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The illumination cancel signal comes from the A/C ECU. This signal is needed because the Speed Pulse does not provide any directional information to the system.Ī) OFF (0) when the gauge assembly brightness control is less than 90 % bightnessī) ON (1) when the gauge assembly brightness knob is more than 90 % brightness. 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. BACK-Reverse indication from taillight relay (Pin 7 of 12-Pin C-connector)Ī) OFF (0) when shift lever is in any position other than reverse.As this scaling factor becomes more accurate, the ‘‘Level'' gradually increases from 0 to 10. Internally, the navigation unit compares the actual VP on the map against street data to adjust the pulse to speed scaling factor. The VSP comes from the ECM as a dedicated signal. VSP-Vehicle Speed Pulse from ECM connector A (Pin 13 of 17-Pin C-connector).If the value on the display does not match the actual vehicle status, then check the wire carrying the signal.
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Signals equal to (0) are OFF, and signals equal to (1) are ON. This screen is used to confirm that navigation unit is properly receiving input signals. If selected, a popup box is displayed asking if you want to clear the memory.
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Accidental selection will erase the customer's personal data, and settings.
#HEADUNIT FOR ECU DIAGNOSTICS GAUGES SERIAL NUMBER#
‘‘Serial No.'' should be the same as the serial number found on the underside of the navigation unit.This information can also be found in Setup by selecting System Information. ‘‘DVD ROM'' represents the database version on the DVD.If the diagnostic still reads NG (ANT), then replace the navigation unit. If this diagnostic reads OK, then order a new GPS antenna. If the wire is crushed or damaged, try a known good antenna. If ‘‘GPS'' indicates ‘‘NG (ANT)'', then check the entire GPS antenna wire from the navigation unit to the antenna.If ‘‘V-RAM'' or ‘‘D-RAM'' is NG, then replace the navigation unit.When this diagnostic is initiated, there is a delay of up to a minute while it runs. This screen looks for problem with the navigation unit. NOTE: The Mic Level indicator must reach the 6th bar or greater to pass the test. Select ‘‘Return'' to return to the Diagnostic Menu, or the ‘‘Exit Diag'' button to exit.A road test, or other diagnostic may be necessary to find the problem. For instance, the GPS antenna wire may be crushed, but still show as ‘‘green''. This diagnostic does not necessarily imply that the individual components are functioning properly. NOTE: Green boxes and green ‘‘OK'' indicate that the communications lines (cables) are intact. After repairing the affected cable or system, repeat this diagnostic. The indicator on the screen may not change until the ignition switch is cycled.Use the troubleshooting index, and other diagnostic screens to help locate the problem. If there is a problem with the system, the faulty system component item will change to red, and the screen will show ‘‘NG'' in red.If all of the communication lines connecting the system components, and the TALK/BACK buttons/microphone check out OK (all block diagram items green), then the ‘‘OK'' indicator will become green.This should cause the ‘‘Cancel‘‘ indicator to go green. The Talk indicator on the screen should become green, and the voice level indicator should move to at least the 6th bar to pass. Press the TALK button on the steering wheel, and in a normal voice, say ‘‘testing‘‘. This includes the voice control switch (TALK/BACK buttons), and the microphone. The system is in a ‘‘Detecting'' mode, and is waiting for all items in white to be tested. When the diagnosis begins, a ‘‘bong‘‘ sound is heard. Ensure that the ignition switch is in the ON (II) position. This diagnostic tests the cables connecting the navigation components.To return to the previous screen, select ‘‘Return''. After the display changes to the Diagnostic Menu, select the item you want to check, and the test will start.