GM Service Manual Online
For 1990-2009 cars only

Diagnostic Instructions

    • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    • Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    •  Diagnostic Procedure Instructions provides an overview of each diagnostic category.

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

RAP fuse supply voltage

B1475

1

1

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1. Retained Accessory Power (RAP) Malfunction

Circuit/System Description

The BCM controlled RAP is a switch controlled voltage supply from the BCM. Power is provided for approximately 10 minutes after shutting the ignition OFF and removing the key, providing no door is opened. The RAP fuse supply voltage circuit is energized when any of the following conditions are true:

    • Ignition Switch is in ACC or ON.
    • The vehicle was remote started.
    • The vehicle is in RAP power mode.

Reference Information

Schematic Reference

    •  Power Distribution Schematics
    •  Power Moding Schematics

Connector End View Reference

Master Electrical Component List

Description and Operation

Retained Accessory Power (RAP) Description and Operation

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

Circuit/System Testing

  1. Ignition OFF, Disconnect the BCM C5 harness connector.
  2. Ignition OFF, connect a test lamp between the RAP fuse supply voltage circuit terminal 11 and ground.
  3. Ignition OFF, RAP power mode active, verify the test lamp illuminates.
  4. If the test lamp remains OFF, test the circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
  5. Ignition OFF, RAP power mode inactive, verify the test lamp does not illuminate.
  6. If the test lamp remains ON, replace the BCM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for body control module replacement, setup, and programming