B0100 on Toyota Vitz (SCP10): Short in driver airbag squib circuit

Short answer: B0100 means “Short in driver airbag squib circuit”. The car’s computer has found a fault in the SRS airbag system and turns on the Airbag (SRS) warning light. First check: disconnect battery and wait 90 s before touching SRS parts.

Code

B0100

System

SRS airbag

Dashboard light

Airbag (SRS) warning light

Also sold as

Toyota Yaris, Toyota Echo (XP10)

Applies to

SRS-equipped cars

Confidence

medium (Toyota Echo 1999–2002 factory diagnostics, same XP10 platform; not confirmed on JDM 1SZ-FE)

Source

carmanualsclub.com

Likely causes

1. Spiral cable (clock spring) under the steering wheel
2. Airbag module
3. Wiring
4. Airbag sensor (centre) assembly

What to check, in order

1. Disconnect battery and wait 90 s before touching SRS parts
2. Check connectors with the scanner, never with a test lamp

Related on this car

• All fault codes for this car
• Warning lights
• Where the parts are (parts map)
• Common problems

Same code on other cars

• B0100 · Toyota Corolla (9th gen, E120)
• B0100 on all cars compared

← C1251 B0101 →

Clearing the code does not fix the fault. If it comes back, the problem is still there. For brakes, airbags and steering, see a trained mechanic.