For 1990-2009 cars

### Circuit Description

When the ignition is switched on, the antenna that is integrated in the Theft Deterrent Module (Immobilizer) is energized. The transponder key contains a security code (transponder code) that is transmitted via the antenna to the Theft Deterrent Module. The Theft Deterrent Module compares the received code with the stored transponder code.

### Conditions for Setting the DTC

The security code is not programmed in the Theft Deterrent Module.

### Conditions for Clearing the DTC

• | The conditions of the fault are no longer present.

• | The ignition switch was cycled 20 times.

• | The use of a scan tool.

### Diagnostic Aids

Refer to the security code programming procedure in this section.