Schematic Reference: Retained Accessory Power (RAP) Schematics

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

Go to Step 2

Go to Diagnostic System Check - Retained Accessory Power

1. Install a scan tool.
2. Close all the doors.
3. Turn ON the ignition with the engine OFF.
4. Wait 5 seconds, then turn OFF the ignition.
5. Wait 10 minutes
6. Operate the components that have voltage supplied by the retained accessory power (RAP) relay.

Do the components operate?

Go to Step 3

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Observe the Delay Acc. Bus Output parameter in the Body Control Module (BCM) data list.

Does the Delay Acc. Bus Output indicate ON?

Go to Step 10

Go to Step 4

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

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

Go to Step 8

Go to Step 5

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

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

Go to Step 8

Go to Step 6

Does the test lamp remain illuminated with each command?

Go to Step 7

Go to Step 10

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

Did you find and correct the condition?

Go to Step 13

Go to Step 9

Test the RAP controlled voltage circuit of the RAP relay 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 13

Go to Step 9

Inspect for poor connections and 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?

Go to Step 13

Go to Step 11

Inspect for poor connections and terminal tension 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 13

Go to Step 12

Replace the RAP relay.

Did you complete the replacement?

Go to Step 13

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Replace the BCM. Refer to Body Control Module Replacement in Body Control System.

Did you complete the replacement?

Go to Step 13

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 1