Navigation System Will Not Accept Security Code

Navigation system will not accept security code

NOTE:
- The system will not operate without the 4-digit security (anti-theft) code. Follow the this procedure. (After 10 consecutive tries, you must cycle the key to continue trying)
- The "Navigation System Diagnosis and Core Return Form" is available on ISIS, under "Job aids" and can be printed out for recording this information. This information will help the reman facility determine what caused the failure.

1. Go into the "System diagnosis menu", select "Unit check," and then "Navi ECU." A brief diagnostic will run for 20 seconds, and the serial number is then displayed.

Is the serial number displayed?

YES - Go to step 3.

NO - Go to step 2.

2. Check the navigation unit.

Is there a serial number on the label of the underside of the navigation unit?

YES - Go to step 3.

NO - Replace the navigation unit.

3. Using the Serial Number, look up the navigation security code in the Interactive Network, (click: Service, Vehicle Information, Anti-Theft code Inquiry, and then select "Navigation" from the "product" drop down box). Enter the serial number.

Is a 4-digit code displayed on the screen?

YES - Go to step 4.

NO - Call the Warranty Department, the telephone number is listed in the PDI/TQI bulletin, to obtain the code. Then go to step 5.

4. Check that the obtained code works to bypass the code screen in the navigation system.

Does the code work?

YES - The system is OK at this time. Return the car to the client and give them the anti-theft code.

NO - Go to step 5.

5. Try entering four zeros (0000) in place for the code.

Do the four zeros work to bypass the code screen?

YES - Replace the control unit, and enter in the "problem description field" of the core return form: "Security code is 0000."

NO - Replace the control unit, and enter in the "problem description field" of the core return form: "Won't take security code" (as proof, enclose the sticker that contains the Serial number and the Code).