A flat battery has left the radio unworkable i have the code but would like the format as i am told you only have three attemptes

NO YEAR CAR TOLD
THE RADIO IS SECURE\
SO ONLY NISSAN CAN UNLOCK IT, IT IS THEIR OEM RADIO.
GOOGLE THIS SEE THIS SAME ANSWER 1MILLION TIMES./
THE RADIO SELLER DID NOT GIVE YOU THE DAY1 NEW CAR
GLOVE BOX RADIO CAR TAG, THAT SAYS DO NOT LOSE THIS TAG.SO ITS LOST.! dang.

ON NEWER CARS, THE MANUAL STATES
TO remove car battery first ask the radio its secure code.!!
write it down, now. oops?
then remove and replace car battery, if not done a trip to nissan or call them on the phone and ask them,, it is their secure radio,.
end story told 1million times. +1 more.

ENTERING SECURITY CODE

Most vehicles are equipped with Heidelberg V or VI radios that are equipped with a theft protection program. When the battery has been is disconnected or if the radio has been removed, the radio will lock-up electronically and cannot be operated until the security code is entered. On the Heidelberg V, if the proper code is not entered in six attempts, the radio will lock-up permanently and cannot be repaired. On the Heidelberg VI, two incorrect attempts will lock the radio for about 1 hour.
The Heidelberg V may have a code assigned at the factory or a personal code created by the owner. The Hiedelberg VI has a code assigned at the factory and entered by the dealer during pre-delivery inspection. New radios come with the code printed on a sticker but not entered into memory. All codes are 4 digits. To code the radio:
Heidelberg V

1. Turn the radio ON . The radio should display the word SAF. DO NOT attempt to eject a cassette with the radio in this mode.
2. Push the AM/FM and SCAN buttons at the same time and hold them until the display changes, then release them immediately. The number 1000 will appear for about 3 seconds, then the display will go blank. Release the buttons then.

NOTE If the buttons are held too long, the radio will interpret this as an attempt to enter an incorrect code.

1. Use the first four station selector buttons to enter the code. The first digit of the code is always 1. Each time the other buttons are pushed, the number in that position will change.
2. When the code appears correctly in the display, push the AM/FM and SCAN buttons at the same time. When the radio plays and displays a frequency, release the buttons.
3. If the code was entered incorrectly three times, momentarily disconnect the battery and try again. If the code is entered incorrectly three more times, the radio cannot be coded and cannot be repaired.

Heidelberg VI

1. Turn the radio ON . The radio should display the word SAF. DO NOT attempt to eject a cassette with the radio in this mode.
2. Push the AM/FM and SCAN buttons at the same time and hold them until the display changes, then release them immediately. The number 1000 will appear and remain in the display.

NOTE If the buttons are held too long, the radio will interpret this as an attempt to enter an incorrect code.

1. Use the first four station selector buttons to enter the code. Each time a button is pushed, the number in that position will change.
2. When the code appears correctly in the display, push the AM/FM and SCAN buttons at the same time. When SAF appears in the display, release the buttons. The radio should play and display a frequency.
3. If the code was entered incorrectly two times, leave the radio ON for one hour and try again. This can be repeated as often as required.

• The 4-digit code for your radio is listed on the two radio security cards supplied with the vehicle.
• Enter the code by using the pre-set buttons numbered 1 to 6 and a "beep sound" occurs.
• If the code is not properly entered, then begin the code entry again, starting with the first digit. If the code is not properly entered in three successive attempts the radio will not accept any entry until the radio has been left on for one hour (the radio display will show the word 'WAIT'). After one hour in the 'on' position the radio will accept three additional entries.

Note: Should you lose your radio security cards, contact your Jaguar Dealer, who for security reasons will require proof of vehicle ownership.

I hope this info helps!

~subyguru~

Pull the radio and get the model # and serial number from the radio. Got to the dealer and ask them to verify that it is the correct radio for you vin. You only get three attempts to insert code. Disconnect battery, wait 20 minutes, then apply code. Push buttons fully and pause. Hope this helps

You need to leave the key in the ignition in position I (accessory) for two hours, after that it will say code and you can input the code. The radio switches to "OFF" after three failed attempts with the wrong code. If you dont have the code call the dealership with your VIN and they can give it to you.

This is the anti-theft device on your factory radio. When the battery died, the radio thought it had been removed from your car and went into anti-theft mode. When you turned the car back on, the radio should have read "CODE" on the display, at which point you need to enter the factory anti-theft code. After 3 failed attempts at entering the code, it will simply read "OFF" and the radio is locked.

At this point:
- find your factory anti-theft code - it should be in your owner's manual, or you can contact a dealer to retrieve it
- turn the key to the ACC position (radio and accessories on, but engine is off)
- turn on the radio so the display reads "OFF"
- let the car sit for 1 hour
- radio will turn off automatically and reset
- turn the radio on again, and it should read "CODE"
- enter the factory anti-theft code

Make sure you have the code before starting the procedure. To enter the code, use the radio preset buttons. For example, if your code is "4321", hit Preset #1 button four times, Preset #2 three times, Preset #3 two times, and Preset #4 one time. Then hit the "Tape" or "CD" button. Radio should now be unlocked.

InOP - Too many wrong code attempts have been entered and the radio must be left powered on for one hour with the battery and ignition applied before three more attempts can be made. Entering only the correct code will unlock the car radio. here's your answer . cheers

1. CODE ENTRY: The proper five digit code for the radio is listed on the two cards supplied in the radio security envelope. After installation or when the radio requires reprogramming the word "code" will appear on the display screen. Enter the code by using the preset buttons numbered 1 through 5 . If a "beep" sound occurs when the code is initially entered, it is then necessary to re-enter the code starting with the first digit. The "beep" sound was provided to indicate the starting point for code entry. If the code has not been properly entered after three successive attempts , the radio will then not accept any entry until the radio has been left "ON" for one hour (vehicle ignition must be "ON"). After one hour in the "ON" position, the radio will then accept three additional entry attempts. Also, if a push-button is touched accidentally when the ignition is "OFF", a warning tone will sound. Turn the ignition to the "ON" position and the warning tone will stop.
2. Radio security codes will not be given to anyone under any circumstance other than authorized jaguar dealer personnel after proof of vehicle ownership and proper identification has been established. A separate security envelope with the attached instruction is provided in each radio package. If the radio has been port installed, the security package will be placed in the vehicle glove box. NOTE: When the car arrives at the dealership, the radio will be in the inoperative mode even though it has already been installed. It is imperative that no attempts be made to install a tape cassette while the radio is in this mode. The cassette will not eject and damage may occur when removal is attempted.

Usually you need a dealer to unlock the NEW ones after entering 3 wrong codes but...
http://www.davidsonelectronics.co.uk/code_entry.htm

It works the same way with my car ( pontiac grand prix), I only get 3 tries and the nit locks up. Though I never had the problem, I was told that in order to get 3 more tries you have to disconnect the battery for a few hours to allow the car's computer to clear your attempts and give you another shot. If that doesn't work you'd have to go to the dealer and they have their own code (or are supposed to) which is a mian override code. Good luck!