1. DTC B1735 Seat Front Up Switch Circuit
2. DTC B1740 Seat Front Down Switch Circuit
3. DTC B1745 Seat Rear Up Switch Circuit
4. DTC B1750 Seat Rear Down Switch Circuit
5. DTC B1755 Seat Assembly Horizontal Forward Switch Circuit
6. DTC B1760 Seat Assembly Horizontal Rearward Switch Circuit
7. DTC B1815 Seat Recline Forward Switch Circuit
8. DTC B1820 Seat Recline Rearward Switch Circuit

The MSM/DPM must be powered and cannot have B1327 - Battery Voltage Low as an active DTC for this DTC to set.

1. If a seat switch continues to be active for 30 seconds after a motor controlled by that switch reaches the end of its travel, the switch will be considered shorted and the MSM/DPM will set a switch DTC.
2. If a position sensor DTC is current and the associated switch is active for 30 continuous seconds, the switch will be considered shorted and the MSM/DPM will set a switch DTC.

1. Current and history codes are set.
2. A motor output driven in response to a switch considered failed, is deactivated for both directions.
3. All memory recall commands and class 2 Driver Identifier are ignored.
4. The MSM/DPM will respond to any other switch signal that has not set a DTC.

1. The DTC automatically clears when the switch circuit setting the DTC is no longer active.
2. The MSM/DPM will clear the history DTC after 50 fault free ignition cycles.

The MSM is also known as the DPM for this vehicle.

The numbers below refer to the step numbers on the diagnostic table.

1. 2: Checks the existing state of the driver's seat switch by using the current state of the seat switch parameter. If all of the seat switch parameters display active, possibly one of the seat switch signal circuits is shorted to voltage.
2. 4: When the seat switch is disconnected, this step determines if the seat switch contacts are stuck closed, or if one of the switch signal circuits is possibly shorted to battery voltage.

DTC B1735, B1740, B1745, B1750, B1755, B1760, B1815, or B1820

The position sensor that sets this DTC is attached to the seat directional motor. It receives a 5-volt reference and low reference from the memory seat module (MSM)/driver position module (DPM). The sensor sends a voltage signal that varies with the movement of the seat through the signal circuit to the MSM/DPM. Then based on this voltage signal, the MSM/DPM determines the position of the seat.

This diagnostic procedure supports the following DTCs

1. DTC B1825 Seat Recline Position Sensor Circuit
2. DTC B2355 Seat Front Vertical Position Sensor Circuit
3. DTC B2365 Seat Rear Vertical Position Sensor Circuit
4. DTC B2375 Seat Assembly Horizontal Position Sensor Circuit

The MSM/DPM must be powered and cannot have B1327 - Battery Voltage Low as an active DTC for this DTC to set.

If the MSM/DPM sees the voltage signal from this sensor as either lower than 0.25 volts or higher than 4.75 volts, the sensor will be considered out of range and the MSM/DPM will set this DTC.

1. Current and history codes are set.
2. The MSM/DPM disables the affected motor during memory recall operations.
3. The affected motor will respond to manual positioning commands.

1. The MSM/DPM will clear the DTC when it detects that the voltage from the sensor signal circuit is between 0.25-4.75 volts.
2. The MSM/DPM will clear the history DTC after 50 fault free ignition cycles.

1. The MSM is also known as the DPM for this vehicle.
2. All position sensors use common low reference and 5-volt reference circuits.
3. If the 5-volt reference circuit is shorted to voltage multiple codes will set.
4. If the 5-volt reference circuit is shorted to ground multiple codes will set.
5. If the sensor low reference circuit is open multiple codes will set.

The numbers below refer to the step numbers on the diagnostic table.

1. 3: Tests for the proper operation of the circuit in the low voltage range.
2. 4: Tests for the proper operation of the circuit in the high voltage range. If the fuse in the jumper opens when you perform this test, the signal circuit is shorted to ground.
3. 5: Tests for a short to voltage in the 5-volt reference circuit.
4. 6: Tests for a high resistance or an open in the sensor low reference circuit.
5. 16: This step verifies the repair.

DTC B1825, B1850, B2355, B2365, or B2375

The sensor that set this diagnostic trouble code (DTC) is attached to the seat directional motor it monitors. It receives a 5-volt reference and low reference from the memory seat module (MSM)/driver position module (DPM). The sensor sends a voltage signal that varies with the movement of the seat through the sensor signal circuit to the MSM/DPM. Then based on this voltage signal, the MSM/DPM determines the position of the seat.

This diagnostic procedure supports the following DTCs

1. DTC B1826 Seat Recline Position Sensor Circuit Range/Performance
2. DTC B2356 Seat Front Vertical Position Sensor Circuit Range/Performance
3. DTC B2366 Seat Rear Vertical Position Sensor Circuit Range/Performance
4. DTC B2376 Seat Assembly Horizontal Position Sensor Range/Performance

1. The MSM/DPM must be powered and cannot have B1327 - Battery Voltage Low set as a current DTC for this DTC to set.
2. This test will run only when the motors are active.

If the sensor signal received by the MSM/DPM from a motor being driven in a commanded direction changes by more than 10 counts or 0.2 volts in the wrong direction, the MSM/DPM will set this DTC.

1. Current and History codes are set.
2. The MSM/DPM disables the affected motor during memory recall operations.
3. The affected motor will respond to manual positioning commands.

1. The MSM/DPM will clear the DTC as an active DTC, whenever a manual switch is activated and the MSM/DPM senses that the voltage from the sensor signal changes by more than 2 counts or 0.04 volts in the correct direction.
2. The MSM/DPM will clear the history DTC after 50 fault free ignition cycles.

1. The MSM is also known as the DPM for this vehicle.
2. All position sensors use common 5-volt reference and low reference circuits.

The numbers below refer to the step numbers on the diagnostic table.

1. 2: This step checks the direction in which the volts change as the switch is activated. The voltage should increase for the forward or up position and decrease for the rearward or down position.
2. 4: This step checks the polarity of the seat position sensor wiring.
3. 5: This step checks the polarity of the seat motor wiring.
4. 6: This step checks the polarity of the seat switch wiring.

DTC B1826, B1851, B1861, B2356, B2366, or B2376

When the memory recall switches are pressed they send a 12-volt signal to the memory seat module (MSM)/driver position module (DPM). The MSM/DPM then commands the driver seat to move in response to the switch inputs.

This diagnostic procedure supports the following DTCs

1. DTC B2757 Memory 1 Select Switch Circuit Low
2. DTC B2762 Memory 2 Select Switch Circuit Low
3. DTC B2767 Memory Set Switch Circuit Low
4. DTC B2772 Memory Exit Switch Circuit Low

The MSM/DPM must be powered and cannot have B1327 - Battery Voltage Low as an active DTC for this DTC to set.

1. If a memory switch continues to be active for 30 seconds after the last motor controlled by MSM/DPM reaches the end of its travel, the switch will be considered shorted and the MSM/DPM will set a switch DTC.
2. If a position sensor DTC is current and the associated switch is active for 30 continuous seconds, the switch will be considered shorted and the MSM/DPM will set a switch DTC.

1. Current and history codes are set.
2. All memory recall commands and class 2 Driver Identifier are ignored.
3. The MSM/DPM will respond to any other switch signal that has not set a DTC.

1. The DTC automatically clears when the switch circuit setting the DTC is no longer active.
2. The MSM/DPM will clear the history DTC after 50 fault free ignition cycles.

The MSM is also known as the DPM for this vehicle.

The numbers below refer to the step numbers on the diagnostic table.

1. 2: Checks the existing state of the memory switch by using the current state of the switch parameter.
2. 10: This step verifies the repair.

DTC B2757, B2762, B2767, or B2772

Symptoms - Seats

1. Refer to the system description and operation from the following list in order to familiarize yourself with the system functions: «Power Seats System Description and Operation»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system__power-seats-system-description-and-operation) «Lumbar Support Description and Operation»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system__lumbar-support-description-and-operation) «Heated/Cooled Seats Description and Operation»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system__heatedcooled-seats-description-and-operation) «Memory Seats Description and Operation»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system__memory-seats-description-and-operation)
2. If you are diagnosing a seat with memory (A45) perform the «Diagnostic System Check - Vehicle»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) in Vehicle DTC Information before using the symptom tables in order to verify that all of the following are true: There are no DTCs set. The control modules can communicate via the serial data link.

Visual/Physical Inspection

1. Inspect for aftermarket devices which could affect the operation of the power seats. Refer to «Checking Aftermarket Accessories»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__checking-aftermarket-accessories) in Wiring Systems.
2. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
3. Inspect the seat adjuster track for conditions which may cause binding or objects within the seat adjustment range which obstruct movement or interfere with wiring.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom

1. «Power Seat Inoperative (with A45)»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) or «Power Seat Inoperative (w/o A45)»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system__power-seat-inoperative-wo-a45)
2. «Memory Seat Feature Inoperative»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system)
3. «Lumbar Support Inoperative»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system)
4. «Heated/Cooled Seats Inoperative»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system)

The memory seat module (MSM) is also referenced as the driver position module (DPM) for this vehicle.

The number below refer to the step numbers on the diagnostic table.

1. 8: This step tests the integrity of the signal circuits of the seat adjuster switch. If the fuse in the jumper wire opens when you perform this test, a short to ground may have occurred.

Power Seat Inoperative (with A45)

Power Seat Inoperative (w/o A45)

Power Seat Inoperative (w/o A45)

The memory seat module (MSM) is also known as the driver position module (DPM) for this vehicle.

The numbers below refer to the step numbers on the diagnostic table.

1. 7: If the fuse in the jumper wire opens when you perform this test, the signal circuit is shorted to ground.
2. 8: If the fuse in the jumper wire opens when you perform this test, the signal circuit is shorted to ground.

Memory Seat Feature Inoperative

The lumbar pump and control module are separate units that are attached to each other by a wire harness and a hose. They are serviced as an assembly.

Lumbar Support Inoperative

In order to perform valid tests when diagnosing the climate control seat system, the ignition must be cycled OFF then ON between each test in order to reset the climate control seat module.

A short to ground in the heated/cool ventilation module HEAT control circuit will open the HTDST fuse when the heat mode is selected, and the heat mode will be inoperative. However, when the COOL mode is selected, the system will operate normally.

A short to ground in the heated/cool ventilation module COOL control circuit will open the HTDST fuse when the cool mode is selected and the system will be inoperative. However, when the HEAT mode is selected, the system operate normally.

The number below refer to the step numbers on the diagnostic table.

1. 3: This step determines if the climate control seat module turns ON by using the current state of the blower motor. While performing this test, pay close attention to the blower motor because it may operate at a low RPM and for a short period of time. Listen for a low audible noise or feel for light air from the exhaust duct.

Heated/Cooled Seats Inoperative

Removal Procedure

1. Place a protective cover over the sill plate and door trim panel and lower the folding top to provide additional space for seat removal.
2. Tilt the steering wheel full up, if required.
3. Disable the SIR system. Refer to «SIR Disabling and Enabling»(/cadillac/xlr/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) or to «SIR Disabling and Enabling»(/cadillac/xlr/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) in SIR.
4. Position the seat rearward.
5. Remove the push pins and covers from the front of the adjuster legs.
6. Remove the nuts from the front of the adjuster legs.
7. Position the seat forward.
8. Remove the nuts attaching the rear adjuster legs.
9. Disconnect the seat electrical connector.
10. Remove the seatbelt retaining nut and the seatbelt from the anchor stud.
11. Remove the seat.

Installation Procedure

1. Position the seat on the rear studs.
2. Install the seatbelt and the retaining nut to the seat stud. Tighten: Tighten the nut to 41 N.m (31 lb ft).
3. Lift the front of the seat and connect the electrical connector.
4. Install the nut to the rear inboard stud.
5. Install the nut to the rear outboard stud. Tighten: Tighten the nuts to 50 N.m (37 lb ft).
6. Move the seat rearward.
7. Install the nuts to the front adjuster legs. Tighten: Tighten the nuts to 50 N.m (37 lb ft).
8. Install the adjuster leg covers.
9. Secure the covers with push pins.
10. Enable the SIR system. Refer to «SIR Disabling and Enabling»(/cadillac/xlr/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) or to «SIR Disabling and Enabling»(/cadillac/xlr/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) in SIR.
11. Remove the protective cover and raise the folding top.

1. Remove the seat from the vehicle. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
2. Remove the retaining screws at the bottom of the finish panel.
3. Remove the finish panel from the bracket by lifting upwards to disengage.
4. Remove the seat control switch knob from the finish panel by pulling the knob outward.
5. Remove the seat back switch knob from the finish panel by pulling the knob outward.
6. Using a flat-bladed tool, remove the following switches in order from the finish panel: The lumbar switch The seat control switch The memory switch
7. Remove the finish panel.

1. Position the finish panel to the seat.
2. Install the following switches in order to the finish panel: The memory switch The seat control switch The lumbar switch
3. Install the seat back switch knob to the finish panel by pushing the knob to engage the switch.
4. Install the seat control switch knob to the finish panel by pushing the knob to engage the switch.
5. Install the upper edge of the finish panel to the bracket and swing the panel downward to engage.
6. Install the retaining screws at the bottom of the finish panel. Tighten: Tighten the screws to 2.5 N.m (22 lb in).
7. Install the seat to the vehicle. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .

1. Remove the seat from the vehicle. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
2. Remove the retaining screws at the bottom of the finish panel.
3. Remove the finish panel from the bracket by lifting upwards to disengage.
4. Remove the seat control switch knob from the finish panel by pulling the knob outward.
5. Remove the seat back switch knob from the finish panel by pulling the knob outward.
6. Using a flat-bladed tool, remove the following switches in order from the finish panel: The lumbar switch The seat control switch The memory switch
7. Remove the finish panel.

1. Position the finish panel to the seat.
2. Install the following switches in order to the finish panel: The memory switch The seat control switch The lumbar switch
3. Install the seat back switch knob to the finish panel by pushing the knob to engage the switch.
4. Install the seat control switch knob to the finish panel by pushing the knob to engage the switch.
5. Install the upper edge of the finish panel to the bracket and swing the panel downward to engage.
6. Install the retaining screws at the bottom of the finish panel. Tighten: Tighten the screws to 2.5 N.m (22 lb in).
7. Install the seat to the vehicle. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .

1. Remove the finish panel. Refer to «Driver Seat Outer Finish Panel Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
2. Remove the retaining screws from the rear panel bracket and remove the bracket from the seat.

1. Position the rear panel bracket to the seat using 2 small punch tools to locate the bracket holes in the seat frame.
2. Remove 1 punch tool and install the retaining screw. Do NOT tighten.
3. Repeat the procedure for the remaining screw. Tighten: Tighten the screws to 2.5 N.m (22 lb in).
4. Install the finish panel. Refer to «Driver Seat Outer Finish Panel Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .

1. Remove the finish panel. Refer to «Passenger Seat Outer Finish Panel Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
2. Remove the retaining screws from the rear panel bracket and remove the bracket from the seat.

1. Position the rear panel bracket to the seat using 2 small punch tools to locate the bracket holes in the seat frame.
2. Remove 1 punch tool and install the retaining screw. Do NOT tighten.
3. Repeat the procedure for the remaining screw. Tighten: Tighten the screws to 2.5 N.m (22 lb in).
4. Install the finish panel. Refer to «Passenger Seat Outer Finish Panel Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .

1. Remove the seat. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
2. Remove the seat belt buckle and pretensioner from the seat frame. Refer to «Seat Belt Buckle Pretensioner Replacement»(/cadillac/xlr/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) .
3. Remove the driver seat finish panel. Refer to «Driver Seat Outer Finish Panel Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
4. Remove the driver seat rear panel bracket. Refer to «Driver Seat Rear Panel Bracket Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
5. Remove the retaining clips which secure the cushion cover to the seat frame.
6. Remove the cover from the seat.

1. Position the trim cover over the seat cushion foam.
2. Install the cover to the seat frame.
3. Install the attaching retainers from the cover to the seat frame.
4. Install the rear flap ends together. Engage the hook and the loop.
5. Install the driver seat rear panel bracket. Refer to «Driver Seat Rear Panel Bracket Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
6. Install the driver seat finish pane. Refer to «Driver Seat Outer Finish Panel Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
7. Install the seat belt buckle and the pretensioner to the seat frame. Tighten: Tighten the mounting nut to 40 N.m (29 lb ft).
8. Install the seat. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .

1. Remove the seat. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
2. Remove the seat belt buckle and pretensioner from the seat frame. Refer to «Seat Belt Buckle Pretensioner Replacement»(/cadillac/xlr/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system)
3. Remove the passenger seat finish panel. Refer to «Passenger Seat Outer Finish Panel Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
4. Remove the passenger seat rear panel bracket. Refer to «Passenger Seat Rear Panel Bracket Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
5. Remove the retaining clips which secure the cushion cover to the seat frame.
6. Remove the cover from the seat.

1. Position the trim cover over the seat cushion foam.
2. Install the cover to the seat frame.
3. Install the attaching retainers from the cover to the seat frame.
4. Install the rear flap ends together. Engage the hook and the loop.
5. Install the passenger seat rear panel bracket. Refer to «Passenger Seat Rear Panel Bracket Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
6. Install the passenger seat finish panel. Refer to «Passenger Seat Outer Finish Panel Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
7. Install the seat belt buckle and the pretensioner to the seat frame. Tighten: Tighten the mounting nut to 40 N.m (29 lb ft).
8. Install the seat. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
9. Re-zero the inflatable restraint passenger presence system whenever the seat cushion or any component of the passenger presence system is removed. Refer to «Passenger Presence System Programming and Setup»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#programming-and-setup-all-systems__passenger-presence-system-programming-and-setup) .

1. Remove the seat cushion cover. Refer to «Driver Seat Cushion Cover Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
2. Remove the cushion pad from the seat frame.

1. Install the cushion pad to the seat frame.
2. Install the seat cushion cover. Refer to «Driver Seat Cushion Cover Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .

1. Remove the seat cushion cover. Refer to «Passenger Seat Cushion Cover Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
2. Remove the cushion pad from the seat frame.

1. Install the cushion pad to the seat frame.
2. Install the seat cushion cover. Refer to «Passenger Seat Cushion Cover Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
3. Re-zero the inflatable restraint passenger presence system whenever the seat cushion or any component of the passenger presence system is removed. Refer to «Passenger Presence System Programming and Setup»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#programming-and-setup-all-systems__passenger-presence-system-programming-and-setup) .

1. Remove the seat from the vehicle. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
2. Remove the seat back insert. Refer to «Driver Seat Back Insert Cover Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) or to «Passenger Seat Back Insert Cover Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
3. Remove the seat speaker grilles. Refer to «Driver Seat Speaker Grille Replacement»(/cadillac/xlr/i-2003-2009/remont/entertainment-systems/#entertainment-systems) .
4. Remove the seat speakers. Refer to «Driver Seat Speaker Replacement»(/cadillac/xlr/i-2003-2009/remont/entertainment-systems/#entertainment-systems) or to «Passenger Seat Speaker Replacement»(/cadillac/xlr/i-2003-2009/remont/entertainment-systems/#entertainment-systems) .
5. Remove the J-hooks that secure the seat back cover to the bottom of the seat back.
6. Remove the fir tree retainers that secure the seat back cover to the seat back frame.
7. Remove the SIAB side inflatable restraint module. Refer to «Inflatable Restraint Side Impact Module Replacement - Front»(/cadillac/xlr/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) .
8. Remove the seat back trim cover from the seat, starting at the lower inboard side of the seat back and working the cover up and over the foam.
9. Remove the seat back cover.

1. Install the seat back cover.
2. Install the seat back trim cover over the seat back working the cover down and over the foam.
3. Install the SIAB side inflatable restraint module. Refer to «Inflatable Restraint Side Impact Module Replacement - Front»(/cadillac/xlr/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) .
4. Install the fir tree retainers that secure the seat back cover to the seat back frame.
5. Install the J-hooks that secure the seat back cover to the bottom of the seat back.
6. Install the seat speakers. Refer to «Driver Seat Speaker Replacement»(/cadillac/xlr/i-2003-2009/remont/entertainment-systems/#entertainment-systems) or to «Passenger Seat Speaker Replacement»(/cadillac/xlr/i-2003-2009/remont/entertainment-systems/#entertainment-systems) .
7. Install the seat speaker grilles. Refer to «Driver Seat Speaker Grille Replacement»(/cadillac/xlr/i-2003-2009/remont/entertainment-systems/#entertainment-systems) .
8. Install the seat back insert. Refer to «Driver Seat Back Insert Cover Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) or to «Passenger Seat Back Insert Cover Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
9. Install the seat to the vehicle. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .

1. Remove the seat from the vehicle. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
2. Remove the seat back insert. Refer to «Driver Seat Back Insert Cover Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
3. Remove the seat speaker grilles. Refer to «Driver Seat Speaker Grille Replacement»(/cadillac/xlr/i-2003-2009/remont/entertainment-systems/#entertainment-systems) .
4. Remove the seat speakers. Refer to «Driver Seat Speaker Replacement»(/cadillac/xlr/i-2003-2009/remont/entertainment-systems/#entertainment-systems) .
5. Remove the J-hooks that secure the seat back cover to the bottom of the seat back
6. Remove the fir tree retainers that secure the seat back cover to the seat back frame.
7. Remove the SIAB side inflatable restraint module. Refer to «Inflatable Restraint Side Impact Module Replacement - Front»(/cadillac/xlr/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) .
8. Remove the seat back trim cover from the seat, starting at the lower inboard side of the seat back and working the cover up and over the foam.
9. Remove the cushion pad from the seat back.

1. Install the cushion pad to the seat back.
2. Install the seat back trim cover over the seat back working the cover down and over the foam.
3. Install the SIAB side inflatable restraint module. Refer to «Inflatable Restraint Side Impact Module Replacement - Front»(/cadillac/xlr/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) .
4. Install the fir tree retainers that secure the seat back cover to the seat back frame.
5. Install the J-hooks that secure the seat back cover to the bottom of the seat back.
6. Install the seat speakers. Refer to «Driver Seat Speaker Replacement»(/cadillac/xlr/i-2003-2009/remont/entertainment-systems/#entertainment-systems) .
7. Install the seat speaker grilles. Refer to «Driver Seat Speaker Grille Replacement»(/cadillac/xlr/i-2003-2009/remont/entertainment-systems/#entertainment-systems) .
8. Install the seat back insert. Refer to «Driver Seat Back Insert Cover Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
9. Install the seat to the vehicle. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .

1. Remove the seat from the vehicle. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
2. Remove the seat back insert. Refer to «Passenger Seat Back Insert Cover Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
3. Remove the seat speaker grilles. Refer to «Passenger Seat Speaker Grille Replacement»(/cadillac/xlr/i-2003-2009/remont/entertainment-systems/#entertainment-systems) .
4. Remove the seat speakers. Refer to «Passenger Seat Speaker Replacement»(/cadillac/xlr/i-2003-2009/remont/entertainment-systems/#entertainment-systems) .
5. Remove the J-hooks that secure the seat back cover to the bottom of the seat back.
6. Remove the fir tree retainers that secure the seat back cover to the seat back frame.
7. Remove the SIAB side inflatable restraint module. Refer to «Inflatable Restraint Side Impact Module Replacement - Front»(/cadillac/xlr/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) .
8. Remove the seat back trim cover from the seat, starting at the lower inboard side of the seat back and working the cover up and over the foam.
9. Remove the cushion pad from the seat back.

1. Install the cushion pad to the seat back.
2. Install the seat back trim cover over the seat back working the cover down and over the foam.
3. Install the SIAB side inflatable restraint module. Refer to «Inflatable Restraint Side Impact Module Replacement - Front»(/cadillac/xlr/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) .
4. Install the fir tree retainers that secure the seat back cover to the seat back frame.
5. Install the J-hooks that secure the seat back cover to the bottom of the seat back.
6. Install the seat speakers. Refer to «Passenger Seat Speaker Replacement»(/cadillac/xlr/i-2003-2009/remont/entertainment-systems/#entertainment-systems) .
7. Install the seat speaker grilles. Refer to «Passenger Seat Speaker Grille Replacement»(/cadillac/xlr/i-2003-2009/remont/entertainment-systems/#entertainment-systems) .
8. Install the seat back insert. Refer to «Passenger Seat Back Insert Cover Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
9. Install the seat to the vehicle. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .

1. Remove the seat assembly. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
2. Remove the seat back cushion. Refer to «Driver Seat Back Cushion Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) or to «Driver Seat Back Cushion Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
3. Remove the hook and loop at the end of the seat cushion cover.
4. Remove the seat belt buckle pretensioner. Refer to «Seat Belt Buckle Pretensioner Replacement»(/cadillac/xlr/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) .
5. Disconnect the wire harness retainers from the seat back.
6. Remove the hinge nuts and bolts.
7. Remove the seat back frame from the lower seat assembly.
8. Transfer the seat speakers as required. Refer to «Driver Seat Speaker Replacement»(/cadillac/xlr/i-2003-2009/remont/entertainment-systems/#entertainment-systems) or to «Passenger Seat Speaker Replacement»(/cadillac/xlr/i-2003-2009/remont/entertainment-systems/#entertainment-systems) .

1. Install the seat back frame to the lower seat assembly.
2. Install the hinge bolts and nuts. Tighten: Tighten the nuts to 24 N.m (18 lb ft).
3. Connect the wire harness retainers to the seat back.
4. Install the seat belt buckle pretensioner. Refer to «Seat Belt Buckle Pretensioner Replacement»(/cadillac/xlr/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) .
5. Install the hook and loop at the end of the seat cushion cover.
6. Install the seat back cushion. Refer to «Driver Seat Back Cushion Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) or to «Driver Seat Back Cushion Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
7. Install the seat assembly. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .

1. Raise the seat to the full up position.
2. Remove the seat. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
3. Remove the finish panel. Refer to «Driver Seat Outer Finish Panel Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) or to «Passenger Seat Outer Finish Panel Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
4. Remove the seat cushion cover. Refer to «Driver Seat Cushion Cover Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) or to «Passenger Seat Cushion Cover Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
5. Remove the hinge pin nuts and the hinge pins.
6. Lay the seatback down.
7. Remove the seat from the adjuster attaching screws.
8. Remove the screws attaching the recliner mechanism to the seat frame.
9. Remove the recliner mechanism.

1. Install the recliner mechanism to the seat frame.
2. Install the seat adjusters to the seat.
3. Apply Loctite™ 271 to the bolts and secure the adjuster to the seat. Tighten: Tighten the bolts to 24 N.m (18 lb ft).
4. Install the hinge bolts, seatback release cables, and nuts. Tighten: Tighten the nuts to 24 N.m (18 lb ft).
5. Install the seat cushion cover. Refer to «Driver Seat Cushion Cover Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) or to «Passenger Seat Cushion Cover Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
6. Install the finish panel. Refer to «Driver Seat Outer Finish Panel Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) or to «Passenger Seat Outer Finish Panel Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
7. Install the seat. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .

1. Remove the insert at the seat back. Push down on the insert to disengage the insert from the ventilation duct.
2. Remove the lower fir tree retainers at the bottom of the insert.
3. Remove the insert from the seat.
4. Open the insert cover hook and the loop flaps.
5. Remove the cover from the pad.

1. Install the cover onto the pad.
2. Close the cover flaps and engage the hook and the loop.
3. Install the insert to the seat back.
4. Install the fir tree retainers at the bottom of the insert.
5. Install the insert to the ventilation duct at the top. Push down and under the duct. Then pull up to engage the insert.

1. Remove the insert at the seat back. Push down on the insert to disengage the insert from the ventilation duct.
2. Remove the lower fir tree retainers at the bottom of the insert.
3. Remove the insert from the seat.
4. Open the insert cover hook and the loop flaps.
5. Remove the cover from the pad.

1. Install the cover onto the pad.
2. Close the cover flaps and engage the hook and the loop.
3. Install the insert to the seat back.
4. Install the fir tree retainers at the bottom of the insert.
5. Install the insert to the ventilation duct at the top. Push down and under the duct. Then pull up to engage the insert.

1. Remove the insert at the seat back. Push down on the insert to disengage the insert from the ventilation duct.
2. Remove the lower fir tree retainers at the bottom of the insert.
3. Remove the insert from the seat.
4. Open the insert cover hook and the loop flaps.
5. Remove the cover from the pad.

1. Install the cover onto the pad.
2. Close the cover flaps and engage the hook and the loop.
3. Install the insert to the seat back.
4. Install the fir tree retainers at the bottom of the insert.
5. Install the insert to the ventilation duct at the top. Push down and under the duct. Then pull up to engage the insert.

1. Remove the insert at the seat back. Push down on the insert to disengage the insert from the ventilation duct.
2. Remove the lower fir tree retainers at the bottom of the insert.
3. Remove the insert from the seat.
4. Open the insert cover hook and the loop flaps.
5. Remove the cover from the pad.

1. Install the cover onto the pad.
2. Close the cover flaps and engage the hook and the loop.
3. Install the insert to the seat back.
4. Install the fir tree retainers at the bottom of the insert.
5. Install the insert to the ventilation duct at the top. Push down and under the duct. Then pull up to engage the insert.

The lumbar pump and control module are separate units that are attached to each other by a wire harness and a hose. They are supplied and replaced as an assembly. The lumbar pump is contained in a vinyl pouch under the seat and is tie strapped to the seat adjuster torque tube. The attached control module is contained in a vinyl pouch and is secured with J strips to the bottom of the seat support springs. The service part is supplied with connector fittings and the air hoses are labeled #3 and #4 to aid in assembly.

1. Raise the seat to the full up position.
2. Remove the seat. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
3. Remove the seat cushion cover. Refer to «Driver Seat Cushion Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) or to «Passenger Seat Cushion Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
4. Remove the tie straps attaching the pump to the torque tube (4) under the seat.
5. Remove the control module by unhooking the J strips from the seat cushion support wires.
6. Disconnect the electrical connector.
7. Reposition the pump and the lumbar control module from under the seat support wires to on top of the seat support wires.
8. Cut the air hoses (1) that connect the control module to the bladder 75 mm (3 in) from the control module (5).
9. Remove the pump (4) and the control module (5) as an assembly.

1. Lay the new pump and control module assembly on top of the seat spring assembly.
2. Apply a very small amount of air to each of the 2 lumbar bladder hoses. Perform the procedure in the next step based upon the following information: If the upper lumbar inflates, connect that hose to the hose labeled #3 on the new pump. If the lower lumbar inflates, connect that hose to the hose labeled #4 on the new pump.
3. Using Loctite™ 406, or equivalent, glue each hose to the fitting (2) in the module hose. Position the hose just over the edge of the barb on the attaching fitting. Apply the adhesive completely around the fitting. Quickly push the hose the rest of the way onto the fitting.
4. Insert the pump and the control module down under the seat support wires.
5. Attach the control module with the J strips facing outward to the underside of the seat cushion support wires.
6. Connect the electrical connector to the control module.
7. Tie strap the pump to the torque tube (4) under the front of the seat.
8. Install the seat cushion trim cover. Refer to «Driver Seat Cushion Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) or to «Passenger Seat Cushion Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
9. Install the seat. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .

1. Remove the seat outer finish panel. Refer to «Driver Seat Outer Finish Panel Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
2. Use a small flat-bladed tool to release the switch from the finish panel. Remove the switch.
3. Disconnect the electrical connector to the lumbar switch.

1. Connect the electrical connector to the lumbar switch.
2. Install the lumbar switch to the finish panel. Press until the switch snaps into place.
3. Install the finish panel. Refer to «Driver Seat Outer Finish Panel Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .

The lumbar bladders are serviced as a single system. The bladder system is serviced separate from the module assembly. The bladder service part is supplied with the necessary connector fittings. The bladder hoses are labeled #3 and #4 to aid in assembly.

1. Raise the seat to the full up position.
2. Remove the seat. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
3. Remove the seat cushion cover and pad. Refer to «Driver Seat Cushion Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) and to «Passenger Seat Cushion Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
4. Remove the seat back insert by pushing down to disengage at the top.
5. Remove the 2 lower fir tree fasteners attaching the seat back insert.
6. Remove the 2 fir tree fasteners which retain the bladder to the seat back.
7. Remove the lumbar bladder system from the seat back.
8. Remove the control module J strips from the seat support wires.
9. Reposition the control module to the top of the seat support wires. It is not necessary to remove the lumbar pump.
10. Cut the hoses (4) connecting the control module to the bladders 75 mm (3 in) from the control module.
11. Remove the lumbar bladder assembly.

1. Position the lumbar support bladders to the seat back inserting the tabs into the seat back.
2. Route the hoses through the pivot area and tie strap them to the seat frame under the seat back adjuster.
3. Connect the seat switch to the harness.
4. Connect power to the seat. You may need to position the seat in the vehicle.
5. Perform the procedure in the next step based upon the following information: Operate the upper lumbar control and connect the hose that pressurized to the bladder hose labeled #3. Operate the lower lumbar control and connect the hose that pressurized to the bladder hose labeled #4.
6. Using Loctite™ 406, or equivalent, glue the module hoses to the fittings on the bladder hoses (4). Position the hose just over the edge of the barb on the attaching fitting. Apply the adhesive completely around the fitting. Quickly push the hose the rest of the way onto the fitting.
7. Install the control module to the seat support wires with the J-strips.
8. Disconnect the seat electrical connector and remove the seat from the vehicle.
9. Install the seat cushion cover. Refer to «Driver Seat Cushion Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) or to «Passenger Seat Cushion Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
10. Attach the cover and the bladder assembly with the 2 fir tree fasteners.
11. Tuck the cover over the corners of the hinges.
12. Install the seat back insert.
13. Install the seat. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .

1. Remove the seat. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
2. Remove the seat cushion cover. Refer to «Driver Seat Cushion Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
3. Reposition the lumbar pump, if equipped. Remove the tie straps and reposition the pump and pouch up through the seat support wires.
4. Disconnect the seat belt harness from the seat frame.
5. Remove the memory seat control module.
6. Remove the bolts mounting the seat to the adjuster.
7. Remove the adjuster.
8. Transfer parts as necessary.

1. Install the adjuster to the seat. Tighten: Tighten the bolts to 24 N.m (18 lb ft).
2. Install the lumbar pump, if equipped. Secure the pump to the torque tube with tie straps.
3. Connect the seat belt harness to the seat frame.
4. Install the memory seat control module.
5. Install the seat cushion cover. Refer to «Driver Seat Cushion Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
6. Install the seat. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
7. Calibrate the seat. Refer to «Memory Seat Calibration»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system__memory-seat-calibration) .

1. Remove the seat. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
2. Remove the seat cushion cover. Refer to «Passenger Seat Cushion Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
3. Reposition the lumbar pump, if equipped. Remove the tie straps and reposition the pump and pouch up through the seat support wires.
4. Disconnect the seat belt harness from the seat frame.
5. Remove the memory seat control module.
6. Remove the bolts mounting the seat to the adjuster.
7. Remove the adjuster.
8. Transfer parts as necessary.

1. Install the adjuster to the seat. Tighten: Tighten the bolts to 24 N.m (18 lb ft).
2. Install the lumbar pump, if equipped. Secure the pump to the torque tube with tie straps.
3. Connect the seat belt harness to the seat frame.
4. Install the memory seat control module.
5. Install the seat cushion cover. Refer to «Passenger Seat Cushion Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
6. Install the seat. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .

1. Position the seat fully rearward.
2. Remove the plastic rivet from the seat track cover.
3. Remove the cover from the seat track.

1. Install the cover to the seat track.
2. Install a plastic rivet to the cover.
3. Return the seat to the customer position.

1. Raise the seat up to access the switch knob.
2. Using a small plastic flat-bladed tool, pry between the finish panel and the back of the switch knob.
3. Remove the knob from the switch.

1. Align the switch knob to the switch pins.
2. Install the knob to the switch. Gently push to engage the knob.
3. Return the seat to the customer position.

1. Raise the seat up to access the switch knob.
2. Using a small plastic flat-bladed tool, pry between the finish panel and the back of the switch knob.
3. Remove the knob from the switch.

1. Align the switch knob to the switch pins.
2. Install the knob to the switch. Gently push to engage the knob.
3. Return the seat to the customer position.

1. Remove the seat assembly. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
2. Remove the finish side panel. Refer to «Driver Seat Outer Finish Panel Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
3. Disconnect the electrical connector from the seat switch.
4. Use a small flat-bladed tool to release the retainers to the switch. Remove the seat switch from the finish panel.

1. Install the seat switch to the finish panel. Push to engage the retainers to the panel.
2. Connect the electrical connector to the seat switch.
3. Install the finish side panel. Refer to «Driver Seat Outer Finish Panel Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
4. Install the seat assembly. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .

1. Remove the seat assembly. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
2. Remove the finish side panel. Refer to «Passenger Seat Outer Finish Panel Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
3. Disconnect the electrical connector from the seat switch.
4. Use a small flat-bladed tool to release the retainers to the switch. Remove the seat switch from the finish panel.

1. Install the seat switch to the finish panel. Push to engage the retainers to the panel.
2. Connect the electrical connector to the seat switch.
3. Install the finish side panel. Refer to «Passenger Seat Outer Finish Panel Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
4. Install the seat assembly. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .

1. Remove the seat. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
2. Remove the memory seat control module from the seat track assembly by cutting the tie straps.
3. Disconnect the harness connectors.

1. Connect harness connectors to the memory seat control module.
2. Install the memory seat control module to the seat track assembly using the tie straps.
3. Install the seat. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
4. Calibrate the seat. Refer to «Memory Seat Calibration»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system__memory-seat-calibration) .
5. Refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for programming and setup information.

Memory Seat Calibration

The memory seat module uses position sensor inputs to establish soft stop locations for the adjuster motors several millimeters ahead of the physical limits of the adjuster assembly. After replacing a memory seat module or adjuster components, it may be necessary to reset the adjuster motor soft stop locations. When the repair procedure has been completed, operate the seat adjuster switch in every direction until the seat adjuster reaches its mechanical hard stop by repeatedly pressing and releasing the switch as necessary.

1. Remove the seat. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
2. Remove the memory seat control module from the seat track assembly by cutting the tie straps.
3. Disconnect the harness connectors.

1. Connect harness connectors to the memory seat control module.
2. Install the memory seat control module to the seat track assembly using the tie straps.
3. Install the seat. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
4. Refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for programming and setup information.

1. Remove the seat. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
2. Remove the memory seat control module from the seat track assembly by cutting the tie straps.
3. Disconnect the harness connectors.

1. Connect harness connectors to the memory seat control module.
2. Install the memory seat control module to the seat track assembly using the tie straps.
3. Install the seat. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
4. Refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for programming and setup information.

1. Remove the seat. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
2. Cut the tie straps to the blower from the seat duct work.
3. Disconnect the electrical connection to the blower assembly.
4. Remove the screws from the blower to the seat bottom.
5. Remove the blower assembly from the seat bottom.

1. Install the blower assembly to the seat bottom.
2. Install the blower assembly screws to the seat bottom. Tighten: Tighten the screws to 2.5 N.m (22 lb in).
3. Connect the electrical connection to the blower assembly.
4. Install the seat duct work to the blower. Secure the duct work with new tie straps.
5. Install the seat. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .

1. Remove the seat. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
2. Cut the tie straps to the blower from the seat duct work.
3. Disconnect the electrical connection to the blower assembly.
4. Remove the screws from the blower to the seat bottom.
5. Remove the blower assembly from the seat bottom.

1. Install the blower assembly to the seat bottom.
2. Install the blower assembly screws to the seat bottom. Tighten: Tighten the screws to 2.5 N.m (22 lb in).
3. Connect the electrical connection to the blower assembly.
4. Install the seat duct work to the blower. Secure the duct work with new tie straps.
5. Install the seat. Refer to «Seat Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .

1. Remove the seat back trim cover and cushion. Refer to «Driver Seat Back Cushion Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
2. Disconnect the electrical connector to the ventilation module.
3. Cut the tie strap to the ventilation duct.
4. Remove the retaining screws from the ventilation module to the seat back.
5. Remove the ventilation module from the seat.

1. Install the ventilation module to the seat.
2. Install the retaining screws securing the ventilation module to the seat back.
3. Connect the electrical connector to the ventilation module.
4. Install the ventilation duct to the ventilation module. Secure the duct with new tie straps.
5. Install the seat back trim cover and cushion. Refer to «Driver Seat Back Cushion Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .

1. Remove the seat back trim cover and cushion. Refer to «Passenger Seat Back Cushion Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
2. Disconnect the electrical connector to the ventilation module.
3. Cut the tie strap to the ventilation duct.
4. Remove the retaining screws from the ventilation module to the seat back.
5. Remove the ventilation module from the seat.

1. Install the ventilation module to the seat.
2. Install the retaining screws securing the ventilation module to the seat back.
3. Connect the electrical connector to the ventilation module.
4. Install the ventilation duct to the ventilation module. Secure the duct with new tie straps.
5. Install the seat back trim cover and cushion. Refer to «Passenger Seat Back Cushion Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .

1. Remove the seat cover and cushion. Refer to «Driver Seat Cushion Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
2. Disconnect the electrical connector to the ventilation module.
3. Cut the tie strap to the ventilation duct.
4. Remove the retaining screw from the ventilation module to the seat cushion wire frame.
5. Remove the ventilation module from the seat.

1. Install the ventilation module to the seat cushion wire frame.
2. Install the retaining screw to the ventilation module. Tighten: Tighten the screw to 2.5 N.m (22 lb in).
3. Connect the electrical connector to the ventilation module.
4. Install the ventilation duct to the ventilation module and tie with a new strap.
5. Install the seat cover and cushion. Refer to «Driver Seat Cushion Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .

1. Remove the seat cover and cushion. Refer to «Passenger Seat Cushion Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
2. Disconnect the electrical connector to the ventilation module.
3. Cut the tie strap to the ventilation duct.
4. Remove the retaining screw from the ventilation module to the seat cushion wire frame.
5. Remove the ventilation module from the seat.

1. Install the ventilation module to the seat cushion wire frame.
2. Install the retaining screw to the ventilation module. Tighten: Tighten the screw to 2.5 N.m (22 lb in).
3. Connect the electrical connector to the ventilation module.
4. Install the ventilation duct to the ventilation module and tie with a new strap.
5. Install the seat cover and cushion. Refer to «Passenger Seat Cushion Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .

1. Remove the seat cover and cushion. Refer to «Driver Seat Cushion Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
2. Cut the tie straps to the ventilation duct at the heat and cool module and blower
3. Remove the ventilation duct from the heat and cool module and blower.
4. Remove the ventilation duct from the seat cushion wire frame.

1. Install the ventilation duct to the seat cushion wire frame.
2. Install the duct to the heat and cool module and blower.
3. Secure the duct with new tie straps.
4. Install the seat cover and cushion. Refer to «Driver Seat Cushion Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .

1. Remove the seat cover and cushion. Refer to «Passenger Seat Cushion Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
2. Cut the tie straps to the ventilation duct at the heat and cool module and blower
3. Remove the ventilation duct from the heat and cool module and blower.
4. Remove the ventilation duct from the seat cushion wire frame.

1. Install the ventilation duct to the seat cushion wire frame.
2. Install the duct to the heat and cool module and blower.
3. Secure the duct with new tie straps.
4. Install the seat cover and cushion. Refer to «Passenger Seat Cushion Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .

1. Remove the seat cover and cushion. Refer to «Driver Seat Back Cushion Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
2. Cut the tie straps retaining the ventilation duct to the seat back frame.
3. Cut the tie straps retaining the ventilation duct to the heat and cool module and blower.
4. Remove the ventilation duct from the heat and cool module and blower.
5. Remove the ventilation duct from the seat back frame.

1. Install the ventilation duct to the seat back frame.
2. Install the ventilation duct to the heat and cool module and blower.
3. Tie new plastic straps retaining the ventilation duct to the heat and cool module and blower.
4. Tie new plastic straps retaining the ventilation duct to the seat back frame.
5. Install the seat cover and cushion. Refer to «Driver Seat Back Cushion Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .

1. Remove the seat cover and cushion. Refer to «Passenger Seat Back Cushion Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .
2. Cut the tie straps retaining the ventilation duct to the seat back frame.
3. Cut the tie straps retaining the ventilation duct to the heat and cool module and blower.
4. Remove the ventilation duct from the heat and cool module and blower.
5. Remove the ventilation duct from the seat back frame.

1. Install the ventilation duct to the seat back frame.
2. Install the ventilation duct to the heat and cool module and blower.
3. Tie new plastic straps retaining the ventilation duct to the heat and cool module and blower.
4. Tie new plastic straps retaining the ventilation duct to the seat back frame.
5. Install the seat cover and cushion. Refer to «Passenger Seat Back Cushion Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/seats/#seat-system) .

Power Seats System Description and Operation

The passenger power seat system consists of the following components

1. Seat Adjuster Switch
2. Seat Horizontal Motor
3. Seat Front Vertical Motor
4. Seat Rear Vertical Motor
5. Seat Recline Motor
6. SEATS Circuit Breaker 30 A

Seat Adjuster Switch

The seat adjuster switch provides both power and ground to the selected seat motors. Battery positive voltage is supplied at all times to the passenger seat adjuster switch from the SEATS Circuit Breaker located in the IP fuse block. The switch is grounded through the switch ground circuit and G307.

Motors

All of the seat motors operate independently of each other. Each motor contains an electronic circuit breaker (PTC) that opens in the event of a circuit overload and will reset only after voltage has been removed from the circuit. There are four seat position motors. These are the horizontal motor, front vertical motor, rear vertical motor, and the seat back recline motor. The horizontal motor moves the entire seat forward and rearward. The seat vertical motors may operate independently to tilt the front or rear of the seat cushion up or down. Both motors can also run simultaneously to move the entire seat up or down. The recline motor moves the angle of the seat back forward or rearward.

Horizontal

When the seat switch is operated to move the entire seat forward, battery positive voltage is applied through the switch contacts and the horizontal motor forward control circuit to the motor. The motor is grounded through the horizontal motor rearward switch contacts and the horizontal motor rearward control circuit to the motor. The motor runs in order to drive the entire seat forward until the switch is released. Moving the entire seat rearward works similarly to moving the entire seat forward, except that battery positive voltage and ground are applied on opposite circuits causing the motor to run in the opposite direction.

Rear Vertical

When the seat switch is operated to tilt the rear of the seat cushion up, battery positive voltage is applied through the switch contacts and the rear vertical motor up control circuit to the rear vertical motor. The motor is grounded through the down switch contacts and the rear vertical motor down control circuit to the motor. The motor runs in order to drive the rear of the seat cushion up until the switch is released. Tilting the rear of the seat cushion down works similarly to tilting the rear of the seat cushion up, except that battery positive voltage and ground are applied on opposite circuits causing the motor to run in the opposite direction.

Front Vertical

When the seat switch is operated to tilt the front of the seat cushion up, battery positive voltage is applied through the switch contacts and the front vertical motor up control circuit to the motor. The motor is grounded through the down switch contacts and the front vertical motor down control circuit to the motor. The motor runs in order to drive the front of the seat cushion up until the switch is released. Tilting the front of the seat cushion down works similarly to tilting the front of the seat cushion up, except that battery positive voltage and ground are applied on opposite circuits causing the motor to run in the opposite direction.

Entire Seat Up or Down

When the seat switch is operated in order to move the entire seat to the up position, battery positive voltage is simultaneously applied through the front and rear vertical motor up switch contacts and the front and rear vertical motor up control circuits to both vertical motors. The motors are grounded through the down switch contacts and the front and rear vertical motor down control circuits to both vertical motors. Both motors run simultaneously in order to drive the entire seat up until the switch is released. Moving the entire seat down works similarly to moving the entire seat up, except that battery positive voltage and ground are applied on the opposite circuits causing the motors to run in the opposite direction.

Recline

When the seat recline switch is operated to move the seat back forward, battery positive voltage is applied through the switch contacts and the recline motor forward control circuit to the motor. The motor is grounded through the rearward switch contacts and the recline motor rearward control circuit to the motor. The motor runs in order to move the seat back forward until the switch is released. Moving the seat back rearward works similarly to moving the seat back forward, except that battery positive voltage and ground are applied on the opposite circuits causing the motor to run in the opposite direction.

Lumbar Support Description and Operation

The driver and passenger lumbar support systems each consist of the following components

1. Upper Lumbar Switch
2. Lower Lumbar Switch
3. Lumbar Pump/Control Module
4. Upper Lumbar Support Bladder
5. Lower Lumbar Support Bladder
6. POWER LUMBAR LH/RH Fuse 15 A

Power and ground

Battery positive voltage is supplied at all times to the driver and passenger lumbar support switches and the lumbar pump/control modules through the battery positive voltage circuit and the POWER LUMBAR LH/RH Fuse located in the instrument panel (I/P) fuse block. Ground is provided through the module ground circuit to the ground stake.

Lumbar Support System Operation

This is a power inflate/deflate pneumatic system used for controlling seat back comfort by inflating or deflating air bladders within the seat back cushion.

The upper and lower lumbar support in the seat backrest may be adjusted independently. When the upper lumbar switch is operated to inflate or increase the amount of lumbar support, battery positive is applied through the switch contacts and the upper lumbar inflate control circuit to the lumbar control module. In response to this signal, the lumbar module energizes its internal inflate relay and the pump motor runs to inflate the upper lumbar support bladder in the seat backrest until the switch is released. When the upper lumbar switch is operated to deflate or decrease the amount of lumbar support, battery positive voltage is applied through the switch contacts and the upper lumbar deflate control circuit to the lumbar module. In response to this signal, the lumbar module releases air from the upper lumbar support bladder until the switch is released. The lumbar lower support is also controlled this way.

Heated/Cooled Seats Description and Operation

The driver and passenger climate control seat systems each consist of the following components

1. Heated/Cooled Seat Switch
2. HVAC Control Module
3. Climate Control Seat Module (CCSM)
4. Heated/Cool Seat Cushion Ventilation Module
5. Heated/Cool Seat Back Ventilation Module
6. Heated/Cooled Seat Blower Motor
7. Seat Cushion Temperature Sensor
8. Seat Back Temperature Sensor
9. HEATED SEAT LH Fuse 15 A
10. HEATED SEAT RH Fuse 15 A
11. RPA / H/C Fuse 1 10 A

Climate Controlled Seat (CCS) System

Both the driver and passenger seat have independent CCS systems. A CCSM mounted to the bottom of each seat cushion electronically controls each CCS system. The CCSM receive power from both battery positive voltage and ignition 1 voltage. The ignition must be in the ON position with the heated/cooled seat switch set in the HEAT or COOL position for CCS system to activate.

Once a CCS system is activated, cabin air is drawn through the blower motor and distributed to each of the heated/cool seat ventilation modules located under the seat cushion and in the seat backrest. The copper fins on the ventilation modules then heat or cool the passing air. The conditioned air is then directed into the bottom of the foam pad and along the surface of the seat to the occupant. The CCSM uses a set of algorithms to control the temperature of the heating/cooling modes.

Heated/Cooled Seat Switch and HVAC Control Module

The driver and passenger climate control seats can be operated independently of one another, and each is activated by a separate heated/cooled seat switch. Both switches are located in the HVAC control module. When a switch is pressed once, the HVAC module illuminates the HI HEAT temperature indicator and sends a pulse width modulated signal to the CCSM. The CCSM then turns on the seat temperature to high heat in response to the switch signal. When the switch is pressed a second time, the HVAC module illuminates the LO HEAT temperature indicator and sends a signal to the CCSM indicating the low heat request. When the switch is pressed a third time, the HVAC module will turn off the temperature indicator and signal the CCSM to turn off the system. If, after a slight pause, the switch is pressed a fourth time, the HVAC module illuminates the HI COOL temperature indicator and sends a signal to the CCSM indicating the high cool request. When the switch is pressed a fifth time, the HVAC module illuminates the LO COOL temperature indicator and sends a signal to the CCSM indicating the low cool temperature request. When the switch is pressed a sixth time, the HVAC module will turn off the temperature indicator and signal the CCSM to turn off the system.

CCSM Power and Ground

Battery positive voltage is supplied at all times to each CCSM through the battery positive voltage circuit and the HEATED SEAT LH Fuse and the HEATED SEAT RH Fuse located in the IP fuse block. This voltage is used by each module to supply power to the ventilation modules and the blower motor. Battery positive voltage is also supplied to each module through the ignition 1 voltage circuit and the RPA / H/C SEAT Fuse 11 located in the body control module (BCM). The RPA / H/C SEAT voltage is used to power up each module and allows the CCS system to operate only with the ignition in the ON position. Each CCSM is grounded through the module ground circuit to the ground stake.

Heated/Cooled Seat Ventilation Modules

Each heated/cooled seat has two heated/cooled seat ventilation modules, which are Thermo-Electronic Devices (TEDs), mounted downstream of the blower motor. These modules are controlled by the CCSM. Each ventilation module consists of a circuit of positive and negative connections sandwiched between two ceramic plates. Each ceramic plate is equipped with copper fins for heat exchange. The air flowing past these fins is either directed as conditioned air to the seat cushion and seat back, or directed to the cabin as waste air.

The ventilation module is essentially a solid state heat pump that is used to heat or cool the air supply to the seat cushion and seat back. When voltage is applied to the ventilation module, one side of the module releases energy as heat, while the opposite side absorbs energy and gets cool. When the polarity of the current flow is switched, the hot and cool sides reverse.

Temperature Sensors

The seat temperature sensors are thermistors which are attached directly to the fins of each ventilation module. The CCSM supplies a 5 volt reference voltage through the temperature sensor signal circuit and ground through the temperature sensor low reference circuit to the respective seat cushion and seat back temperature sensors. As the temperature of the ventilation module changes, the resistance of the thermistor varies changing the feedback voltage of the temperature sensor signal circuit. This voltage varies from 0.5 volts to 4.0 volts. The CCSM monitors this voltage signal to determine the fin temperature so that it can adjust the seat temperature to the selected switch input.

Heated Seat Operation

When the heated/cooled seat switch is pressed for HI Heat, the Temperature Set Point, the CCSM will transition to the HEAT state. In the heat state, the module applies a pre-determined voltage through the heat control circuit to the ventilation module while providing a ground through the cool control circuit to the ventilation module. A pre-determined voltage is also applied through the blower speed control circuit to the blower motor. The CCSM uses the following sequence, beginning with the Heat SoftStart Mode, to achieve the Set Point Temperature before it can enter the Control Heat Mode. If the fin temperature is already above the Temperature Set Point, the CCSM will skip the Heat SoftStart Mode and proceed to the Control Heat Mode.

1. Heat SoftStart Mode: While transitioning to the heat mode, the CCSM will initiate the SoftStart Mode. The intent of the Heat SoftStart Mode is for the module to bring the ventilation module fin temperature up to the pre-determined Temperature Set Point of the High Heat Mode. The module does this by setting the blower motor speed control voltage to 3.0 volts, while ramping up the ventilation module voltage from 0 volts to the maximum available voltage at which point the system transitions to High Heat Mode.
2. High Heat Mode: The intent of the HIGH Heat Mode is to increase the fin temperature to the pre-determined Temperature Set Point in order for the CCSM to go into the Control Heat Mode. The module does this by maintaining the ventilation module at the maximum voltage, while maintaining the minimum required airflow across the fins. After a maximum duration of 3 minutes, or upon achieving the pre-determined temperature set point, the system transitions to the Control Heat Mode.
3. Control Heat Mode: At the completion of high heat mode the CCSM will initiate Control Heat Mode. The intent of the Control Heat Mode is to maintain the desired fin temperature. The CCSM does this by; first, adjusting the voltage supply to the blower motor to control blower motor speed, and second, by controlling the voltage supplied to the ventilation module. The CCSM updates these voltages once every second. Increasing the blower motor speed will decrease the fin temperature. If the maximum blower motor speed is achieved and the fin temperature is still above the set point of high heat, the module will then begin to control the ventilation module voltage to achieve temperature set point. Decreasing the ventilation module voltage decreases the fin temperature. If the CCSM is trying to raise the fin temperature to set point by raising the ventilation module voltage, and the fin temperature can not be raised because the ventilation module voltage is at the maximum, the CCSM will reduce the blower motor speed to achieve the temperature set point.

Cooled Seat Operation

When the heated/cooled seat switch is pressed for HI Cool, the CCSM will transition to the COOL state. In response to this command, the module applies a pre-determined voltage through the cool control circuit to the ventilation module while providing a ground through the heat control circuit to the ventilation module. A pre-determined voltage is also applied to the blower motor. The CCSM uses the following sequence, beginning with the Cool SoftStart Mode, to achieve the Set Point Temperature before it can enter the Control Cool Mode.

1. Cool SoftStart Mode: The intent of the Cool SoftStart Mode is for the CCSM to bring the ventilation module fin temperature up to the pre-determined Temperature Set Point of the high cool mode. The CCSM does this by setting the blower motor speed control voltage to 9.5 volts, while ramping up the ventilation module voltage from 0 volts to 8.7 volts at which point the system transitions to High Cool Mode. If the heated/cooled seat switch was Initially set to LO COOL at this point the system would by-pass the high cool mode and transition directly to the Control Cool Mode.
2. High Cool Mode: The intent of the High Cool Mode is to increase the fin temperature to the pre-determined Temperature Set Point of the control cool mode. The CCSM does this by setting the blower speed voltage to 6.1 volts and the ventilation module voltage to 7.1 volts. After 12 minutes the system transitions to the Control Cool Mode.
3. Control Cool Mode: At the completion of High Cool Mode the CCSM will initiate Control Cool Mode. The intent of the control cool mode is to maintain the fin temperature; first, by adjusting the speed of the blower motor by controlling the voltage supplied to the motor, second, by controlling the ventilation module voltage. The CCSM updates these voltages once every second.

Memory Seats Description and Operation

The memory seat system consists of the following components

1. Seat adjuster switch
2. Memory function switch
3. Memory seat module (MSM)
4. Seat horizontal motor
5. Seat front vertical motor
6. Seat rear vertical motor
7. Seat recline motor
8. Seat horizontal position sensor
9. Seat front vertical position sensor
10. Seat rear vertical position sensor
11. Seat recline position sensor
12. POWER SEATS circuit breaker 30 A
13. TILT/TELE SW/MEM SEAT MOD fuse 10 A

The memory seat module (MSM) is referenced in the Tech 2 as the driver position module (DPM).

Battery positive voltage is supplied at all times to the seat adjuster switch from the TILT/TELE SW/MEM SEAT MOD S fuse located in the body control module (BCM) fuse block. When a seat switch is pressed, battery positive voltage is applied through the switch contacts and the switch signal circuit to the memory seat module (MSM). The MSM then commands the selected seat motor to move in response to the switch signal.

Memory Function Switch

Battery positive voltage is supplied at all times to the memory function switch from the TILT/TELE SW/MEM SEAT MOD fuse located in the body control module (BCM) fuse block. When a memory recall switch is pressed battery positive voltage is applied through the switch contacts and the switch signal circuit to the memory seat module (MSM). The MSM then commands the appropriate seat motors to move to the pre-recorded seat position stored in memory in response to the switch signal.

MSM Power and Ground

Battery positive voltage is supplied at all times to the memory seat module (MSM) through the battery positive voltage circuit from the POWER SEATS circuit breaker located instrument panel (I/P) fuse block. This voltage is used to power up MSM and also to apply power to the seat motors when commanded. Battery positive voltage from the TILT/TELE SW/MEM SEAT MOD fuse located in the body control module (BCM) fuse block that supplies voltage to the seat adjuster switch and the memory function switch, also supplies voltage to the MSM. The MSM monitors this voltage circuit in order to determine if battery voltage is supplied to the seat adjuster switch. The MSM is grounded through the module ground circuit and G301.

Seat Motors

The memory seat module (MSM) controls the movement of each of the above mentioned seat directional motors. All of the seat motors operate independently of each other. Each motor contains a electronic circuit breaker (PTC), that opens in the event of a circuit overload and will reset only after voltage has been removed from the circuit.

There are 4 motors that move the position of the seat. These are the seat horizontal motor, front vertical motor, rear vertical motor, and the recline motor. The horizontal motor moves the entire seat forward and rearward. The seat vertical motors may operate independently to tilt the front or rear of the seat cushion up or down. Both vertical motors can also run simultaneously to move the entire seat up or down. The recline motor moves the angle of the seat back forward or rearward.

All motors are reversible. For example, when the seat switch is operated to moved the entire seat forward, battery positive voltage is applied through the horizontal forward switch contacts and the power seat horizontal forward switch signal circuit to the MSM. In response to this signal, the MSM applies battery positive voltage through the driver seat horizontal motor forward control circuit to the horizontal motor. The MSM supplies ground to the motor through the driver seat horizontal motor rearward control circuit. The motor runs to drive the entire seat forward until the switch is released. Moving the entire seat rearward works similarly to moving the entire seat forward, except that battery positive voltage and ground are applied on the opposite circuits causing the motor to run in the opposite direction. All other seat motors are also powered this way.

The MSM provides each seat motor with a soft stop. The module will actually stop the motor just before the physical end-of-travel for that motor. This decreases the stress on each motor. If a motor reaches the end-of-travel due a soft stop and the seat switch is released and then activated again, the seat will move a short distance farther to it's physical travel limit.

Position Sensors

The seat position sensors are potentiometers which are either attached directly to the motor's transmission cable or are an internal part of the motor. The memory seat module (MSM) supplies a 5-volt reference voltage through the 5-volt reference circuit and ground through the low reference circuit to the respective seat position sensors. When the motor or cable rotates, the resistance of the potentiometer varies changing the feedback voltage of the position sensor signal circuit. This voltage varies from 0.25 volts to 4.75 volts. The MSM monitors this voltage signal to determine the position of the seat.

When a memory set command is received, the MSM records the seat position by storing the feedback voltage from each position sensor. Then, when a memory recall command is received, the MSM moves the motors until the position sensor feedback voltages equals the feedback voltages stored in memory.

Memory Functions

The current seat position may be recorded for 2 different drivers. To record a position, adjust the drivers seat to a comfortable position, then press and hold button 1 until a chime is heard. A second seat position may be programmed by repeating the above steps and pressing button 2. When the memory seat module (MSM) receives a memory set message, it records the feedback voltages from all 4 seat position sensors for the appropriate driver. The easy exit position is programmed by moving the seat to the desired exit position and then press and hold the exit button until the chime is heard. Two easy exit positions can be programmed, one for each driver. When the MSM receives a set exit message, it records the feedback voltages from all 4 seat position sensors for the appropriate driver.

When the memory 1 or 2 button is pressed, the MSM applies battery positive voltage to run the seat motors until the position sensor feedback voltages equal the feedback voltages stored in memory for the appropriate driver. When the EXIT button is pressed, the MSM applies battery positive voltage to run the seat motors until the position sensor feedback voltages equal the feedback voltages stored in memory for the appropriate driver exit position.

Memory recall will not work if the shift lever is out of NEUTRAL (N) or PARK (P).

Recall Personalization

Specific drivers are recognized by the vehicle through the keyless entry transmitters. When the transmitter is used in order to unlock the vehicle doors, it sends a radio frequency to the remote control door lock receiver (RCDLR). The RCDLR interprets the signal, then communicates the unlock command and which driver performed the command via a class 2 message over the serial data line to the appropriate modules and the memory seat module (MSM). The MSM will then recall any previously programed personalization easy exit or memory seat positions. For more information concerning the programing of the personalization feature refer to Driver Personalization in Personalization.

Memory Inhibit/Enable

The memory seat module (MSM) receives the ignition switch signal and the gear selector position via class 2 messages. When the ignition switch is in the OFF position, memory record, memory recall, personalization recall, and exit recall functions are all allowed. When the ignition switch is in the ON position and the gear selector is in PARK, the personalization recall function is deactivated, while all other memory functions are allowed. When the ignition switch is in the ON position and the gear selector is out of the PARK position, all memory seat recall functions are inhibited, only memory set is allowed.

After an air bag deployment, the sensing and diagnostic module (SDM) will send out a post air bag deployment signal via the class 2 serial data line. After receiving this message, the MSM will inhibit all memory recall functions, or cancel any memory recall function in process.

See also:
• Diagnostic System Check - Vehicle
• Testing for Intermittent Conditions and Poor Connections
• Circuit Testing
• Wiring Repairs
• Connector Repairs
• Control Module References
• Checking Aftermarket Accessories
• HVAC Connector End Views
• SIR Disabling and Enabling
• Fastener Notice
• Passenger Presence System Programming and Setup
• Driver Seat Speaker Grille Replacement
• Driver Personalization
• DTC B1336
• Symptoms - Seats
• Power Seats System Description and Operation
• Lumbar Support Description and Operation
• Heated/Cooled Seats Description and Operation
• Memory Seats Description and Operation
• Power Seat Inoperative (w/o A45)
• Memory Seat Calibration