Power and Ground Distribution: Testing and Inspection

Retained Accessory Power (RAP) Malfunction

Diagnostic Fault Information

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

Circuit/System Description

The body control module (BCM) monitors the ignition mode signal from the ignition mode switch, battery condition and the doors status to determine whether RAP should be initiated.

Circuit/System Testing

1. While opening and closing all doors, observe the scan tool door ajar switch parameters. Parameter should switch between open and closed.

• If not the specified parameter, refer to Symptoms - Vehicle Access. Symptoms - Vehicle Access

2. With all doors closed, observe the scan tool Auxiliary parameter. Cycle the ignition key to the RUN position then back to OFF, power mode parameter should display ON, wait approximately 10 minutes, power mode parameter should display OFF.

• If not the specified parameter, replace the BCM.

Repair Instructions

Perform the Diagnostic Repair Verification Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests

Control Module References for BCM replacement, setup, and programming. Programming and Relearning