Hummer H2. Manual - part 576

 

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Hummer H2. Manual - part 576

 

 

Go to Step 2

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 Front Vertical Up and Down 

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

Do either of the Front Vertical Switch parameters 
display Active?

Go to Step 4

Go to Step 5

4

Disconnect the seat adjuster switch connector. 
Do both of the Front Vertical Switch parameters 
display Inactive?

Go to Step 12

Go to Step 9

5

Operate the front vertical up switch. 
Does the scan tool display the front vertical up 
switch as Active?

Go to Step 6

Go to Step 7

6

Operate the front vertical down switch. 
Does the scan tool display the front vertical down 
switch as Active?

Go to Step 13

Go to Step 8

7

1. Disconnect the seat adjuster switch 

connector.  

2. Connect a fused jumper wire from the 

battery voltage supply circuit terminal to the 
front vertical up switch signal circuit 
terminal in the harness connector.  

Does the scan tool display the front vertical up 
switch as Active?

Go to Step 12

Go to Step 10

8

1. Disconnect the seat adjuster switch 

connector.  

2. Connect a fused jumper wire from the 

battery voltage supply circuit terminal to the 
front vertical down switch signal circuit 
terminal in the harness connector.  

Does the scan tool display the front vertical down 
switch as Active?

Go to Step 12

Go to Step 11

9

Test the active front vertical switch signal circuit 
for a short to voltage. Refer to Circuit Testing and 
to Wiring Repairs in Wiring Systems. 
Did you find and correct the condition?

Go to Step 16

Go to Step 13

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Seats - Hummer H2

  

POWER SEAT DOES NOT TILT FORWARD (PASSENGER) 

Power Seat Does Not Tilt Forward (Passenger) 

10

Test the front vertical up switch signal circuit for 
an open or high resistance. Refer to Circuit 
Testing and to Wiring Repairs in Wiring 
Systems. 
Did you find and correct the condition?

Go to Step 16

Go to Step 13

11

Test the front vertical down switch signal circuit 
for an open or high resistance. Refer to Circuit 
Testing and to Wiring Repairs in Wiring 
Systems. 
Did you find and correct the condition?

Go to Step 16

Go to Step 13

12

Inspect for poor connections at the seat adjuster 
switch harness 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 16

Go to Step 14

13

Inspect for poor connections at the driver seat 
module harness 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 16

Go to Step 15

14

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

Go to Step 16

-

15

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

Go to Step 16

-

16

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

System OK

Go to Step 3

Step

Action

Yes

No

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

1

Did you review the Power Seats System Description 
and Operation and perform the necessary inspections?

Go to Step 2

Go to 

Symptoms - 

Seats

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

1. Disconnect the front vertical adjuster motor 

connector.  

2. Connect a test lamp between the front vertical 

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Seats - Hummer H2

  

POWER SEAT DOES NOT TILT REARWARD (DRIVER) 

Power Seat Does Not Tilt Rearward (Driver) 

3

motor control circuit terminals in the harness 
connector.  

3. Operate the front vertical adjuster switch in 

both directions.  

Does the test lamp illuminate when the switch is 
operated in both directions?

Go to Step 6

Go to Step 4

4

Test the front vertical motor control circuits for an 
open or short to ground. Refer to Circuit Testing and 
to Wiring Repairs in Wiring Systems. 
Did you find and correct the condition?

Go to Step 9

Go to Step 5

5

Inspect for poor connections at the seat adjuster 
switch. 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 7

6

Inspect for poor connections at the front vertical 
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 front vertical 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 2

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

1. Install a scan tool.  

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Seats - Hummer H2

  

3

2. Observe the Rear Vertical Up and Down 

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

Do either of the Rear Vertical Switch parameters 
display Active?

Go to Step 4

Go to Step 5

4

Disconnect the seat adjuster switch connector. 
Do both of the Rear Vertical Switch parameters 
display Inactive?

Go to Step 12

Go to Step 9

5

Operate the rear vertical up switch. 
Does the scan tool display the rear vertical up 
switch as Active?

Go to Step 6

Go to Step 7

6

Operate the rear vertical down switch. 
Does the scan tool display the rear vertical down 
switch as Active?

Go to Step 13

Go to Step 8

7

1. Disconnect the seat adjuster switch 

connector.  

2. Connect a fused jumper wire from the 

battery voltage supply circuit terminal to the 
rear vertical up switch signal circuit terminal 
in the harness connector.  

Does the scan tool display the rear vertical up 
switch as Active?

Go to Step 12

Go to Step 10

8

1. Disconnect the seat adjuster switch 

connector.  

2. Connect a fused jumper wire from the 

battery voltage supply circuit terminal to the 
rear vertical down switch signal circuit 
terminal in the harness connector.  

Does the scan tool display the rear vertical down 
switch as Active?

Go to Step 12

Go to Step 11

9

Test the active rear vertical switch signal circuit for 
a short to voltage. Refer to Circuit Testing and to 
Wiring Repairs in Wiring Systems. 
Did you find and correct the condition?

Go to Step 16

Go to Step 13

10

Test the rear vertical up switch signal circuit for an 
open or high resistance. Refer to Circuit Testing 
and to Wiring Repairs in Wiring Systems. 
Did you find and correct the condition?

Go to Step 16

Go to Step 13

11

Test the rear vertical down switch signal circuit for 
an open or high resistance. Refer to Circuit 
Testing and to Wiring Repairs in Wiring 

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Seats - Hummer H2

  

 

 

 

 

 

 

 

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