GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2002 🢒 Grand Prix 🢒 Body and Accessories 🢒 Retained Accessory Power 🢒 DTC 004

Conditions for Running the DTC
    • The battery voltage is more than 9 volts and less than 18 volts.
    • The RAP function is activated by the body control module (BCM).

Conditions for Setting the DTC
    • The BCM detects a short to B+ or ground or an open circuit in the RAP relay control circuit.
    • The circuit fault is present for at least 250 ms.

Action Taken When the DTC Sets
    • All power to the radio, power windows and sunroof is disabled if the RAP relay control circuit is shorted to B+ or open.
    • The RAP feature always stays enabled when RAP relay control circuit is shorted to ground.

Conditions for Clearing the DTC
    • A short to B+, open circuit or short to ground in the RAP relay control circuit is no longer present.
    • After the repairs are completed, refer to On-Board Diagnostic Features in Body Control System.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. Tests for voltage at the coil side of the RAP relay.

    2.

  2. Verifies that the BCM is providing ground to the RAP relay.

    3.

  3. Tests if ground is constantly being applied to the RAP relay.

Step

Action

Yes

No

Schematic Reference: Retained Accessory Power (RAP) Schematics

1

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

Go to Step 2

Go to Diagnostic System Check - Retained Accessory Power

2
  1. Open the driver's door.
  2. Turn ON the ignition, with the engine OFF.
  3. Turn ON the radio.
  4. Turn the ignition OFF.

Does the radio turn ON and OFF with each ignition switch cycle?

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

Go to Step 3

3

  1. Turn OFF the ignition.
  2. Disconnect the retained accessory power (RAP) relay.
  3. Probe both of the battery positive voltage circuits of the RAP relay with a test lamp that is connected to a good ground.

Does the test lamp illuminate on both circuits?

Go to Step 4

Go to Step 10

4

  1. Connect a test lamp between the control circuit of the RAP relay and the battery positive voltage circuit of the RAP relay.
  2. Open the driver's door.
  3. Turn the ignition ON, with the engine OFF.
  4. Turn the ignition OFF.

Does the test lamp turn ON and OFF with each ignition switch cycle?

Go to Step 8

Go to Step 5

5

Does the test lamp remain illuminated with each ignition switch cycle?

Go to Step 7

Go to Step 6

6

Test the control circuit of the RAP relay for a short to voltage or an open. 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

7

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

8

Inspect for poor connections 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

9

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 13

Go to Step 12

10

Repair the battery positive voltage circuit of the RAP relay. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 13

--

11

Replace the RAP relay.

Did you complete the replacement?

Go to Step 13

--

12

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

Did you complete the replacement?

Go to Step 13

--

13
  1. Clear the DTCs from the BCM. Refer to On-Board Diagnostic Features in Body Control System.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.

Does the DTC reset?

Go to Step 2

System OK