B0701

Code

Generic B — Body

Body Control Module Configuration Error

Brand: Generic

Type: B — Body

Views: UK: 4 EN: 7 RU: 6

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Incomplete or failed BCM programming update
Incorrect BCM configuration coding for vehicle option/content
Corrupted calibration or parameter data in BCM memory
Clipped/incorrect VIN or vehicle option coding
Battery loss or low battery voltage during programming
Aftermarket device or wiring modification altering BCM signals

Symptoms

Multiple body electrical features inoperative or intermittent (locks, lights, wipers)
BCM not responding to scan tool or communication errors on bus
Incorrect or frozen feature settings (comfort, lighting, locks)
Warning lamps or message center indicating module fault
Keys or remote functions not recognized

What to check

Verify battery voltage is stable (12.4–12.8 V at rest) and charging system is healthy
Scan all modules; record freeze frames, related U-codes, and software/calibration IDs
Check for recent programming or module replacement events in vehicle history
Inspect BCM connectors and harness for corrosion, bent pins, or water damage
Verify VIN and option coding stored in BCM matches vehicle build data
Check for aftermarket devices tied into body networks and temporarily disconnect

Signal parameters

Battery supply to BCM: nominal 12 V (should not drop below ~10 V during tests)
Ground continuity at BCM:
Primary CAN bus: differential idle ~2.5 V per line (CAN_H vs CAN_L differential ~0 V idle, expected ~2.5 V common mode)
LIN bus: expected idle voltage per manufacturer (commonly ~5 V reference when idle)
Module ID/part number and software/calibration version must match OEM reference
Presence of configuration/coding parameters (e.g., VIN, option bytes) via scan tool

Diagnostic algorithm

Record customer complaint, recent repairs, and any programming attempts. Note stored freeze frames and related DTCs.
Verify battery state of charge and charge if necessary. Ensure stable power before further testing.
Connect an OEM-capable scan tool. Attempt to read BCM info: module presence, part number, serial, software/calibration IDs and coding values.
If BCM does not communicate, check power and ground at the module. Repair any wiring or connector issues and re-check communication.
If communication ok, compare BCM coding/options/VIN with build data or dealer database. Look for mismatches or missing option bytes.
If coding is incorrect or missing, reprogram/recode the BCM using OEM procedures and correct calibration. Use stable battery power and follow tool prompts.
If programming fails, inspect for intermittent voltage drops, faulty wiring, or aftermarket interference. Fix root cause and repeat programming.
If reprogramming completes successfully, clear codes and verify all body functions and communications. Re-run diagnostics after a vehicle cycle.
If BCM continues to report configuration errors after correct coding and environment, consider module replacement with proper VIN/configuration and reprogramming.
After repair, perform a final system check and road test to confirm fault resolution and no new DTCs present.

Likely causes

BCM software/calibration version mismatch after replacement or update
Missing module configuration for installed options (e.g., alarm, remote start)
Interrupted programming session due to low battery or tool disconnect
Non-factory aftermarket module or improper retrofit wiring altering BCM inputs
Internal EEPROM/flash corruption from electrical fault or moisture

Fault status

⚠️ Status

BCM reports its internal configuration is invalid or does not match expected vehicle parameters. This may be due to incorrect/missing coding, failed or interrupted programming, corrupted calibration data, or internal module fault. Communication issues or power problems can also trigger this status.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-3.0 hours