B007B
Second Row Left Seat Belt Pretensioner B Deployment Control.
- Generic
- Body
- Generic code
- High severity
How this code is built
- B
- SystemBody
- 0
- Defined bySAE, the same on every car
- 0
- AreaBody area 0
- 7B
- FaultThe specific fault in that area
What it means
B007B is a generic SRS (airbag system) code for the second row left seat belt pretensioner 'B' deployment control. The restraint control unit runs self-tests on the pretensioner's firing circuit and sets this code when it sees a fault, such as an open circuit, short or abnormal resistance. The exact fault type and which pretensioner stage is called 'B' vary by model, so check the manufacturer's data for the vehicle.
Symptoms
- Airbag or SRS warning light on the dashboard
- Rear left seat belt pretensioner may not fire in a crash
- Seat belt warning light or message may show for the rear seats
- Fault may come and go, particularly after the rear seat is moved or the belt is used
- Other SRS codes may be stored alongside it
Possible causes
- Damaged, corroded or loose connector at the rear left seat belt pretensioner or its under-seat or pillar connectorlikely
- Wiring fault in the pretensioner circuit (chafed, broken or shorted wires) near the B-pillar, sill or seat mountinglikely
- Faulty seat belt pretensioner or retractor assembly with an out-of-range internal resistancepossible
- Previous crash or pretensioner deployment where the part was not replaced, or a poorly fitted replacementpossible
- Water ingress or damp in the rear footwell or sill area affecting the connectorspossible
- Faulty restraint control unit with a driver circuit faultrare
How to diagnose
- Read all stored SRS codes and freeze frame or status data, noting whether the fault is current or historic and whether other restraint codes are present
- Check the vehicle history for crash damage, previous SRS repairs, or recent work on the rear seats, trim or belts
- Visually inspect the rear left belt, retractor and pillar trim for damage, and look for water in the footwell and sill
- Following the manufacturer's SRS safety procedure (isolate the battery and wait the specified time), inspect the pretensioner and in-line connectors for corrosion, bent pins, a missing locking clip or poor seating
- Inspect the wiring along its route for chafing, pinching or previous repairs, and gently flex it while monitoring the fault status
- Using only the manufacturer-approved method, check the circuit's resistance and its insulation to earth and supply, without applying a test voltage to the pretensioner itself
- Clear the code after any repair and re-test to confirm it does not return, and check the SRS light goes out
How to fix
- Clean, repair or replace the damaged connector, and make sure it is fully seated with its locking clip secure
- Repair or replace the damaged section of wiring using the manufacturer-approved method
- Replace the rear left seat belt pretensioner or retractor assembly if it is faulty or has been deployed
- Dry out and fix any water leak that has affected the connectors, then replace corroded parts
- Replace or repair the restraint control unit only if the circuits and pretensioner have been proven good and the manufacturer's data supports it
Can I keep driving?
The car may be driveable, but the rear left pretensioner may not work in a crash, so have it inspected as soon as possible. Avoid carrying a passenger in that seat until the fault is repaired.
Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.