B1003

B1003 on Fiat — Faulty central locking with airbag and power steering lights on

All the fault codes

Code B1003 concerns the remote control receiver module. On the Fiat 500 1.2 8v it appears together with a series of communication codes, with the central locking not working and several warning lights on.

System
Electronics
Component
Body computer
Fault
The general fault, airbag and steering fault lights come on, with the central door locking not working.
Typical symptoms
  • General fault light on
  • Airbag light on
  • Steering fault light on
  • The central door locking does not work
Vehicles affected
  • Fiat 500 1.2 8v
Main code
  • B1003 Remote control receiver module
Related codes
  • C1003 Speed signal, wiring or control unit
  • C1212 Incorrect engine torque signal, control unit
  • C1215 Brake pedal switch, wiring or switch
  • U0001 C CAN bus
  • U0019 B CAN bus, generic electrical fault
  • U0426 Electronic key, fault
  • U1700 CAN data bus, body computer, fault
  • U1702 CAN data bus, power steering control unit, fault
  • U1706 CAN data bus, ABS control unit, fault
  • U1715 Yaw rate or lateral acceleration node, fault

On this fault the diagnostic tool often returns several codes together.

Solution

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The cause and the repair are on Sema Repair

On Sema Repair this code is linked to verified case studies, with the confirmed cause case by case, the job step by step, indicative times, the manufacturer's notes and a photograph of the component with the point of intervention highlighted.