Connect with us

How to test Remote Key Transmitter?

Discussion in 'General Electronics Discussion' started by Z2TT, Jul 6, 2009.

Scroll to continue with content
  1. Z2TT

    Z2TT

    4
    0
    Jul 6, 2009
    Hello,

    The remote central locking my car has not been working. There are 2 main components. The reciever unit which is located in the trunk and the transponder unit which is on the key. The reciever unit recieves the signal and then sends a voltage through the wires to the door lock solenoids to lock/unlock.

    The Key transmits the signal to the reciever unit. Both the key and the receiver unit are equipped with a ROM chip that has an identical code.

    I know that there is no severed wires from the reciever unit to the door locks as I can manually lock/unlock the door by shorting the pins out on the connector.

    I bought a replacement reciever unit off ebay supposed to be working and still did not solve the problem. At this point I am suspecting it's the transmitter on the key so I began to test that.

    When I pressed the button it draws voltage from the battery in it, so this demonstrates that something works inside the circuit, but I am not sure that the signal is being transmitted. How would I test if the signal is being transmitted?

    I don't know the frequency, but I think it should be around 300 or 400mhz as this is the frequency these devices commonly operate on.

    Any suggestions would be great. Thanks.
     
  2. selvaganeshi

    selvaganeshi

    3
    0
    Jul 8, 2009
    to test your IR remote use the following circuit

    electronicseveryday.blogspot.com/2009/06/ir-remote-tester.html
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-