B3755

DTC B3755

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview)provides an overview of each diagnostic category.



DTC Descriptor
DTC B3755 48
- No Transponder Key Programmed




Circuit/System Description

When a remote key is inserted into the ignition lock cylinder and the ignition is turned ON, the transponder embedded in the remote key is energized by the exciter coils located in the theft deterrent module (TDM) surrounding the ignition lock cylinder. The energized transponder transmits a signal that contains its unique value, which is received by the TDM. The TDM is directly secured to the steering column module (CIM). The CIM compares this unique value to a value stored in memory. If the value is correct, the CIM will request vehicle starting.


Conditions for Running the DTC

Ignition ON


Conditions for Setting the DTC

The transponder value measured by the TDM is incorrect or not learned to the vehicle


Action Taken When the DTC Sets

* Vehicle starting is disabled
* The Service Vehicle Soon indicator will flash and/or the Safeguard Check message is displayed on the driver information center (DIC)



Conditions for Clearing the DTC

* A current DTC will be cleared when the TDM detects a programmed transponder value from the remote key.
* A history DTC will clear after 100 malfunction free ignition cycles.



Reference Information
Schematic Reference

Immobilizer Schematics (Immobilizer Schematics)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Immobilizer Description and Operation (Immobilizer Description and Operation)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning)for scan tool information


Circuit/System Verification

Important: When using this diagnostic, more than one remote key is required to ensure proper diagnosis. If more than one key is not available at the time of service, contact the customer and ask if any other keys can be provided for service.



1. Perform the Vehicle Key Learn procedure. Refer to Replacing Keys (Service and Repair) .
2. While viewing the appropraite scan tool CIM Transponder-Key Status parameter, turn ON the ignition with each of the available remote keys. The parameter should read Programmed with all available keys.

• If not the specified value, replace the appropriate key. If the DTC resets, replace the CIM.




Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Replacing Keys (Service and Repair)
* Control Module References (Programming and Relearning)for CIM replacement, programming, and setup