Hummer H2. Manual — part 444

POWER MIRRORS - FOLDING INOPERATIVE

Power Mirrors - Folding Inoperative

10

Replacement .
Did you complete the repair?

Go to Step 12

-

11

Replace the appropriate door module. Refer to
Switch Replacement - Door Lock and Side
Window - Driver or Switch Replacement - Door
Lock and Side Window - Passenger .Did you
complete the repair?

IMPORTANT:

Perform the set up procedure for the appropriate
door module. Refer to Service Programming
System (SPS) in 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 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. Turn ON the ignition, with the engine OFF.

2. Place the mirror select switch in the neutral

fold position.

3. Activate the mirror direction switch in the

left/extend and right/retract positions.

Do the outside rearview mirrors extend and retract
with the corresponding switch activation?

Go to Testing for

Intermittent Conditions

and Poor Connections in

Wiring Systems

Go to Step 3

3

Are both folding mirrors inoperative?

Go to Step 4

Go to Step 5

4

1. Install a scan tool.

2. Monitor the mirror select switch and the

mirror switch data parameters.

3. Activate the mirror select switch left, right and

neutral/fold positions.

4. Activate the left/extend and right/retract

functions from the mirror switch.

Do all of the data parameters change with the
corresponding switch activations?

Go to Step 5

Go to Step 6

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Doors - Hummer H2

5

1. Install a scan tool.

2. With the scan tool, observe the Mirror Folding

Operation data parameter in the appropriate
door module data list.

3. Command the inoperative mirror to retract and

extend using the mirror switch.

Does the Mirror Folding Operation data parameter
change states with the corresponding command?

Go to Step 7

Go to Step 8

6

Inspect for poor connections at the driver door
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 12

Go to Step 9

7

Inspect for poor connections at the power mirror.
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 12

Go to Step 10

8

Inspect for poor connections at the appropriate door
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 12

Go to Step 11

9

Replace the driver door module. Refer to Switch
Replacement - Door Lock and Side Window -
Driver .Did you complete the repair?

IMPORTANT:

Perform the set up procedure for the driver door
module. Refer to Service Programming System
(SPS) in Programming.

Go to Step 12

-

10

Replace the power mirror. Refer to Mirror
Replacement .
Did you complete the repair?

Go to Step 12

-

11

Replace the appropriate door module. Refer to
Switch Replacement - Door Lock and Side
Window - Driver or Switch Replacement - Door
Lock and Side Window - Passenger .Did you
complete the repair?

IMPORTANT:

Perform the set up procedure for the appropriate
door module. Refer to Service Programming
System (SPS) in Programming.

Go to Step 12

-

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Doors - Hummer H2

POWER MIRRORS - MEMORY FUNCTIONS INOPERATIVE

Power Mirrors - Memory Functions Inoperative

12

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

System OK

Go to Step 3

Step

Action

Value
(s)

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 Step 3

Go to Power

Mirrors

Inoperative

3

1. Install a scan tool.

2. Turn ON the ignition, with the engine

OFF.

3. Monitor the memory switch data

parameters.

Are any of the memory switch data
parameters active without a switch
activation?

-

Go to Step 5

Go to Step 4

4

1. Monitor the memory switch data

parameters.

2. Activate the memory 1, memory 2 and

Exit switches one at a time.

Do all of the memory switch data parameters
change state with the corresponding switch
activation?

-

Go to Step 7

Go to Step 6

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Doors - Hummer H2

5

Disconnect the memory switch.
Does the memory switch data parameter
change to idle?

-

Go to Step 13

Go to Step 12

6

1. Disconnect the memory switch.

2. Monitor the memory switch data

parameter.

3. Connect a 3-amp fused jumper

between the memory switch battery
positive voltage pin and each of the
memory switch signal pins, one at a
time, at the driver door module.

Does the memory switch data parameter
change state appropriately at each test point?

-

Go to Step 13

Go to Step 12

7

With a scan tool, monitor the Mirror
Horizontal and Vertical Position data
parameters of the inoperative mirror while
commanding the mirror to move with the
mirror switch.
Do the Mirror Horizontal and Vertical
Position data parameters change values with
the corresponding mirror movement?

-

Go to Step 10

Go to Step 8

8

1. Disconnect the inoperative mirror.

2. Measure the voltage between the

mirror 5-volt reference circuit pin at
the door module and a good ground.

Does the voltage measure within the
specified range?

4.75-

5.0 V

Go to Step 9

Go to Step 12

9

1. With a scan tool, monitor the Mirror

Horizontal and Vertical Position data
parameters.

2. Connect a 3-amp fused jumper

between the mirror 5-volt reference
circuit pin and each of the horizontal
and vertical position signal circuit pins
at the door module one at a time.

Do the Mirror Horizontal and Vertical
Position data parameters display within the
specified range?

4.75-

5.0 V

Go to Step 14

Go to Step 10

1. Connect the inoperative mirror.

2. Backprobe the mirror 5-volt reference

circuit with a DMM connected to a

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Doors - Hummer H2