Hummer H2. Manual — part 633
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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2004 ACCESSORIES & EQUIPMENT Doors - Hummer H2
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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2004 ACCESSORIES & EQUIPMENT Doors - Hummer H2
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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2004 ACCESSORIES & EQUIPMENT Doors - Hummer H2
DTC. The history DTC will clear either after 50 ignition switch cycles without a repeated failure or in response
to a scan tool command.
DTC B1023
DTC B1544, B1600, OR B1605
Circuit Description
The driver door and passenger door modules supply battery positive voltage and ground on opposing mirror
motor control circuits upon receipt of a mirror switch activation or a class 2 message commanding mirror
Step
Action
Yes
No
Schematic Reference: Power Window Schematics or Door Lock/Indicator Schematics
Connector End View Reference:Power Door Systems Connector End Views
1
Did you perform the Door Systems Diagnostic
System Check?
Go to Step 2
Go to Diagnostic
System Check -
Door Systems
2
1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF.
3. Observe the appropriate switch parameter in
the input list using the scan tool.
Does the scan tool display an inactive state?
Go to Step 3
Go to Step 4
3
1. Activate the switch in both directions.
2. Observe the switch parameter using the scan
tool.
Does the switch parameter change state?
Go to Testing for
Intermittent Conditions
and Poor Connections in
Wiring Systems
Go to Step 4
4
Inspect for poor connections/terminal tension at the
door module harness connector. Refer to Testing for
Intermittent Conditions and Poor Connections
and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 6
Go to Step 5
5
Replace the appropriate door module. Refer to
Switch Replacement - Door Lock and Side
Window - Driver or Switch Replacement - Door
Lock and Side Window - Passenger .
Did you complete the replacement?
Go to Step 6
-
6
1. Clear the DTCs using the scan tool.
2. Operate the vehicle within the Conditions for
Running the DTC as specified in the
supporting text.
Does the DTC reset?
Go to Step 2
System OK
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