Hummer H2. Manual — part 375

6

1. Turn OFF the ignition.

2. Disconnect the DIC switch connector.

3. Connect a 3-amp fused jumper wire

between the signal circuit of the suspect
DIC switch and a good ground. Refer to
Circuit Testing in Wiring Systems.

4. Turn ON the ignition, with the engine

OFF.

5. With a scan tool, observe the suspect DIC

Switch parameter.

Does the scan tool display ON for the suspect
switch?

Go to Step 10

Go to Step 8

7

Test the signal circuit of the suspect DIC switch
for a short to ground. Refer to Circuit Testing
and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?

Go to Step 14

Go to Step 11

8

Test the signal circuit of the suspect DIC switch
for an open or high resistance. Refer to Circuit
Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?

Go to Step 14

Go to Step 11

9

Test the ground circuit of the DIC switch for an
open or high resistance. Refer to Circuit Testing
and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?

Go to Step 14

Go to Step 10

10

Inspect for poor connections at the harness
connector of the DIC switch. 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 14

Go to Step 12

11

Inspect for poor connections at the harness
connector of the IPC. 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 14

Go to Step 13

12

Replace the DIC switch. Refer to Steering
Wheel Control Switch Assembly Replacement
in Steering Wheel and Column.
Did you complete the replacement?

Go to Step 14

-

13

Replace the IPC. Refer to Instrument Panel
Cluster (IPC) Replacement .
Did you complete the replacement?

Go to Step 14

-

Operate the system in order to verify the repair.

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Instrument Panel, Gauges, and Console - Hummer H2

CHIME ALWAYS ON

Chime Always On

14 Did you correct the condition?

System OK

Go to Step 2

Step

Action

Yes

No

Schematic Reference:Audible Warnings Schematics

1

Did you perform the Audible Warnings Diagnostic
System Check?

Go to Step 2

Go to Diagnostic System

Check - Audible

Warnings

2

Do any indicators illuminate when the chime
sounds?

Go to Symptoms -

Instrument Panel,

Gauges and

Console

Go to Step 3

3

1. Turn the ignition OFF.

2. Remove the key from the ignition.

3. Turn the headlamp switch to OFF.

4. Close all of the vehicles doors.

5. Open one or more of the vehicles doors

Does the chime sound at all times regardless if the
doors are open or closed?

Go to Step 16

Go to Step 4

4

1. Close all of the vehicles doors.

2. With a scan tool observe the Driver Door

Ajar Switch and the Passenger Door Ajar
Switch parameters in the BCM inputs data
list or the Door Ajar Switch parameters in
the DDM/PDM inputs data list.

Do all of the Door Ajar Switch parameters display
Off or Inactive?

Go to Step 5

Go to Courtesy Lamps

Always On in Lighting

Systems

5

With a scan tool observe the Left Rear Cargo Door
Ajar Switch and the Right Rear Door Ajar Switch
parameters in the BCM inputs data list.
Do all of the Door Switch parameters display
Inactive?

Go to Step 6

Go to Courtesy Lamps

Always On in Lighting

Systems

6

With a scan tool, observe the Cargo Door Ajar
Switch and the Hood Ajar Switch parameters in the
BCM inputs data list.
Does the Cargo Door Ajar Switch and the Hood
Ajar Switch parameters display Inactive?

Go to Step 7

Go to Courtesy Lamps

Always On in Lighting

Systems

1. Turn the ignition OFF.

2. Remove the key from the ignition.

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Instrument Panel, Gauges, and Console - Hummer H2

7

3. Turn the headlamp switch to OFF.

4. Open the drivers door.

Does the chime sound?

Go to Step 8

Go to Testing for

Intermittent Conditions

and Poor Connections in

Wiring Systems

8

1. Install a scan tool.

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

3. With a scan tool, observe the Parklamp

Switch parameter in the BCM inputs data
list.

Does the Parklamp Switch parameter display
inactive?

Go to Step 9

Go to Step 11

9

With a scan tool, observe the Headlamp Switch
parameter in the BCM inputs data list.
Does the Headlamp Switch parameter display
Inactive?

Go to Step 10

Go to Step 11

10

1. Turn the ignition OFF.

2. Remove the key from the ignition.

3. With a scan tool, observe the Key In Ignition

parameter in the BCM inputs data list.

Does the Key In Ignition parameter display No?

Go to Step 15

Go to Step 12

11

Test the headlamp input signal circuit and the park
lamp signal circuit at the BCM for a short to
voltage. Refer to Circuit Testing and Wiring
Repairs in Wiring Systems.
Did you find and correct the condition?

Go to Step 21

Go to Step 13

12

Test the key in ignition signal circuit for a short to
ground. Refer to Circuit Testing and Wiring
Repairs in Wiring Systems.
Did you find and correct the condition?

Go to Step 21

Go to Step 14

13

Inspect for poor connections at the harness
connector of the headlamp switch. 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 21

Go to Step 17

14

Inspect for poor connections at the harness
connector of the ignition key alarm switch. 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 21

Go to Step 18

Inspect for poor connections at the harness

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Instrument Panel, Gauges, and Console - Hummer H2

CHIME INOPERATIVE

Chime Inoperative

15

connector of the BCM. 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 21

Go to Step 19

16

Inspect for poor connections at the harness
connector of the radio or audio amplifier. 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 21

Go to Step 20

17

Replace the headlamp switch. Refer to Headlamp
Switch Replacement in Lighting Systems.
Did you complete the replacement?

Go to Step 21

-

18

Replace the ignition switch. Refer to Ignition
Switch Replacement in Steering Wheel and
Column.
Did you complete the replacement?

Go to Step 21

-

19

Replace the BCM. Refer to Body Control Module
Replacement in Body Control System.Did you
complete the replacement?

IMPORTANT:

Program the replacement BCM.

Go to Step 21

-

20

Replace the radio. Refer to Radio Replacement
orAmplifier Replacement in Entertainment.Did
you complete the replacement?

IMPORTANT:

Program the replacement radio or audio
amplifier.

Go to Step 21

-

21

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

System OK

Go to Step 3

Step

Action

Yes

No

Schematic Reference:Audible Warnings Schematics
DEFINITION: One or more chime functions are inoperative.

1

Did you perform the Audible Warning
Diagnostic System Check?

Go to Step 2

Go to Diagnostic

System Check -

Audible Warnings

1. Turn the ignition OFF, with the key

in the ignition.

Go to Testing for

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Instrument Panel, Gauges, and Console - Hummer H2