Code
B2795
Generic
B — Body
Body Control Module Configuration Error
Views:
UK: 3
EN: 2
RU: 2
AI status
Completed
Completed
100%
Causes
- Incomplete or failed BCM programming or calibration update
- Incorrect or mismatched replacement BCM installed (wrong part or software level)
- Corrupted BCM memory or software
- Low or unstable battery voltage during programming or operation
- CAN/LIN network communication faults between BCM and other modules
- Poor ground, loose connector, corroded pins, or blown fuse supplying the BCM
Symptoms
- BCM-related features inoperative or intermittent (lights, locks, wipers, windows, HVAC controls)
- Keyless entry/remote lock or immobilizer/wakeup faults
- Instrument cluster warnings or message about module configuration
- Failure to communicate with BCM using a scan tool or partially responsive BCM
- Difficulties with vehicle start or security/anti-theft functions
What to check
- Read all stored codes and freeze-frame data from BCM and related modules (CAN network codes)
- Record BCM part number, software/calibration ID, VIN, and coding parameters from the tool
- Check battery voltage (ideally 12.6 V+ static, >13 V during cranking/charging) and charging system health
- Inspect BCM power, ground, fuses, and mating connectors for damage, corrosion, or loose pins
- Verify CAN/LIN bus integrity: wiring, terminators, short/open, and bus voltage levels
- Check for recent programming or module replacement events and for aftermarket device installations
Signal parameters
- BCM part number and software/calibration ID (CID/CalID)
- BCM coding/programming status flag
- Vehicle VIN reported by BCM
- Power supply voltage to BCM (battery and ignition present)
- CAN bus error counters / message counts / diagnostic trouble counts
- Module awake/asleep state and last wake-up source
Diagnostic algorithm
- Connect OEM-level scan tool. Read and record DTCs and freeze frame from BCM and related modules (U-codes on CAN).
- Check battery state-of-charge and charging system; ensure stable voltage (use battery charger if needed).
- Attempt communication with BCM. If no communication, inspect BCM power, ground, fuses, and connectors; repair any wiring faults.
- Inspect CAN/LIN physical layer: check wiring, shorts/opens, termination resistors, and other module communication. Repair bus faults.
- If communication is possible, record BCM part number, software ID, VIN, and coding. Compare to factory data and other module VINs. Note mismatches.
- Check vehicle history for recent BCM replacement or programming. If BCM was replaced or programming was interrupted, perform correct OEM programming/coding with a factory tool. Ensure stable battery and follow tool prompts.
- Clear codes and re-test. If code returns, attempt reprogramming/reflashing to latest factory calibration. Follow any specific relearn or initialization procedures (immobilizer/key sync, window/door relearns) after programming.
- If programming fails repeatedly with good power and communication and wiring verified, consider BCM hardware fault and replace with correct part followed by programming/coding.
- After repair, verify function of BCM-controlled systems, clear stored DTCs, and perform a road test or vehicle checks to ensure issue resolved.
Likely causes
- Incorrectly programmed or unprogrammed replacement BCM
- Failed programming due to low battery or tool interruption
- CAN bus communication error preventing configuration validation
- Loose/poor BCM power or ground connection causing memory corruption
- Aftermarket device changed BCM settings or interfering with communication
Fault status
Status
BCM configuration validation failed: module calibration, coding, or communication is invalid or inconsistent with vehicle data. Programming or wiring issues may be present.
Repair difficulty: Medium
Diagnostic time: 1.5-3.0 hours
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Code
B2795
LAND ROVER
B — Body
Driver solar radiation sensor circuit short to ground
Views:
UK: 12
EN: 16
RU: 13
AI status
Completed
Completed
100%
Causes
- Incomplete or failed BCM programming or calibration update
- Incorrect or mismatched replacement BCM installed (wrong part or software level)
- Corrupted BCM memory or software
- Low or unstable battery voltage during programming or operation
- CAN/LIN network communication faults between BCM and other modules
- Poor ground, loose connector, corroded pins, or blown fuse supplying the BCM
Symptoms
- BCM-related features inoperative or intermittent (lights, locks, wipers, windows, HVAC controls)
- Keyless entry/remote lock or immobilizer/wakeup faults
- Instrument cluster warnings or message about module configuration
- Failure to communicate with BCM using a scan tool or partially responsive BCM
- Difficulties with vehicle start or security/anti-theft functions
What to check
- Read all stored codes and freeze-frame data from BCM and related modules (CAN network codes)
- Record BCM part number, software/calibration ID, VIN, and coding parameters from the tool
- Check battery voltage (ideally 12.6 V+ static, >13 V during cranking/charging) and charging system health
- Inspect BCM power, ground, fuses, and mating connectors for damage, corrosion, or loose pins
- Verify CAN/LIN bus integrity: wiring, terminators, short/open, and bus voltage levels
- Check for recent programming or module replacement events and for aftermarket device installations
Signal parameters
- BCM part number and software/calibration ID (CID/CalID)
- BCM coding/programming status flag
- Vehicle VIN reported by BCM
- Power supply voltage to BCM (battery and ignition present)
- CAN bus error counters / message counts / diagnostic trouble counts
- Module awake/asleep state and last wake-up source
Diagnostic algorithm
- Connect OEM-level scan tool. Read and record DTCs and freeze frame from BCM and related modules (U-codes on CAN).
- Check battery state-of-charge and charging system; ensure stable voltage (use battery charger if needed).
- Attempt communication with BCM. If no communication, inspect BCM power, ground, fuses, and connectors; repair any wiring faults.
- Inspect CAN/LIN physical layer: check wiring, shorts/opens, termination resistors, and other module communication. Repair bus faults.
- If communication is possible, record BCM part number, software ID, VIN, and coding. Compare to factory data and other module VINs. Note mismatches.
- Check vehicle history for recent BCM replacement or programming. If BCM was replaced or programming was interrupted, perform correct OEM programming/coding with a factory tool. Ensure stable battery and follow tool prompts.
- Clear codes and re-test. If code returns, attempt reprogramming/reflashing to latest factory calibration. Follow any specific relearn or initialization procedures (immobilizer/key sync, window/door relearns) after programming.
- If programming fails repeatedly with good power and communication and wiring verified, consider BCM hardware fault and replace with correct part followed by programming/coding.
- After repair, verify function of BCM-controlled systems, clear stored DTCs, and perform a road test or vehicle checks to ensure issue resolved.
Likely causes
- Incorrectly programmed or unprogrammed replacement BCM
- Failed programming due to low battery or tool interruption
- CAN bus communication error preventing configuration validation
- Loose/poor BCM power or ground connection causing memory corruption
- Aftermarket device changed BCM settings or interfering with communication
Fault status
Status
BCM configuration validation failed: module calibration, coding, or communication is invalid or inconsistent with vehicle data. Programming or wiring issues may be present.
Repair difficulty: Medium
Diagnostic time: 1.5-3.0 hours
Similar codes
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Repair manuals for LAND ROVER
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Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop Manual199,00 UAH
Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop Manual199,00 UAH
Land Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)
Workshop Manual199,00 UAH
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
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0
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