B2794

DTC B2794

Diagnostic Instructions

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

DTC Descriptor
DTC B2794
- Unmatched Encryption Code

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 partially unmatched key has been inserted into the ignition cylinder.

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 (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)

Scan Tool Reference

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

Circuit/System Verification

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)