|
Car Status
This screen is used to confirm that navigation unit is properly receiving input signals. Signals equal to (0) are OFF, and signals equal to (1) are ON. If the value on the display does not match the actual vehicle status, then check the wire carrying the signal.
-
VSP-Vehicle Speed Pulse from ECM connector A (Pin 13 of 17-Pin C-connector)
a) OFF (0) when vehicle is not moving
b) ON (1) when vehicle is moving
The VSP comes from the ECM as a dedicated signal. Internally, the navigation unit compares the actual VP on the map against street data to adjust the pulse to speed scaling factor. As this scaling factor becomes more accurate, the ‘‘Level'' gradually increases from 0 to 10.
-
BACK-Reverse indication from taillight relay (Pin 7 of 12-Pin C-connector)
a) OFF (0) when shift lever is in any position other than reverse
b) ON (1) when shift lever is in reverse
The Back signal is used by the navigation unit to allow the map screen to show the VP moving backwards when in reverse and to trigger the optional rear view camera. This signal is needed because the Speed Pulse does not provide any directional information to the system.
The illumination cancel signal comes from the A/C ECU.
The A/C ECU gets the signal off of B-CAN from the gauge assembly and sends it to the Navi ECU using the communication between A/C and Navi (Pins 4, 14, and 15 in the 20-Pin A navigation control unit connector.
-
ILL-Illumination Indication (Pin 5 of navigation unit 20-Pin A-connector)
a) OFF (0) when parking lights, or headlights are off
b) ON (1) when parking lights, or headlights are on
This signal is used by the navigation unit to determine whether to put the navigation screen into the Day or Night brightness mode. (Setup screen 1)
-
DVD Lid-senses if DVD door is open
a) (Close) when door is closed
b) (Open) when door is open
The navigation unit has a microswitch to detect this. If open is indicated when the door is closed, replace the navigation unit.
|