GM Service Manual Online
For 1990-2009 cars only
Table 1: Memory Seat Module Scan Tool Data Display
Table 2: Memory Seat Module Scan Tool Actuator Test

Memory Seat Module Scan Tool Data Display

Parameter

System State

Expected Value

Description

Operating Conditions: Ignition ON

Able to Move

--

Yes

The scan tool displays Yes or No. When the seat is requested to move, the seat memory module monitors the amount of Steps that a position sensor has taken during that movement. This inability to move at all or quickly enough may be due to a physical restriction in that movement, or the battery not having enough charge to power the particular motor adequately.

Able To Recall

--

Yes

The scan tool displays Yes or NO. This is if the seat assembly has the ability to recall a memory position.

Button 1 Input Status

--

Active

The scan tool displays Active or Inactive. This is the state of button 1 on the memory position switch.

Button 1 Output Status

--

Active

The scan tool displays Active or Inactive. This is the state of the button 1 signal from the SIM to the MSM indicating the memory request.

Button 2 Input Status

--

Active

The scan tool displays Active or Inactive. This is the state of button 2 on the memory position switch.

Button 2 Output Status

--

Active

The scan tool displays Active or Inactive. This is the state of button 2 on the memory position switch.

Button 3 Input Status

--

Active

The scan tool displays Active or Inactive. This is the state of button 3 on the memory position switch.

Button 3 Output Status

--

Active

The scan tool displays Active or Inactive. This is the state of button 3 on the memory position switch.

Button M Input Status

--

Active

The scan tool displays Active or Inactive. This is the state of button M on the memory position switch.

Button M Output Status

--

Active

The scan tool displays Active or Inactive. This is the state of button M on the memory position switch.

Button Pack Communication

--

Okay

The scan tool displays Okay or Not Okay. This is whether there is serial data communication with the mirror control switch, right hand or left hand rear-view mirrors. If there is communication with at least one of these components, the scan tool will display Okay. If there is no communications with all of the components, the scan tool will display Not Okay.

Current Priority

--

Priority 1

The scan tool displays Priority 1, Priority 2, No Memory, or Invalid. This is the current priority that is set when the vehicle is unlocked with either priority key 1 or 2.

Demist Request

--

Yes

The scan tool displays Yes or No. This is the status of the rear demist system.

Driver Identification

--

Driver 1

The scan tool displays Driver 1, Driver 2, or Driver 3. This is the current User selection based from the ignition key.

Front Vertical Position Maximum Limit

--

Steps

The scan tool displays 0 - 65635 Steps. This is the maximum limit of seat front vertical upward travel displayed in Steps. This value should be high but never reach 65535 Steps. If the value displayed is 65535, the seat has not been calibrated.

Front Vertical Position Minimum Limit

--

Steps

The scan tool displays 0 - 65635 Steps. This is the minimum limit of the seat front vertical downward travel displayed in Steps. This value should be low but never reach 0 Steps. If the value displayed is 0, the seat has not been calibrated.

Front Vertical Position Sensor

--

Connected

The scan tool displays Connected or Not Connected. This parameter confirms if the front vertical motor position sensor is connected.

Front Vertical Position Sensor

--

Steps

The scan tool displays 0 - 65635 Steps. This value represents the current position of the front vertical motor. High scan tool step values indicate an up position while low step values indicate a down position.

Front Vertical Switch

--

Inactive

The scan tool displays Inactive, Up, Down, or Invalid. This is the state of the front vertical switch.

Horizontal Position Maximum Limit

--

Steps

The scan tool displays 0 - 65635 Steps. This is the maximum limit of seat horizontal forward travel displayed in Steps. This value should be high but never reach 65535 Steps. If the value displayed is 65535, the seat has not been calibrated.

Horizontal Position Minimum Limit

--

0 Steps

The scan tool displays 0 - 65635 Steps. This is the minimum limit of seat horizontal rearward travel displayed in Steps. This value should be low but never reach 0 Steps. If the value displayed is 0, the seat has not been calibrated

Horizontal Position Sensor

--

Connected

The scan tool displays Connected or Not Connected. This parameter confirms if the seat horizontal motor position sensor is connected.

Horizontal Position Sensor

--

Steps

The scan tool displays 0 - 65635 Steps. This value represents the current position of the seat horizontal motor. High scan tool step values indicate a forward position while low step values indicate a rearward position.

Horizontal Switch

--

Inactive

The scan tool displays Inactive, Forward, Backward, or Invalid. This is the state of the horizontal switch.

Ignition Accessory Signal

--

On/Off

This parameter indicates the status of the ignition switch.

Ignition On Signal

--

On/Off

This parameter indicates the status of the ignition switch.

Ignition Switch

--

On/Off/Accessory

This parameter indicates the status of the ignition switch.

Left Exterior Mirror Communication

--

Okay

The scan tool display Okay or Not Okay. This parameter confirms if the scan tool can communicate with the left hand exterior rear-view mirror.

Left Exterior Mirror Switch

--

Inactive

The scan tool displays Up, Down, Left, Right, or Inactive. When the mirror switch is pressed, this parameter displays the selected mirror direction.

Lumbar Switch

--

Inactive

The scan tool displays Inactive, Forward, Backward, or Invalid. This is the state of the lumbar switch.

Memory 1 Button

--

Not Pressed

The scan tool displays Pressed or Not Pressed. This parameter displays the state of button 1 on the memory seat switch.

Memory 2 Button

--

Not Pressed

The scan tool displays Pressed or Not Pressed. This parameter displays the state of button 2 on the memory seat switch.

Memory 3 Button

--

Not Pressed

The scan tool displays Pressed or Not Pressed. This is the state of button 3 on the memory seat switch.

Memory Recall Position in Use

--

No Active Memory

The scan tool displays Memory 1, Memory 2, Memory 3. Priority 1, Priority 2 or No Active Memory. This parameter displays the status of the current memory recall of the seat assembly.

Mirror DIP Button

--

Not Pressed

The scan tool displays Pressed or Not Pressed. This is the state of the mirror dip / memory store (M) button on the memory position switch.

MSM Power Output

--

Active

The scan tool displays Active or Inactive. This is the Power Output state of the Memory Seat Module.

MSM UART Bus Status

--

On

The scan tool displays On or Off. This is the Status of the Memory Seat Module UART Bus.

MSM Wake-Up Output

--

Active

The scan tool displays Active or Inactive. This is the Wake-Up Output state of the Memory Seat Module.

Rear Vertical Position Maximum Limit

--

Steps

The scan tool displays 0 - 65635 Steps. This is the maximum limit of seat rear vertical upward travel displayed in Steps. This value should be high but never reach 65535 Steps. If the value displayed is 65535, the seat has not been calibrated.

Rear Vertical Position Minimum Limit

--

Steps

The scan tool displays 0 - 65635 Steps. This is the minimum limit of the seat rear vertical downward travel displayed in Steps. This value should be low but never reach 0 Steps. If the value displayed is 0, the seat has not been calibrated.

Rear Vertical Position Sensor

--

Connected

The scan tool displays Connected or Not Connected. This parameter confirms if the rear vertical motor position sensor is connected.

Rear Vertical Position Sensor

--

Steps

The scan tool displays 0 - 65635 Steps. This value represents the current position of the rear vertical motor. High scan tool step values indicate an up position while low step values indicate a down position.

Rear Vertical Switch

--

Inactive

The scan tool displays Inactive, Up, Down, or Invalid. This is the state of the rear vertical switch.

Recline Position Sensor

--

Connected

The scan tool displays Connected or Not Connected. This parameter confirms if the seat back recline motor position sensor is connected.

Recline Position Sensor

--

Steps

The scan tool displays 0 - 65635 Steps. This value represents the current position of the seat back recline motor. High scan tool step values indicate a forward position while low step values indicate a rearward position.

Recline Switch

--

Inactive

The scan tool displays Inactive, Forward, Backward, or Invalid. This is the state of the seat back recline switch.

Reverse Gear

--

Inactive

The scan tool displays Active or Inactive. This parameter displays if the vehicle is in reverse gear.

Right Exterior Mirror Communication

--

Okay

The scan tool display Okay or Not Okay. This parameter confirms if the scan tool can communicate with the right hand exterior rear-view mirror.

Right Exterior Mirror Switch

--

Inactive

The scan tool displays Up, Down, Left, Right, or Inactive. When the mirror switch is pressed, this parameter displays the selected mirror direction.

Shift Lever Position

User Dependant

P

The scan tool displays P, R, N, D, 3, 2, or 1. This parameter displays the position of the transmission selector.

Start Wait Active

--

No

The scan tool displays Yes or No. Only when there has been a cold-start reset will the scan tool display No. A cold-start reset will occur when module detects too much electromagnetic interference (EMI) in the system. If the Start Wait Active displays No, the system will still be operational.

System Power Mode

--

Run

The scan tool displays Off, Accessory, Run, Crank, Invalid. This is the Power Mode required for the System to run.

Vehicle Speed

--

km/h

This parameter indicates the vehicle speed calculated by the control module based on an input from the vehicle speed sensor (VSS). The scan tool will display a high value at higher vehicle speeds, and a low value at lower vehicle speeds.

Memory Seat Module Scan Tool Actuator Test

Output Control

Description

Chime

This output control is used to command the chime ON and OFF.

Button 1 Output

This output control is used to command the driver seat to move to the driver 1 memory position.

Button 2 Output

This output control is used to command the driver seat to move to the driver 2 memory position.

Button 3 Output

This output control is used to command the driver seat to move to the driver 3 memory position.

Front Vertical Motor

This output control is used to command the driver seat front vertical motor Up and Down.

Horizontal Motor

This output control is used to command the driver seat forward and rearward.

Lumbar Motor

This output control is used to command the driver seat lumbar support motor forward and rearward.

Rear Vertical Motor

This output control is used to command the driver seat rear vertical motor Up and Down.

Recline Motor

This output control is used to command the driver seat back recline motor forward and rearward.