B0103: Short in D Squib Circuit (to B+)
Short answer: B0103 means “Short in D Squib Circuit (to B+)”. Below is what it means on each of the 2 cars we cover, with a link to the full page for each car.
B0103 on each car
| Car | Meaning on this car | Confidence |
|---|---|---|
| Toyota Vitz (1st gen) | Short to B+ in driver airbag squib circuit | medium |
| Toyota Corolla (9th gen, E120) | Short in D Squib Circuit (to B+) (B0103/12) | high |
Symptoms
- 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
- Steering wheel pad (D squib); Spiral cable; Airbag sensor assembly; Wire harness
What to check, in order
- 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
Causes and checks above are the general meaning. The exact test steps and values differ by car: open your car’s page.