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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 31 (Wiring Systems And Power Management) >> Diagnostic Information and Procedures >> Retained Accessory Power (RAP) Inoperative

Retained Accessory Power (RAP) Inoperative

WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
Retained Accessory Power (RAP) Inoperative

Step Action Yes No
Schematic Reference: Power Moding Schematics 
Connector End View Reference: Master Electrical Component List 
1 Did you perform the Diagnostic System Check - Vehicle? Go to Step 2  Go to Diagnostic System Check - Vehicle
2 Does only sunroof exhibit this symptom? Go to Step 5  Go to Step 3 
3
  1. Observe the following parameters in DDM, FPDM and BCM data list:
    • Door Ajar Switch
    • Left Rear/Rear Cargo Door Ajar Switch
    • Right Rear Door Ajar Sw.
  2. Open and close each door while observing the respective parameter.
Does the scan tool display change from On to Off?		 Go to Step 4  Go to Symptoms - Lighting Systems
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 .
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.
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 .
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 .
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 .
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 body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections  and Connector Repairs .
Did you find and correct the condition?		 Go to Step 17  Go to Step 16 
16 Replace the BCM. Refer to Control Module References for replacement, setup, and programming.
Did you complete the procedure?		 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 
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