DTC 004

SYSTEM DESCRIPTION
The body control module (BCM) controls the retained accessory power (RAP) feature.

The RAP feature allows the following components to operate after the ignition switch is turned from the RUN position to the OFF/UNLOCK position:
- The radio
- The power windows
- The power sunroof

The RAP feature allows the components to operate for 10 minutes, or until a door is opened.

The BCM interfaces with the vehicles power distribution through the RAP relay.

When the ignition switch is in either the ACC position or the RUN position, the BCM energizes the RAP relay by grounding the relay control circuit. The BCM turns off the RAP relay when the ignition switch is in the START position. This disables the RAP feature during the engine crank and the bulb test.

When the ignition switch is turned from the RUN position to the OFF/UNLOCK position, the BCM leaves the RAP relay energized for 10 minutes or until one or more of the following conditions exist:
- Any of the vehicle doors open.
- The content theft deterrent system goes into an armed mode.

The BCM resets the RAP feature when the ignition switch is turned from the OFF/UNLOCK position to the ACC position.

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 Module. Testing and Inspection

TEST DESCRIPTION

Steps 1-5:

Steps 6-13:

The numbers below refer to the step numbers on the diagnostic table.
3. Tests for voltage at the coil side of the RAP relay.
4. Verifies that the BCM is providing ground to the RAP relay.
5. Tests if ground is constantly being applied to the RAP relay.