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