B1002 - Body Control Module Malfunction in Honda and Toyota Models

Quick Answer

B1002 means: B1002 indicates a Body Control Module malfunction, affecting various electronic functions in your vehicle.

Fix: Check and replace faulty components Cost: $300 - $700 Time: 90-180 minutes

Can I drive with B1002? Immediate attention is recommended to avoid safety issues and further damage.

Common Questions

What does B1002 mean and how does it affect my car?

The B1002 code signifies a malfunction in your car's Body Control Module, which manages various electronic functions. If this module fails, you may experience issues with lights, locks, and windows, affecting comfort and safety.

What are the most common causes of B1002 and how much does it cost to fix?

Common causes include a defective Body Control Module, faulty wiring, and sensor issues. Fixing it can range from $150 for wiring repairs to $700 for BCM replacement.

Can I drive my car with B1002 or should I stop immediately?

While you may still drive, it's advisable to address the B1002 code quickly to avoid potential safety hazards, such as malfunctioning lights or locks.

How can I diagnose B1002 myself using GeekOBD APP?

Using the GeekOBD APP, you can perform an OBD2 scan to read the B1002 code, check freeze frame data, and monitor BCM performance, which helps in pinpointing the issue.

What vehicles are most commonly affected by B1002?

Vehicles like the 2010-2018 Honda Accord and 2012-2019 Toyota Camry frequently exhibit the B1002 code due to BCM issues, and owners should be aware of this potential problem.

How can I prevent B1002 from happening again?

Regular maintenance, including inspecting wiring and connections, can help prevent future BCM issues. Keeping your vehicle dry and clean will also help protect the BCM from moisture damage.

What is B1002?

The B1002 diagnostic trouble code indicates a malfunction in the Body Control Module (BCM), which plays a crucial role in controlling various electronic functions in your vehicle. This code is often associated with makes such as Honda and Toyota, particularly in models from 2007 to 2019. When the BCM fails or experiences communication issues, it can lead to various malfunctions, including problems with the vehicle's lights, windows, locks, and other body-related systems. In real-world terms, if your vehicle is exhibiting erratic behavior in these electronic systems, it could be due to the BCM's inability to process or send signals correctly. Not only does this affect convenience features, but it can also pose safety risks if essential systems like the lighting or alarm system are compromised. It’s essential to address this code promptly to ensure your vehicle operates safely and efficiently.

System: B - Body (Airbags, Lighting, Security, Climate Control)

Symptoms

Common symptoms when B1002 is present:

  • The check engine light or other warning lights illuminate on the dashboard, signaling an issue with the vehicle's electronic systems.
  • Power windows may work intermittently or not at all, impacting your ability to control ventilation and comfort.
  • Door locks may fail to respond to commands from the remote or the internal switch, leading to security concerns.
  • Dashboard gauges may exhibit erratic behavior, providing inaccurate readings of speed or fuel levels.
  • Interior lights may flicker, not turn on, or remain on continuously, draining the vehicle's battery over time.

Possible Causes

Most common causes of B1002 (ordered by frequency):

  1. The most common cause of the B1002 code is a defective Body Control Module, which occurs in about 60% of cases. This can happen due to electrical shorts, exposure to moisture, or simply wear over time.
  2. Another frequent cause is wiring issues between the BCM and other control modules, often resulting from frayed wires or poor connections, occurring in approximately 20% of cases.
  3. Faulty sensors that feed data to the BCM can also trigger this code. Regular maintenance checks can help prevent sensor-related issues.
  4. Less commonly, software glitches in the BCM may cause the error. Updating the vehicle's software can resolve this.
  5. In rare instances, extreme environmental conditions or accidents that compromise the BCM's integrity can lead to this code being thrown.

B1002 Repair Costs

Cost Breakdown by Repair Type

BCM Replacement

Replacing the faulty Body Control Module with a new or refurbished unit.

  • Total: $300 - $700
  • Success rate: 90%
Wiring Repair

Repairing damaged wiring or connections leading to the BCM.

  • Total: $150 - $300
  • Success rate: 80%
Money-Saving Tips for B1002
  • Start with the most common and least expensive repairs first
  • Use GeekOBD APP to confirm diagnosis before replacing expensive parts
  • Consider preventive maintenance to avoid future occurrences
  • Compare prices for OEM vs aftermarket parts based on your needs
  • Address the issue promptly to prevent more expensive secondary damage

Diagnostic Steps

Professional B1002 Diagnosis Process

Follow these systematic steps to accurately diagnose B1002. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes)

Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 2: Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes)

Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 3: Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the BCM and related components (20-30 minutes)

Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the BCM and related components (20-30 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 4: Step 4: System function test - Verify proper operation after repairs and clear codes (10-15 minutes)

Step 4: System function test - Verify proper operation after repairs and clear codes (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success (15-20 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.

Important Notes

  • Always verify the repair with GeekOBD APP after completing diagnostic steps
  • Clear codes and test drive to ensure the problem is resolved
  • Address underlying causes to prevent code recurrence

Real Repair Case Studies

Case Study 1: BCM Replacement on 2015 Honda Accord

Vehicle: 2015 Honda Accord, 75,000 miles

Problem: Customer reported intermittent lighting issues and door locking problems.

Diagnosis: Diagnostic scan revealed B1002 code. Visual inspection showed corroded wiring.

Solution: Replaced the Body Control Module and repaired wiring connections.

Cost: $550 (BCM: $400, Labor: $150)

Result: All electronic functions restored, and customer reported satisfaction.

Case Study 2: Wiring Repair on 2018 Toyota Camry

Vehicle: 2018 Toyota Camry, 50,000 miles

Problem: Customer experienced failure of interior lights and windows.

Diagnosis: B1002 code confirmed; wiring harness showed signs of wear.

Solution: Repaired and replaced damaged wiring connections.

Cost: $200 (Labor: $100, Parts: $100)

Result: Functionality restored, no further issues reported.

Diagnose B1002

Use GeekOBD APP for professional diagnosis!

  • Real-time data monitoring
  • Advanced diagnostic features
  • Step-by-step repair guidance
  • Professional-grade analysis
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Code Information

Code: B1002
System: Body (Airbags, Lighting, Security, Climate Control)
Severity: HIGH
Category: Body Codes