Hummer H2. Manual - part 579

 

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Hummer H2. Manual - part 579

 

 

Does the scan tool display the torso inward switch 
as active?

Go to Step 8

Go to Step 11

8

1. Observe the Torso Outward Switch parameter 

in the driver seat module Input/Output data 
list.  

2. Operate the torso outward switch.  

Does the scan tool display the torso outward switch 
as active?

Go to Step 19

Go to Step 12

9

1. Disconnect the lumbar switch connector.  

2. Connect a fused jumper wire from the battery 

voltage supply circuit terminal to the lumbar 
forward switch signal circuit terminal in the 
harness connector.  

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

Go to Step 18

Go to Step 14

10

1. Disconnect the lumbar switch connector.  

2. Connect a fused jumper wire from the battery 

voltage supply circuit terminal to the lumbar 
rearward switch signal circuit terminal in the 
harness connector.  

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

Go to Step 18

Go to Step 15

11

1. Disconnect the lumbar switch connector.  

2. Connect a fused jumper wire from the battery 

voltage supply circuit terminal to the torso 
inward switch signal circuit terminal in the 
harness connector.  

Does the scan tool display the torso inward switch 
as Active?

Go to Step 18

Go to Step 16

12

1. Disconnect the lumbar switch connector.  

2. Connect a fused jumper wire from the battery 

voltage supply circuit terminal to the torso 
outward switch signal circuit terminal in the 
harness connector.  

Does the scan tool display the torso outward switch 
as Active?

Go to Step 18

Go to Step 17

13

Test the active lumbar or torso switch signal circuit 
for a short to voltage. Refer to Circuit Testing and 

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Seats - Hummer H2

  

LUMBAR SUPPORT INOPERATIVE (PASSENGER) 

Lumbar Support Inoperative (Passenger) 

to Wiring Repairs in Wiring Systems. 
Did you find and correct the condition?

Go to Step 22

Go to Step 19

14

Test the lumbar forward 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 22

Go to Step 19

15

Test the lumbar rearward 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 22

Go to Step 19

16

Test the torso inward 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 22

Go to Step 19

17

Test the torso outward 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 22

Go to Step 19

18

Inspect for poor connections at the harness 
connector of the lumbar switch assembly. 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 22

Go to Step 20

19

Inspect for poor connections at the harness 
connector of the driver seat module. 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 22

Go to Step 21

20

Replace the lumbar switch assembly. Refer to 
Lumbar Switch Replacement . 
Did you complete the replacement?

Go to Step 22

-

21

Replace the driver seat module. Refer to Memory 
Seat Control Module Replacement . 
Did you complete the replacement?

Go to Step 22

-

22

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

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Seats - Hummer H2

  

HEATED SEAT ALWAYS ON 

Heated Seat Always On 

1

Did you review the Lumbar 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

3

1. Disconnect the inoperative lumbar or torso 

motor connector.  

2. Connect a test lamp between the motor control 

circuit terminals in the harness connector.  

3. Operate the appropriate 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 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 lumbar 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 inoperative lumbar 
or torso 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 lumbar switch. Refer to Lumbar Switch 
Replacement . 
Is the repair complete?

Go to Step 9

-

8

Replace the lumbar support/torso bolster motor 
assembly. Refer to Lumbar Replacement - Front 
Seat . 
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

Yes

No

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Seats - Hummer H2

  

HEATED SEAT INOPERATIVE 

Schematic Reference:Driver Seat Schematics , Passenger 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

Operate the heated seat system. 
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. Display the Heated Seat Status parameter in 

the driver seat module Input/Output data 
list.  

3. Start the engine.  

Does the scan tool display the Heated Seat Status 
parameter as Off?

Go to Step 6

Go to Step 4

4

Display the Heated Seat Mode parameter in the 
door module Inputs data list. 
Does the scan tool display the Heated Seat Mode 
parameter as Off?

Go to Step 6

Go to Step 5

5

1. Turn OFF the ignition.  

2. Disconnect the heated seat switch connector 

to the door module.  

3. Start the engine.  

Does the scan tool display the Heated Seat Mode 
parameter as Off?

Go to Step 7

Go to Step 8

6

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

Go to Step 9

-

7

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

Go to Step 9

-

8

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

Go to Step 9

-

9

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

System OK

Go to Step 3

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Seats - Hummer H2

  

 

 

 

 

 

 

 

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