U2153

CIRCUIT DESCRIPTION
The VICS circuit board installed in the navigation module (NAV) communicates with the main circuit board in the NAV over a dedicated connection within the NAV case. This DTC indicates an internal fault inside the NAV case.

CONDITIONS FOR RUNNING THE DTC
The vehicle must be equipped with VICS.

The navigation module (NAV) must detect a power mode transition from OFF-ASLEEP to ON.

The navigation module (NAV) does not set this DTC if B1327 or B1328 is current.

CONDITIONS FOR SETTING THE DTC
There is no response from the VICS processor when queried by the navigation module (NAV) after successfully initializing the system.

The navigation module (NAV) does not receive information from the VICS processor when the NAV detects a power mode transition to ON.

ACTION TAKEN WHEN THE DTC SETS
The VICS switch disappears from the navigation system menu.

CONDITIONS FOR CLEARING THE DTC
The navigation module (NAV) receives a response from the VICS processor.

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 VICS circuit board is installed correctly in the navigation module.