Montego 2WD V6-3.0L VIN 1 (2006)
Navigation System: Initial Inspection and Diagnostic Overview
Principles of Operation
PRINCIPLES OF OPERATION
Navigation System
The navigation module is integrated in the audio unit and controls the operation and the interface between the user, the vehicle subsystems, and the
external components. The navigation module is on the medium speed controller area network (CAN) and can be diagnosed with a diagnostic tool. When
installing a new audio unit, it is necessary to upload the module configuration information to the diagnostic tool. Following installation of the audio unit,
download the module configuration information from the diagnostic tool into the new audio unit.
The vehicle navigation system guides the user to a pre-entered destination. A navigation map digital versatile disc (DVD) stored in the navigation
module sends route calculation data to the audio unit. The audio unit audibly and visually instructs the user of the maneuvers required to arrive at the
destination entered.
In order to calculate the initial vehicle position, the GPS antenna is used to track several available satellites simultaneously. The GPS antenna only
receives data and does not communicate with the satellites. A gyroscope, integral to the navigation module, monitors the pitch and yaw of the vehicle
created during cornering or turning. Vehicle speed and reverse signals received through the CAN are also used to detect vehicle speed and direction
changes.
Inspection and Verification
INSPECTION AND VERIFICATION
1. Verify the customer concern.
Visual Inspection Chart
2. Visually inspect for obvious signs of mechanical or electrical damage.
3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before preceding to the next step.
4. If the cause is not visually evident, connect the diagnostic tool to the data link connector (DLC) and select the vehicle to be tested from the
diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:
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check that the program card is correctly installed.
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check the connections to the vehicle.
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check the ignition switch position.
5. If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool operating manual.
6. Carry out the data link diagnostics test. If the diagnostic tool responds with:
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CAN circuit fault; all electronic control units no response/not equipped, refer to Information Bus (Module Communications Network).
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No response/not equipped for the audio control module, refer to Radio, Stereo, and Compact Disc.
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System passed, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and carry out self-test
diagnostics for the audio control module.
7. If the DTCs retrieved are related to the concern, go to the Audio Control Module Diagnostic Trouble Code (DTC) Index to continue diagnostics.
See: Diagnostic Trouble Code Tests and Associated Procedures
8. If no DTCs related to the concern are retrieved, carry out the navigation system self-diagnostics and GO to Symptom Chart. See: Symptom
Related Diagnostic Procedures
Self-Diagnostics
The navigation system provides internal self-diagnostics to assist with diagnosing vehicle concerns.
Press and hold the 3 and 6 memory preset buttons for 3 seconds.