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Home >> Fiat >> 2016 >> 500 Turbo, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 117 (Body Control Module (BCM) - DTCS B1000-44 To B10AD-12 - 500 - Except Electric) >> DTC Troubleshooting >> B1002-13-Immobilizer Coil - Circuit Open >> Theory Of Operation

Theory Of Operation

WARNING: This page is about a different car, the 2015 Fiat 500. However, it is still accessible from the selected car via links, so may be relevant.

The immobilizer coil (ring) is mounted around the ignition switch tumbler so that it can read the secret key code stored in the RKE Fob. If the code does not match the secret key code in the Body Control Module (BCM), it will not send a "Start" message to the Powertrain Control Module.

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