Hummer H2. Manual - part 184

 

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Hummer H2. Manual - part 184

 

 

The year when module was built. 

DIAGNOSTIC TROUBLE CODE (DTC) LIST 

Diagnostic Trouble Code (DTC) List 

DTC B1000 

Circuit Description 

The internal fault detection is handled inside the control module. No external circuits are involved. 

Conditions for Running the DTC 

The module runs the program to detect an internal fault when power up is commanded. The only requirements 
are voltage and ground. This program runs even if the voltage is out of the valid operating range. 

Conditions for Setting the DTC 

The module has detected an internal malfunction. 

Action Taken When the DTC Sets 

The module refuses all additional inputs. 

Conditions for Clearing the DTC 

z

A current DTC clears when the malfunction is no longer present.  

z

A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat 
of the malfunction.  

Diagnostic Aids 

z

This DTC may be stored as a history DTC without affecting the operation of the module. If stored only as 
a history DTC and not retrieved as a current DTC, do not replace the module.  

DTC

Diagnostic 

Procedure

Module

B1000 DTC B1000

Audio Amplifier, BCM, DDM, DSM, FPDM, HVAC, IPC, Radio, SDM, 
VCIM

B1004 DTC B1004

VCIM

B1007 DTC B1007

VCIM

B1009 DTC B1009

VCIM

B1397 DTC B1397

BCM

B1440 DTC B1440

BCM

C0550 DTC C0550

EBCM, ESC, TCSCM

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Body Control System - Hummer H2

  

z

If this DTC is retrieved as both a current and history DTC, replace the module.  

DTC B1000 

DTC B1004 

Circuit Description 

The internal fault detection is handled inside the control module. No external circuits are involved. 

Conditions for Running the DTC 

The module microprocessor must be active/awake. 

Conditions for Setting the DTC 

This DTC indicates the KAM in the module has been reset. It is a normal occurrence when battery positive 
voltage or ground is removed from the module, such as a battery disconnect. 

Action Taken When the DTC Sets 

The microprocessor reverts back to the base programmed critical operating data until new data is learned and 

Step

Action

Yes

No

1

Did you perform the Diagnostic System Check for the 
system exhibiting the symptom?

Go to 

Step 2

Go to Control Module 

References for the applicable 

Diagnostic System Check

2

1. Install a scan tool.  

2. Turn ON the ignition, with the engine OFF.  

3. Retrieve DTCs.  

Is the DTC retrieved as a current DTC?

Go to 

Step 3

Go to Diagnostic Aids

3

Replace the control module setting the DTC as current. 
Refer to Control Module References .Did you 
complete the replacement?

IMPORTANT:

Perform the programming or setup procedure for the 
module if required.

Go to 

Step 4

-

4

1. Use the scan tool in order to clear the DTCs.  

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

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Body Control System - Hummer H2

  

stored in KAM. 

Conditions for Clearing the DTC 

z

A current DTC clears when the malfunction is no longer present.  

z

A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat 
of the malfunction.  

Diagnostic Aids 

z

This DTC may be stored as a history DTC without affecting the operation of the module. If stored only as 
a history DTC and not retrieved as a current DTC, do not replace the module.  

z

If this DTC is retrieved as both a current and history DTC, replace the module.  

DTC B1004 

DTC B1007 

Circuit Description 

As part of normal data processing, the module performs a data programming check on its writes to the 
electrically erasable read only memory (EEPROM). The EEPROM write error detection is handled inside the 

Step

Action

Yes

No

1

Did you perform the Diagnostic System Check for the 
system exhibiting the symptom?

Go to 

Step 2

Go to Control Module 

References for the applicable 

Diagnostic System Check

2

1. Install a scan tool.  

2. Turn ON the ignition, with the engine OFF.  

3. Retrieve DTCs.  

Is the DTC retrieved as a current DTC?

Go to 

Step 3

Go to Diagnostic Aids

3

Replace the control module setting the DTC as current. 
Refer to Control Module References .Did you 
complete the replacement?

IMPORTANT:

Perform the programming or setup procedure for the 
module if required.

Go to 

Step 4

-

4

1. Use the scan tool in order to clear the DTCs.  

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

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Body Control System - Hummer H2

  

control module. No external circuits are involved.

Conditions for Running the DTC 

The module runs the program to detect an EEPROM write error. The only requirements are battery positive 
voltage and ground. This program runs even if the battery positive voltage is out of the valid operating range. 

Conditions for Setting the DTC 

The module writes information to a data block in the EEPROM. The module then reads the data and compares it 
to what was sent to the data block. If the data does not match after 3 consecutive attempts, the module sets the 
DTC. 

Action Taken When the DTC Sets 

The module writes to another area of the EEPROM, this becomes the new permanent area to store the data. The 
data location is allowed to change until all of the available EEPROM is used. If a B1004 DTC is also set, the 
module reverts to base operation values programmed for those blocks of data that have failed. The blocks of 
data that have not failed the checksum test are not affected. 

Conditions for Clearing the DTC 

z

A current DTC clears when the malfunction is no longer present.  

z

A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat 
of the malfunction.  

Diagnostic Aids 

z

This DTC may be stored as a history DTC without affecting the operation of the module. If stored only as 
a history DTC and not retrieved as a current DTC, do not replace the module.  

z

If this DTC is retrieved as both a current and history DTC, replace the module.  

DTC B1007 

Step

Action

Yes

No

1

Did you perform the Diagnostic System Check for the 
system exhibiting the symptom?

Go to 

Step 2

Go to Control Module 

References for the applicable 

Diagnostic System Check

2

1. Install a scan tool.  

2. Turn ON the ignition, with the engine OFF.  

3. Retrieve DTCs.  

Is the DTC retrieved as a current DTC?

Go to 

Step 3

Go to Diagnostic Aids

IMPORTANT:

Perform the programming or setup procedure for the 
module if required.

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Body Control System - Hummer H2

  

 

 

 

 

 

 

 

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