B2793

DTC B2793

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 B2793
- Transponder Chip Malfunction

Circuit Description

Embedded in the vehicle key is a transponder chip. This transponder chip contains unique values (codes) that are read by the theft deterrent key transponder during vehicle starting. The vehicle key has two codes: The key code (immobilizer code) and the wireless code. Both of these codes need to be registered before vehicle starting will be allowed.

Conditions for Running the DTC

The key is inserted into the ignition cylinder.

Conditions for Setting the DTC

* A key malfunction has occurred during the key code registration
* The key code is unable to be registered

Action Taken When the DTC Sets

Engine starting will be disabled.

Conditions for Clearing the DTC

The DTC will clear when the conditions for setting the DTC have been corrected.

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

1. Ignition ON, clear DTCs.
2. Re-register the vehicle keys. Refer to Immobilizer System Component Programming (Programming and Relearning).
3. Start the vehicle and verify DTC B2793 is not set.

• If vehicle starting is disabled or the DTC is set, replace the vehicle key.

Repair Instructions

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

Immobilizer System Component Programming (Programming and Relearning)