Hummer H2. Manual - part 649

 

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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

  

 

 

 

 

 

 

 

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