Retained Accessory Power (RAP) Malfunction

RETAINED ACCESSORY POWER (RAP) MALFUNCTION

DIAGNOSTIC FAULT INFORMATION
Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview

CIRCUIT/SYSTEM DESCRIPTION
The body control module (BCM) is the power mode master and will monitor the status of the ignition switch and the doors. When necessary conditions are met, the BCM provides battery voltage to specific components for a predetermined amount of time. This is known as the retained accessory power (RAP) mode. The RAP mode will provide battery voltage to the sunroof module (if equipped) or the special equipment option (SEO) RAP relay (if equipped). For components such as the radio and driver door module (DDM), each will receive a message broadcasted on the communication buss requesting to remain powered ON in support of RAP mode.

DIAGNOSTIC AIDS
- A short to ground on the RAP mode control circuit from the BCM will set DTC B1475.
- Short to voltage in the BCM RAP mode control circuit will cause the sunroof/SEO RAP relay to operate when the RAP feature is disabled.
- An open/high resistance in the BCM RAP mode control circuit will cause the sunroof and/or SEO RAP relay to not operate when the RAP feature is enabled.
- The fused battery feed circuit for the load side SEO RAP relay may be labeled as EAP fuse in the underhood fuse block.
- The SEO RAP relay is permanently soldered to the junction block-left I/P and is non-serviceable.

CIRCUIT/SYSTEM VERIFICATION
1. Sit in the driver seat. With the ignition ON, verify all doors are closed and that the RAP feature is enabled via Driver Information Center. Refer to Owners Manual.
2. With the ignition ON, lower the driver door window. Ignition OFF, remove the key from the ignition switch.
3. Operate the radio, driver side power window and the sunroof, if equipped
4. Open the driver door. The radio, power window and sunroof should not be operational.

CIRCUIT/SYSTEM TESTING
RAP Malfunction - Except Sunroof or SEO RAP Function
1. Ignition ON, with the scan tool, check for and diagnose any current DTC.
2. Perform system verification. Verify that the radio and DDM RAP mode is inoperative or always ON.
- If for both components the RAP modes are inoperative or always ON, then replace the BCM. Refer to repair instructions.
- If one of the components the RAP mode is inoperative or always ON, replace the component. Refer to repair instructions.

RAP Malfunction - Sunroof
1. If the sunroof RAP mode is malfunctioning, enable RAP mode and test for RAP mode control circuit voltage (12 volts) at the sunroof module.
- If voltage is present repair/replace the sunroof module.
2. If voltage is not present, test for an open/high resistance in the RAP mode control circuit.
- If a condition is found make the appropriate repair.
- If the circuit tests normal, then replace the BCM.

RAP Malfunction - SEO RAP Relay
1. Test for voltage at the SEO RAP relay. enable the RAP mode and test both the RAP mode control circuit and the battery supply circuit for voltage.
- If voltage is present repair/replace the junction block- left I/P.
2. If voltage is not present, test for an open/high resistance in the sunroof-RAP control circuit and/or the battery feed circuit. Verify that the EAP fuse in the underhood fuse block is not open.
- If a condition is found make the appropriate repair.
- If the RAP mode control circuit tests normal and battery voltage on the load side of the relay is present, replace the BCM.

REPAIR INSTRUCTIONS
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
- Instrument Panel Electrical Center or Junction Block Replacement - Left Side
- Underhood Electrical Center or Junction Block Replacement
- Control Module References for BCM, DDM, Radio and Sunroof Control Module replacement, setup, and programming. Verification Tests Programming and Relearning