Hummer H2. Manual — part 512

POWER DOOR LOCKS INOPERATIVE - ONE DOOR OR SWITCH

Power Door Locks Inoperative - One Door or Switch

32

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

Go to Step 33

-

33

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

System OK

Go to Step 2

Step

Action

Yes

No

Schematic Reference: Door Lock/Indicator Schematics
Connector End View Reference: Power Door Systems Connector End Views
DEFINITION: This diagnostic table should be used to diagnose a failure of the rear door lock switch or
one rear door lock actuator.

1

Did you perform the Door Systems Diagnostic
System Check?

Go to Step 2

Go to Diagnostic

System Check -

Door Systems

2

Activate the rear door lock switch to the lock and
unlock positions.
Do both rear passenger doors lock and unlock?

Go to Testing for

Intermittent Conditions

and Poor Connections in

Wiring Systems

Go to Step 3

3

1. Install a scan tool.

2. Monitor the rear door lock switch data

parameter in the BCM data list.

Is the data parameter active without a switch
activation?

Go to Step 5

Go to Step 4

4

1. With the scan tool, monitor the rear door lock

switch data parameter in the BCM data list.

2. Activate the door lock switch to both the lock

and unlock positions.

Does the data parameter change with each switch
activation?

Go to Step 7

Go to Step 6

5

Disconnect the rear door lock switch.
Does the data parameter now display an inactive
state?

Go to Step 10

Go to Step 9

6

1. Disconnect the rear door lock switch.

2. Connect a test lamp to ground.

3. Probe the rear door lock switch ground circuit.

Does the test lamp illuminate?

Go to Step 9

Go to Step 13

1. Disconnect the inoperative door lock actuator.

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Doors - Hummer H2

7

2. With a test lamp connected to a good ground,

probe the door lock actuator lock circuit at the
door lock actuator harness connector.

3. Activate a door lock switch to lock position.

Does the test lamp illuminate?

Go to Step 8

Go to Step 14

8

1. With a test lamp connected to a good ground,

probe the door lock actuator unlock circuit at
the door lock actuator harness connector.

2. Activate a door lock switch to unlock position.

Does the test lamp illuminate?

Go to Step 12

Go to Step 15

9

Test for an open or short to ground in the door lock
switch lock and unlock signal circuits. Refer to
Circuit Testing and Wiring Repairs in Wiring
Systems.
Did you find and correct the condition?

Go to Step 19

Go to Step 11

10

Inspect for poor connections at the harness
connector of the rear door lock 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 19

Go to Step 16

11

Inspect for poor connections at the harness
connector of the body control module. 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 19

Go to Step 17

12

Inspect for poor connections at the harness
connector of the door lock actuator. 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 19

Go to Step 18

13

Repair the open in the rear door lock switch ground
circuit. Refer to Wiring Repairs in Wiring Systems.
Did you complete the repair?

Go to Step 19

-

14

Repair the open the door lock actuator lock circuit.
Refer to Wiring Repairs in Wiring Systems.
Did you find and correct the condition?

Go to Step 19

-

15

Repair the open in the door lock actuator unlock
circuit. Refer to Wiring Repairs in Wiring Systems.
Did you find and correct the condition?

Go to Step 19

-

Replace the rear door lock switch.

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Doors - Hummer H2

POWER DOOR LOCKS INOPERATIVE - ENDGATE/LIFTGATE

Power Door Locks Inoperative - Endgate/Liftgate

16 Did you complete the repair?

Go to Step 19

-

17

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

IMPORTANT:

Perform the set procedure for the BCM. Refer to
Body Control Module (BCM) Programming/RPO
Configuration in Body Control System.

Go to Step 19

-

18

Replace the rear door lock actuator. Refer to Latch
Replacement - Rear Door .
Did you complete the repair?

Go to Step 19

-

19

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

System OK

Go to Step 2

Step

Action

Yes

No

Schematic Reference: Door Lock/Indicator Schematics
Connector End View Reference: Power Door Systems Connector End Views

1

Did you perform the Door Systems Diagnostic System
Check?

Go to

Step 2

Go to Diagnostic System Check

- Door Systems

2

Activate the door lock switches to the lock and unlock
positions.
Do both rear passenger doors lock and unlock?

Go to

Step 3

Go to Power Door Locks

Inoperative (Front Door(s)) or

Power Door Locks Inoperative

(Rear Door(s))

3

Is the liftgate lock actuator inoperative?

Go to

Step 4

Go to Testing for Intermittent

Conditions and Poor

Connections in Wiring Systems

4

1. Disconnect the liftgate lock actuator.

2. With a test lamp connected to a good ground,

probe the lock actuator lock circuit at the lock
actuator harness connector.

3. Activate a door lock switch to lock position.

Does the test lamp illuminate?

Go to

Step 5

Go to Step 7

5

1. With a test lamp connected to a good ground,

probe the lock actuator unlock circuit at the lock
actuator harness connector.

2. Activate a door lock switch to unlock position.

Does the test lamp illuminate?

Go to

Step 6

Go to Step 8

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Doors - Hummer H2

POWER MIRRORS INOPERATIVE

Power Mirrors Inoperative

6

Inspect for poor connections at the harness connector of
the liftgate lock actuator. 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 10

Go to Step 9

7

Repair the open the lock actuator lock circuit. Refer to
Circuit Testing and Wiring Repairs in Wiring
Systems.
Did you find and correct the condition?

Go to

Step 10

-

8

Repair the open in the lock actuator unlock circuit.
Refer to Circuit Testing and Wiring Repairs in
Wiring Systems.
Did you find and correct the condition?

Go to

Step 10

-

9

Replace the liftgate lock actuator. Refer to Lock
Actuator Replacement - Liftgate in Body Rear End.
Did you complete the repair?

Go to

Step 10

-

10

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

System

OK

Go to Step 2

Step

Action

Yes

No

Schematic Reference: Outside Mirror Schematics
Connector End View Reference:Power Door Systems Connector End Views

1

Did you perform the Door Systems Diagnostic
System Check?

Go to Step 2

Go to Diagnostic

System Check -

Door Systems

2

1. Place the mirror select switch in the left mirror

position.

2. Activate the mirror position switch in the UP,

DOWN, LEFT and RIGHT directions and
note the operation.

3. Place the mirror select switch in the right

mirror position.

4. Activate the mirror position switch in the UP,

DOWN, LEFT and RIGHT directions and
note the operation.

Do both power mirrors operate properly?

Go to Testing for

Intermittent Conditions

and Poor Connections in

Wiring Systems

Go to Step 3

1. Install a scan tool.

2. Monitor the mirror select switch and the

mirror switch data parameters.

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Doors - Hummer H2