2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 668
exit the learn coded key state and DTC B3031 should clear.
瀚慖f the TDM does not exit the learn coded key state after the programming attempt, replace the TDM.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
Control Module References (See: Testing and Inspection/Programming and Relearning) for TDM replacement, setup and programming
B3055
DTC B3055
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptor
DTC B3055 00
- No Transponder Modulation or No Transponder
Circuit/System Description
When an ignition key is inserted into the ignition lock cylinder and the ignition is switched ON, the transponder embedded in the head of the key is
energized by the exciter coils surrounding the ignition lock cylinder. The energized transponder transmits a signal that contains its unique value,
which is received by the theft deterrent module (TDM). The TDM then compares this value to a value stored in memory. This stored value is the
learned key code. If the value is correct, the TDM will send the prerelease password via the serial data circuit to the engine control module (ECM).
If the learned key code does not match or a transponder value is not received, the TDM will send the start disable password to the ECM.
Conditions for Running the DTC
Ignition is in the Accessory or Run position.
Conditions for Setting the DTC
The TDM is unable to measure the ignition key transponder value.
Action Taken When the DTC Sets
* Vehicle starting will be disabled.
* The security indicator will be illuminated.
Conditions for Clearing the DTC
* A current DTC will be cleared when the TDM detects a valid transponder value from the ignition key.
* A history DTC will be cleared after 100 malfunction-free ignition cycles or when a scan tool is used to clear DTCs.
Reference Information
Schematic Reference
Immobilizer Schematics (See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Diagrams/Electrical Diagrams/Immobilizer
Schematics)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
Immobilizer Description and Operation (See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Description and
Operation/Immobilizer Description and Operation)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
