For 1990-2009 cars only
Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptor
DTC B2461: Navigation ECU Synchronous Signal ErrorCircuit Description
The circuitry is internal to the navigation radio. The Navigation ECU performs self diagnostics and sets the a 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 has detected an internal ECU malfunction.
Action Taken When the DTC Sets
| • | No map or blue screen appears on the display and index is not usable. |
| • | Navigation buttons do not function. |
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. |
Reference Information
Schematic Reference
Radio/Navigation System Schematics
Connector End View Reference
Description and Operation
Navigation System Description and Operation
Electrical Information Reference
| • | Circuit Testing |
| • | Wiring Repairs |
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- Ignition ON, with a scan tool clear all DTCs.
- Ignition ON, operate the navigation system within the Condition for Running the DTC.
| ⇒ | If the DTC resets, replace the radio. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for Radio replacement, setup, and programming
