Section 621 (Retained Accessory Power System)
WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Schematic & Routing Diagrams
- Diagnostic Information & Procedures
- Diagnostic Starting Point - Retained Accessory Power
- Diagnostic System Check - Retained Accessory Power
- Scan Tool Output Controls
- Scan Tool Data List
- Scan Tool Data Definitions
- Diagnostic Trouble Code (DTC) List
- DTC B1477: No Voltage At RAP#1 Relay Control Circuit
- DTC B1478: Short To Battery In The RAP#1 Relay Control Circuit
- Symptoms - Retained Accessory Power
- Retained Accessory Power (RAP) On After Timeout
- Retained Accessory Power (RAP) Inoperative
- Description & Operation