B2468

CIRCUIT DESCRIPTION
Internal error detection is determined inside the navigation display head (NDH). No external circuits are involved.

CONDITIONS FOR RUNNING THE DTC
The navigation display head (NDH) performs this test when it detects a power mode transition to one of the following:
^ ACC
^ ON

The navigation display head (NDH) does not set this DTC if B1327 or B1328 is current.

CONDITIONS FOR SETTING THE DTC
The navigation display head (NDH) is unable to write to memory and the test detects a computation error.

ACTION TAKEN WHEN THE DTC SETS
Any of the following may be observed:
^ Black screen and the audio cannot be changed.
^ The TV screen adjustment settings change to the default settings.
^ The navigation screens may still be available.

CONDITIONS FOR CLEARING THE DTC
The navigation display head (NDH) is able to write to memory and there is no computation error when there is a power mode transition.

DIAGNOSTIC AIDS
^ This DTC may be stored as a history DTC with out affecting the operation of the module. If stored only as a history DTC and not retrieved as a current DTC, do not replace the module.
^ If this DTC is retrieved as both a current and history DTC, replace the module.

TEST DESCRIPTION

Steps 1-4:

The number(s) below refer to the step number(s) on the diagnostic table.
1. Determines if the malfunction is present.
2. Verifies that the DTC sets under normal operating conditions.