B1100 on Toyota Vitz (SCP10): Airbag sensor assembly malfunction

Short answer: B1100 means “Airbag sensor assembly malfunction”. 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

B1100

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. Airbag sensor 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

• B1100 · Toyota Corolla (9th gen, E120)
• B1100 on all cars compared

← B0108

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.