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Diagnosis Tips Concerning The Navigation Function

  1. The precision of the GPS positioning is limited due to its operation principles. So, some of customer reports do not mean that the system is defective.

    Prior to troubleshooting, question your customer about how the navigation system is used and where he/she drives. If you determine that the system is OK, explain to your customer about how the system works and how the customer should operate it.

  2. If the system is not OK, diagnose the system according to the trouble symptom chart.