Code
U3005
Generic
U — Network/User
Retained Accessory Power
Views:
UK: 16
EN: 23
RU: 20
AI status
Completed
Completed
100%
Causes
- Faulty or misprogrammed Body Control Module (BCM)
- Stuck or welded RAP/Accessory relay
- Faulty ignition switch or key position sensor
- Short or open in wiring between BCM, relay, or accessory circuits
- Blown fuse or poor fuse/relay connection
- Loss of CAN/bus communication to other modules controlling RAP
Symptoms
- Accessories (radio, windows, interior lights) remain powered after ignition OFF
- Accessories fail to remain powered when RAP should be active
- Parasitic battery drain resulting in a dead battery
- Interior lights or modules not turning off or not entering sleep
- Related warning lights or multiple body module communication errors
What to check
- Retrieve freeze frame and full DTC history with a scan tool; note conditions when U3005 set
- Check battery voltage and condition; verify proper battery state during tests
- Visually inspect fuses and RAP/accessory relay; verify seating and contacts
- Verify BCM power and ground circuits for corrosion, loose connections, or damage
- Command RAP on/off with a scan tool and observe BCM status and outputs
- Check scan tool for related CAN/bus communication DTCs and module presence
Signal parameters
- Battery voltage at BCM and at accessory relay
- Ignition/key position input (ACC/Run/Off) to BCM
- RAP enable request signal from ignition or body module
- BCM RAP relay driver output (voltage, switched ground, or control signal)
- CAN bus messages for RAP state and BCM status
- Door closed/door open signals (some RAP logic depends on door status)
Diagnostic algorithm
- Read U3005 and any related codes; record freeze frame and module uptime.
- Verify battery voltage (12.6V+ recommended). Charge battery if low and clear codes; see if code returns.
- Inspect fuses, RAP/accessory relay, and relay socket. Swap known-good relay if available and retest.
- Using a scan tool, command RAP on/off and observe whether BCM toggles outputs and whether accessories respond.
- Monitor BCM outputs with a multimeter/oscilloscope while commanding RAP; check for stuck relay driver or continuous voltage when OFF.
- Check ignition/key position input and related sensors for correct states during RAP requests.
- Inspect and test wiring between BCM, relay, and accessory circuits for shorts to battery or opens. Wiggle test harnesses while monitoring.
- Check CAN bus integrity and other module communication. Repair any bus problems and reprogram BCM if required.
- If wiring and relays test good and communications are OK, consider BCM replacement or reflashing per OEM procedure.
- After repairs, clear codes and perform battery drain/sleep checks to confirm RAP behaves correctly and code does not return.
Likely causes
- BCM software error or failed BCM
- Stuck accessory/RAP relay or relay driver inside BCM
- Wiring short to battery or chafed harness causing latch-on
- Faulty ignition switch or key position sensor
- Poor ground or low battery causing spurious RAP behavior
Fault status
Status
U3005 — Retained Accessory Power: The Body Control Module has detected an abnormal condition with the retained accessory power function (RAP). Fault may indicate RAP outputs stuck on/off, relay or driver failure, wiring fault, or communication/configuration mismatch. Inspect BCM, relay, wiring, and CAN communications.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Workshop ManualYour experience will help others
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Code
U3005
HYUNDAI
U — Network/User
Retained Accessory Power
Views:
UK: 12
EN: 18
RU: 15
AI status
Completed
Completed
100%
Causes
- Faulty or misprogrammed Body Control Module (BCM)
- Stuck or welded RAP/Accessory relay
- Faulty ignition switch or key position sensor
- Short or open in wiring between BCM, relay, or accessory circuits
- Blown fuse or poor fuse/relay connection
- Loss of CAN/bus communication to other modules controlling RAP
Symptoms
- Accessories (radio, windows, interior lights) remain powered after ignition OFF
- Accessories fail to remain powered when RAP should be active
- Parasitic battery drain resulting in a dead battery
- Interior lights or modules not turning off or not entering sleep
- Related warning lights or multiple body module communication errors
What to check
- Retrieve freeze frame and full DTC history with a scan tool; note conditions when U3005 set
- Check battery voltage and condition; verify proper battery state during tests
- Visually inspect fuses and RAP/accessory relay; verify seating and contacts
- Verify BCM power and ground circuits for corrosion, loose connections, or damage
- Command RAP on/off with a scan tool and observe BCM status and outputs
- Check scan tool for related CAN/bus communication DTCs and module presence
Signal parameters
- Battery voltage at BCM and at accessory relay
- Ignition/key position input (ACC/Run/Off) to BCM
- RAP enable request signal from ignition or body module
- BCM RAP relay driver output (voltage, switched ground, or control signal)
- CAN bus messages for RAP state and BCM status
- Door closed/door open signals (some RAP logic depends on door status)
Diagnostic algorithm
- Read U3005 and any related codes; record freeze frame and module uptime.
- Verify battery voltage (12.6V+ recommended). Charge battery if low and clear codes; see if code returns.
- Inspect fuses, RAP/accessory relay, and relay socket. Swap known-good relay if available and retest.
- Using a scan tool, command RAP on/off and observe whether BCM toggles outputs and whether accessories respond.
- Monitor BCM outputs with a multimeter/oscilloscope while commanding RAP; check for stuck relay driver or continuous voltage when OFF.
- Check ignition/key position input and related sensors for correct states during RAP requests.
- Inspect and test wiring between BCM, relay, and accessory circuits for shorts to battery or opens. Wiggle test harnesses while monitoring.
- Check CAN bus integrity and other module communication. Repair any bus problems and reprogram BCM if required.
- If wiring and relays test good and communications are OK, consider BCM replacement or reflashing per OEM procedure.
- After repairs, clear codes and perform battery drain/sleep checks to confirm RAP behaves correctly and code does not return.
Likely causes
- BCM software error or failed BCM
- Stuck accessory/RAP relay or relay driver inside BCM
- Wiring short to battery or chafed harness causing latch-on
- Faulty ignition switch or key position sensor
- Poor ground or low battery causing spurious RAP behavior
Fault status
Status
U3005 — Retained Accessory Power: The Body Control Module has detected an abnormal condition with the retained accessory power function (RAP). Fault may indicate RAP outputs stuck on/off, relay or driver failure, wiring fault, or communication/configuration mismatch. Inspect BCM, relay, wiring, and CAN communications.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Your experience will help others
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Code
U3005
LAND ROVER
U — Network/User
Retained auxiliary power
Views:
UK: 7
EN: 11
RU: 8
AI status
Completed
Completed
100%
Causes
- Faulty or misprogrammed Body Control Module (BCM)
- Stuck or welded RAP/Accessory relay
- Faulty ignition switch or key position sensor
- Short or open in wiring between BCM, relay, or accessory circuits
- Blown fuse or poor fuse/relay connection
- Loss of CAN/bus communication to other modules controlling RAP
Symptoms
- Accessories (radio, windows, interior lights) remain powered after ignition OFF
- Accessories fail to remain powered when RAP should be active
- Parasitic battery drain resulting in a dead battery
- Interior lights or modules not turning off or not entering sleep
- Related warning lights or multiple body module communication errors
What to check
- Retrieve freeze frame and full DTC history with a scan tool; note conditions when U3005 set
- Check battery voltage and condition; verify proper battery state during tests
- Visually inspect fuses and RAP/accessory relay; verify seating and contacts
- Verify BCM power and ground circuits for corrosion, loose connections, or damage
- Command RAP on/off with a scan tool and observe BCM status and outputs
- Check scan tool for related CAN/bus communication DTCs and module presence
Signal parameters
- Battery voltage at BCM and at accessory relay
- Ignition/key position input (ACC/Run/Off) to BCM
- RAP enable request signal from ignition or body module
- BCM RAP relay driver output (voltage, switched ground, or control signal)
- CAN bus messages for RAP state and BCM status
- Door closed/door open signals (some RAP logic depends on door status)
Diagnostic algorithm
- Read U3005 and any related codes; record freeze frame and module uptime.
- Verify battery voltage (12.6V+ recommended). Charge battery if low and clear codes; see if code returns.
- Inspect fuses, RAP/accessory relay, and relay socket. Swap known-good relay if available and retest.
- Using a scan tool, command RAP on/off and observe whether BCM toggles outputs and whether accessories respond.
- Monitor BCM outputs with a multimeter/oscilloscope while commanding RAP; check for stuck relay driver or continuous voltage when OFF.
- Check ignition/key position input and related sensors for correct states during RAP requests.
- Inspect and test wiring between BCM, relay, and accessory circuits for shorts to battery or opens. Wiggle test harnesses while monitoring.
- Check CAN bus integrity and other module communication. Repair any bus problems and reprogram BCM if required.
- If wiring and relays test good and communications are OK, consider BCM replacement or reflashing per OEM procedure.
- After repairs, clear codes and perform battery drain/sleep checks to confirm RAP behaves correctly and code does not return.
Likely causes
- BCM software error or failed BCM
- Stuck accessory/RAP relay or relay driver inside BCM
- Wiring short to battery or chafed harness causing latch-on
- Faulty ignition switch or key position sensor
- Poor ground or low battery causing spurious RAP behavior
Fault status
Status
U3005 — Retained Accessory Power: The Body Control Module has detected an abnormal condition with the retained accessory power function (RAP). Fault may indicate RAP outputs stuck on/off, relay or driver failure, wiring fault, or communication/configuration mismatch. Inspect BCM, relay, wiring, and CAN communications.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Workshop Manuals
Repair manuals for LAND ROVER
3
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop ManualLand Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop ManualLand Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)
Workshop ManualYour experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email