B1100 (blink 31) on Toyota Corolla E120: Airbag Sensor Assembly Malfunction

Short answer: B1100 means “Airbag Sensor Assembly Malfunction”. The car’s computer has found a fault in the SRS system and turns on the SRS airbag warning. First check: workshop check order (RM821E): CHECK VOLTAGE AT IG1 AND IG2 OF AIRBAG SENSOR ASSEMBLY -> CHECK AIR BAG SENSOR ASSYCENTER.

Code

B1100 · blink 31

System

SRS

Dashboard light

SRS airbag warning

Applies to

Cars with airbags (SRS)

Confidence

high (official Toyota RM821E)

Source

toyotamanuals.gitlab.io

Symptoms and when it is set

1. S Airbag sensor assembly malfunction

Likely causes

1. Airbag sensor assembly

What to check, in order

1. Workshop check order (RM821E): CHECK VOLTAGE AT IG1 AND IG2 OF AIRBAG SENSOR ASSEMBLY -> CHECK AIR BAG SENSOR ASSYCENTER

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 Vitz (1st gen)
• B1100 on all cars compared

← B0138/72 B1135/24 →

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.