What Does B007D Mean?
This diagnostic trouble code indicates a fault in the deployment control circuit for the second row center seatbelt pretensioner system, specifically the 'B' circuit or component. The restraint control module (RCM) or airbag control module has detected an abnormal condition in the electrical circuit or mechanical component that would activate the seatbelt pretensioner during a collision. The 'subfault' designation suggests a secondary or related issue within the pretensioner deployment system that prevents proper operation.
Safety Warning
This is a critical safety issue as the seatbelt pretensioner will not function properly in a collision, significantly reducing occupant protection for second row center passengers. The vehicle should not be driven until repaired, especially with passengers in the affected seating position. Immediate professional service is required.
Common Causes
35%
Faulty seatbelt pretensioner assembly or internal resistance out of specification
30%
Damaged, corroded, or disconnected wiring harness or connector at the pretensioner
20%
Restraint control module internal fault or corrupted calibration
10%
Low vehicle battery voltage or poor ground connection affecting restraint system
5%
Previous collision deployment or pretensioner already fired
Diagnostic Steps
1
Step 1: Perform a visual inspection of the second row center seatbelt assembly for signs of deployment, physical damage, or previous collision impact. Check for red or orange deployment indicators visible on the pretensioner mechanism.
2
Step 2: Inspect the pretensioner connector at the second row center seat location for corrosion, bent pins, moisture intrusion, or loose connection. Clean and reseat connector if necessary.
3
Step 3: Using a digital multimeter, measure the resistance across the pretensioner squib terminals (with connector disconnected and ignition off). Typical values range from 2-5 ohms; consult manufacturer specifications for exact values. Out-of-range readings indicate pretensioner failure.
4
Step 4: Check continuity and resistance of the wiring harness from the pretensioner connector back to the restraint control module. Look for opens, shorts to ground, or shorts to power (typically should read less than 5 ohms per wire).
5
Step 5: Verify battery voltage at the restraint control module is within specification (typically 11-15 volts). Check all restraint system ground connections for resistance less than 1 ohm.
6
Step 6: If all circuits and components test within specification, perform restraint control module diagnostic self-test function using advanced diagnostic software. If module fails self-test or cannot communicate properly, replace the restraint control module and recalibrate per manufacturer procedures.
Estimated Repair Cost
$300 - $1,200
Parts + labor, varies by vehicle and location
This diagnostic trouble code indicates a fault in the deployment control circuit for the second row center seatbelt pretensioner system, specifically the 'B' circuit or component. The restraint control module (RCM) or airbag control module has detected an abnormal condition in the electrical circuit...
The most common cause of B007D (Second Row Center Seatbelt Pretensioner "B" Deployment Control (Subfault)) is: Faulty seatbelt pretensioner assembly or internal resistance out of specification
Typical repair costs for B007D range from $300 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
This is a critical safety issue as the seatbelt pretensioner will not function properly in a collision, significantly reducing occupant protection for second row center passengers. The vehicle should not be driven until repaired, especially with passengers in the affected seating position. Immediate professional service is required.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B007D to identify the root cause.
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Quick Info
Category
Body
System
Supplemental Restraint System (SRS) / Airbag System
Difficulty
Type
Generic (SAE)
Recommended Tools
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