B2464

CIRCUIT DESCRIPTION
The circuitry is internal to the navigation module (NAV). 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 navigation module (NAV) detects a power mode transition from OFF-ASLEEP to ON.
^ The NAV attempts a read from the CD or when a new CD is inserted.
^ Neither DTC B1328 nor DTC B1327 is current.

CONDITIONS FOR SETTING THE DTC
The navigation module (NAV) is unable to read the CD because of a laser focus error, there is a table of contents error or the CD laser head temperature is above 70°C (158°F).

DTC B2464 does not set if DTC B1328 or DTC B1327 is current.

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.
^ This failure has no effect outside the navigation system.

CONDITIONS FOR CLEARING THE DTC
^ A current DTC clears when the navigation module (NAV) detects a read from a navigation CD.
^ The laser head temperature cools to less than 70°C (158°F)

DIAGNOSTIC AIDS

IMPORTANT: If DTC B2463 or B2465 is also set with DTC B2464, service B2463 and B2465 before DTC B2464.

Make sure the map CD is the correct one for this system.

Cycle the ignition switch even after a successful inspection with a scan tool so initialization will occur.

TEST DESCRIPTION

Steps 1-7:

The number(s) below refer to the step number(s) on the diagnostic table.
1. Determines if the malfunction is present.
2. Determines if the malfunction was due to no map CD in the navigation module CD player.