The seat belt buckle switch (Driver side/LH) circuit consists of the SRSCM(Airbag control module) and front Driver seat inner belt assy. In event of accident, Pretensioner and passenger’s side airbags will not operate when the buckle switch are unlocked, to save parts and reduce repair cost.
DTC B1511 is recorded when a malfunction is detected in the seat belt buckle switch (LH) circuit.(Open or short to battery)
Item
Detecting Condition
Possible Cause
DTC Strategy
? Check current(PWM type)
? Short to power in DSBBS harness.
? Short circuit in DSBBS harness.
? Poor connection of connected part.
? Faulty DSBBS.
? Faulty SRSCM.
Enable Conditions
? Ignition "ON"
Threshold Value
? Open or Short to battery
Diagnostic Time
Qualification
? More than 2 sec
De-Qualification
? More than 10 sec
Test Condition
Resistance
Ignition OFF
? Unbuckled = 1? ±10%
? Buckled = 4? ±10%