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Home >> Chevrolet >> 2001 >> Cavalier LS, 2.2 4 >> Repair and Diagnosis >> External Pages >> Different car >> Section 348 (Theft Deterrent System) >> Description and Operation >> Vehicle Theft Deterrent (VTD) Description and Operation >> Powertrain Control Module

Powertrain Control Module

WARNING: This page is about a different car, the 2003 Pontiac Sunfire and 2003 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.

The powertrain control module (PCM) contains the remainder of the logic of the theft deterrent system. If a class 2 message containing a valid password is received from the BCM, the PCM will continue to allow the fuel injectors to operate. The PCM will allow the fuel injectors to operate until it decides there is no valid password coming from the BCM. If the PCM does not receive a class 2 message, or receives a class 2 message with an incorrect password, the engine will crank and will not run or will start and stall immediately.

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