Hummer H2. Manual - part 578

MEMORY SEAT FEATURE INOPERATIVE 

Memory Seat Feature Inoperative 

Did you find and correct the condition?

Go to Step 9

Go to Step 7

6

Inspect for poor connections at the recline adjuster 
motor. Refer to Testing for Intermittent Conditions 
and Poor Connections and to Connector Repairs in 
Wiring Systems. 
Did you find and correct the condition?

Go to Step 9

Go to Step 8

7

Replace the seat adjuster switch. Refer to Seat 
Switch Replacement - Power . 
Is the repair complete?

Go to Step 9

-

8

Replace the recline adjuster motor. Refer to Seat 
Adjuster Motor Replacement - Front . 
Is the repair complete?

Go to Step 9

-

9

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

System OK

Go to Step 3

Step

Action

Values

Yes

No

Schematic Reference:Driver Seat Schematics 
Connector End View Reference:Power Seat Systems Connector End Views 
DEFINITION: One or more of the memory recall functions are inoperative.

1

Did you perform the Power Seat Diagnostic 
System Check?

-

Go to Step 2

Go to 

Diagnostic 

System Check - 

Power Seat 

Systems

2

Attempt to set and recall memory 1, memory 2, 
and exit seat position settings. 
Does the system operate normally?

-

Go to Testing for 

Intermittent 

Conditions and Poor 

Connections in 

Wiring Systems

Go to Step 3

3

1. Install a scan tool.  

2. Observe the Memory Switch parameter in 

the driver door module Inputs data list.  

3. Press the memory 1 switch.  

Does the scan tool display the memory 1 switch 
as Active only while the switch is pressed?

-

Go to Step 4

Go to Step 6

4

1. Observe the Memory Switch parameter in 

the driver door module Inputs data list.  

2. Press the memory 2 switch.  

Does the scan tool display the memory 2 switch 

-

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Seats - Hummer H2

  

as Active only while the switch is pressed?

Go to Step 5

Go to Step 7

5

1. Observe the Memory Switch parameter in 

the driver door module Inputs data list.  

2. Press the EXIT switch.  

Does the scan tool display the EXIT switch as 
Active only while the switch is pressed?

-

Go to Step 12

Go to Step 8

6

1. Disconnect the memory switch connector 

from the driver door module.  

2. Using a DMM test the resistance through 

the memory switch from the switch supply 
voltage circuit terminal to the memory 1 
switch signal circuit terminal in the pigtail 
connector. Refer to Circuit Testing and to 
Wiring Repairs in Wiring Systems.  

3. Press the memory 1 switch.  

Is the resistance less than the specified value 
only while the switch is pressed?

0.5 

ohm

Go to Step 13

Go to Step 11

7

1. Disconnect the memory switch connector 

from the driver door module.  

2. Using a DMM test the resistance through 

the memory switch from the switch supply 
voltage circuit terminal to the memory 2 
switch signal circuit terminal in the pigtail 
connector. Refer to Circuit Testing and to 
Wiring Repairs in Wiring Systems.  

3. Press the memory 2 switch.  

Is the resistance less than the specified value 
only while the switch is pressed?

0.5 

ohm

Go to Step 13

Go to Step 11

8

1. Disconnect the memory switch connector 

from the driver door module.  

2. Using a DMM test the resistance through 

the memory switch from the switch supply 
voltage circuit terminal to the memory 1 
switch signal circuit terminal in the pigtail 
connector. Refer to Circuit Testing and to 
Wiring Repairs in Wiring Systems.  

3. Press the EXIT switch.  

Is the resistance less than the specified value?

0.5 

ohm

Go to Step 9

Go to Step 11

1. Using a DMM test the resistance through 

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Seats - Hummer H2

  

9

the memory switch from the switch supply 
voltage circuit terminal to the memory 2 
switch signal circuit terminal in the pigtail 
connector. Refer to Circuit Testing and to 
Wiring Repairs in Wiring Systems.  

2. Press the EXIT switch.  

Is the resistance less than the specified value 
only while the switch is pressed?

0.5 

ohm

Go to Step 10

Go to Step 11

10

Test the memory switch signal circuits in the 
switch harness for a short to ground or voltage. 
Refer to Circuit Testing in Wiring Systems. 
Are either of the switch signal circuits shorted to 
ground or voltage?

-

Go to Step 14

Go to Step 13

11

Inspect for poor connections at the memory 
switch connector. Refer to Testing for 
Intermittent Conditions and Poor 
Connections and to Connector Repairs in 
Wiring Systems. 
Did you find and correct the condition?

-

Go to Step 17

Go to Step 14

12

Inspect for poor connections at the driver seat 
module connectors. Refer to Testing for 
Intermittent Conditions and Poor 
Connections and to Connector Repairs in 
Wiring Systems. 
Did you find and correct the condition?

-

Go to Step 17

Go to Step 15

13

Inspect for poor connections at the driver door 
module connector. Refer to Testing for 
Intermittent Conditions and Poor 
Connections and to Connector Repairs in 
Wiring Systems. 
Did you find and correct the condition?

-

Go to Step 17

Go to Step 16

or 

14

Replace the memory switch. Refer to Heated 
Seat Switch Replacement - Front . 
Is the repair complete?

-

Go to Step 17

-

15

Replace the driver seat module. Refer to 
Memory Seat Control Module Replacement .
Is the repair complete?

-

Go to Step 17

-

16

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

-

Go to Step 17

-

17

Operate the memory seat system to verify the 
repair. 
Did you correct the condition?

-

System OK

Go to Step 3

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Seats - Hummer H2

  

LUMBAR SUPPORT INOPERATIVE (DRIVER)

Lumbar Support Inoperative (Driver) 

Step

Action

Yes

No

Schematic Reference:Driver Seat Schematics 
Connector End View Reference:Power Seat Systems Connector End Views

1

Did you perform the Power Seat Diagnostic System 
Check?

Go to Step 2

Go to Diagnostic 

System Check - 

Power Seat 

Systems

2

Verify the fault is present. 
Does the system operate normally?

Go to Testing for 

Intermittent Conditions 

and Poor Connections in 

Wiring Systems

Go to Step 3

3

1. Install a scan tool.  

2. Observe the Lumbar and Torso Switch 

parameters in the driver seat module 
Input/Output data list.  

Do any of the Lumbar or Torso Switch parameters 
display Active?

Go to Step 4

Go to Step 5

4

Disconnect the lumbar adjuster switch connector. 
Do all of the Lumbar or Torso Switch parameters 
display Inactive?

Go to Step 18

Go to Step 13

5

1. Observe the Lumbar Forward Switch 

parameter in the driver seat module 
Input/Output data list.  

2. Operate the lumbar forward switch.  

Does the scan tool display the lumbar forward 
switch as active?

Go to Step 6

Go to Step 9

6

1. Observe the Lumbar Rearward Switch 

parameter in the driver seat module 
Input/Output data list.  

2. Operate the lumbar rearward switch.  

Does the scan tool display the lumbar rearward 
switch as active?

Go to Step 7

Go to Step 10

7

1. Observe the Torso Inward Switch parameter 

in the driver seat module Input/Output data 
list.  

2. Operate the torso inward switch.  

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Seats - Hummer H2