Hummer H2. Manual - part 411

SCAN TOOL DATA DEFINITIONS 

Fob 1 Battery  

The scan tool displays OK to indicate a good battery voltage level was last received. 

Fob 2 Battery  

The scan tool displays OK to indicate a good battery voltage level was last received. 

Fob 3 Battery  

The scan tool displays OK to indicate a good battery voltage level was last received. 

Fob 4 Battery  

The scan tool displays OK to indicate a good battery voltage level was last received. 

Last Fob Button Pressed  

The scan tool displays Dr. Door Unlock, All Door Unlock, Door Lock, indicating the last input received 
from a programmed fob. 

Last Fob Used  

The scan tool displays FOB 1-4 to indicate the number of the last transmitter used 

Fob 1 Programmed  

The scan tool displays Yes/No. The scan tool displays Yes if a transmitter is programmed to this numeric 
position. 

Fob 2 Programmed  

The scan tool displays Yes/No. The scan tool displays Yes if a transmitter is programmed to this numeric 
position. 

Fob 3 Programmed  

Last Fob Button Pressed

Passenger Door Module Data

Lock, Unlock, Panic

Unlock

Last FOB Used

Passenger Door Module Data

FOB 1-4

FOB 1

Fob 1 Programmed

Passenger Door Module Data

Yes, No

Yes

Fob 2 Programmed

Passenger Door Module Data

Yes, No

Yes

Fob 3 Programmed

Passenger Door Module Data

Yes, No

No

Fob 4 Programmed

Passenger Door Module Data

Yes, No

No

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Keyless Entry - Hummer H2

  

The scan tool displays Yes/No. The scan tool displays Yes if a transmitter is programmed to this numeric 
position. 

Fob 4 Programmed  

The scan tool displays Yes/No. The scan tool displays Yes if a transmitter is programmed to this numeric 
position. 

SYMPTOMS - KEYLESS ENTRY 

Visual/Physical Inspection 

z

Inspect for aftermarket devices which could affect the operation of the Remote Keyless Entry System. 
Refer to Checking Aftermarket Accessories in Wiring Systems.  

z

Inspect the easily accessible or visible system components for obvious damage or conditions which could 
cause the symptom.  

Intermittent 

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for 
Intermittent Conditions and Poor Connections in Wiring Systems. 

Symptom List 

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom: 

z

Panic Mode Inoperative  

z

Keyless Entry System Inoperative  

PANIC MODE INOPERATIVE 

Panic Mode Inoperative 

IMPORTANT: The following steps must be completed before using the symptom tables. 

1. Perform Diagnostic System Check - Remote Keyless Entry before using 

the Symptom Tables in order to verify that all of the following are true. 

z

There are no DTCs set.  

z

The control module(s) can communicate via the serial data link.  

2. Review the system operation in order to familiarize yourself with the 

system functions. Refer to Keyless Entry System Description and 
Operation .  

Step

Action

Yes

No

1

Did you perform the Diagnostic 
System Check?

Go to Diagnostic System 
Check - Remote Keyless 

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Keyless Entry - Hummer H2

  

KEYLESS ENTRY SYSTEM INOPERATIVE 

Keyless Entry System Inoperative 

Go to Step 2

Entry

2

With the keyless entry 
transmitter, attempt to operate 
the panic function. 
Do both the horns and the park 
lamps pulse on and off?

Go to Testing for Intermittent 

Conditions and Poor Connections 

in Wiring Systems

Go to Step 3

3

Do any of the panic functions 
operate?

Go to Step 4

Go to Keyless Entry 

System Inoperative

4

Do the horns pulse on and off?

Go to Diagnostic System Check - 

Lighting Systems in Lighting 

Systems

Go to Diagnostic System 

Check - Horns in Horns

Step

Action

Yes

No

1

Did you perform the Diagnostic System Check?

Go to Step 2

Go to Diagnostic 

System Check - 

Remote Keyless 

Entry

2

Press each button of the transmitter one at a time. 
Does the system operate normally?

Go to Testing for 

Intermittent Conditions 

and Poor Connections in 

Wiring Systems

Go to Step 3

3

Lock and unlock the door locks using the controls 
inside the vehicle. 
Do the locks operate properly?

Go to Step 4

Go to Diagnostic 

System Check - 

Door Systems in 

Doors

4

1. Turn on the J 43241 Keyless Entry Tester. 

See Special Tools and Equipment .  

2. Place the transmitter on the J 43241 test pad. 

See Special Tools and Equipment .  

3. Press each button of the transmitter one at a 

time.  

Does a tone sound and the green light illuminate on 
the J 43241 after each button is pressed? See 
Special Tools and Equipment .

IMPORTANT:

Inspect that the keyless entry transmitter is the 
correct model for the vehicle remote system. A 
wrong model transmitter may pass this test but 
will not activate the vehicle remote system.

Go to Step 8

Go to Step 5

Do any of the buttons on the transmitter sound the 

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Keyless Entry - Hummer H2

  

REPAIR INSTRUCTIONS 

TRANSMITTER BATTERY REPLACEMENT 

Removal Procedure 

Under normal use, the battery in the transmitter will last about 2 years, form battery replacement, use a 
Panasonic 3 volt, type CR2032, or the equivalent. 

1. In order to open the transmitter case, perform the following steps: 

1. Insert a dime between the two halves of the transmitter near the key ring hole. 

5

tone and illuminate the green light when pressed?

Go to Step 9

Go to Step 6

6

Replace the transmitter battery. Refer to 
Transmitter Battery Replacement . 
Did you complete the replacement?

Go to Step 7

-

7

1. Turn on the J 43241 Keyless Entry Tester. 

See Special Tools and Equipment .  

2. Place the transmitter on the J 43241 test pad. 

See Special Tools and Equipment .  

3. Press each button of the transmitter one at a 

time.  

Does a tone sound and the green light illuminate on 
the J 43241 after each button is pressed? See 
Special Tools and Equipment .

Go to Step 8

Go to Step 9

8

Perform the transmitter synchronization procedure. 
Refer to Transmitter Resynchronization . 
Did the locks cycle to lock then unlock?

Go to Step 12

Go to Step 10

9

Replace the transmitter. 
Did you complete the replacement?

Go to Step 10

-

10

Perform the transmitter programming procedure. 
Refer to Transmitter Programming . 
Did the locks cycle to lock then unlock?

Go to Step 12

Go to Step 11

11

Replace the PDM. Refer to Switch Replacement - 
Door Lock and Side Window - Passenger in 
Doors.Did you complete the replacement?

IMPORTANT:

When replacing the Passenger Door Module 
(PDM), perform the Program all Transmitters 
procedure. Refer to Transmitter Programming .

Go to Step 12

-

12

Operate the system in order to verify the repair. 
Did you correct the condition?

System OK

Go to Step 3

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Keyless Entry - Hummer H2