Navigation System Symptom Troubleshooting - Poor RDS-TMC reception or interference
  1. Check for continuity by touching one tester probe to the window antenna terminal (A), and move the other tester probe along the antenna wires.
Is there continuity in all sections of the antenna?
YES -
Go to Step 8 .
NO -
Repair the antenna wires. ■
  1. Remove the navigation unit and check that the navigation unit connector F (3P) (RDS antenna lead) connection.
Is it connected properly?
YES -
Go to Step 9 .
NO -
Reconnect the connector, and recheck the function.■
  1. Disconnect the antenna lead 1P connector from the window antenna.