Hummer H2. Manual - part 497

2

1. Turn ON the ignition, with the 

engine OFF.  

2. Attempt to establish 

communication with the 
following modules: 

z

The driver door module  

z

The passenger door 
module  

z

The body control module  

z

The powertrain control 
module  

z

The instrument panel 
cluster  

Does the scan tool communicate with 
all of the modules?

Go to Step 3

Go to Scan Tool Does Not 

Communicate with Class 2 

Device in Data Link 

Communications

3

1. Access the Class 2 Power Mode 

in the Diagnostic Circuit Check 
on the scan tool.  

2. Rotate the ignition switch 

through all positions while 
observing the ignition switch 
power mode parameter.  

Does the ignition switch parameter 
reading match the ignition switch 
position for all switch positions?

IMPORTANT:

The engine may start during the 
following step. Turn OFF the engine 
as soon as you have observed the 
Crank power mode.

Go to Step 4

Go to Power Mode 

Mismatch in Body Control 

System

4

With the scan tool, select the Display 
DTCs function for each of the 
following modules: 

z

The driver door module  

z

The passenger door module  

z

The body control module  

z

The powertrain control module  

z

The instrument panel cluster  

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Doors - Hummer H2

  

SCAN TOOL DATA LIST 

Driver Door Module/Passenger Door Module 

 
Does the scan tool display any DTCs?

Go to Step 5

Go to Symptoms - Doors

5

Does the scan tool display any DTCs 
which begin with a "U"?

Go to Scan Tool Does Not 

Communicate with Class 2 

Device in Data Link 

Communications

Go to Step 6

6

Does the scan tool display B1000 for 
any of the modules?

Go to Diagnostic Trouble 

Code (DTC) List in Body 

Control System

Go to Diagnostic Trouble 

Code (DTC) List

Scan Tool Parameter

Data List

Units Displayed

Typical Data 

Value

Ignition ON/Engine OFF/Vehicle in PARK/All Doors Closed

Battery 1 (Low 
Current)

Data

Volts

12.8

Battery 2 (High 
Current)

Data

Volts

12.8

Boot S/W Part No.

Module Info.

Decimal

15XXXXXX

Boot S/W Suffix

Module Info.

ASCII

15XXXXXX

Cal. Module 1 Part No.

Module Info.

Decimal

15XXXXXX

Cal. Module 1 Part No.

Module Info.

ASCII

15XXXXXX

Cal. Module 2 Part No.

Module Info.

Decimal

15XXXXXX

Cal. Module 2 Part No.

Module Info.

ASCII

15XXXXXX

Door Ajar Switch

Inputs

On, Off

Off

Door Key Unlock

Inputs

Inactive/Active

Inactive

Door Lock Motor

Outputs

Idle, Lock, Unlock

Idle

Door Lock Switch

Outputs

Idle, Lock, Unlock

Idle

Driver LF Window 
Switch

Inputs

Idle, Up, Down, Express Down

Idle

Driver RF Window 
Switch

Inputs

Idle, Up, Down, Express Down

Idle

LR Window Switch

Inputs

Idle, Up, Down

Idle

Memory Switch

Inputs

Idle, Both, Memory 1, Memory 2

Idle

Mirror 5 Volt 
Reference

Outputs

On, Off

5 Volts

Mirror Fold Motor 
Current

Data

mA

0

Mirror Folding 
Operation

Outputs

Idle, Extend, Retract

Idle

Mirror Heater

Outputs

Inactive, Active

Inactive

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Doors - Hummer H2

  

Body Control Module 

SCAN TOOL DATA DEFINITIONS 

The Passenger Door Module (PDM) scan tool data definitions are a brief description of each of the related 
parameters displayed within the scan tool data display(s) for the PDM.

Mirror Horizontal 
Position

Data

Volts

Varies

Mirror Motor

Outputs

Idle, Left, Right, Up, Down

Idle

Mirror Select Switch

Inputs

Neutral/Fold, Left, Right

Neutral

Mirror Switch

Inputs

Off, Up, Down, Left. Right, Extend, 

Retract

Off

Mirror Vertical Position

Data

Volts

Varies

Operational S/W Part 
No.

Module 

Information

Decimal

15XXXXXX

Operational S/W Suffix

Module 

Information

ASCII

XX

Psgr RF Window 
Switch

Inputs

Idle/Up/Down/Express Down

Idle

Right Rear Window 
Status

Inputs

Idle, Up, Down

Idle

Window Lockout 
Switch

Inputs

Inactive/Active

Inactive

Window Lockout LED

Outputs

On, Off

Off

Window Motor Current

Data

mA

0

Window Motor Output

Outputs

Idle, Up, Down

Idle

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON/Engine OFF/Vehicle in PARK/All doors closed

Battery Voltage

Data

Volts

Varies

Door Lock Switch

Inputs

Inactive/Active

Inactive

Door Unlock Switch

Inputs

Inactive/Active

Inactive

Key in Ignition

Inputs

Yes/No

Yes

Left Rear Door Ajar Sw.

Inputs

On/Off

Off

Right Rear Door Ajar Sw.

Inputs

On/Off

Off

Rear Door Lock Relay

Outputs

On/Off

Off

Rear Door Unlock

Outputs

On/Off

Off

Right Rear Window Up Relay

Outputs

Inactive/Active

Inactive

Right Rear Window Down Relay

Outputs

Inactive/Active

Inactive

Left Rear Window Up Relay

Outputs

Inactive/Active

Inactive

Left Rear Window Down Relay

Outputs

Inactive/Active

Inactive

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Doors - Hummer H2

  

Back Only Heat Indicator  

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 back only indicator. When monitoring the 
outputs the parameter reflects the commanded state for the back only indicator. 

Back Only Heat Mode  

This data parameter reflects the operating state of the heated seat back only mode of operation. This mode 
of operation is only available if the heated seat is active or on. 

Backlighting Dimming Enabled  

This data parameter indicates the status feature. Backlighting is the lighting from behind any text or 
characters on the PDM switches or faceplate. 

Base Software P/N  

This is the part number stored within the PDM of the base software set required to activate the PDM. This 
software set is often referred to as boot software. 

Base Software Suffix  

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

Battery 1 (Low Current)  

The battery 1 (low current) parameter provides the voltage level on the battery 1 input. Battery 1 is the 
low current input provides the power for the PDM's microprocessors and the low current outputs. 

Battery 2 (High Current)  

The battery 2 (high current) parameter provides the voltage level on the battery 2 input. Battery 2 is the 
high current input provides the power for the PDM's high current outputs such as the power windows. 

Calibration P/N  

This is the part number stored within the PDM of the calibration set. The calibration software sets the 
operational ranges and option levels for each of the PDM's functions. This software set is often referred to 
as calibration software or calibration. 

Calibration Suffix  

This suffix number is the stored indication of the revision level of the calibration. This is often referred to 
as the CAL ID. 

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Doors - Hummer H2