Retained Accessory Power (RAP) On After Timeout. Buick LaCrosse 2007

For 1990-2009 cars only

Makes 🢒 Buick 🢒 2007 🢒 LaCrosse 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Retained Accessory Power (RAP) On After Timeout

Diagnostic Aids

This table is used for all retained accessory power (RAP) relay and RAP serial data controlled accessories which remain active after RAP has timed out. The RAP relay system can malfunction separately from the serial data controlled RAP system and the serial data controlled RAP system can malfunction separately from the RAP relay. If multiple accessories are not exhibiting an "On After Time-out" symptom, either on the RAP relay controlled circuit or the serial data controlled circuit or both, the malfunction is in a particular device and not in the RAP control system. Refer to Control Module References to locate information on a specific system.

Step	Action	Yes	No
Schematic Reference: Power Distribution Schematics Connector End View Reference: Master Electrical Component List This table will diagnose accessories that are controlled by the retained accessory power (RAP) system and will not power down after the RAP system has commanded them to enter the OFF power mode.
1	Did you perform the Diagnostic System Check - Vehicle?	Go to Step 2	Go to Diagnostic System Check - Vehicle
2	Close all of the doors on the vehicle. With a scan tool, observe the state of all the door jamb switches. With the doors closed the scan tool should display Inactive, Off or Closed. Open each door one at a time and observe the all the switch states on a scan tool when a door is open. The scan tool should display Active, On or open. Close each door after each observation is complete. Does the data displayed on the scan tool correlate with an open or closed state?	Go to Step 3	Go to Symptoms - Lighting Systems
3	Important: Refer to Retained Accessory Power (RAP) Description and Operation for a list of accessories that are controlled by the retained accessory power (RAP) system and how the RAP system controls them. Do only the devices powered by the RAP relay exhibit this symptom?	Go to Step 5	Go to Step 4
4	Install a scan tool. Select body control module (BCM) data in data display. Close all the doors. Turn ON the ignition, with the engine OFF. Wait 5 seconds, then turn the ignition OFF. Wait for the RAP time-out. Does the scan tool display the RAP/Rap Unlock power mode for Twenty minutes then time-out and display Off-Awake or the OFF power mode?	Go to Diagnostic Aids	Go to Step 9
5	Turn the ignition switch to the LOCK position. Disconnect the RAP relay. Open the driver door. Attempt to operate the power windows. Attempt to operate the sunroof if equipped. Do the power windows or sunroof operate?	Go to Step 6	Go to Step 7
6	Repair the short to battery positive voltage in the RAP relay output circuit . Refer to Wiring Repairs. Did you complete the repair?	Go to Step 11	--
7	Using a test lamp, probe the RAP relay control circuit at the RAP relay socket. Does the test lamp illuminate?	Go to Step 9	Go to Step 8
8	Replace the RAP relay. Did you complete the replacement?	Go to Step 11	--
9	Check for lose connections and the proper terminal tension at the BCM harness connectors. Did you find and correct the condition?	Go to Step 11	Go to Step 10
10	Important: Perform the setup procedure for the new BCM. Refer to Control Module References . Replace the BCM. Refer to Control Module References . Did you complete the replacement?	Go to Step 11	--
11	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 2