Hummer H2. Manual — part 649

10

good ground.

3. Monitor the voltage displayed on the

DMM while commanding the mirror
to the full up, down, left and right
positions with the mirror position
switch.

Does the measured voltage display greater
than the specified value?

5.0 V

Go to Step 14

Go to Step 11

11

1. Command the mirror to move with the

mirror switch to the full up and full
left position.

2. Press and hold the memory 1 switch

until two audible tones are heard.

3. With a scan tool, monitor and record

the Mirror Horizontal and Vertical
Position data parameter voltage
values.

4. Command the mirror to move with the

mirror switch to the full down and full
right position.

5. Press and release the memory 1

switch.

Does the mirror recall to within 0.02 volts of
the stored Mirror Horizontal and Vertical
Position data parameter voltage values
recorded earlier?

Within

0.2 V

Go to Testing for

Intermittent

Conditions and Poor

Connections in

Wiring Systems

Go to Step 12

12

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 18

Go to Step 15

13

Inspect for poor connections at the memory
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 18

Go to Step 16

14

Inspect for poor connections at the
appropriate 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 18

Go to Step 17

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Doors - Hummer H2

MIRRORS - OUTSIDE AUTOMATIC DAY-NIGHT FEATURE INOPERATIVE

Mirrors - Outside Automatic Day-Night Feature Inoperative

15

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 18

-

16

Replace the memory switch. Refer to
Heated Seat Switch Replacement - Front
in Seats.
Did you complete the repair?

-

Go to Step 18

-

17

Replace the appropriate mirror. Refer to
Mirror Replacement in Seats.
Did you complete the repair?

-

Go to Step 18

-

18

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

-

System OK

Go to Step 2

Step

Action

Value

(s)

Yes

No

Schematic Reference: Outside Mirror Schematics
Connector End View Reference: Stationary Windows Connector End Views

1

Did you review the operation of the
automatic day-night feature of the driver
outside rearview mirror and perform the
necessary inspections?

-

Go to Step 2

Go to Symptoms -

Doors

2

1. Turn ON the ignition, with the engine

OFF.

2. Turn OFF the automatic day-night

feature of the inside rearview mirror.

Observe the driver outside rearview
mirror.

Does the driver outside rearview mirror
remain in a darken state?

-

Go to Step 11

Go to Step 3

1. Turn ON the automatic day-night

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Doors - Hummer H2

3

feature of the inside rearview mirror.

2. Cover the sensor on the mirror back,

facing the front window.

3. Shine a bright light into the sensor on

the mirror face, facing the rear
window.

Does the inside rearview mirror darken?

-

Go to Step 4

Go to Mirrors -

Automatic Day-

Night Inoperative in

Stationary Windows

4

While shining a bright light into the sensor
on the face of the inside rearview mirror,
observe the driver outside rearview mirror.
Does the driver outside rearview mirror
darken?

0.75-

1.5 V

Go to Testing for

Intermittent

Conditions and Poor

Connections in Wiring

Systems

Go to Step 5

5

1. Turn OFF the ignition.

2. Disconnect the harness connector of

the driver outside rearview mirror.

3. Turn ON the ignition, with the engine

OFF.

4. Turn ON the automatic day-night

feature of the inside rearview mirror.

5. Cover the sensor on the mirror back,

facing the front window.

6. Shine a bright light into the sensor on

the mirror face, facing the rear
window.

7. Measure the voltage between the

signal circuit and the low reference
circuit of the driver outside rearview
mirror element.

Is the voltage within the specified range?

0.75-

1.5 V

Go to Step 9

Go to Step 6

6

Measure the voltage between the signal
circuit of the driver outside rearview mirror
element and a good ground.
Is the voltage within the specified range?

0.75-

1.5 V

Go to Step 8

Go to Step 7

7

Test the signal circuit of the driver outside
rearview mirror element for an open or high
resistance. Refer to Circuit Testing and
Wiring Repairs in Wiring Systems.
Did you find or correct the condition?

-

Go to Step 14

Go to Step 10

8

Test the low reference circuit of the driver
outside rearview mirror element for an open
or high resistance. Refer to Circuit Testing
and Wiring Repairs in Wiring Systems.

-

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Doors - Hummer H2

HEATED MIRRORS INOPERATIVE

Heated Mirrors Inoperative

Did you find or correct the condition?

Go to Step 14

Go to Step 10

9

Inspect for poor connections at the harness
connector of the driver outside rearview
mirror. Refer to Testing for Intermittent
Conditions and Poor Connections and
Connector Repairs in Wiring Systems.
Did you find or correct the condition?

-

Go to Step 14

Go to Step 12

10

Inspect for poor connections at the harness
connector of the inside rearview mirror.
Refer to Testing for Intermittent
Conditions and Poor Connections and
Connector Repairs in Wiring Systems.
Did you find or correct the condition?

-

Go to Step 14

Go to Step 13

11

Repair the short to voltage in the signal
circuit of the driver outside rearview mirror
element. Refer to Wiring Repairs in Wiring
Systems.Did you complete the repair?

IMPORTANT:

A short to voltage in the signal circuit of
the driver outside rearview mirror element
will cause permanent damage to both the
driver outside rearview mirror element
and the inside rearview mirror.

-

Go to Step 14

-

12

Replace the driver outside rearview mirror.
Refer to Mirror Replacement .
Did you complete the replacement?

-

Go to Step 14

-

13

Replace the inside rearview mirror. Refer to
Rearview Mirror Replacement in
Stationary Windows.Did you complete the
replacement?

IMPORTANT:

Perform the setup procedure for the
inside rearview mirror with compass.
Refer to Compass Calibration and
Variance Procedure in Stationary
Windows.

-

Go to Step 14

-

14

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

-

System OK

Go to Step 2

Step

Action

Yes

No

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Doors - Hummer H2