GM Service Manual Online
For 1990-2009 cars only
Base Model Part Number: The scan tool displays the 8 digit hardware part number of the module.

Back Panel Position Switch: The scan tool displays Active/Inactive. When the folding seat is in the stowed or seated positions, the switch contacts are closed to voltage and the scan tool will display Active. When the folding seat is in a position other than the seated or stowed positions, the switch is open and the scan tool will display Inactive.

Calibrated (RSM): The scan tool displays Yes/No. When the rear seat module is calibrated the scan tool will display Yes.

Calibration Part Number: The scan tool displays the 8 digit part number of the calibration incorporated into the module

Driver Seat Front Vertical Sensor: The scan tool displays 0-5.0 volts or 0-255 counts. The sensor potentiometer provides an analog voltage which varies directly with the seat front vertical position. High scan tool values (volts or counts) indicate that the seat front is in the up position and low values indicate that the seat front is in the down position.

Driver Seat Horizontal Sensor: The scan tool displays 0-5.0 volts or 0-255 counts. The sensor potentiometer provides an analog voltage which varies directly with the seat horizontal position. High scan tool values (volts or counts) indicate that the seat is in the forward position and low values indicate that the seat is in the rearward position.

Driver Seat Rear Vertical Sensor: The scan tool displays 0-5.0 volts or 0-255 counts. The sensor potentiometer provides an analog voltage which varies directly with the seat rear vertical position. High scan tool values (volts or counts) indicate that the seat rear vertical is in the up position and low values indicate that the seat rear vertical is in the down position.

Driver Seat Recline Sensor: The scan tool displays 0-5.0 volts or 0-255 counts. The sensor potentiometer provides an analog voltage which varies directly with the seat recline position. High scan tool values (volts or counts) indicate that the seat recline is in the froward position and low values indicate that the seat recline is in the rearward position.

End Model Part Number: Before the module has been serviced or replaced, the scan tool displays the module production part number. Then, once the module has been replaced, the scan tool will display the new serviced part number.

Front Stow Switch: The scan tool displays Inactive/Active. When the folding seat front stow switch is pressed, the scan tool will display the switch input to the rear seat module as Active.

Front Vertical Downward Switch: The scan tool displays Inactive/Active. When the seat front down switch is activated, the scan tool will momentarily display the switch input to the memory seat module as Active.

Front Vertical Motor Downward: The scan tool displays Inactive/Active. When the seat front down switch is activated or when a memory recall occurs, the scan tool will momentarily display Active while the output from the memory seat module is commanding the seat front vertical motor in the down direction.

Front Vertical Motor Upward: The scan tool displays Inactive/Active. When the seat front up switch is activated or when a memory recall occurs, the scan tool will momentarily display Active while the output from the memory seat module is commanding the seat front vertical motor in the up direction.

Front Vertical Upward Switch: The scan tool displays Inactive/Active. When the seat front up switch is activated, the scan tool will momentarily display the switch input to the memory seat module as Active.

Horizontal Forward Switch (MSM): The scan tool displays Inactive/Active. When the seat forward switch is activated, the scan tool will momentarily display the switch input to the memory seat module as Active.

Horizontal Motor (RSM): The scan tool displays Idle/Forward/Rearward. During folding seat operation the scan tool will display Forward or Rearward, this is the direction the rear seat module is commanding the horizontal motor to move the seat.

Horizontal Motor Forward (MSM): The scan tool displays Inactive/Active. When the seat forward switch is activated or when a memory recall occurs, the scan tool will momentarily display Active while the output from the memory seat module is commanding the seat horizontal motor in the forward direction.

Horizontal Motor Rearward (MSM): The scan tool displays Inactive/Active. When the seat rearward switch is activated or when a memory recall occurs, the scan tool will momentarily display Active while the output from the memory seat module is commanding the seat horizontal motor in the rearward direction.

Horizontal Rearward Switch (MSM): The scan tool displays Inactive/Active. When the seat rearward switch is activated, the scan tool will momentarily display the switch input to the memory seat module as Active.

Horizontal Sensor (MSM): The scan tool displays 0-5.0 Volts or 0-255 A/D. The sensor potentiometer provides an analog voltage which varies directly with the seat horizontal position. High scan tool values (Volts or A/D) indicate that the seat is in the forward position and low values indicate that the seat is in the rearward position.

Horizontal Sensor (RSM): The scan tool displays 0-3,000 Counts. The hall effect sensor provides a pulse signal with each rotation of the motor that the scan tool displays as counts. High scan tool count values indicate that the folding seat is forward for the stowed position, while low count values indicate that the folding seat is rearward for the seated position.

Julian Date of Build: The scan tool displays a 3-digit number. This number is the day of the year that the module was built.

Liftgate Ajar Switch: The scan tool displays Inactive/Active. When the liftgate is in the open position, the scan tool will display the liftgate ajar switch signal input to the liftgate module as Active.

Load Floor Switch: The scan tool displays Inactive/Active. When the folding seat back panel is in the folded position, the load floor switch contacts are closed to voltage and the scan tool will display Inactive. When the folding seat back panel is unfolded to the deployed position, the load floor switch is open and the scan tool will display Active.

Lumbar Forward Switch: The scan tool displays Inactive/Active. When the seat lumbar forward switch is activated, the scan tool will momentarily display switch input to the memory seat module as Active.

Lumbar Horizontal Position -- Memory Data 1: The scan tool displays the volts or count values of the lumbar horizontal position stored in memory for driver 1.

Lumbar Horizontal Position -- Memory Data 2: The scan tool displays the volts or count values of the lumbar horizontal position stored in memory for driver 2.

Lumbar Horizontal Sensor: The scan tool displays 0-5.0 volts or 0-255 counts. The sensor potentiometer provides an analog voltage which varies directly with the lumbar horizontal position. High scan tool values (volts or counts) indicate that the Lumbar is in the forward position and low values indicate that the lumbar is in the rearward position.

Lumbar Motor Forward: The scan tool displays Inactive/Active. When the driver seat lumbar forward switch is activated or when a memory recall occurs, the scan tool will momentarily display Active while the output from the memory seat module is commanding the lumbar horizontal motor in the forward direction.

Lumbar Motor Rearward: The scan tool displays Inactive/Active. When the driver seat lumbar rearward switch is activated or when a memory recall occurs, the scan tool will momentarily display Active while the output from the memory seat module is commanding the lumbar horizontal motor in the rearward direction.

Lumbar Rearward Switch: The scan tool displays Inactive/Active. When the driver seat lumbar rearward switch is activated, the scan tool will momentarily display the switch input to the memory seat module as Active.

Memory Recall Switches: The scan tool displays 0.43-2.74 volts. When the memory 1 switch is pressed, the scan tool will momentarily display 2.74  volts, when the memory 2 switch is pressed, 1.78 volts is displayed, and when the EXIT switch is pressed, 0.96 volts is displayed.

Memory Switch 12 V Ref.: The scan tool displays the voltage supplied to the memory recall switch.

Rear Stow Switch: The scan tool displays Inactive/Active. When the folding seat rear stow switch is pressed, the scan tool will display the switch input to the rear seat module as Active.

Rear Vertical Downward Switch: The scan tool displays Inactive/Active. When the seat rear down switch is activated, the scan tool will momentarily display the switch input to the memory seat module as Active.

Rear Vertical Motor Downward: The scan tool displays Inactive/Active. When the seat rear down switch is activated or when a memory recall occurs, the scan tool will momentarily display Active while the output from the memory seat module is commanding the seat rear vertical motor in the down direction.

Rear Vertical Motor Upward: The scan tool displays Inactive/Active. When the seat rear up switch is activated or when a memory recall occurs, the scan tool will momentarily display Active while the output from the memory seat module is commanding the seat rear vertical motor in the up direction.

Rear Vertical Upward Switch: The scan tool displays Inactive/Active. When the seat rear up switch is activated, the scan tool will momentarily display the switch input to the memory seat module as Active.

Recline Forward Switch (MSM): The scan tool displays Inactive/Active. When the seat recline forward switch is activated, the scan tool will momentarily display the switch input to the memory seat module as Active.

Recline Motor (RSM): The scan tool displays Idle/Forward/Rearward. During folding seat operation the scan tool will display Forward or Rearward, this is the direction the rear seat module is commanding the recline motor to move the seat back.

Recline Motor Forward (MSM): The scan tool displays Inactive/Active. When the seat recline forward switch is activated or a memory recall occurs, the scan tool will momentarily display Active while the output from the memory seat module is commanding the seat recline motor in the forward direction.

Recline Motor Rearward (MSM): The scan tool displays Inactive/Active. When the seat recline rearward switch is activated or when a memory recall occurs, the scan tool will momentarily display Active while the output from the memory seat module is commanding the seat recline motor in the rearward direction.

Recline Rearward Switch (MSM): The scan tool displays Inactive/Active. When the seat recline rearward switch is activated, the scan tool will momentarily display the switch input to the memory seat module as Active.

Recline Sensor (RSM): The scan tool displays 0-3,000 Counts. The hall effect sensor provides a pulse signal with each rotation of the motor that the scan tool displays as counts. High scan tool count values indicate that the seat recline is in the forward position, while low count values indicate that the seat recline is in the rearward or stowed position.

Recline Switch (RSM): The scan tool displays Inactive/Active. When the folding seat recline switch is pressed, the scan tool will display the switch input to the rear seat module as Active.

Right Rear Door Ajar Sw.: The scan tool displays Door Closed/Door Ajar. When the right rear door is in the open position, the scan tool will display the right rear door ajar switch signal input to the body control module as Active.

Rotation Motor: The scan tool displays Idle/Forward/Rearward. During folding seat operation the scan tool will display Forward or Rearward, this is the direction the rear seat module is commanding the rotation motor to rotate the seat back.

Rotation Sensor: The scan tool displays 0-3,000 Counts. The hall effect sensor provides a pulse signal with each rotation of the motor that the scan tool displays as counts. High scan tool count values indicate that the rotation of the seat back is forward for the stowed position, while low count values indicate that the seat back rotation is rearward for the seated position.

Seat Front Vertical Position -- Memory Data 1: The scan tool displays the volts or count values of the seat front vertical position stored in memory for driver 1.

Seat Front Vertical Position -- Memory Data 2: The scan tool displays the volts or count values of the seat front vertical position stored in memory for driver 2.

Seat Horizontal Position -- Memory Data 1: The scan tool displays the volts or count values of the seat horizontal position stored in memory for driver 1.

Seat Horizontal Position -- Memory Data 2: The scan tool displays the volts or count values of the seat horizontal position stored in memory for driver 2.

Seat Rear Vertical Position -- Memory Data 1: The scan tool displays the volts or count values of the seat rear vertical position stored in memory for driver 1.

Seat Rear Vertical Position -- Memory Data 2: The scan tool displays the volts or count values of the seat rear vertical position stored in memory for driver 2.

Seat Recline Position -- Memory Data 1: The scan tool displays the volts or count values of the seat back recline position stored in memory for driver 1.

Seat Recline Position -- Memory Data 2: The scan tool displays the volts or count values of the seat back recline position stored in memory for driver 2.

Software Part Number: The scan tool displays the 8 digit part number of the software incorporated into the module.

Year Module Built: The scan tool displays a 4-digit number. This number represents the year the module was built.