Chevrolet Sonic Repair Manual: Immobilizer

Ignition Lock Cylinder Replacement

Removal Procedure Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection. Remove the upper trim cover and the lower trim cover f ...

Immobilizer Description and Operation

The immobilizer system functions are provided by the body control module (BCM) and the engine control module (ECM), as well as any modules which store and report the environment identifier. When ...

Other materials:

Hood Ajar Indicator Description and Operation
Hood Ajar Switch The body control module (BCM) applies B+ to the hood ajar signal circuit and monitors the voltage to determine the position of the hood. When the hood is closed, the switch is open and voltage remains high. When the hood is open, the switch is closed and the voltag ...

Special Tools
Illustration Tool Number/ Description BO-24402-A J-24402-A Glass Sealant Cold Knife Remover equalizermagnum BO-39032 J-39032 Stationary Glass Removal Tool ...

Engine Replacement (Manual Transmission)
Special Tools J-45859 Wheel Drive Shaft Remover . CH-807 Closure Plugs .  For equivalent regional tools, refer to Special Tools. Removal Procedure Remove the battery and battery tray. Refer to Battery Tray Replacement. Relieve the fuel system pressure. Refer to Fu ...