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AVIC-N1 technical menu To access technical menu in Pioneer navigation AVIC-N1 you have to follow these instructions: To access it you have to hold RESET and EJECT...release RESET but hold EJECT You will see following screen: You have to enter the code with the joystick button: up, right, up, right, down, right, down, right, OK (press joystick button).
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..a password screen then appears (but you don’t have to input any password)!! And after several seconds this main technical menu appears. (use joystick to navigate between screens):...
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Go into those submenus and first clear out the memory. Go to file maintenance menu: Format all the areas and clear all memory. You'll find options for this under those submenus.
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Choose format drive sub-menu: I.E..clear backup menu, format SRAM..etc. Go ahead and clear all memory areas you turn up. I did with no ill effects other than starting my unit off completely fresh.
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Then you will need to go into the Program Force Write menu (from main 3 menus): At this step you have to insert your original CNDV-40MT disk. Choose “force write” for: 1. System program 2. GPS program 3. Application program...
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With your 40 version disc inserted into the drive..forces write all the old software versions. Depending on your current CNDV-50MT version of software on your navigation system, you may see a different picture than you see below:...
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Congratulation! Your system now back to original CNDV-40MT software. Press “reset” button on you navigation and you are done.