|
|
|
Muting Logic LCD Display Unit Limitations Symptom Duplication Service Precautions 23-66 Navigation System General Troubleshooting Information (cont’d) The accuracy of GPS is reduced during these instances: • Metallic window tinting above the GPS antenna. (four satellite signals are required for accurate • When driving near high tension power lines. operation of some electronic aftermarket accessories • When the satellite control centers are experiencing problems. Whenever the navigation system is giving guidance, • In cold temperatures, the display may stay dark for the first 2 or 3 minutes until it warms up. • When the display is too hot because of direct summer sunlight, it will remain dark until the temperature • When the humidity is high and the interior temperature is low, the display may appear cloudy. • Fingerprints on the touch panel may sometimes be noticeable because of the panel’s low-reflection • unaffected by sunlight. If a touch switch does not • When the symptom can be duplicated, verify that it is not a characteristic of the system. Review the • When the symptom does not reappear or only reappears intermittently, ask the customer about the problem. – Try to establish possible user error or misunderstanding of the system. – Try to establish if outside interference may have been the cause. – Try to duplication the symptom under the same conditions the client experienced. – Vibration, temperature extremes, and moisture (dew, humidity) are factors that are difficult to – Inspect the vehicle for after-market electronic devices (vehicle locators, amps, radar detectors, When interchanging navigation DVD/parts during When troubleshooting navigation system problems, • If the navigation unit needs to be replaced, inform the customer that personal information in the navigation navigation data and transfer it to a new navigation • Check for service bulletins or service news articles that may relate to the customer’s concern. • Before disconnecting the battery, make sure you have the anti-theft codes for the audio system and the • Also obtain any PGM-FI or transmission DTCs and freeze frame data (which will be lost when the ECM/ • The navigation unit is located under the driver’s seat. The unit can be damaged if fluids leak down through • When the battery is disconnected, the internal GPS correct time after the system finishes GPS The touch panel uses a resistive membrane that is replaced. On 2007-2008 models you can back-up the clock is reset to 0:00. The clock will reset to the |