GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2000 🢒 LeSabre 🢒 Body and Accessories 🢒 Retained Accessory Power 🢒 Retained Accessory Power (RAP) Inoperative

Step

Action

Value(s)

Yes

No

1

Did you perform the Retained Accessory Power (RAP) Diagnostic System Check?

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Go to Step 2

Go to Diagnostic System Check - Retained Accessory Power

2
  1. Install a scan tool.
  2. Close all of the doors.
  3. Turn ON the ignition, with the engine OFF.
  4. Wait 5 seconds, then turn OFF the ignition.
  5. Observe the dash integration module (DIM) ignition switch status.

Does the ignition switch status indicate RAP?

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Go to Step 3

Go to DTC B1422 Device Power Moding Malfunction

3

Observe the RAP Output parameters in the rear integration module (RIM) data list.

Does the RAP Output indicate ON?

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Go to Step 4

Go to Step 11

4
  1. Turn ON the ignition, with the engine OFF.
  2. Using the scan tool, command the RAP relay ON and OFF.

Does the RAP relay turn ON and OFF with each command?

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Go to Step 8

Go to Step 5

5
  1. Turn OFF the ignition.
  2. Disconnect the RAP relay.
  3. Turn ON the ignition, with the engine OFF.
  4. Probe the coil side feed circuit of the RAP relay with a test lamp that is connected to a good ground.

Does the test lamp illuminate?

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Go to Step 6

Go to Step 12

6
  1. Connect a test lamp between the control circuit of the RAP relay and the coil side feed circuit of the RAP relay.
  2. Using the scan tool, command the RAP relay ON and OFF.

Does the test lamp turn ON and OFF with each command?

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Go to Step 8

Go to Step 7

7

Test the control circuit of the RAP relay for a open or a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 15

Go to Step 11

8

Test the load output circuit of the RAP relay for open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 15

Go to Step 9

9

Test the load input circuit of the RAP relay for open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 15

Go to Step 10

10

Inspect for poor connections/terminal tension at the RAP relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 15

Go to Step 13

11

Inspect for poor connections/terminal tension at the harness connector of the RIM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 15

Go to Step 14

12

Repair the coil side feed circuit of the RAP relay. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

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Go to Step 15

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13

Replace the RAP relay.

Did you complete the replacement?

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Go to Step 15

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14

Replace the RIM. Refer to Rear Integration Body Control Module Replacement in Body Control System.

Did you complete the replacement?

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Go to Step 15

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15

Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 1