Question about 2004 Honda Pilot

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RADIO CODE I LOST ALL POWER TO MY VEHICLE AND NOW MY RADIO SAYS I NEED A CODE TO REACTIVATE IT. I HAVE THE SERIAL # FOR THE RADIO AND THE VIN # TO MY VEHICLE

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On the driver side of your glove box you will find your code. Turn the key on, turn radio on and type in the code. This will happen everytime you lose total electricity.

Posted on Jun 08, 2008

Call a honda dealer and give them the serial # they will give you the code.... then punch it in.

Posted on May 20, 2008

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I'm hooking up this radio to a 2004 Chevy trailblazer what parts do I need


Your best bet is go to a place where they sell an install stereo systems an ask them . The factory radio on your vehicle is hooked up to the vehicles communication network . Class 2 serial data bus , if it's not done correctly the vehicle will not start an run !
The theft deterrent system is a feature on all base and uplevel radios. There is no need to program a security code into the radio as in past model years. The theft deterrent system now utilizes class 2 serial data to determine if the radio is in the appropriate vehicle. Each time the radio receives the "run" power mode message, it compares the VIN information it has stored to the VIN information received from a module on the class 2 serial data circuit responsible for transmitting that information. If a mis-match occurs, the radio display will indicate to the user the radio is locked. Once this takes place the radio will not respond to any button presses and become inoperative. The two scenarios able to cause this condition are:
?€¢
A radio is installed from another vehicle.


?€¢
A module which communicates on the class 2 serial data circuit which supplies VIN information to the radio is replaced and not properly setup with the correct VIN information for that vehicle.

The only way to unlock the radio is by using a scan tool.
The digital radio receiver utilizes class 2 serial data to determine if it is in the appropriate vehicle. Each time the digital radio receiver receives the "run" power mode message, it compares the VIN information received from the body control module (BCM) on the class 2 serial data circuit. If a mis-match occurs, the radio display will indicate to the user the digital radio receiver is locked. The digital radio receiver cannot be unlocked, it must be replaced. The two scenarios able to cause this condition are:
?€¢
A digital radio receiver is installed from another vehicle.


?€¢
The BCM is replaced and not properly setup with the correct VIN information for that vehicle.

Dec 27, 2015 | Cars & Trucks

1 Answer

Lost code radio V40


VIN doesn't matter. You need to read the serial number from radio housing. Then go to your dealer. Sometimes you'll be happy and get the code for free. Sometimes dealers charge for this. You can also try to ask some independent specialists. Anyway: the start point is serial no. of the radio.

Mar 05, 2014 | 2004 Volvo V40 Wagon

1 Answer

I need a unlock code for a 2005 gmc sierra! also i need to know how to type the code in to unlock it!!


Hello, if you are refering to the radio, there is no unlock code. the radio has to be programmed with the vin number of the vehicle that it is installed in. this requires some special tools, normally found at your dealer.

The theft deterrent system is a feature on all base and uplevel radios. There is no need to program a security code into the radio as in past model years. The theft deterrent system now utilizes class 2 serial data to determine if the radio is in the appropriate vehicle. Each time the radio receives the "run" power mode message, it compares the VIN information it has stored to the VIN information received from a module on the class 2 serial data circuit responsible for transmitting that information. If a mis-match occurs, the radio display will indicate to the user the radio is locked. Once this takes place the radio will not respond to any button presses and become inoperative. The 2 scenarios able to cause this condition are:
• A radio is installed from another vehicle. • A module which communicates on the class 2 serial data circuit which supplies VIN information to the radio is replaced and not properly setup with the correct VIN information for that vehicle. The only way to unlock the radio is by using a scan tool.

• •

Aug 15, 2011 | GMC Sierra Cars & Trucks

1 Answer

Unlock radio need code to lock radio mufflerman08@yahoo.com


Your '02 is too new to unlock on your own.

There are 2 types of GM Theftlock, Theftlock I and Theftlock II. The Theftlock I is found in pre 2000 vehicles, and Theftlock II is in the later models.


Theftlock I - Uses a volatile user settable code that is input through the key pad on the front of the Radio. If the power is lost (dead battery etc.) the code is gone and must be re-entered for the radio to work. But with the correct procedure the owner can unlock it.

Theftlock II - Uses an EPROM (erasable/programmable read only memory) or a PROM (the difference is you can not alter the prom once it is programmed).

In either case the code is burned in and holds even when the power is lost. With Theftlock II the radio is married to the vehicle by way of the VIN. When the vehicle is started the computer compares the number in the radio with the VIN in the body control module. If they match, the radio works, if not the radio displays LOC and you are finished, there is no easy way around it. The radio will not work until you make a trip to the dealer.


The dealer will use a TECH 2 scanner to change the VIN stored in the radio. The radio does not need to be removed (for the serial number or any other nonsense). The technician just plugs into the computer and resets the VIN in the radio.

Thank you for using Fixya and you may want to try pulling the fuse to your radio for 2 min and then reinstalling it. This may reset your radio and have the ECM recognize the radio matching VIN number to the Trailbalzer.

Jul 15, 2010 | 2002 Chevrolet TrailBlazer

1 Answer

I need a radio code to unlock gm part 10356164


Your '05 is too new to unlock on your own.

There are 2 types of GM Theftlock, Theftlock I and Theftlock II. The Theftlock I is found in pre 2000 vehicles, and Theftlock II is in the later models.


Theftlock I - Uses a volatile user settable code that is input through the key pad on the front of the Radio. If the power is lost (dead battery etc.) the code is gone and must be re-entered for the radio to work. But with the correct procedure the owner can unlock it.

Theftlock II - Uses an EPROM (erasable/programmable read only memory) or a PROM (the difference is you can not alter the prom once it is programmed).

In either case the code is burned in and holds even when the power is lost. With Theftlock II the radio is married to the vehicle by way of the VIN. When the vehicle is started the computer compares the number in the radio with the VIN in the body control module. If they match, the radio works, if not the radio displays LOC and you are finished, there is no easy way around it. The radio will not work until you make a trip to the dealer.

The dealer will use a TECH 2 scanner to change the VIN stored in the radio. The radio does not need to be removed (for the serial number or any other nonsense). The technician just plugs into the computer and resets the VIN in the radio.

Thank you for using fixya and keep us posted.

Jul 10, 2010 | 2005 GMC Yukon

1 Answer

I NEED TO UNLOCK MY STERO IN A 2004 TAHOE


There is no actual "security code" in the radio as in past model years. The newer theft deterrent system utilizes the class 2 serial data to determine if the radio is in the appropriate vehicle...in other words it compares the VIN it has stored in it's memory with the VIN of the other modules (body control and PCM) in the vehicle to "check" to see that it's in the correct vehicle.

Each time the radio receives the "run" power mode message, it compares the VIN information it has stored to the VIN information received from a module on the class 2 serial data circuit responsible for transmitting that information. If a mis-match occurs, the radio display will indicate to the user the radio is locked. Once this takes place the radio will not respond to any buttons/commands and becomes inoperative. But the dealer can reestablish the radio into a different vehicle with a scanner.

There are 2 types of GM Theftlock, Theftlock I and Theftlock II. The Theftlock I is found in pre 2000 vehicles, and Theftlock II is in the later models.


Theftlock I - Uses a volatile user settable code that is input through the key pad on the front of the Radio. If the power is lost (dead battery etc.) the code is gone and must be re-entered for the radio to work. But with the correct procedure the owner can unlock it.

Theftlock II - Uses an EPROM (erasable/programmable read only memory) or a PROM (the difference is you can not alter the prom once it is programmed).

In either case the code is burned in and holds even when the power is lost. With Theftlock II the radio is married to the vehicle by way of the VIN. When the vehicle is started the computer compares the number in the radio with the VIN in the body control module. If they match, the radio works, if not the radio displays LOC and you are finished, there is no easy way around it. The radio will not work until you make a trip to the dealer.

The dealer will use a TECH 2 scanner to change the VIN stored in the radio. The radio does not need to be removed (for the serial number or any other nonsense). The technician just plugs into the computer and resets the VIN in the radio.

Thank you for using fixya and good luck. you might get luck by removing the fuse toy our radio for 5 min and reinstalling it, this will reset the radio to default and all you need to do is reset the clock and radio presets.

Jun 15, 2010 | 2004 Chevrolet Tahoe

1 Answer

Could you please help, i have a 1997 escort. i changed the battery & found i had lost the radio code. the serial number is... M298338 Please help.


need to notify dealer radio codes are part of vehicle security most dealers dont charge for code but will need radio number ,vin number and usually are asked to come in with id

Jan 22, 2010 | 1999 Ford Escort

1 Answer

I want to extract my radio code before i remove the old battery and replace it on my 2004 Grand Prix.


The "Theftlock" theft deterrent system is a feature on all base and uplevel radios. There is no need to
program a security code into the radio as in past model years. The theft deterrent system now utilizes
class 2 serial data to determine if the radio is in the appropriate vehicle. Each time the radio receives
the "run" power mode message, it compares the VIN information it has stored to the VIN information
received from a module on the class 2 serial data circuit responsible for transmitting that information.
If a mis-match occurs, the radio display will indicate to the user the radio is locked. Once this takes
place, a DTC will set, the radio will not respond to any button presses and become inoperative. The
two scenarios able to cause this condition are:

  • A radio is installed from another vehicle.
  • A module which communicates on the class 2 serial data circuit which supplies VIN information to the radio is replaced and not properly setup with the correct VIN information for that vehicle.


SOURCE: MITCHELL1

Jan 13, 2010 | 2004 Pontiac Grand Prix

1 Answer

I installed a new battery in my 2004 Pasatt. Now


Your radio is probably showing up SAFE in the display because you disconnected the power supply. On this particular vehicle you have to re enter a security code to get the radio to work again.

You may find you have this security code somewhere in your service documentation or owners manuals if you have them. From the factory it is printed on a small card which often gets lost as the vehicle changes hands.

If you have lost thos code you can only obtain the code from a dealer by

1) Removing the stereo and getting the serial no that is stamped or printed on the back of it

2) Bringing this serial along with your cars VIN identifier (Chassis no) to a VW dealer who will run the numbers and give you the code you need to unlock the stereo.

Hope this helps.

Don't forget to rate my answer.

Jul 04, 2009 | 2003 Volkswagen Passat

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