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:

Starting Procedure
1. With your foot off the accelerator pedal, turn the ignition to START. When the engine cranks, let go of the key. The idle speed will go down as the engine gets warm. The vehicle has a Computer-Controlled Cranking System. It assists in starting the engine and protects components. If the ign ...

Thrust Washer and Bearing Cleaning and Inspection
Warning: Wear safety glasses to avoid injury when using compressed air or any cleaning solvent. Bodily injury may occur if fumes are inhaled or if skin is exposed to chemicals. Caution: Do not allow the bearings to spin. Turn them slowly by hand. Spinning the beari ...

Thrust Washer and Bearing Cleaning and Inspection
Warning: Wear safety glasses to avoid injury when using compressed air or any cleaning solvent. Bodily injury may occur if fumes are inhaled or if skin is exposed to chemicals. Caution: Do not allow the bearings to spin. Turn them slowly by hand. Spinning the beari ...