B0103 (blink 12) on Toyota Corolla E120: Short in D Squib Circuit (to B+)

Short answer: B0103 means “Short in D Squib Circuit (to B+)”. 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 D SQUIB CIRCUIT -> CHECK AIR BAG SENSOR ASSYCENTER -> CHECK D SQUIB -> CHECK INSTRUMENT PANEL WIRE -> CHECK SPIRAL CABLE SUB−ASSY.

Code

B0103 · blink 12

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 Short circuit in D squib wire harness (to B+) S D squib malfunction S Spiral cable malfunction S Airbag sensor assembly malfunction

Likely causes

1. Steering wheel pad (D squib); Spiral cable; Airbag sensor assembly; Wire harness

What to check, in order

1. Workshop check order (RM821E): CHECK D SQUIB CIRCUIT -> CHECK AIR BAG SENSOR ASSYCENTER -> CHECK D SQUIB -> CHECK INSTRUMENT PANEL WIRE -> CHECK SPIRAL CABLE SUB−ASSY

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

• B0103 · Toyota Vitz (1st gen)
• B0103 on all cars compared

← B0102/11 B0105/53 →

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.