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