Diagnostic Instructions
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
Connector End View Reference
Component Connector End Views
Description and Operation
Immobilizer Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References 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.
- Perform the Vehicle Key Learn procedure. Refer to
Replacing Keys.
- 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 after completing the diagnostic procedure.
