GM Service Manual Online
For 1990-2009 cars only
Table 1: Assist Step Control Module Scan Tool Data List
Table 2: Assist Step Control Module Scan Tool Output Controls

Assist Step Control Module Scan Tool Data List

Parameter

System State

Expected Value

Definition

Operating Conditions: Vehicle Running, All Doors Closed

ASC Disable Switch

--

Inactive

The scan tool displays Active or Inactive.This displays the state of the ASC switch.

ASC Learn Status

--

Passed

The scan tool displays Running,Passed, and Canceled. This parameter displays the learned status of the ASC module.

ASC System Status

--

Passed

The scan tool displays Unknown, Normal, Disabled, or Locked. This parameter displays the status of the ASC system.

Battery Voltage

--

Varies

The scan tool displays Volts. This is the current battery voltage.

Driver Door Ajar Sw.

--

Stop

The scan tool displays Door Closed, and Door Ajar. This is the status of the driver door ajar switch.

Left ASC Board Commanded

--

Varies

The scan tool displays Off, Unknown, Retract, Extend. This displays the commanded position of the left running board.

Left ASC Board Position

--

Varies

This diplays counts. The parameter displays the running boards position in counts 0-255

Left ASC Board Learned

--

yes

The scan tool displays Yes or No. This lets you know if the ASC board has learned it's fully extended and fully retracted limits.

Left Rear Door Ajar Sw

--

Varies

The scan tool displays Door Closed, and Door Ajar. This is the status of the left rear door ajar switch.

Manufacturers Enable Counter

--

Varies

This displays counts. Counts from 256-0.

Passenger Door Ajar Sw

--

Varies

The scan tool displays Door Closed, and Door Ajar. This is the status of the passenger door ajar switch.

Right Rear Door Ajar Sw

--

Varies

The scan tool displays Door Closed, and Door Ajar. This is the status of the right rear door ajar switch.

Right ASC Board Commanded

--

Varies

The scan tool displays Off, Unknown, Retract, Extend. This displays the commanded position of the right running board.

Right ASC Board Learned

--

Yes

The scan tool displays Yes or No. This lets you know if the ASC board has learned it's fully extended and fully retracted limits.

Right ASC Board Position

--

Varies

This displays counts. The parameter displays the running boards position in counts 0-255


Assist Step Control Module Scan Tool Output Controls

Scan Tool Output Control

Additional Menu Selections

Description

Left ASC Motor Test

Special Functions

This test fully deploys the assist step and then retract the assist step.

Right ASC Motor Test

Special Functions

This test fully deploys the assist step and then retract the assist step.