What it means
This code identifies a fault associated with the third row left seat belt load limiter deployment control. The restraint control module sets it when it detects a problem in that deployment control; the exact fault is specified by accompanying subfault information.
How it works
The restraint control module monitors the deployment circuit for the third-row left seat belt load limiter. It stores B0086 when that circuit fails a self-check; the accompanying subfault information identifies the detected fault type.
Common causes
Most likely first.
- Load limiter wiring or connector fault
- Open or shorted deployment circuit
- Faulty third row left load limiter
- Restraint control module fault
Symptoms
- Airbag warning light on
- Third row left load limiter may not operate in a crash
How to diagnose it
- Read the restraint module's freeze-frame data and subfault details to identify when the third-row left circuit failed and what condition was recorded.
- With the SRS system made safe according to the vehicle manufacturer's procedure, inspect the third-row left load limiter connector and wiring for damage, looseness, corrosion, or pinching.
- Check for recent work around the third-row left seat or trim that may have disturbed its wiring.
- Use the manufacturer's diagnostic procedure to test the deployment circuit for an open or short; do not probe or apply power to an SRS circuit with ordinary test equipment.
- If the wiring passes its specified checks, test the third-row left load limiter and restraint control module according to the vehicle-specific procedure.
Common fixes
- Secure or repair a loose or damaged third-row left load limiter connector.
- Repair damaged wiring in the third-row left deployment circuit.
- Replace the third-row left load limiter if it fails the manufacturer's test.
- Repair or replace the restraint control module only if its checks confirm an internal fault.
Can I keep driving?
The vehicle may be drivable, but the third-row left load limiter may not work properly in a crash, and the SRS warning light indicates a restraint-system fault. Have the fault diagnosed promptly and avoid carrying a passenger in that seat until it is repaired.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.