For 1990-2009 cars

### 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 B2464 00: Navigation Player Decoding Error

### Circuit/System Description

The circuitry is internal to the navigation radio. The system does not function when the internal temperature reaches 70°C (158°F) or above. This feature prevents heat damage to internal components.

### Conditions for Running the DTC

The radio must detect one of the following power modes:

• | The ignition ON.

• | Battery voltage must be between 9-16 volts.

• | The navigation module detects a power mode transition from OFF to ON.

### Conditions for Setting the DTC

• | Error found with the inserted DVD disc after 4 attempts at reading.

• | The navigation module is unable to read the DVD due to laser focus error, there is a table of contents error or the DVD laser head temperature is above 70°C (158°F).

### 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 for setting the DTC is no longer present.

• | The history DTC will clear after 50 fault-free ignition cycles.

### Diagnostic Aids

• | Cycle the ignition after a successful inspection with a scan tool so initialization will occur.

• | Make sure the map DVD is the correct one for this system.

• | Occasionally it is possible to overheat the navigation system due to excessive ambient heat inside the vehicle. In this instance it may be necessary to allow time for the navigation system to cool.

### Reference Information

#### Schematic Reference

Radio/Navigation System Schematics

#### Connector End View Reference

Component Connector End Views

#### Description and Operation

Navigation System Description and Operation

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

### Circuit/System Verification

Note: Allow the navigation system to cool if the ambient temperature inside the vehicle is excessive and the radio is hot to the touch before proceeding with this diagnostic procedure.

1. Ignition ON, with a scan tool clear all DTCs.
2. Ignition ON, install a known good MAP DVD and operate the system within the Condition for Running the DTC.

⇒ | If B2464 resets, replace the radio.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for Navigation Module replacement, setup, and programming