Hyundai Santa Fe Alarm Chirp Modification
(for pre-2004 models)

Installer: twospirits
Testers: twospirits
Part supplier: DEI (Directed Electronics Inc, California
Author, Images: twospirits, HMA
Technical assistant: southpawboston

Introduction / History

The Hyundai Santa Fe's sold before the 2004 model year are supplied with a factory installed alarm that does not include an audible chirp. This left the owners to arm their vehicles and make certain the alarm was set by turning their heads to see if the headlights flashed. Hyundai eventually incorporated the audible chirp capability in some 2003 models and in all 2004s. Pre-2004 owners were left with only the possibility of buying expensive aftermarket alarm systems that either had the owner forgo the use of their stock FOB (transmitter) or use an additional transmitter. This modification takes care of this oversight by allowing those owners to use their existing FOB (transmitter) and get an audible chirp when arming or disarming the vehicle.

Special thanks go out to Santa Fe Forum/Elantra GT Club member southpawboston which me find the unit and identify the proper connections.


Please Read the disclaimer before proceeding

Difficulty level / scale: On a scale of 1 - 10

Easy   Difficult
1 2 3 4 5 6 7 8 9 10

Tools and materials needed:

The DEI D528T pulse timer module.
This unit was bought from Dr. Detail Shop. It retails for $29.99 US Dollars.

The box it came in.

 Outside of the box  
Main items 
The DEI D528T pulse timer module.
Philips screwdriver
10mm Socket wrench with extension
2 Blue Butt Connector
Electrical tape

flat head screwdriver
additional electrical wire (any color)
Door Trim Removal tool
1 or 2 nylon snap ties

Time to install item:

Total time for mod: 30-90 min  

Necessary pre-mod / install steps.

Before any modification / installation,

1- Write down any pre-set radio stations you have set your radio too.
2- Then disconnect the negative battery.

3- Place the drivers side seat as far back as possible.

Removing the necessary panel covers.

Raise the steering wheel to it up most position.
Remove the 3 screws from the left lower crash pad panel using a Philips screwdriver.

Gently but firmly unclip the crash pad panel by pulling it towards you.
Be careful as the Rheostat M11 switch will still be connected to the Rheostat and you will need to unplug it during the panel removal.

  Remove the drivers side floor sill cover.
Note This is a peg and is a bit hard to take out. Carefully use a flat head screwdriver or a door trim removal tool to gently pop it out.:
    Remove the lower left side panel.

Identifying the connectors you will be working with.

M02 hazard Relay

With the lower left side panel removed, you will see the M02 Hazard Relay along with the M01 Chime Bell.
  Remove the bolt holding the M02 Hazard Relay to the chassis.
    Pull back on the electrical tape that covers the wires of the M02 Hazard Relay to expose the wires. You will be working with the green wire.

EM04 Joint Connector

The EM04 Joint connector is located to the right of the Passenger Compartment Junction Box (PCJB).
  Optional Step:
Access to the connector is a bit tight since there is a metal crossbar in front of it. You can get to it but if you feel that there is not enough room for you to work with then you can take out the metal crossbar by removing the 5 bolts. (I left it attached).
The EM04 joint connector consists of both a male and female connector, which is not so easily apparent as to what gender it is. The female connector is the one that can be unclipped and fits inside the male connector.
Note: Its not the shape of the connector that determines the gender but the connector pin.
You will be working with the female side of the connector and its the only one that can be detached. The male side stays connected to the Passenger Compartment Junction Box. 
Disconnect the EM04 Joint connector, (female side). You will notice that it has 22 pins/wires that lead to/from it. Depending on your model not all wires will be available.
 You will be working with the Pin # 22 Red wire and the Pin #21 White wire.

Familiarizing yourself with the D528T Pulse Timer module.

The DEI D528T Pulse Timer is an adjustable timer with a built in 30A relay. It allows you to disconnect a circuit for a certain amount of time. It has 7 wires leading from it and on the unit itself has an adjustable rotary switch to adjust the timing sequence of the incoming pulse.
    The module comes with generic instructions, which are not to be followed for this modification. I am providing the original instructions so you can see what it looks like.

With help from fellow Santa Fe Forum member southpawboston, we were able to come up with the correct way of hooking up the module. (see below)


Connecting the D528T Pulse Timer.

  The DEI D528T Pulse Timer has 7 wires. Which are as follows...
  Color  Connect to  Wire Color Connector
  Black w/ white Stripe Pin # 2 Green wire M02 Hazard Relay
  Red Pin # 22 Red wire EM04 Connector
  Brown Pin # 21 White wire EM04 Connector
  Black Ground   G07 Ground point
  Yellow Ground   G07 Ground point
  Orange Not used    
  Blue Not used    
  Connect the Black w/ white stripe wire from the D528T to the M02 Hazard Relay Pin # 2 Green wire using a blue butt connector.
    Connect both the Black and Yellow wires from the D528T to the G07 Ground Point that is near to the M02 Hazard Relay.
    Using the EM04 diagram above locate the Pin # 22 Red (thick) wire of the EM04 female connector and connect the Red wire from the D528T to it using a blue butt connector.

Connect the Brown wire from the D528T to the EM04 Pin # 21 (White wire) also with a blue butt connector.

The orange wire should be taped up and electrically secured.  The Blue wire is left alone since we are working with a (-) negative system.

Reattach the EM04 female connector into the male connector. (This is very important that you do not forget this step).

Adjusting the timer.

    As mentioned earlier, the D528T Pulse Timer has a built in adjustable rotary switch that allows you to set the timing sequence to disconnect a circuit a certain amount of time. I turned the switch counter clockwise using a flat head screwdriver to the left most position which should be position # 1. 

Note: In the testing trials, the only suitable setting for the chirp timer was at the lowest # 1 setting. Anything over that would have the siren go off as normal. So trust me leave it at the lowest setting. You can play with it later.

Testing the D528T Pulse Timer.

At this point, make sure that you reattached the EM04 female connector to its male counterpart. Leave the D528T on the floor of the cabin, close all open doors. Reattached the battery and test the D528 Pulse Timer using your FOB (remote transmitter).
You should notice the following...
When Arming the vehicle, you should now hear two chirps and the lights flash twice.
When disarming the vehicle, you should now hear one chirp with on flash of the lights.

If you do not hear any chirp then recheck your connections. If you hear the siren then you set the rotary timer switch incorrectly.

If you hear the chirps, congratulations. At this point you may want to play with the rotary switch, but trust me you will hear the regular siren if it is not set to the lowest setting.

Notes on the Chirps.

Aside from setting the timer to the lowest setting possible to hear a chirp as mentioned above, the sound that is produced is just like any other alarm chirp you hear from other vehicles except that instead of the usual .05 of a second chirp, it is a bit longer like .75 of a second. Not that much of a difference but noticeable if you really pay attention. Either way it is still a recognizable chirp, it works and you no longer have to turn your head to determine if your alarm has been set.

Securing the D528T Pulse Timer.

    At this point, knowing that the Pulse Timer works, you can wrap up the project by securing the loose wires by wrapping them up in electrical tape if desired and secure the module in a place that will be from normal view. I chose to place it at the back of the drivers foot area up where the clutch would have been if my Santa FE had a manual clutch on the firewall using a screw.

Final wrap up.

At this point, you can start putting back the lower crash pad and door sill panels covers in reverse order as mentioned above in the section "Removing the Necessary Panel Covers". Re-connect the battery and reset your radio setting.

Enjoy your new alarm chirp

This site was last updated 02/08/06