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