GM Service Manual Online
For 1990-2009 cars only

Headlamp Leveling Control Module Scan Tool Information Left

Table 1: Left Headlamp Leveling Module Scan Tool Data Parameters
Table 2: Left Headlamp Leveling Module Scan Tool Output Controls

Left Headlamp Leveling Module Scan Tool Data Parameters

Parameter

Expected Value

Definition

Operating Conditions: Ignition ON

Battery Voltage

Varies

This displays Volts. This is the current battery system voltage.

Front Sensor

Varies

This displays % DC.

Low Beam Input

Varies

This displays Volts. This is the current low beam input voltage.

Manufacture Date

Varies

This displays the date the module was manufactured.

Rear Sensor

Varies

This displays % DC.

Stepper Motor Position

Varies

This displays Counts. This is the current position of the stepper motor measure in counts.

Left Headlamp Leveling Module Scan Tool Output Controls

Scan Tool Output Control

Description

Calibrate Module

This command will calibrate this headlamp leveling module.

Headlamp Motor Test

This command will enable the left headlamp leveling motor test.

Headlamp Leveling Control Module Scan Tool Information Right

Table 1: Right Headlamp Leveling Module Scan Tool Data Parameters
Table 2: Right Headlamp Leveling Module Scan Tool Output Controls

Right Headlamp Leveling Module Scan Tool Data Parameters

Parameter

Expected Value

Definition

Operating Conditions: Ignition ON

Battery Voltage

Varies

This displays Volts. This is the current battery system voltage.

Front Sensor

Varies

This displays % DC.

Low Beam Input

Varies

This displays Volts. This is the current low beam input voltage.

Manufacture Date

Varies

This displays the date the module was manufactured.

Rear Sensor

Varies

This displays % DC.

Stepper Motor Position

Varies

This displays Counts. This is the current position of the stepper motor measure in counts.

Right Headlamp Leveling Module Scan Tool Output Controls

Scan Tool Output Control

Description

Calibrate Module

This command will calibrate this headlamp leveling module.

Headlamp Motor Test

This command will enable the right headlamp leveling motor test.