Pinpoint Test H: Navigation System Does Not Operate Correctly - Unable To Insert Or Eject A Map Disc

WARNING: This page is about a different car, the 2005 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.

H1 CHECK CIRCUIT 1499 (PK/LG) FOR VOLTAGE
- Key in OFF position.
- Disconnect: Navigation System Module C4209.
- Key in ON position.
- Measure the voltage between the navigation system module C4209 pin 2, circuit 1499 (PK/LG), harness side and ground.
  
  Fig 1: Measuring Voltage Between Navigation System Module C4209 Pin 2, Circuit 1499 (PK/LG), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes : GO to H2.
- No : REPAIR the circuit. TEST the system for normal operation.
H2 CHECK CIRCUIT 694 (BK/LG) FOR AN OPEN
- Key in OFF position.
- Measure the resistance between the navigation system module C4209 pin 13, circuit 694 (BK/LG), harness side and ground.
  
  Fig 2: Measuring Resistance Between Navigation System Module C4209 Pin 13, Circuit 694 (BK/LG), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : GO to H3.
- No : REPAIR the circuit. TEST the system for normal operation.
H3 CHECK FOR CORRECT NAVIGATION SYSTEM MODULE OPERATION
- Disconnect all the navigation system module connectors.
- Check for:
  - corrosion
  - pushed-out pins
- Connect all the navigation system module connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- Yes : INSTALL a new navigation system module. REFER to NAVIGATION SYSTEM MODULE . TEST the system for normal operation.
- No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.