B2468

DTC B2468

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 B2468
- Navigation Display Unit Performance




Circuit Description

The circuitry is internal to the navigation radio. The Navigation ECU performs self diagnostics and sets the DTC if any malfunctions are detected.


Conditions for Running the DTC

* Radio ON.
* Battery voltage must be between 9-16 volts.



Conditions for Setting the DTC

The navigation radio is unable to write to memory and the test detects a computation error.


Action Taken When the DTC Sets

* Black screen and the audio cannot be changed.
* The TV screen adjustment settings change to the default settings.
* The navigation screens may or may not be available.



Conditions for Clearing the DTC

* The condition responsible for setting the DTC no longer exists.
* A history DTC will clear once 50 consecutive malfunction-free ignition cycles have occurred.



Diagnostic Aids

DTC B2468 may be stored as a history DTC with out affecting the operation of the module. If stored as a history DTC and not retrieved as a current DTC, do not replace the module.


Reference Information
Schematic Reference

Radio/Navigation System Schematics (Radio/Navigation System Schematics)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Navigation System Description and Operation (Navigation System 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 Testing

1. Ignition ON, with a scan tool clear all DTCs.
2. Ignition ON, operate the navigation system within the Conditions for Running the DTC.

• If the DTC resets, replace the radio.




Repair Instructions

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


Control Module References (Programming and Relearning) for Radio replacement, setup, and programming