GM Service Manual Online
For 1990-2009 cars only
Table 1: Driver Position Module
Table 2: Door Module(s)
Table 3: Rear Heated Seat Module
Table 4: Climate Control Seat Module (CCSM)

The scan tool data list contains all the seat system related parameters that are available on the scan tool. The parameters in the list are arranged in alphabetical order. The column, Data List, indicates the location of the parameter within the scan tool menu selections.

The typical data values are obtained from a properly operating vehicle under the conditions specified in the second row of the scan tool data list table. Comparison of the parameter values from the suspect vehicle with the typical data values may reveal the source of the customer concern.

Driver Position Module

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON/Engine OFF

Base Model Part Number

Module ID Information

Numeric

Varies

Calibration Part Number

Module ID Information

Numeric

Varies

Driver Seat Front Vertical Sensor

Seat 1 Info

Volts

0.0-5.0 Volts

Driver Seat Horizontal Sensor

Seat 1 Info

Volts

0.0-5.0 Volts

Driver Seat HVC Level

Seat 1 HVC Data

High/Medium/Low

High

Driver Seat HVC Mode

Seat 1 HVC Data

Off/Back & Cushion/Back Only/Cool

Off

Driver Seat Rear Vertical Sensor

Seat 1 Info

Volts

0.0-5.0 Volts

Driver Seat Recline Sensor

Seat 1 Info

Volts

0.0-5.0 Volts

End Model Part Number

Module ID Information

Numeric

Varies

Front Vertical Downward Switch

Seat 1 Inputs

Active/Inactive

Inactive

Front Vertical Upward Switch

Seat 1 Inputs

Active/Inactive

Inactive

Front Vertical Motor Downward

Seat 1 Outputs

Active/Inactive

Inactive

Front Vertical Motor Upward

Seat 1 Outputs

Active/Inactive

Inactive

Lumbar Forward Switch

Seat 1 Inputs

Active/Inactive

Inactive

Horizontal Motor Forward

Seat 1 Outputs

Active/Inactive

Inactive

Horizontal Motor Rearward

Seat 1 Outputs

Active/Inactive

Inactive

Horizontal Forward Switch

Seat 1 Inputs

Active/Inactive

Inactive

Horizontal Rearward Switch

Seat 1 Inputs

Active/Inactive

Inactive

Lumbar Downward Switch

Seat 1 Inputs

Active/Inactive

Inactive

Lumbar Downward Switch

Seat 2 Inputs

Active/Inactive

Inactive

Lumbar Horizontal Position

Memory Data 1

Volts

0.0-5.0 Volts

Lumbar Horizontal Position

Memory Data 2

Volts

0.0-5.0 Volts

Lumbar Horizontal Sensor

Seat 1 Info

Volts

0.0-5.0 Volts

Lumbar Motor Downward

Seat 1 Outputs

Active/Inactive

Inactive

Lumbar Motor Downward

Seat 2 Outputs

Active/Inactive

Inactive

Lumbar Motor Forward

Seat 1 Outputs

Active/Inactive

Inactive

Lumbar Motor Rearward

Seat 1 Outputs

Active/Inactive

Inactive

Lumbar Motor Upward

Seat 1 Outputs

Active/Inactive

Inactive

Lumbar Motor Upward

Seat 2 Outputs

Active/Inactive

Inactive

Lumbar Rearward Switch

Seat 1 Inputs

Active/Inactive

Inactive

Lumbar Upward Switch

Seat 1 Inputs

Active/Inactive

Inactive

Lumbar Upward Switch

Seat 2 Inputs

Active/Inactive

Inactive

Lumbar Vertical Position

Memory Data 1

Volts

0.0-5.0 Volts

Lumbar Vertical Position

Memory Data 2

Volts

0.0-5.0 Volts

Lumbar Vertical Sensor

Seat 1 Info

Volts

0.0-5.0 Volts

Lumbar Vertical Sensor

Seat 2 Info

Volts

0.0-5.0 Volts

Massage Switch

Seat 1 Inputs

Active/Inactive

Inactive

Massage Switch

Seat 2 Inputs

Active/Inactive

Inactive

Passenger Seat HVC Level

Seat 2 HVC Data

High/Medium/Low

High

Passenger Seat HVC Mode

Seat 2 HVC Data

Off/Back & Cushion/Back Only/Cool

Off

Recline Forward Switch

Seat 1 Inputs

Active/Inactive

Inactive

Recline Motor Forward

Seat 1 Outputs

Active/Inactive

Inactive

Recline Motor Rearward

Seat 1 Outputs

Active/Inactive

Inactive

Recline Rearward Switch

Seat 1 Inputs

Active/Inactive

Inactive

Rear Vertical Downward Switch

Seat 1 Inputs

Active/Inactive

Inactive

Rear Vertical Motor Downward

Seat 1 Outputs

Active/Inactive

Inactive

Rear Vertical Motor Upward

Seat 1 Outputs

Active/Inactive

Inactive

Rear Vertical Upward Switch

Seat 1 Inputs

Active/Inactive

Inactive

Seat Front Vertical Position

Memory Data 1

Volts

0.0-5.0 Volts

Seat Front Vertical Position

Memory Data 2

Volts

0.0-5.0 Volts

Seat Horizontal Position

Memory Data 1

Volts

0.0-5.0 Volts

Seat Horizontal Position

Memory Data 2

Volts

0.0-5.0 Volts

Seat Rear Vertical Position

Memory Data 1

Volts

0.0-5.0 Volts

Seat Rear Vertical Position

Memory Data 2

Volts

0.0-5.0 Volts

Seat Recline Position

Memory Data 1

Volts

0.0-5.0 Volts

Seat Recline Position

Memory Data 2

Volts

0.0-5.0 Volts

Software Part Number

Module ID Information

Numeric

Varies

Door Module(s)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON/Engine OFF

Memory Recall Switches

Inputs

0.43 volts/2.74 volts/1.78 volts0.96 volts

Volts

Memory Switch 12 V Ref.

Data

Volts

B+

Seat Back Heat Mode Ind. Cmd.

Outputs

Off/On

Off

Seat Back Heat Mode Sw.

Inputs

Inactive/Active

Inactive

Seat Cool Mode Ind. Cmd

Outputs

Off/On

Off

Seat Cool Mode Switch

Inputs

Inactive/Active

Inactive

Seat Heat High Ind. Cmd.

Outputs

Off/On

Off

Seat Heat Low Ind. Cmd.

Outputs

Off/On

Off

Seat Heat Medium Ind. Cmd.

Outputs

Off/On

OFF

Seat Heat Mode Cmd.

Outputs

Off/On

Off

Seat Heat Mode Sw.

Inputs

Inactive/Active

Inactive

Rear Heated Seat Module

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON/Engine OFF

Base Model Part Number

Module ID Information

Numeric

Varies

Calibration Part Number

Module ID Information

Numeric

Varies

End Model Part Number

Module ID Information

Numeric

Varies

Seat Back Heat Control

Seat 1 Outputs

High/Medium/Low

Off

Seat Back Heat Control

Seat 2 Outputs

High/Medium/Low

Off

Seat Back Heat Mode Ind. Cmd.

Seat 1 Outputs

Off/On

Off

Seat Back Heat Mode Ind. Cmd.

Seat 2 Outputs

Off/On

Off

Seat Back Heat Mode Sw.

Seat 1 Inputs

Inactive/Active

Inactive

Seat Back Heat Mode Sw.

Seat 2 Inputs

Inactive/Active

Inactive

Seat Cushion Heat Control

Seat 1 Outputs

High/Medium/Low

Off

Seat Cushion Heat Control

Seat 2 Outputs

High/Medium/Low

Off

Seat Heat High Ind. Cmd.

Seat 1 Outputs

Off/On

Off

Seat Heat High Ind. Cmd.

Seat 2 Outputs

Off/On

Off

Seat Heat Low Ind. Cmd.

Seat 1 Outputs

Off/On

Off

Seat Heat Low Ind. Cmd.

Seat 2 Outputs

Off/On

Off

Seat Heat Medium Ind. Cmd.

Seat 1 Outputs

Off/On

Off

Seat Heat Medium Ind. Cmd.

Seat 2 Outputs

Off/On

Off

Seat Heat Mode Cmd.

Seat 1 Outputs

Off/On

Off

Seat Heat Mode Cmd.

Seat 2 Outputs

Off/On

Off

Seat Heat Mode Sw.

Seat 1 Inputs

Inactive/Active

Inactive

Seat Heat Mode Sw.

Seat 2 Inputs

Inactive/Active

Inactive

Seat Heat Power

Seat 1 Outputs

Off/On

Off

Seat Heat Power

Seat 2 Outputs

Off/On

Off

Software Part Number

Module ID Information

Numeric

Varies


Climate Control Seat Module (CCSM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON/Engine OFF

Battery Voltage

Data Display

Volts

B+

Seat 1 Back Temp

Data Display

Counts/Volts

0-255 / 0.0-5.0

Seat 1 Cushion Temp

Data Display

Counts / Volts

0-255 / 0.0-5.0

Seat 2 Back Temp

Data Display

Counts / Volts

0-255 / 0.0-5.0

Seat 2 Cushion Temp

Data Display

Counts / Volts

0-255 / 0.0-5.0

Serial Number

Module ID Information

Numeric

Varies

Software Version

Module ID Information

Numeric

Varies