Hummer H2. Manual - part 207

 

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Hummer H2. Manual - part 207

 

 

z

Inspect for aftermarket devices which could affect the operation of the RAP feature. Refer to Checking 
Aftermarket Accessories in Wiring Systems.  

z

Inspect the easily accessible or visible system components for obvious damage or conditions which could 
cause the symptom.  

Intermittent 

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for 
Intermittent Conditions and Poor Connections in Wiring Systems. 

Symptom List 

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom: 

z

Retained Accessory Power (RAP) On After Timeout  

z

Retained Accessory Power (RAP) Inoperative  

RETAINED ACCESSORY POWER (RAP) ON AFTER TIMEOUT 

Retained Accessory Power (RAP) On After Timeout 

Step

Action

Yes

No

Schematic Reference:Retained Accessory Power (RAP) Schematics 
Connector End View Reference: Master Electrical Component List in Wiring Systems

1

Did you perform the Diagnostic System Check - Retained 
Accessory Power?

Go to 

Step 2

Go to Diagnostic 

Starting Point - 

Retained Accessory 

Power

2

Does only sunroof exhibit this symptom?

Go to 

Step 4

Go to Step 3

3

1. Install a scan tool. Select diagnostic circuit check and 

then class 2 power mode.  

2. Close all the doors.  

3. Turn ON the ignition, with the engine OFF.  

4. Wait 5 seconds then turn the ignition OFF.  

5. Wait the time-out for RAP.  

Did the scan tool display the RAP power mode, then time-out 
and display Off-Awake power mode?

Go to 

Step 4

Go to Step 10

4

1. Turn the ignition switch to the OFF position.  

2. Disconnect the sunroof relay.  

Does the sunroof operate?

Go to 

Step 5

Go to Step 6

Repair the short to battery in the sunroof supply voltage 

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Retained Accessory Power - Hummer H2

  

RETAINED ACCESSORY POWER (RAP) INOPERATIVE 

Retained Accessory Power (RAP) Inoperative 

5

circuit. Refer to Wiring Repairs in Wiring Systems. 
Did you complete the repair?

Go to 

Step 12

-

6

1. Open the driver door.  

2. Connect a test lamp across the relay coil circuits of the 

sunroof relay.  

3. Turn ON the ignition, with the engine OFF.  

4. Turn OFF the ignition.  

Does the test lamp illuminate?

Go to 

Step 7

Go to Step 8

7

Test the RAP supply voltage circuit for a short to B+. 
Turn the ignition ON, with the engine OFF, when testing 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 12

Go to Step 10

8

Inspect for poor connections at the sunroof relay. 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 12

Go to Step 9

9

Replace the sunroof relay. 
Did you complete the replacement?

Go to 

Step 12

-

10

Inspect for poor connections at the harness connector of the 
BCM. Refer to Testing for Intermittent Conditions and 
Poor Connections and Connector Repairs in Wiring 
Systems. 
Did you find and correct the condition?

Go to 

Step 12

Go to Step 11

11

Replace the BCM. Refer to Control Module References in 
Body Control System.Did you complete the procedure?

IMPORTANT:

Perform the module setup procedure if required.

Go to 

Step 12

-

12

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

System 

OK

Go to Step 2

Step

Action

Yes

No

Schematic Reference:Retained Accessory Power (RAP) Schematics 
Connector End View Reference: Master Electrical Component List in Wiring Systems

1

Did you perform the Diagnostic System Check - 
Retained Accessory Power?

Go to Step 2

Go to Diagnostic 

System Check - 

Retained Accessory 

Power

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Retained Accessory Power - Hummer H2

  

2

1. Close all of the doors.  

2. Turn ON the ignition, with the engine 

OFF.  

3. Turn OFF the ignition.  

Do all the retained accessory power functions 
operate during the RAP time?

Go to Testing for 

Intermittent Conditions 

and Poor Connections in 

Wiring Systems

Go to Step 3

3

Does only sunroof exhibit this symptom?

Go to Step 5

Go to Step 4

4

1. Install a scan tool. Select diagnostic circuit 

check and then class 2 power mode.  

2. Close all of the doors.  

3. Turn ON the ignition, with the engine 

OFF.  

4. Wait 5 seconds then turn the ignition OFF. 

5. Wait the time-out for RAP.  

Did the scan tool display the RAP power mode 
then time-out, and display Off-Awake power 
mode?

Go to Step 5

Go to Step 15

5

1. Turn OFF the ignition.  

2. Disconnect the sunroof relay.  

3. Turn ON the ignition, with the engine 

OFF.  

4. With a test lamp that is connected to a 

good ground, probe the battery positive 
voltage circuit of the sunroof relay.  

Does the test lamp illuminate?

Go to Step 6

Go to Step 12

6

1. Connect a test lamp between the relay coil 

circuits of the sunroof relay.  

2. Turn the ignition ON, with the engine 

OFF.  

Does the test lamp illuminate?

Go to Step 9

Go to Step 7

7

Test the RAP supply voltage circuit for a short to 
ground or an open. 
Turn the ignition ON, with the engine OFF, 
when testing 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 17

Go to Step 8

8

Test the sunroof relay ground circuit for an open.

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Retained Accessory Power - Hummer H2

  

DESCRIPTION AND OPERATION

Did you find and correct the condition?

Go to Step 17

Go to Step 15

9

1. Connect a fused wire jumper across the 

relay switched circuits of the sunroof 
relay.  

2. Turn the ignition ON, with the engine 

OFF.  

3. Attempt to operate the sunroof.  

Does the sunroof operate normally?

Go to Step 11

Go to Step 10

10

Repair the sunroof relay switch output circuit. 
Refer to Wiring Repairs in Wiring Systems. 
Did you complete the replacement?

Go to Step 17

-

11

Inspect for poor connections at the sunroof relay. 
Refer to Testing for Intermittent Conditions 
and Poor Connections and Connector Repairs 
in Wiring Systems. 
Did you find and correct the condition?

Go to Step 17

Go to Step 14

12

Test the sunroof supply voltage circuit for a short 
to ground. 
Did you find and correct the condition?

Go to Step 17

Go to Step 13

13

Repair the battery positive voltage circuit of the 
sunroof relay. Refer to Wiring Repairs in 
Wiring Systems. 
Did you complete the repair?

Go to Step 17

-

14

Replace the sunroof relay. 
Did you complete the replacement?

Go to Step 17

-

15

Inspect for poor connections at the harness 
connector of the BCM. Refer to Testing for 
Intermittent Conditions and Poor 
Connections and Connector Repairs in Wiring 
Systems. 
Did you find and correct the condition?

Go to Step 17

Go to Step 16

16

Replace the BCM. Refer to Control Module 
References in Body Control System.Did you 
complete the procedure?

IMPORTANT:

Perform the module setup procedure if 
required.

Go to Step 17

-

17

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 Retained Accessory Power - Hummer H2

  

 

 

 

 

 

 

 

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