Lost Communication With Body Control Module
The vehicle's high-speed central data network has lost all real-time data connection contact with the primary Body Control Module (BCM). Because this computer module controls basic infrastructure like exterior lighting, door electronic latches, and window systems, a communication drop bricks peripheral operations.
Estimated Cost
$580
Repair Time
2-3 hours
Difficulty
Shop Recommended
Can I Fix This Myself?
Professional Service Recommended
This repair involves high-voltage components or specialized equipment.
What professionals will use:
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Step-by-Step Fix Instructions
- 1
Perform a complete low-voltage system hard power reboot by disconnecting the small auxiliary accessory battery for 15 minutes.
- 2
Test the 12V auxiliary battery's structural state-of-health; low voltages can cause data processing chip lockups.
- 3
Pull out the main cabin interior fuse box panel sheets to inspect and replace blown BCM logic circuit fuses.
- 4
Locate the central body control module under the kick panel dashboard and check that the multi-pin plugs are clicked in tight.
- 5
Disconnect the main BCM wire harness blocks to search for loose grounding ring pins or wire corrosion trails.
- 6
Install a brand-new factory body control module processing hub card assembly and program local vehicle VIN security keys.
Check Your Warranty Before Paying
Federal law requires EV battery warranty coverage for 8 years / 100,000 miles minimum. Many manufacturers offer 10-year coverage. An authorized dealership can confirm coverage for your VIN at no charge.
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Step-by-Step Diagnostic Wizard
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