Removal Procedure
CAUTION:
With wheels of the vehicle facing straight ahead, secure the steering
wheel utilizing steering column anti-rotation pin, steering column
lock, or a strap to prevent rotatio
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diagnostic Procedure Instructions provides an overview of each
diagnostic category.
DTC Descriptors
D
IMMOBILIZER DESCRIPTION AND OPERATION
Fig. 5: Immobilizer Diagram Without BTM
The immobilizer system functions are provided by the body control module (BCM)
and the engine control
module (ECM), as well as any control modules which store and report the
environment identifier.
When an ignition ke