Hummer H2. Manual — part 498

Dimming Enable

The dimming enable reflects the state of the dimming for the various indicators located on the PDM.

Dimming Potentiometer

The dimming potentiometer data parameter reflects the level of lighting, in percent for both the
backlighting and indicators for the PDM.

Door Ajar Switch

This parameter reflects the current status of the door ajar switch input to the PDM.

Door Lock Motor

This parameter indicates the current status of the door lock motor.

Door Lock Switch

This parameter indicates the current status of the door lock switch.

Heat Indicator High

This data parameter appears in two separate data-lists inputs and outputs. While monitoring the inputs for
the PDM this parameter reflects the requested state for the heat indicator low. When monitoring the
outputs the parameter reflects the commanded state for the heat indicator low.

Heat Indicator Low

This data parameter appears in two separate data-lists inputs and outputs. While monitoring the inputs for
the PDM this parameter reflects the requested state for the heat indicator low. When monitoring the
outputs the parameter reflects the commanded state for the heat indicator low.

Heat Indicator Medium

This data parameter appears in two separate data-lists inputs and outputs. While monitoring the inputs for
the PDM this parameter reflects the requested state for the heat indicator medium. When monitoring the
outputs the parameter reflects the commanded state for the heat indicator medium.

Heated Seat Mode

This parameter indicates the status of the heated seat feature.

Right Front Window Status

This parameter indicates the status of the right front window.

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Memory Switch

This data parameter provides the status of the memory switch.

Mirror 5 Volt Reference

This data parameter provides a status indication of the 5-volt reference circuit for the OSRV position
sensors.

Mirror Fold Motor Current

This parameter provides the detected amount of current (in mA) that is required to perform the active
mirror fold action.

Mirror Folding Operation

This parameter indicates the mirror fold operation currently in process.

Mirror Heater

This parameter indicates the operational state of the mirror heater.

Mirror Horizontal Position

This parameter provides OSRV mirror horizontal position in volts.

Mirror Motor

This parameter provides information regarding the state of operation the mirror is currently activating.

Mirror Select Switch

This parameter indicates the current mirror select switch position.

Mirror Switch Backlight

The mirror switch backlight data parameter reflects the level of backlighting, in percent for the mirror
switch.

Mirror Switch Horizontal

This data parameter provides the current status of the OSRV horizontal position adjustment switch.

Mirror Switch Vertical

This data parameter provides the current status of the OSRV vertical position adjustment switch.

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Mirror Vertical Position

This parameter provides OSRV mirror vertical position information in volts.

Program Software P/N

This is the part number stored indication of the revision level of the program software.

Program Software Suffix

This suffix number is the stored indication of the revision level of the program software.

Right Front Window Status

This parameter indicates the status of the right front window.

Right Rear Window Status

This parameter indicates the status of the right rear window.

Window Motor Current

This parameter indicates the active status of the window lockout feature.

Window Motor Output

This parameter reflects the state of the PDM output to the window motor.

Window Switch Backlight

The window switch backlight data parameter reflects the level of backlighting, in percent for the window
switch.

DIAGNOSTIC TROUBLE CODE (DTC) LIST

Diagnostic Trouble Code (DTC) List

DTC

Diagnostic Procedure

Module(s)

B1023

DTC B1023

DDM/PDM

B1544

DTC B1544, B1600, or B1605

DDM/PDM

B1580

DTC B1580, B1590, B1610, or B1620

DDM/PDM

B1590

DTC B1580, B1590, B1610, or B1620

DDM/PDM

B1600

DTC B1544, B1600, or B1605

DDM/PDM

B1605

DTC B1544, B1600, or B1605

DDM/PDM

B1610

DTC B1580, B1590, B1610, or B1620

DDM/PDM

B1620

DTC B1580, B1590, B1610, or B1620

DDM/PDM

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DTC B1023

Circuit Description

The switch that failed and generated this diagnostic trouble code (DTC) is part of the DDM or the PDM. When
a switch is activated, the DDM/PDM then either actuates the appropriate component or sends a message over
the serial data link to the appropriate module to actuate the appropriate component.

Conditions for Running the DTC

z

System voltage is between 9.0 and 16 volts.

z

Ignition switch is in the ON position.

Conditions for Setting the DTC

If the DDM or the PDM receives multiple inputs from a single switch at the same time for more then 160
milliseconds, the DDM/PDM sets the DTC. The following switches will set this DTC:

z

The door lock switch

z

The power window switch

z

The window lockout switch

z

The mirror select switch

Action Taken When the DTC Sets

The DDM/PDM ignores the continuous inputs from the switch. The DDM/PDM will not respond to the invalid
inputs as a command for the component. The DDM/PDM will respond to all other valid switch inputs.

Conditions for Clearing the DTC

When the switch input status changes, the DDM/PDM clears this current DTC and stores the DTC as a history

B1640

DTC B1640 or B1645

DDM/PDM

B1645

DTC B1640 or B1645

DDM/PDM

B1722

DTC B1722

DDM/PDM

B3808

DTC B3808

BCM

B3809

DTC B3809

BCM

B3819

DTC B3819

BCM

B3820

DTC B3820

BCM

B3821

DTC B3821

BCM

B3822

DTC B3822

BCM

B3823

DTC B3823

BCM

B3824

DTC B3824

BCM

B3825

DTC B3825

BCM

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