Hummer H2. Manual - part 580

 

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Hummer H2. Manual - part 580

 

 

Heated Seat Inoperative 

Step

Action

Yes

No

Schematic Reference:Driver Seat Schematics and 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. Start the engine.  

3. Display the Heated Seat Status and Zone 

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

4. Operate the heated seat switch in all modes.  

Does the scan tool display the correct heated seat 
parameters in relation to heated seat switch 
operation?

Go to Step 8

Go to Step 4

4

1. Display the heated seat switch parameters in 

the door module Inputs data list.  

2. Press the head seat switches while observing 

the scan tool parameters.  

Does the scan tool display the heated seat switches 
as active while the switches are pressed?

Go to Step 5

Go to Step 6

5

Do the heated seat switch indicators operate 
normally?

Go to Step 13

Go to Step 12

6

1. Disconnect the heated seat switch harness 

connector to the door module.  

2. Test the resistance through the heated seat 

switch from the voltage supply circuit 
terminal to the back only select switch signal 
circuit terminal while operating the heat level 
switch.  

Does the back only select switch have continuity 
only when pressed?

Go to Step 7

Go to Step 10

Test the resistance through the heated seat switch 
from the voltage supply circuit terminal to the 
back/cushion select switch signal circuit terminal 

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Seats - Hummer H2

  

7

while operating the back/cushion select switch. 
Does the back/cushion select switch have continuity 
only when pressed?

Go to Step 12

Go to Step 10

8

1. Disconnect the inoperative seat heater element 

connector.  

2. Connect a test lamp from the voltage supply 

circuit terminal to the control circuit terminal 
in the harness connector.  

3. Operate the seat back and cushion switch to 

the high mode.  

Does the test lamp illuminate?

Go to Step 11

Go to Step 9

9

Test the seat heater element voltage supply and 
ground circuits in the seat harness 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 18

Go to Step 13

10

Inspect for poor connections at the heated seat 
switch harness connector to the door 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 18

Go to Step 14

11

Inspect for poor connections at the heated seat 
element 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 18

Go to Step 15

12

Inspect for poor connections at the door 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 18

Go to Step 16

13

Inspect for poor connections at 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 18

Go to Step 17

14

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

Go to Step 18

-

15

Replace the inoperative heated seat element. Refer 
to Seat Back Heater Element Replacement - 
Front or to Seat Cushion Heater Element 
Replacement - Front . 

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Seats - Hummer H2

  

HEATED SEAT ALWAYS ON - REAR 

Heated Seat Always On - Rear 

HEATED SEAT INOPERATIVE - REAR 

Heated Seat Inoperative - Rear 

Is the repair complete?

Go to Step 18

-

16

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 18

-

17

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

Go to Step 18

-

18

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

System OK

Go to Step 3

Step

Action

Yes

No

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

1

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

Go to Step 2

Go to 

Symptoms - 

Seats

2

Operate the rear 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

Disconnect the heated seat control module 
connector. 
Does the heated seat element still operate?

Go to Step 4

Go to Step 5

4

Repair the seat heater element supply circuit for 
a short to voltage. Refer to Circuit Testing and 
Wiring Repairs in Wiring Systems. 
Did you find and correct the condition?

Go to Step 6

-

5

Replace the heated seat control module. 
Is the repair complete?

Go to Step 6

-

6

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

System OK

Go to Step 2

Step

Action

Values

Yes

No

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

1

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

-

Go to 

Symptoms -

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Seats - Hummer H2

  

Go to Step 2

Seats

2

Operate the rear 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. Disconnect the heated seat control module 

connector.  

2. Connect a test lamp from the ignition voltage 

supply circuit terminal in the harness 
connector to ground.  

3. Turn ON the ignition.  

Does the test lamp illuminate?

-

Go to Step 4

Go to Step 

11

4

Connect a test lamp test from the battery voltage 
supply circuit terminal in the heated seat control 
module harness connector to ground. 
Does the test lamp illuminate?

-

Go to Step 5

Go to Step 

12

5

Connect a test lamp from battery voltage to the 
ground circuit terminal in the heated seat control 
module harness connector. 
Does the test lamp illuminate?

-

Go to Step 6

Go to Step 

13

6

1. Connect a test lamp from battery voltage to 

the heated seat switch signal circuit terminal 
in the heated seat control module harness 
connector.  

2. Press and release the heated seat switch.  

Does the test lamp illuminate only while the heated 
seat switch is pressed?

-

Go to Step 7

Go to Step 

14

7

Connect a fused jumper wire from battery voltage 
to the high indicator control circuit terminal in the 
heated seat control module harness connector. 
Does the heated seat switch high indicator 
illuminate?

-

Go to Step 8

Go to Step 

16

8

Connect a fused jumper wire from battery voltage 
to the low indicator control circuit terminal in the 
heated seat control module harness connector. 
Does the heated seat switch low indicator 
illuminate?

-

Go to Step 9

Go to Step 

17

9

Test the resistance through the heated seat 
thermistor from the heated seat control module 
harness connector. Refer to Circuit Testing in 
Wiring Systems. 

7K-

12K 

ohm

Go to Step 

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Seats - Hummer H2

  

 

 

 

 

 

 

 

Content   ..  578  579  580  581   ..