Seat System Cadillac CTS I

Fastener Tightening Specifications

Fastener Tightening Specifications

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Scheme 17

Heated Seat Element Connector End - Driver Seat Back Connector Part Information 12059248 2-Way M Metri-Pack 150 Series (GY) Pin Wire Color Circuit No. Function A YE 9529 Heated Seat Element Supply Voltage B YE 9530 Heated Seat Element Control

Heated Seat Element Connector End - Driver Seat Cushion - Front Connector Part Information 12059248 2-Way M Metri-Pack 150 Series (GY) Pin Wire Color Circuit No. Function A YE 9529 Heated Seat Element Supply Voltage B YE 9529 Heated Seat Element Supply Voltage

Heated Seat Element Connector End - Front Passenger Seat Back Connector Part Information 12059248 2-Way M Metri-Pack 150 Series (GY) Pin Wire Color Circuit No. Function A YE 9529 Heated Seat Element Supply Voltage B YE 9530 Heated Seat Element Control

Heated Seat Element Connector End - Front Passenger Seat Cushion - Front Connector Part Information 12059248 2-Way M Metri-Pack 150 Series (GY) Pin Wire Color Circuit No. Function A YE 9529 Heated Seat Element Supply Voltage B YE 9529 Heated Seat Element Supply Voltage

Heated Seat Module Connector End - Driver C1 (KA1) Connector Part Information 12064769 10-Way F Metri-Pack 150 Series (WH) Pin Wire Color Circuit No. Function A OG 2440 Battery Positive Voltage B BN 41 Ignition 3 Voltage C L-BU/WH 181 Heated Seat Control Module Status Signal D - - Not Used E PK 1501 Driver Heated Seat High/Low Signal F-J - - Not Used K BK 650 Ground

Heated Seat Module Connector End - Driver C2 (KA1) Connector Part Information 12064762 6-Way F Metri-Pack 150 Series (WH) Pin Wire Color Circuit No. Function A BK/RD 9529 Heated Seat Element Supply Voltage B - - Not Used C BK/RD 9530 Heated Seat Element Control D YE 9534 Heated Seat Temperature Sensor Low Reference E - - Not Used F YE 9533 Heated Seat Temperature Sensor Signal

Heated Seat Module Connector End - Front Passenger C1 (KA1) Connector Part Information 12064769 10-Way F Metri-Pack 150 Series (WH) Pin Wire Color Circuit No. Function A OG 2540 Battery Positive Voltage B BN 41 Ignition 3 Voltage C L-BU/WH 2181 Passenger Heated Seat Control Module Status Signal D - - Not Used E PK 1503 Passenger Heated Seat High/Low Signal F-J - - Not Used K BK 550 Ground

Heated Seat Module Connector End - Front Passenger C2 (KA1) Connector Part Information 12064762 6-Way F Metri-Pack 150 Series (WH) Pin Wire Color Circuit No. Function A YE 9529 Heated Seat Element Supply Voltage B - - Not Used C YE 9530 Heated Seat Element Control D BK/RD 9534 Heated Seat Temperature Sensor Low Reference E - - Not Used F BK/RD 9533 Heated Seat Temperature Sensor Signal

Lumbar Adjuster Switch Connector End - Driver (AL2) Connector Part Information 12041429 5-Way F Metri-Pack 280 Series (BK) Pin Wire Color Circuit No. Function A - - Not Used B YE 1065 Driver Seat Lumbar Forward Switch Signal C - - Not Used D OG 2840 Battery Positive Voltage E D-BU 1064 Driver Seat Lumbar Rearward Switch Signal

Lumbar Adjuster Switch Connector End - Passenger (AL2) Connector Part Information 12041429 5-Way F Metri-Pack 280 Series (BK) Pin Wire Color Circuit No. Function A BK 550 Ground B D-BU 211 Passenger Seat Lumbar Motor Forward Control C BK 550 Ground D OG 3740 Battery Positive Voltage E WH 210 Passenger Seat Lumbar Motor Rearward Control

Lumbar Horizontal Motor Assembly Connector End - Driver (AL2) Connector Part Information 12064754 6-Way M Metri-Pack 280 Series (BK) Pin Wire Color Circuit No. Function A D-BU 611 Driver Seat Lumbar Motor Forward Control B PK 610 Driver Seat Lumbar Motor Rearward Control C BK 782 Memory Seat Sensor Low Reference D GY 788 5 Volt Reference E YE 1063 Driver Seat Lumbar Horizontal Position Sensor Signal F - - Not Used

Lumbar Horizontal Motor Connector End - Passenger (AL2) Connector Part Information 12034344 2-Way F Metri-Pack 280 Series (BK) Pin Wire Color Circuit No. Function A D-BU 211 Passenger Seat Lumbar Motor Forward Control B WH 210 Passenger Seat Lumbar Motor Rearward Control

Memory/Personalization Function Switch (A45) Connector End Connector Part Information 15364004 4-Way F (BK) Pin Wire Color Circuit No. Function 1 YE 1491 Backlight Lamps Control 2 PU 616 Memory 2 Switch Signal 3 BK/WH 351 Ground 4 WH 615 Memory 1 Switch Signal

Memory Seat Module (MSM) C1 (A45) Connector End Connector Part Information 12064749 2-Way F Metri-Pack 480 Series (BK) Pin Wire Color Circuit No. Function A OG 3740 Battery Positive Voltage B BK 550 Ground

Memory Seat Module (MSM) C2 (A45) Connector End Connector Part Information 12110112 32-Way F Micro-Pack 100 Series (TN) Pin Wire Color Circuit No. Function E1 D-GN 1518 Power Seat Front Vertical Up Switch Signal E2 YE 1519 Power Seat Rear Vertical Up Switch Signal E3 D-BU 1520 Power Seat Front Vertical Down Switch Signal E4 L-BU 1521 Power Seat Rear Vertical Down Switch Signal E5 TN 1522 Power Seat Horizontal Forward Switch Signal E6 L-GN 1523 Power Seat Horizontal Rearward Switch Signal E7 L-GN 276 Driver Seat Recline Forward Switch Signal E8 L-BU 277 Driver Seat Recline Rearward Switch Signal E9 D-BU 1064 Driver Seat Lumbar Rearward Switch Signal (AL2) E10 YE 1065 Driver Seat Lumbar Forward Switch Signal (AL2) E11-E12 - - Not Used E13 GY 788 5-Volt Reference E14 BN/WH 557 Front Vertical Seat Motor Position Sensor Signal E15 BK 782 Memory Seat Sensor Low Reference E16 D-GN 569 Horizontal Seat Motor Position Sensor Signal F1 TN 568 Rear Vertical Seat Motor Position Sensor Signal F2 WH/BK 570 Driver Seat Recline Motor Position Sensor Signal F3 YE 1063 Driver Seat Lumbar Horizontal Position Sensor Signal (AL2) F4-F10 - - Not Used F11 OG 2840 Battery Positive Voltage F12-F13 - - Not Used F14 PU 1807 Class 2 Serial Data F15-F16 - - Not Used

Memory Seat Module (MSM) C3 (A45) Connector End Connector Part Information 12129431 16-Way F Metri-Pack 280 Series (BK) Pin Wire Color Circuit No. Function A D-GN 286 Driver Seat Front Vertical Motor Up Control B D-BU 611 Driver Seat Lumbar Motor Forward Control (AL2) C-E - - Not Used F L-GN 276 Driver Seat Recline Motor Forward Control G L-BU 277 Driver Seat Recline Motor Rearward Control H-K - - Not Used L PK 610 Driver Seat Lumbar Motor Rearward Control (AL2) M D-BU 287 Driver Seat Front Vertical Motor Down Control N TN 285 Driver Seat Horizontal Motor Forward Control P L-BU 283 Driver Seat Rear Vertical Motor Down Control R YE 282 Driver Seat Rear Vertical Motor Up Control S L-GN 284 Driver Seat Horizontal Motor Rearward Control

Seat Adjuster Switch Connector End - Driver (LHD w/o A45) Connector Part Information 15326110 12-Way F 280 GT Series (BK) Pin Wire Color Circuit No. Function A D-BU 77 Driver Seat Recline Motor Rearward Control B D-GN 76 Driver Seat Recline Motor Forward Control C BK 550 Ground D L-GN 290 Driver Seat Horizontal Motor Rearward Control E TN 296 Driver Seat Horizontal Motor Forward Control F OG 3740 Battery Positive Voltage G-H - - Not Used J L-BU 289 Driver Seat Rear Vertical Motor Down Control K YE 288 Driver Seat Rear Vertical Motor Up Control L D-BU 298 Driver Seat Front Vertical Motor Down Control M D-GN 297 Driver Seat Front Vertical Motor Up Control

Seat Adjuster Switch Connector End - Driver (RHD w/o A45) Connector Part Information 15326110 12-Way F 280 GT Series (BK) Pin Wire Color Circuit No. Function A OG 3740 Battery Positive Voltage B L-GN 290 Driver Seat Horizontal Motor Rearward Control C TN 296 Driver Seat Horizontal Motor Forward Control D BK 550 Ground E D-BU 77 Driver Seat Recline Motor Rearward Control F D-GN 76 Driver Seat Recline Motor Forward Control G D-BU 298 Driver Seat Front Vertical Motor Down Control H D-GN 297 Driver Seat Front Vertical Motor Up Control J L-BU 289 Driver Seat Rear Vertical Motor Down Control K YE 288 Driver Seat Rear Vertical Motor Up Control L-M - - Not Used

Seat Adjuster Switch Connector End - Driver (LHD w/A45) Connector Part Information 15326110 12-Way F 280 GT Series (BK) Pin Wire Color Circuit No. Function A L-BU 277 Driver Seat Recline Rearward Switch Signal B L-GN 276 Driver Seat Recline Forward Switch Signal C - - Not Used D L-GN 1523 Power Seat Horizontal Rearward Switch Signal E TN 1522 Power Seat Horizontal Forward Switch Signal F OG 2840 Battery Positive Voltage G-H - - Not Used J L-BU 1521 Power Seat Rear Vertical Down Switch Signal K YE 1519 Power Seat Rear Vertical Up Switch Signal L D-BU 1520 Power Seat Front Vertical Down Switch Signal M D-GN 1518 Power Seat Front Vertical Up Switch Signal

Seat Adjuster Switch Connector End - Driver (RHD w/A45) Connector Part Information 15326110 12-Way F 280 GT Series (BK) Pin Wire Color Circuit No. Function A OG 2840 Battery Positive Voltage B L-GN 1523 Power Seat Horizontal Rearward Switch Signal C TN 1522 Power Seat Horizontal Forward Switch Signal D - - Not Used E L-BU 277 Driver Seat Recline Rearward Switch Signal F L-GN 276 Driver Seat Recline Forward Switch Signal G D-BU 1520 Power Seat Front Vertical Down Switch Signal H D-GN 1518 Power Seat Front Vertical Up Switch Signal J L-BU 1521 Power Seat Rear Vertical Down Switch Signal K YE 1519 Power Seat Rear Vertical Up Switch Signal L-M - - Not Used

Seat Adjuster Switch Connector End - Passenger (LHD w/AH8) Connector Part Information 15326110 12-Way F 280 GT Series (BK) Pin Wire Color Circuit No. Function A OG 3740 Battery Positive Voltage B L-GN 290 Passenger Seat Horizontal Motor Rearward Control C TN 296 Passenger Seat Horizontal Motor Forward Control D BK 550 Ground E L-BU 77 Passenger Seat Recline Motor Rearward Control F L-GN 76 Passenger Seat Recline Motor Forward Control G D-BU 298 Passenger Seat Front Vertical Motor Down Control H D-GN 297 Passenger Seat Front Vertical Motor Up Control J L-BU 289 Passenger Seat Rear Vertical Motor Down Control K YE 288 Passenger Seat Rear Vertical Motor Up Control L-M - - Not Used

Seat Adjuster Switch Connector End - Passenger (RHD w/AH8) Connector Part Information 15326110 12-Way F 280 GT Series (BK) Pin Wire Color Circuit No. Function A D-BU 77 Passenger Seat Recline Motor Rearward Control B D-GN 76 Passenger Seat Recline Motor Forward Control C BK 550 Ground D L-GN 290 Passenger Seat Horizontal Motor Rearward Control E TN 296 Passenger Seat Horizontal Motor Forward Control F OG 3740 Battery Positive Voltage G-H - - Not Used J L-BU 289 Passenger Seat Rear Vertical Motor Down Control K YE 288 Passenger Seat Rear Vertical Motor Up Control L D-BU 298 Passenger Seat Front Vertical Motor Down Control M D-GN 297 Passenger Seat Front Vertical Motor Up Control

Seat Front Vertical Motor Connector End - Driver Connector Part Information 12064749 2-Way F Metri-Pack 480 Series (GY) Pin Wire Color Circuit No. Function A D-BU 287 Driver Seat Front Vertical Motor Down Control (LHD w/A45) D-GN 286 Driver Seat Front Vertical Motor Up Control (RHD w/A45) D-BU 298 Driver Seat Front Vertical Motor Down Control (w/o A45) B D-GN 286 Driver Seat Front Vertical Motor Up Control (LHD w/A45) D-BU 287 Driver Seat Front Vertical Motor Down Control (RHD w/A45) D-GN 297 Driver Seat Front Vertical Motor Up Control (w/o A45)

Seat Front Vertical Motor Connector End - Passenger (AH8) Connector Part Information 12064749 2-Way F Metri-Pack 480 Series (BK) Pin Wire Color Circuit No. Function A D-GN 298 Passenger Seat Front Vertical Motor Down Control B D-BU 297 Passenger Seat Front Vertical Motor Up Control

Seat Front Vertical Position Sensor Connector End - Driver (A45) Connector Part Information 12059584 3-Way F Metri-Pack 150 Series (BK) Pin Wire Color Circuit No. Function A - - Unavailable B BK 782 Memory Seat Sensor Low Reference (LHD) GY 788 5-Volt Reference (RHD) C BN/WH 557 Front Vertical Seat Motor Position Sensor Signal D GY 788 5 Volt Reference (LHD) BK 782 Memory Seat Sensor Low Reference (RHD)

Seat Horizontal Motor Connector End - Driver Connector Part Information 12129081 2-Way F Metri-Pack 280 Series Flexlock (BK) Pin Wire Color Circuit No. Function A TN 285 Driver Seat Horizontal Motor Forward Control (LHD w/A45) L-GN 284 Driver Seat Horizontal Motor Rearward Control (RHD w/A45) TN 296 Driver Seat Horizontal Motor Forward Control (LHD w/o A45) L-GN 290 Driver Seat Horizontal Motor Rearward Control (RHD w/o A45) B L-GN 284 Driver Seat Horizontal Motor Rearward Control (LHD w/A45) TN 285 Driver Seat Horizontal Motor Forward Control (RHD w/A45) L-GN 290 Driver Seat Horizontal Motor Rearward Control (LHD w/o A45) TN 296 Driver Seat Horizontal Motor Forward Control (RHD w/o A45)

Seat Horizontal Motor Connector End - Passenger (AH8) Connector Part Information 12129081 2-Way F Metri-Pack 280 Series Flexlock (BK) Pin Wire Color Circuit No. Function A L-GN 290 Passenger Seat Horizontal Motor Rearward Control (LHD) TN 296 Passenger Seat Horizontal Motor Forward Control (RHD) B TN 296 Passenger Seat Horizontal Motor Forward Control (LHD) L-GN 290 Passenger Seat Horizontal Motor Rearward Control (RHD)

Seat Horizontal Position Sensor Connector End - Driver (A45) Connector Part Information 12059581 3-Way F Metri-Pack 150 Series (GY) Pin Wire Color Circuit No. Function A GY 788 5-Volt Reference (LHD) BK 782 Memory Seat Sensor Low Reference (RHD) B D-GN 569 Horizontal Seat Motor Position Sensor Signal C BK 782 Memory Seat Sensor Low Reference (LHD) GY 788 5-Volt Reference (RHD) D - - Unavailable

Seat Rear Vertical Motor Connector End - Driver Connector Part Information 12064749 2-Way F Metri-Pack 480 Series (GY) Pin Wire Color Circuit No. Function A YE 282 Driver Seat Rear Vertical Motor Up Control (LHD w/A45) L-BU 283 Driver Seat Rear Vertical Motor Down Control (RHD w/A45) YE 288 Driver Seat Rear Vertical Motor Up Control (LHD w/o A45) L-BU 289 Driver Seat Rear Vertical Motor Down Control (RHD w/o A45) B L-BU 283 Driver Seat Rear Vertical Motor Down Control (LHD w/A45) YE 282 Driver Seat Rear Vertical Motor Up Control (RHD w/A45) L-BU 289 Driver Seat Rear Vertical Motor Down Control (LHD w/o A45) YE 288 Driver Seat Rear Vertical Motor Up Control (RHD w/o A45)

Seat Rear Vertical Motor Connector End - Passenger (AH8) Connector Part Information 12064749 2-Way F Metri-Pack 480 Series (GY) Pin Wire Color Circuit No. Function A L-BU 289 Passenger Seat Rear Vertical Motor Down Control (LHD) YE 288 Passenger Seat Rear Vertical Motor Up Control (RHD) B YE 288 Passenger Seat Rear Vertical Motor Up Control (LHD) L-BU 289 Passenger Seat Rear Vertical Motor Down Control (RHD)

Seat Rear Vertical Position Sensor Connector End - Driver (A45) Connector Part Information 12059582 3-Way F Metri-Pack 150 Series (BU) Pin Wire Color Circuit No. Function A GY 788 5-Volt Reference (LHD) BK 782 Memory Seat Sensor Low Reference (RHD) B TN 568 Rear Vertical Seat Motor Position Sensor Signal C - - Unavailable D BK 782 Memory Seat Sensor Low Reference (LHD) GY 788 5-Volt Reference (RHD)

Seat Recline Motor Connector End - Driver Connector Part Information 12129082 2-Way F Metri-Pack 280 Series, Flexlock (BK) Pin Wire Color Circuit No. Function A L-GN 276 Driver Seat Recline Motor Forward Control (w/A45) D-GN 76 Driver Seat Recline Motor Forward Control (w/o A45) B L-BU 277 Driver Seat Recline Motor Rearward Control (w/A45) D-BU 77 Driver Seat Recline Motor Rearward Control (w/o A45)

Seat Recline Motor Connector End - Passenger (AH8) Connector Part Information 12129082 2-Way F Metri-Pack 280 Series, Flexlock (BK) Pin Wire Color Circuit No. Function A L-GN 76 Passenger Seat Recline Motor Forward Control B L-BU 77 Passenger Seat Recline Motor Rearward Control

Seat Recline Position Sensor Connector End - Driver (A45) Connector Part Information 12059583 3-Way F Metri-Pack 150 Series (WH) Pin Wire Color Circuit No. Function 1 BK 782 Memory Seat Sensor Low Reference 2 GY 788 5-Volt Reference 3 WH/BK 570 Driver Seat Recline Motor Position Sensor Signal

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 seats, begin diagnosis with the Diagnostic System Check - Power Seat Systems . 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.

Test Description

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

1. 2: Lack of communication may be due to a partial malfunction of the class 2 serial data circuit or due to a total malfunction of the class 2 serial data circuit. The specified procedure will determine the particular condition.
2. 4: The Symptom Table will determine the correct diagnostic procedure to use.
3. 5: The presence of DTCs which begin with "U" indicate some other module is not communicating. The specified procedure will compile all the available information before tests are performed.
4. 6: This step determines if any internal controller DTCs are set.
5. 7: This steps determines if any system voltage DTCs are set.

Diagnostic System Check - Power Seat Systems

Scan Tool Output Controls

Memory Seat Module (MSM) Scan Tool Output Controls

Rear Integration Module (RIM) Scan Tool Output Controls

Scan Tool Data List

Memory Seat Module (MSM) Scan Tool Data List

Driver Door Switch Assembly (DDSA) Scan Tool Data List

Rear Integration Module (RIM) Scan Tool Data List

Climate Control Panel Scan Tool Data List

Diagnostic Trouble Code (DTC) List

Diagnostic Trouble Code (DTC) List

Circuit Description

Battery positive voltage is supplied to the memory seat module (MSM) from the seats circuit breaker located in the left rear fuse block. When commanded, this voltage is used by the MSM 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. When an overcurrent condition is detected, the MSM disables the sea motors in order to protect the internal MSM circuitry.

Conditions for Running the DTC

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

Conditions for Setting the DTC

The MSM 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 will not respond to manual movements of the affected motor.

Conditions for Clearing the DTC

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

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) through the same circuit. The MSM uses this battery voltage input to determine if battery positive voltage is applied to the seat adjuster switch.

The MSM 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 detects less than 3 volts from the circuit.

1. The MSM ignores all memory recall commands.
2. All manual seat functions will operate.

The DTC will clear when the MSM detects that the voltage from the circuit is greater than 3 volts.

DTC B1420

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

The MSM 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 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 will set a switch DTC.

1. A motor output driven in response to a switch considered failed, is deactivated for both directions.
2. All memory recall command are ignored.
3. The MSM will respond to any other switch signal that has not set a DTC.

The DTC automatically clears when the switch circuit setting the DTC is no longer active.

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). The sensor sends a voltage signal that varies with the movement of the seat through the signal circuit to the MSM. Then based on this voltage signal, the MSM determines the position of the seat.

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

If the MSM 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 will set this DTC.

The MSM disables all memory recall commands of the motor monitored by the sensor. The motor will respond to manual positioning commands.

The MSM will clear the DTC when it detects that the voltage from the sensor signal circuit is between 0.25 volts and 4.75 volts.

Diagnostic Aids

1. All position sensors use common low reference and 5-volt reference circuits.
2. If the 5-volt reference circuit is shorted to voltage multiple codes will set.
3. If the 5-volt reference circuit is shorted to ground multiple codes will set.
4. 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, B1860, 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). The sensor sends a voltage signal that varies with the movement of the seat through the sensor signal circuit to the MSM. Then based on this voltage signal, the MSM determines the position of the seat.

1. The MSM 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 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 will set this DTC.

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

The MSM will clear the DTC as an active DTC, whenever a manual switch is activated and the MSM senses that the voltage from the sensor signal changes by more than 2 counts or 0.04 volts in the correct direction.

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 power seat switches are pressed they send a 12 volt signal to the memory seat module (MSM). The MSM commands the driver seat to move in response to the switch inputs.

The MSM must be powered and can not have DTC B1327 - Device Power 1 Circuit Low as an active DTC for this DTC to set.

1. If a seat switch circuit 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 will set the 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 will set a switch DTC.
3. A switch DTC will not set if DTC B1327 is current.

1. A motor output driven in response to a switch considered failed, is deactivated for both directions.
2. All memory recall commands are ignored.
3. The MSM will respond to any other switch input that has not set a DTC.

The DTC automatically clears when the switch circuit setting the DTC is no longer active.

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

1. 2: Checks the existing state of the driver's seat lumbar switch by using the current state of the input parameter. If all of the lumbar switch parameters display active, possibly one of the lumbar switch signal circuits is shorted to voltage.
2. 4: When the lumbar switch is disconnected, this step determines if the switch contacts are stuck closed, or if one of the switch signal circuits is possibly shorted to voltage.
3. 10: This step verifies the repair.

DTC B1830, B1835, B1840 or B1845

The memory function switches are normally open and are wired to the driver door switch assembly (DDSA). When a memory recall switch is pressed, the switch pulls the 5-volt signal circuit from the DDSA low. The DDSA senses that a memory recall signal was pulled low and a class 2 message is sent out identifying that the circuit is active.

The DDSA must be powered and can not have B1328 - Battery Voltage High or B1327 - Battery Voltage Low as active DTCs for this DTC to set.

If a memory switch signal circuit is active for more that 30 continuous seconds, the circuit will be considered shorted, and the DDSA will set this DTC.

The DDSA ignores the invalid switch signal from the memory function switch and will not respond to it. The DDSA will respond to all other valid switch signals.

The DTC automatically clears when the switch circuit setting the DTC is no longer active.

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 memory switch parameter.
2. 9: 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/cts/i-2002-2007/remont/seats/#seat-system__power-seats-system-description-and-operation) «Lumbar Support Description and Operation (w/o A45)»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) or «Lumbar Support Description and Operation (with A45)»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) «Heated Seats Description and Operation»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system__heated-seats-description-and-operation) «Memory Seats Description and Operation»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system__memory-seats-description-and-operation)
2. If you are diagnosing a seat with memory (A45) perform the «Diagnostic System Check - Power Seat Systems»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) before using the symptom tables in order to verify that all of the following are true: There are no DTCs set. The control module(s) 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/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures__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/cts/i-2002-2007/remont/seats/#seat-system) or «Power Seat Inoperative (w/o A45)»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system__power-seat-inoperative-wo-a45)
2. «Memory Seat Feature Inoperative»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system)
3. «Lumbar Support Inoperative (w/o A45)»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system__lumbar-support-inoperative-wo-a45) or «Lumbar Support Inoperative (with A45)»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system)
4. «Heated Seat Always On»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system__heated-seat-always-on)
5. «Heated Seat Inoperative»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system)
6. «Heated Seat Temperature Adjustment Inoperative»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system__heated-seat-temperature-adjustment-inoperative)
7. «Heated Seat Switch Mode Indicator Malfunction»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system)

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

1. 3: This step verifies that Personalization in the driver information center (DIC) is active. Memory seats cannot function if personalization turned OFF. A check mark after personalization indicates that it is active.
2. 4: This step verifies that the Personalization Option in the dash integration module (DIM) is activated. Memory seats cannot function if the option is turned OFF. An asterisk beside the personalization option indicates that the option is activated.
3. 5: Turning ON the headlamps in this step eliminates the possibility of the memory function switch finding an alternative path to ground through the illumination circuit.
4. 8: This step tests the integrity of the memory 1 switch signal circuit of the driver door switch assembly. If the fuse in the jumper wire opens when you perform this test, a short to battery voltage may have occurred.
5. 10: This step tests the integrity of the memory 2 switch signal circuit of the driver door switch assembly. If the fuse in the jumper wire opens when you perform this test, a short to battery voltage may have occurred.

Memory Seat Feature Inoperative

Lumbar Support Inoperative (w/o A45)

Lumbar Support Inoperative (w/o A45)

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

1. 7: This step tests the integrity of the signal circuits of the seat lumbar switch. If the fuse in the jumper wire opens when you perform this test, a short to ground may have occurred.

Lumbar Support Inoperative (with A45)

Heated Seat Always On

Heated Seat Always On

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

1. 7: This step tests the integrity of the heated seat switch signal from the rear integration module. This signal is a momentary 35 millisecond one shot pulse signal that is monitored through a momentary voltage change in the voltmeter when the switch is pressed. In order to accurately recognize the change in voltage, the voltmeter reading should be stable before performing this test.

Heated Seat Inoperative

Heated Seat Temperature Adjustment Inoperative

Heated Seat Temperature Adjustment Inoperative

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

1. 4: This step tests the integrity of the heated seat control module status signal circuit. If the fuse in the jumper wire opens when you perform this test, a short to battery voltage may have occurred.

Heated Seat Switch Mode Indicator Malfunction

Removal Procedure

1. Disable the SIR System. Refer to «SIR Disabling and Enabling Zone 7»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) for driver's seat or «SIR Disabling and Enabling Zone 9»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) for passenger seat in SIR.
2. Move the front seat forward in order to access the front seat track trim cover (1).
3. Remove the seat track trim cover (1) from the seat track.
4. Remove the seat track fasteners from the seat track.
5. Disconnect the seat electrical connectors (1).
6. With the aid of an assistant, remove the seat from the vehicle.

Installation Procedure

1. With the aid of an assistant, install the seat into the vehicle.
2. Insert the front tabs (1) on the seat track into the floor.
3. Connect the electrical connectors (1).
4. Install the seat track fasteners. Tighten: Tighten the seat track fasteners to 30 N.m (22 lb ft).
5. Install the seat track trim covers (1).
6. Enable the SIR System. Refer to «SIR Disabling and Enabling Zone 7»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) for driver's seat or «SIR Disabling and Enabling Zone 9»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) for passenger seat in SIR.

1. Disable the SIR System. Refer to «SIR Disabling and Enabling Zone 7»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) driver's seat and «SIR Disabling and Enabling Zone 9»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) and passenger seat.
2. Move the seat to the full forward position.
3. Remove the retaining nuts (1) securing the seat cushion to the seat adjuster assembly.
4. Lift the front of the seat cushion upwards.
5. Remove the power seat switches. Refer to «Seat Switch Replacement - Power»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
6. Disconnect the wiring harness fastener and retainers securing the wiring harness to the bottom of the seat cushion frame.
7. Pull the cushion forward in order to remove the seat cushion from the seat adjuster assembly.

1. Insert the seat cushion locators, at the rear of the seat cushion frame, into the rectangular openings in the seat adjuster assembly.
2. Secure the wiring harness to the seat cushion frame in the same position in which it was removed.
3. Install the power seat switches. Refer to «Seat Switch Replacement - Power»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system)
4. Lower the front of the seat cushion down into position onto the seat adjuster assembly.
5. Install the seat cushion nuts (1). Tighten: Tighten the nuts (1) to 10 N.m (88 lb in).
6. Enable the SIR. Refer to «SIR Disabling and Enabling Zone 7»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) driver's seat and «SIR Disabling and Enabling Zone 9»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) and passenger seat.

1. Disable the SIR System. Refer to «SIR Disabling and Enabling Zone 7»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) driver's seat and «SIR Disabling and Enabling Zone 9»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) and passenger seat.
2. Remove the seat cushion from the seat assembly. Refer to «Seat Cushion Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
3. Turn the seat cushion upside down on a clean protected surface.
4. Release the seat cushion cover J channels (1) from the seat cushion frame.
5. Remove the seat cushion cover (3).
6. Remove the seat cushion pad (2).

1. Install the seat cushion pad (2) to the seat cushion frame (1).
2. Install the seat cushion cover (3) over the seat cushion pad (2).
3. Work the seat cushion pad (2) into position so there are no wrinkles or lumps in the seat cushion cover (3).
4. Ensure the hook and loop fasteners on the seat cushion cover and the seat cushion pad are fully engaged in order to ensure proper fit of the seat cushion cover (3).
5. Turn the seat cushion assembly over.
6. Install the seat cushion cover J channels (1) to the seat cushion frame.
7. Install the seat cushion to the seat assembly. Refer to «Seat Cushion Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
8. Enable the SIR system. Refer to «SIR Disabling and Enabling Zone 7»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) driver's seat and «SIR Disabling and Enabling Zone 9»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) and passenger seat.

1. Remove the seat back trim. Refer to «Seat Back Trim Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
2. Remove the head restraint. Refer to «Head Restraint Replacement - Front Seat»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
3. Remove the head restraint retainers. Refer to «Head Restraint Retainer Replacement - Front Seat»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
4. Remove the inflatable restraint side impact module. Refer to «Inflatable Restraint Side Impact Module Replacement - Front»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) in SIR.
5. Disconnect the heated seat electrical connector to the seat back.
6. Remove all of the seat back cover J channels retaining the seat back cover and pad to the seat back frame.
7. Remove the seat cover (1) and cushion (2) from the seat back frame.
8. Remove the seat back cover (1) from the seat back cushion (2).

1. Install the seat back cover (1) to the seat back cushion (2).
2. Position the seat back cover and pad (1,2) to the seat back frame.
3. Install the J channels to seat back frame.
4. Connect the heated seat electrical connectors.
5. Install the inflatable restraint side impact module. Refer to «Inflatable Restraint Side Impact Module Replacement - Front»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) in SIR.
6. Install the head restraint retainers. Refer to «Head Restraint Retainer Replacement - Front Seat»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
7. Install the head restraint. Refer to «Head Restraint Replacement - Front Seat»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
8. Install the seat back trim. Refer to «Seat Back Trim Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .

Seat Back Frame Replacement - Front

1. Remove the front bucket seat. Refer to «Seat Replacement - Bucket»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
2. Remove the seat cushion from seat. Refer to «Seat Cushion Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
3. Remove the push-in retainer (1) from the trim covers.
4. Remove the trim covers.
5. Remove the seat back cover and pad. Refer to «Seat Back Cover and Pad Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
6. Remove the front seat belt assembly. Refer to «Seat Belt Replacement - Front»(/cadillac/cts/i-2002-2007/remont/restraints-control-systems/#seat-belt-system) .
7. Disconnect and remove the remaining electrical connectors are attached to the seat back frame.
8. Remove the bolt retaining the seat back frame to the riser.
9. Remove the bolts (1) retaining the seat back frame to the recliner.
10. Lift up on the seat back frame in order to disengage the seat back from the recliner.

1. Slide the seat back frame down into the recliner and align the fasteners holes.
2. Install the seat back to recliner bolts (1). Tighten: Tighten the bolts to 52 N.m (38 lb ft).
3. Install the seat back to riser bolt (1). Tighten: Tighten the bolt to 35 N.m (26 lb ft).
4. Install the front seat belt assembly. Refer to «Seat Belt Replacement - Front»(/cadillac/cts/i-2002-2007/remont/restraints-control-systems/#seat-belt-system) .
5. Install the seat back cover and pad. Refer to «Seat Back Cover and Pad Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
6. Install the trim covers.
7. Install the push-in retainer (1) to secure the trim cover.
8. Install the front seat cushion. Refer to «Seat Cushion Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
9. Route and connect the electrical connectors to the seat back.
10. Install the front seat. Refer to «Seat Replacement - Bucket»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .

1. Remove the seat. Refer to «Seat Replacement - Bucket»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
2. Remove the seat back frame. Refer to «Seat Back Frame Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system__seat-back-frame-replacement-front) .
3. Remove the seat cushion. Refer to «Seat Cushion Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
4. Disconnect the recliner motor electrical connectors.
5. Remove the seat axle retainers (3).
6. Pull the seat track sides apart in order to separate the seat track sides.
7. Remove the nuts (1) securing the recliner to the seat track.

1. Install the nuts (1) securing the recliner to the seat track. Tighten: Tighten the nut to 65 N.m (18 lb ft).
2. Locate the axles and the seat position drive cable (2) in order to connect the seat track sides. IMPORTANT: Insure that the seat position motor cable is fully seated into the drive gear.
3. Install the seat axle retainers (3).
4. Connect the recliner motor electrical connectors.
5. Install the seat cushion. Refer to «Seat Cushion Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
6. Install the seat back frame. Refer to «Seat Back Frame Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system__seat-back-frame-replacement-front) .
7. Install the seat. Refer to «Seat Replacement - Bucket»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
8. Calibrate the seat. Refer to «Memory Seat Calibration Procedure»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system__memory-seat-calibration-procedure) .

1. Remove the front seat. Refer to «Seat Replacement - Bucket»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
2. Disconnect the electrical connector from the sensor (2).
3. Rotate the sensor counterclockwise and remove it (1).

1. Install the sensor (1) in the motor and rotate it clockwise until it locks in to place.
2. Connect the electrical connector (2) to the sensor.

1. Remove the front bucket seat. Refer to «Seat Replacement - Bucket»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
2. Remove the power recliner position sensor. Refer to «Power Recliner Sensor Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
3. Disconnect the electrical connector from the motor.
4. Remove the recliner motor retaining nuts (1).
5. Slide the motor off of the shaft.

1. Slide the recliner motor on to the shaft
2. Install the recliner motor nuts (1). Tighten: Tighten the nuts to 10 N.m (88 lb in).
3. Install the electrical connector.
4. Install the recliner position sensor. Refer to «Power Recliner Sensor Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
5. Install the seat into the vehicle. Refer to «Seat Replacement - Bucket»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .

1. Grasp the top portion of the seat back trim panel and pull out to release the push-in fasteners.
2. Firmly lift upwards to remove the seat back trim from the seat assembly.

1. Position the lower hooks on the seat back trim panel to the seat assembly.
2. Firmly push inwards on the top of the trim cover to secure the push-in fasteners.

1. Remove the seat back trim. Refer to «Seat Back Trim Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
2. Disconnect the lumbar motor (1) electrical connector.
3. Push in on the lumbar assembly (2) and disengage the assembly from the seat frame.
4. Remove the lumbar assembly.

1. Install the lumbar assembly (2) to the seat frame.
2. Connect the electrical connector (1) to the lumbar motor.
3. Install the seat back trim. Refer to «Seat Back Trim Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .

1. Remove the seat track trim cover (1) from the seat.
2. Disconnect the lumbar switch (2) electrical connector.
3. Remove the lumbar switch.

1. Install the lumbar switch (2) into the seat track trim cover (1).
2. Connect the electrical connector.
3. Install the seat track trim cover to the seat.

1. Remove the front bucket seat. Refer to «Seat Replacement - Bucket»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
2. Remove the front seat cushion. Refer to «Seat Cushion Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
3. Remove the seat back frame. Refer to «Seat Back Frame Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system__seat-back-frame-replacement-front) .

1. Install the seat back frame to the seat adjuster. Refer to «Seat Back Frame Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system__seat-back-frame-replacement-front)
2. Install the front seat cushion. Refer to «Seat Cushion Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system)
3. Install the front bucket seat. Refer to «Seat Replacement - Bucket»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system)
4. If the vehicle is equipped with memory seats, calibrate the seat. Refer to «Memory Seat Calibration Procedure»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system__memory-seat-calibration-procedure) .

1. Disable the SIR system. Refer to «SIR Disabling and Enabling Zone 7»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) driver's seat and «SIR Disabling and Enabling Zone 9»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) and passenger seat.
2. Remove the seat cushion from the adjuster track enough to gain access to the power seat switch. Refer to «Seat Cushion Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
3. Remove the knobs from the switch by gently prying them off using a flat bladed tool.
4. On the underside of the seat cushion, locate the retainers (1) securing the power seat switch bezel to the seat cushion frame (3).
5. Squeeze the retainers while gently prying the bezel from the seat cushion frame.
6. Remove the power seat switch bezel.
7. Release the J channel retainers securing the seat cushion cover to the seat cushion frame in order to gain access to the power seat switch.
8. Remove the push-in fastener securing the power seat switch (2) to the seat cushion frame (3).
9. Slide the power seat switch (2) from the seat cushion frame (3).
10. Disconnect the electrical connector (1) from the power seat switch.

1. Install the wiring harness in the position in which it was removed.
2. Connect the electrical connector to the power seat switch.
3. Slide the power seat switch upward into the seat cushion frame.
4. Install the push-in fastener in order to secure the power seat switch to the seat cushion frame.
5. Install the seat cushion cover over the switch.
6. Position the power seat switch bezel over the switches.
7. Engage the power seat switch bezel fasteners in order to secure the bezel to the seat cushion frame.
8. Install the power seat switch knobs.
9. Install the seat cushion. Refer to «Seat Cushion Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
10. Enable the SIR system. Refer to «SIR Disabling and Enabling Zone 7»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) driver's seat and «SIR Disabling and Enabling Zone 9»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) and passenger seat.

1. Disable the SIR system. Refer to «SIR Disabling and Enabling Zone 7»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) or to «SIR Disabling and Enabling Zone 9»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) in SIR.
2. Remove the seat cushion to gain access to the horizontal seat adjuster motor. Refer to «Seat Cushion Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
3. Disconnect the electrical connectors from the motor.
4. Remove the screws from the top of the adjuster motor.
5. Remove the seat adjuster drive cable (1) by pulling the cable out of the motor.
6. Remove the seat adjuster motor.
7. Remove the short drive cable from the seat adjuster.

1. Position the short drive cable into the seat adjuster.
2. Line up the square end of the cable with the motor.
3. Slide the motor on to the cable.
4. Install the long drive cable (1) into the motor.
5. Install the long cable into the seat adjuster.
6. Ensure that both cables are fully seated.
7. Install the motor retaining screws. Tighten: Tighten the screws to 5 N.m (44 lb in).
8. Connect the electrical connectors.
9. Install the seat cushion. Refer to «Seat Cushion Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
10. Enable the SIR system. Refer to «SIR Disabling and Enabling Zone 7»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) or to «SIR Disabling and Enabling Zone 9»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) in SIR.
11. If the vehicle is equipped with memory seats, calibrate the seat. Refer to «Memory Seat Calibration Procedure»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system__memory-seat-calibration-procedure) .

1. Disable the SIR system. Refer to «SIR Disabling and Enabling Zone 7»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) or to «SIR Disabling and Enabling Zone 9»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) in SIR.
2. Remove the seat. Refer to «Seat Replacement - Bucket»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
3. Disconnect the electrical connectors from the motor.
4. Remove the retaining bolt (2) from the vertical seat adjuster motor.
5. Lift the motor up and release it from slot (1) in the adjuster.
6. Remove the motor.

1. Install the vertical seat adjuster motor into the slot (1) on the adjuster.
2. Rotate the motor down and position the motor into the seat adjuster.
3. Install the retaining bolt (2). Tighten: Tighten the bolt to 10 N.m (88 lb in).
4. Connect the electrical connectors.
5. Install the seat. Refer to «Seat Replacement - Bucket»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
6. Enable the SIR system. Refer to «SIR Disabling and Enabling Zone 7»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) or to «SIR Disabling and Enabling Zone 9»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) in SIR.
7. If the vehicle is equipped with memory seats, calibrate the seat. Refer to «Memory Seat Calibration Procedure»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system__memory-seat-calibration-procedure) .

1. Disable the SIR system. Refer to «SIR Disabling and Enabling Zone 7»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) or to «SIR Disabling and Enabling Zone 9»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) in SIR.
2. Remove the seat assembly. Refer to «Seat Replacement - Bucket»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
3. Remove the seat cushion to gain access to the horizontal seat adjuster motor. Refer to «Seat Cushion Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
4. Disconnect the electrical connectors from the motor.
5. Remove the screws from the top of the adjuster motor.
6. Remove the seat adjuster drive cable (1) by pulling the cable out of the motor.
7. Remove the seat adjuster motor.
8. Remove the short drive cable from the seat adjuster.

1. Position the short drive cable into the seat adjuster.
2. Line up the square end of the cable with the motor.
3. Slide the motor on to the cable.
4. Install the long drive cable (1) into the motor.
5. Install the long cable into the seat adjuster.
6. Ensure that both cables are fully seated.
7. Install the motor retaining screws. Tighten: Tighten the screws to 5 N.m (44 lb in).
8. Connect the electrical connectors.
9. Install the seat cushion. Refer to «Seat Cushion Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
10. Install the seat assembly. Refer to «Seat Replacement - Bucket»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
11. Enable the SIR system. Refer to «SIR Disabling and Enabling Zone 7»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) or to «SIR Disabling and Enabling Zone 9»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) in SIR.
12. If the vehicle is equipped with memory seats, calibrate the seat. Refer to «Memory Seat Calibration Procedure»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system__memory-seat-calibration-procedure) .

1. Disable the SIR system. Refer to «SIR Disabling and Enabling Zone 7»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) or to «SIR Disabling and Enabling Zone 9»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) in SIR.
2. Remove the seat. Refer to «Seat Replacement - Bucket»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
3. Disconnect the electrical connector from the seat adjuster motor sensor (3).
4. Release the tabs and remove the sensor.

1. Install the seat adjuster motor sensor to the motor.
2. Connect the electrical connector to the sensor (3).
3. Install the seat. Refer to «Seat Replacement - Bucket»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
4. Enable the SIR system. Refer to «SIR Disabling and Enabling Zone 7»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) for driver's seat or «SIR Disabling and Enabling Zone 9»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) in SIR.
5. Calibrate the seat. Refer to «Memory Seat Calibration Procedure»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system__memory-seat-calibration-procedure) .

1. Disable the SIR system. Refer to «SIR Disabling and Enabling Zone 7»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) or to «SIR Disabling and Enabling Zone 9»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) in SIR.
2. Remove the seat cushion to gain access to the horizontal seat adjuster motor. Refer to «Seat Cushion Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
3. Disconnect the electrical connectors from the motor.
4. Remove the seat adjuster drive cable (1) by pulling the cable out of the motor.
5. Remove the sensor from the motor.

1. Install the sensor to the motor.
2. Line up the square end of the cable with the motor.
3. Install the long drive cable (1) into the motor.
4. Install the long cable into the seat adjuster.
5. Ensure that the cable is fully seated.
6. Connect the electrical connectors.
7. Install the seat cushion. Refer to «Seat Cushion Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
8. Enable the SIR system. Refer to «SIR Disabling and Enabling Zone 7»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) or to «SIR Disabling and Enabling Zone 9»(/cadillac/cts/i-2002-2007/remont/airbag/#supplemental-inflatable-restraint-system) in SIR.
9. Calibrate the seat. Refer to «Memory Seat Calibration Procedure»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system__memory-seat-calibration-procedure) .

1. Insert a flat - bladed tool under the front edge of the switch to release the retainer from the door trim panel.
2. Disconnect the electrical connector from the lock switch.
3. Use a flat - bladed tool to disengage the locking tabs from both sides of the switch.
4. Remove the lock switch.

1. Snap the door lock switch into the door switch bezel.
2. Connect the electrical connector.
3. Insert the rear of the door lock switch into the door trim panel.
4. Press down on the front of the door lock switch to engage the switch to the door trim panel.

1. Remove the front seat cushion. Refer to «Seat Cushion Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
2. Disconnect the electrical connectors from the heated seat module.
3. Remove the screws (1) retaining the memory seat module to the seat frame.
4. Remove the memory seat module.

1. Install the memory seat module.
2. Iinstall the memory seat module screws (1). Tighten: Tighten the screws 2 N.m (18 lb in).
3. Connect the electrical connections to the module.
4. Install the front seat cushion. Refer to «Seat Cushion Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
5. Calibrate the seat. Refer to «Memory Seat Calibration Procedure»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system__memory-seat-calibration-procedure)

Memory Seat Calibration Procedure

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.

Heated Seat Switch Replacement - Front

The Heated Seat Switches are serviced with the HVAC Control Module. Refer to HVAC Control Module Replacement in HVAC Systems Automatic.

Seat Back Heater Element Replacement - Front

The heater element is not a serviceable unit. The heater element is part of the seat cover and the cover and heater element must be replaced together. Refer to Seat Back Cover and Pad Replacement - Front .

Seat Cushion Heater Element Replacement - Front

The heater element is not serviced separately. The heater element is part of the seat cover, the seat cover and heater element must be replaced as an assembly. Refer to Seat Cushion Replacement - Front .

1. Remove the front seat cushion. Refer to «Seat Cushion Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system)
2. Disconnect the electrical connector from the heated seat module.
3. Remove the heated seat module screws (2) and remove the module.

1. Install the heated seat control module and install the retaining screws (2). Tighten: Tighten the screws to 2 N.m (18 lb in).
2. Connect the electrical connector.
3. Install the seat cushion. Refer to «Seat Cushion Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .

1. Push in the release tab on the head restraint retainer to release.
2. Pull straight up on the head restraint to remove the restraint from the retainers.

1. Align the head restraint shafts to the retainers.
2. Slide the head restraint down until fully seated on the top of the seat back.

1. Remove the front seat head restraint. Refer to «Head Restraint Replacement - Front Seat»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
2. Turn the head restraint upside down on a clean protected surface.
3. Release the J-Channel retainer securing the cover to the head restraint.
4. Remove the cover from the head restraint.

1. Install the cover over the head restraint.
2. Close the J-channel retainer in order to secure the cover to the head restraint.
3. Ensure there are no lumps or wrinkles in the head restraint cover.
4. Install the head restraint to the seat assembly. Refer to «Head Restraint Replacement - Front Seat»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .

1. Remove the seat back trim. Refer to «Seat Back Trim Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
2. Remove the head restraint. Refer to «Head Restraint Replacement - Front Seat»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
3. Release the seat cover J channel (2) from the seat back frame.
4. Pinch the head restraint retainer (1) to release it from the seat frame.

1. Install the seat cover J channel (2) to the seat back frame.
2. Install the seat back trim. Refer to «Seat Back Trim Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
3. Insert the head restraint retainer through the seat cover and into the frame.
4. Install the head restraint. Refer to «Head Restraint Replacement - Front Seat»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .

1. Push in and pull up on the front of the rear seat cushion.
2. Lift up and out on the seat cushion.
3. Remove the rear seat cushion from the vehicle.

1. Install the rear seat cushion into the vehicle.
2. Engage the center wire hook, on the back of the seat cushion, under the seat back frame.
3. Position the rear seat buckles in the slots of the rear seat cushion.
4. Push down and rearward to seat the rear seat cushion into the latches in the number 4 bar. IMPORTANT: Pull up on the front of the rear seat cushion to ensure that the cushion is secure.

1. Remove the rear seat cushion. Refer to «Seat Cushion Replacement - Rear»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
2. Unhook the rear seat cover draw strings (1) from the seat bottom frame (2).
3. Remove the seat cushion cover (1) and the seat foam (2) from the rear seat bottom frame.
4. Cut the hog rings which retain the seat cover (1) to the foam pad ditches.

1. Position the seat cushion cover (1) over the seat cushion foam pad.
2. Install the hog rings in order to hold the rear seat cushion cover to the foam pad, in the ditches on the foam pad.
3. Install the seat cushion (2) to the seat cushion frame.
4. Work the seat cushion cover (1) over the cushion.
5. Tighten the drawstrings and secure the strings to the seat bottom frame.
6. Install the rear seat cushion. Refer to «Seat Cushion Replacement - Rear»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .

1. Remove the seat back. Refer to «Seat Back Replacement - Rear»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
2. Remove the head restraints. Refer to «Head Restraint Replacement - Rear Seat»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
3. Remove the armrest. Refer to «Armrest Replacement - Rear Seat»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
4. Remove the head restraint retainers. Refer to «Head Restraint Retainer Replacement - Rear Seat»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
5. Remove J channels retaining the seat back cover (1) to the seat frame.
6. Pull the seat back cover (1) and the cushion (2) from the frame.
7. Remove the seat cover from the seat foam pad.

1. Position the seat back cover to the foam pad.
2. Position the foam cushion (2) and pad to the seat back frame.
3. Work the cover edges over the foam cushion.
4. Install the J channels to retain the rear seat back cover and foam pad to the seat back frame.
5. Install the armrest. Refer to «Armrest Replacement - Rear Seat»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
6. Use the following procedures if the seat back is equipped with center head restraints: Align the head restraint mounting holes with the seat covers. Cut holes in the seat back cover in order to install the head restraint retainers
7. Install the head restraint retainers. Refer to «Head Restraint Retainer Replacement - Rear Seat»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
8. Install the seat back. Refer to «Seat Back Replacement - Rear»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system)
9. Install the head restraints. Refer to «Head Restraint Replacement - Rear Seat»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .

1. Remove the upper trunk trim. Refer to «Compartment Trim Panel Replacement - Rear»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-rear-end) in Body Rear End.
2. Remove the upper retaining nuts (1) from the rear seat back.
3. Remove the rear seat cushion. Refer to «Seat Cushion Replacement - Rear»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
4. Remove the center seat belt (2) and shoulder belt buckle nut (1), if equipped.
5. Place the center shoulder belt on the rear shelf panel.
6. Remove the lower seat back retaining nuts (1).
7. Pull out on the top of the rear seat back.
8. Position the rear shoulder belts to clear the rear seat back during removal.
9. Remove the rear seat back.

1. Install the rear seat back into the car.
2. Install the upper retaining nuts (1) to the seat back studs (2). Tighten: Tighten the nuts to 9 N.m (80 lb in).
3. Install the upper trunk trim. Refer to «Compartment Trim Panel Replacement - Rear»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-rear-end) in Body Rear End.
4. Install the rear seat back retaining nuts (1). Tighten: Tighten the nut to 9 N.m (80 lb in).
5. Install the center seat belt (2) and shoulder belt buckle anchor nut (1). Tighten: Tighten the bolts to 30 N.m (22 lb ft).
6. Install the rear seat cushion. Refer to «Seat Cushion Replacement - Rear»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .

1. Remove the rear seat back cover and pad. Refer to «Seat Back Cover and Pad - Rear Split Folding»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
2. Drill out the rivets (1) retaining the latch to the seat frame.
3. Push in on the release tab retaining the cable to the seat frame.
4. Remove the latch assembly from the seat frame.

1. Install the latch assembly into position. Rivet the latch into place.
2. Install the latch release cable into the retaining slot.
3. Install the rear seat cover and pad. «Seat Back Cover and Pad - Rear Split Folding»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .

1. Remove the seat back. Refer to «Seat Back Replacement - Rear»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
2. Remove the split fold seat pivot nut (1).
3. Remove the seat back from the seat frame.
4. Remove the head restraints. Refer to «Head Restraint Replacement - Rear Seat»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
5. Remove the head restraint retainers. Refer to «Head Restraint Retainer Replacement - Rear Seat»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
6. Remove the push in retainers (1) retaining the seat back cover to the seat frame.
7. Remove the armrest. Refer to «Armrest Replacement - Rear Seat»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
8. Remove the push in retainers (1) from the front of the seat back frame retaining the seat back cover to the seat frame.
9. Unhook all J channels from the seat frame.
10. Remove the seat back trim cover from the frame.

1. Position the seat back cover to the foam pad.
2. Position the foam cushion and pad to the seat back frame.
3. Work the cover edges over the foam cushion.
4. Install the push in retainers (1) to the front of the seat cover.
5. Install the armrest. Refer to «Armrest Replacement - Rear Seat»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
6. Install the push in retainers (1) to the back of the seat back cover.
7. Install the J channels to retain the rear seat back cover and foam pad to the seat back frame.
8. Install the seat back to the seat frame.
9. Install the split fold seat pivot nut (1). Tighten: Tighten the nut to 42 N.m (31 lb ft).
10. Use the following procedures if the seat back is equipped with center head restraints: Align the head restraint mounting holes with the seat covers. Cut holes in the seat back cover in order to install the head restraint retainers
11. Install the head restraint retainers. Refer to «Head Restraint Retainer Replacement - Rear Seat»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
12. Install the seat back. Refer to «Seat Back Replacement - Rear»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
13. Install the head restraints. Refer to «Head Restraint Replacement - Rear Seat»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .

1. Remove the seat back from the vehicle. Refer to «Seat Back Replacement - Rear»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
2. Release the seat back lower J channel (1) to gain access to the armrest retainers.
3. Remove the armrest retaining nuts (1).
4. Remove the armrest from the seat back.

1. Install the armrest to the seat back.
2. Install the armrest retaining nuts (1) and tighten to: Tighten: Tighten the retaining nuts to 10 N.m (88 lb in).
3. Fasten the seat back cover J channel (1).
4. Install the seat back into the vehicle. Refer to «Seat Back Replacement - Rear»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .

1. Push in on the release tab located on the head restraint retainer (1) to remove the rear head restraint from the retainer.
2. Remove the head restraint.

1. Align the rear seat head restraint to the head restraint retainers.
2. Push the head restraint down until the head restraint is fully seated against the rear seat back.

1. Remove the rear seat back. Refer to «Seat Back Replacement - Rear»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
2. Remove the head restraint. Refer to «Head Restraint Replacement - Rear Seat»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
3. Release the J channel (1) at the base of the seat back.
4. Reach up under the seat back and pinch the base of the head restraint retainer (1) to release it.
5. Remove the retainers.

1. Fasten the J channel (1) on the seat back.
2. Push the head rest retainers into the seat back until they lock into place.
3. Install the rear seat back. Refer to «Seat Back Replacement - Rear»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .
4. Install the head restraint. Refer to «Head Restraint Replacement - Rear Seat»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) .

Power Seats System Description and Operation

The driver and passenger power seat systems each consist 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 switches provide both power and ground to the selected seat motors. Battery positive voltage is supplied at all times to the driver and passenger seat adjuster switches from the SEATS Circuit Breaker located in the left rear fuse block. Both seat adjuster switches are 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 Components

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

1. Lumbar Switch
2. Lumbar Horizontal Motor
3. SEATS Circuit Breaker 30 A

Power Lumbar Switch

The power lumbar switches provide both power and ground to the lumbar motor. Battery positive voltage is supplied at all times to the driver and passenger seat lumbar switch from the SEATS Circuit Breaker located in the left rear fuse block. Both lumbar switches are grounded through the switch ground circuit and G 307.

Lumbar Motor

The lumbar support system consists of one motor that moves the lumbar support horizontally forward or rearward. The 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.

Lumbar Operation

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

The driver seat lumbar support system with memory (A45) consists of the following components

1. Lumbar Switch
2. Memory Seat Module (MSM)
3. Lumbar Horizontal Motor
4. Lumbar Horizontal Position Sensor
5. SEATS Fuse 10 A

Lumbar Switch

Battery positive voltage is supplied at all times to the driver seat lumbar switch from the SEATS Fuse located in the left rear fuse block. When the lumbar switches are pressed they send a 12 volt signal to the MSM. The MSM then commands the lumbar motor to move in response to the switch signals.

The lumbar support system consists of one motor that moves the lumbar support horizontally forward or rearward. The 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. The memory seat module provides the motor with a soft stop that will actually stop the motor just before its physical end-of-travel. This decreases the stress on the motor. If the motor reaches it's end-of-travel due a soft stop and the switch is released and pressed again, the lumbar support will move short distance farther to it's physical travel limit.

When the lumbar switch is operated to move the lumbar support forward, battery positive voltage is applied through the switch contacts and the driver seat lumbar forward switch signal circuit to the MSM. In response to this signal, the MSM applies battery positive voltage through the lumbar motor forward control circuit and ground through the lumbar motor rearward control circuit to the motor. The motor runs to drive the lumbar support forward toward the occupant's back until the switch is released. Moving the lumbar support rearward works similarly to moving the lumbar support forward, except that battery positive voltage and ground are applied on the opposite circuits causing the motor to run in the opposite direction. The MSM also controls the lumbar horizontal motor during memory recall functions.

Position Sensors

The lumbar position sensor is a potentiometer which is attached directly to the lumbar motor. The MSM supplies a 5 volt reference voltage through the 5 volt reference circuit and ground through the low reference circuit to the lumbar position sensor. When the lumbar motor rotates, the resistance of the potentiometer varies changing the feedback voltage of the position sensor signal circuit. This voltage varies from 0.25-4.75 volts. The MSM monitors this voltage signal to determine the lumbar position.

When a memory set command is received, the MSM records the lumbar position by storing the feedback voltage from the position sensor. Then, when a memory recall command is received, the MSM moves the motor until the position sensor feedback voltage equals the feedback voltage stored in memory. The lumbar support is not involved in the easy exit function.

Memory Functions

Refer to Memory Seats Description and Operation .

Heated Seats Description and Operation

The driver and front passenger heated seats each consist of the following components.

1. Heated Seat Switch
2. Heated Seat Module
3. Seat Cushion Heater Element
4. Seat Back Heater Element
5. Temperature Sensor
6. Climate Control Panel (CCP)
7. Rear Integration Module (RIM)
8. LF FRT HTD SEAT MOD 10 A
9. RF FRT HTD SEAT MOD 10 A

Power and Ground

Battery positive voltage is supplied to both front heated seat modules from the rear fuse block IGN 3 Fuse. This voltage is used to power up the heated seat modules allowing the heated seats to operate only when the ignition switch is in the ON position. Battery positive voltage is also supplied at all times to the left front heated seat module from the LF FRT HTD SEAT MOD fuse located in the left rear fuse block and to the right front heated seat module from the RF FRT HTD SEAT MOD fuse located in the right rear fuse block. This voltage is used by the modules to supply power to the seat heating elements. Both modules are grounded through the module ground circuits and G307.

Heated Seat Operation

The driver and passenger heated seats are controlled by separate heated seat switches. Both switches are located in the CCP. When a heated seat switch is pressed, the CCP sends a class 2 message via the serial data line to the rear RIM indicating the heated seat command. In response to this signal, the RIM momentarily sends a 35 millisecond one shot pulse signal that is pulled low through the heated seat high/low signal circuit to the heated seat module. The heated seat module then applies or removes battery positive voltage through the element supply voltage circuit of the seat heating elements. The RIM then sends a class 2 message back to the CCP to either illuminate or turn off the appropriate temperature indicator.

Temperature Regulation

When the ignition is turned to the ON position, the heated seats will initialize in the OFF state. With each activation of the heated seat switch, the heated seat module will cycle the temperature setting in the following manner: HIGH, LOW, and OFF.

The heated seat system is designed in order to warm the seat cushion and seat back to approximately 42°C (107.6°F) when in the high heat position, and 37°C (98.6°F) when in the low heat position. The heated seat module monitors the seat temperature through the temperature sensor signal circuit and the temperature sensor (thermistor) that is located in the seat cushion. The temperature sensor is a variable resistor, it's resistance changes as the temperature of the seat changes. When the temperature sensor resistance indicates to the heated seat module that the seat has reached the desired temperature, the module opens the ground path of the seat heating elements through the heated seat element control circuit. The module will then cycle the element control circuit open and closed in order to maintain the desired temperature.

Load Management

The ON/OFF status of the heated seats is reported to the RIM through the status output signal circuit of each heated seat module. During Heated Seats Load Shed Level 1, and the RIM recognizes that the heated seat status signal is active, it will cycle the heated seat operation 16.0 seconds ON and 4.0 seconds OFF. During Heated Seats Load Shed Level 2, the RIM will signal the heated seat module to cancel the heated seat operation and send a class 2 message to the CCP to turn off the appropriate heated seat temperature indicators.

Memory Seats Description and Operation

The memory seat system consists of the following components

1. Seat Adjuster Switch
2. Memory Seat Module (MSM)
3. Seat Horizontal Motor
4. Seat Front Vertical Motor
5. Seat Rear Vertical Motor
6. Seat Recline Motor
7. Seat Horizontal Position Sensor
8. Seat Front Vertical Position Sensor
9. Seat Rear Vertical Position Sensor
10. Seat Recline Position Sensor
11. Memory Function Switch
12. Driver Door Switch Assembly (DDSA)
13. Driver Door Module (DDM)
14. SEATS Circuit Breaker 30 A
15. SEATS Fuse 10 A

Personalization - Driver Information Center (DIC)

Personalization in the Setup menu of the driver information center (DIC) must be in the active state for memory seats to operate. A check mark appearing after the word Personalization on the display screen indicates that the feature is active. For more detailed information concerning programming of Personalization and other memory recall features controlled through the DIC, refer to Driver Personalization in Personalization

Personalization Option - Dash Integration Module (DIM)

The memory seat module cannot perform memory recall functions unless the Personalization Option is activated. The personalization option is located in the DIM. The DIM reports the personalization option setting to the MSM, as well as other receiving modules via a class 2 message each time the ignition switch is cycled to the ON position. The MSM will then store the personalization option setting and examine it before making a memory seat adjustment. The personalization option setting stored within the MSM will not change until the personalization option setting in the DIM is changed and the ignition switch is cycled to the ON position.

Battery positive voltage is supplied at all times to the seat adjuster switch from the SEATS Fuse located in the left rear fuse block. When the seat switches are pressed they send a 12 volt signal to the MSM. The MSM commands the selected seat motors to move in response to the switch signal.

MSM Power and Ground

Battery positive voltage is supplied at all times to the memory seat module through the battery positive voltage circuit from the SEATS Circuit Breaker located in the left rear fuse block. This voltage is used to power up MSM and also to apply power to the seat motors when commanded. Battery positive voltage is also supplied to the MSM from the SEATS Fuse that also supplies voltage to the seat adjuster switch. 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 G307.

Seat Motors

The 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.

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 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.

When a memory function switch is pressed, the associated signal circuit of the DDSA is momentarily grounded. In response to this signal, the DDSA then sends a message via the simple bus interface to the DDM indicating that a memory function signal has been received. The DDM then sends the message to the MSM via class 2 serial data line.

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 for 5 seconds, a double beep will sound each time a memory position is set. A second seat position may be programmed by repeating the above steps and pressing button 2. When the MSM receives a memory set message, the MSM records the feedback voltages from all four seat position sensors for the appropriate driver. The easy exit position is programmed by moving the seat to the desired exit position and then holding the exit button for 5 seconds. Two easy exit positions can be programmed, one for each driver. When the MSM receives a set exit message, the MSM records the feedback voltages from all four seat position sensors for the appropriate driver.

When the memory recall 1 or 2 button is pressed, a single chime is sounded through the radio in order to acknowledge the signal and the MSM receives the memory recall message. In response to this message, 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, a single chime is sounded in order to acknowledge the signal and the MSM receives the easy exit message. In response to this message, 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.

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

Recall Personalization

When a keyless entry transmitter is used in order to unlock the vehicle doors, the transmitter sends a signal to the diversity antenna module. The module 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 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 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 the PARK position, only the recall personalization function is deactivated and 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, only memory record is allowed, all other memory seat functions are not allowed.

See also:
• Scan Tool Does Not Power Up
• Power Mode Mismatch
• Diagnostic Trouble Code (DTC) List
• Diagnostic Trouble Code (DTC) List
• Testing for Intermittent Conditions and Poor Connections
• Circuit Testing
• Wiring Repairs
• Connector Repairs
• Power Door Systems Connector End Views
• Front Door Switch Replacement
• Checking Aftermarket Accessories
• Driver Personalization
• HVAC Control Module Replacement
• SIR Caution
• SIR Disabling and Enabling Zone 7
• Fastener Notice
• Seat Belt Replacement - Front
• Compartment Trim Panel Replacement - Rear
• Symptoms - Seats
• Diagnostic System Check - Power Seat Systems
• Diagnostic Trouble Code (DTC) List
• Power Seats System Description and Operation
• Heated Seats Description and Operation
• Memory Seats Description and Operation
• Power Seat Inoperative (w/o A45)
• Lumbar Support Inoperative (w/o A45)
• Heated Seat Always On
• Heated Seat Temperature Adjustment Inoperative
• Seat Back Heater Element Replacement - Front
• Seat Cushion Heater Element Replacement - Front
• Seat Back Frame Replacement - Front
• Memory Seat Calibration Procedure