Avital 4103, 2008 TrailBlazer

I am attempting my first D2D R/S install. I have an Avital 4103 that I will be using on a 2008 TrailBlazer with a FORTIN INT-SL+. The Avital did NOT include a D2D cable, and the one included with the FORTIN will not fit the Avital harness. Shouldn't the Avital include a D2D cable? My other question is, if the Avital cable's other end doesn't fit the FORTIN can the 2 be spliced together? I thought the D2D connections were all standard/interchangeable.

There are actually three D2D protocols.  Fortin, iDatalink and DEI each have their own different D2D protocol and they are not interchangeable.

While some of the newer Fortin bypass modules ( EVO- series ) allow D2D protocol selection ( between Fortin, iDatalink and DBI ), I believe the older series do not have this option and therefore don't supply the DBI D2D harness.  As such, your INT-SL+ will have to connected in W2W mode with the Avital 4103 unit.

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Soldering is fun!

Thanks for the reply! I ended up getting a DBALL module and successfully programmed it. Unfortunately, the truck is not starting with the remote starter. Should I start a new thread specifically for this issue or can I use this one?

Just continue this thread.  Re-state the basic info : 2008 Trailblazer with Avital 4103 and DB-ALL flashed with xxx firmware, then your specific issue.

As a shot in the dark, did you do the 4103 BitWriter port to DBI D2D port change-over procedure?

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Soldering is fun!

Thanks Kreg.

To answer your question, I believe I did, perhaps my description will answer that better.

2008 6cyl TrailBlazer Avital 4103 using D2D, GM1 - DBALL2 flashed with 1.09 firmware

I am pretty sure I have everything connected properly I will provide my wiring towards the bottom.

The issue I am having is the Avital key fobs do NOTHING. No lock, no unlock no start.

The only wire I have connected on the DBALL2 is the Violet / YELLOW to pin2 of the OBD connected. I followed the instructions (twice) when programming the DBALL2.
1. Plugged in the 14pin harness, held the programming button, plugged in the D2D wire. The LED went orange, I released, it went red.
2. I turned the key to the on position, the LED went solid green for 3 seconds and went off.
3.Removed Key.

Tested key fobs. Nothing. I then proceeded to do the TachLearning which resulted in what appeared to be a successful learn. Still no remote starter, or unlock/door. Touched the activation input wire to ground, interior lights went on. Touched it again, the truck started up. Which (I believe) tells me my wiring is corrected. I can't figure out why the key fobs aren't working.

To answer your question about D2D and BitWriter. That's why I touched the activation input to ground. I wasn't expecting it to start the truck. So I am not sure if it's in D2D now or not because it did something I wasn't expecting.

Sorry, I forgot to add my wiring.

Primary Harness
H1/8 Ground
H1/9 parking lights

Remote Start
1 Red - Red @ ignition
2 Pink/White - White @ ignition
3 Red - RED / White @ ignition
4 Orange - Orange @ ignition
5 - not connected
6 - Pink - Pink @ ignition

Door Lock
Not used

Remote Start
H2/1 ground
H2/2 white tach wire
H2/3 white brake wire
H2/4 hoodpin ground

Other thing I noticed is that nothing says to connect the horn. I get no honking. Should I just connect it to the starter even though the DBALL says nothing about it?

A few thoughts...

1. The Hood pin wire ( H2/4 ) should not be grounded.  It interprets a ground input as the hood being open and
     should prevent a remote start.
2. Try this to switch the ESP / D2D port over to D2D mode.
     To use as D2D mode follow the below steps:
     1. Remove all power from the Avital R/S brain.  ( Pull the two fuses.)
     2. Make sure Avital's WHITE/ Blue activation wire is grounded.
     3. Power the unit up. The system LED flashes for 5 seconds to confirm D2D mode change.
     4. Remove the WHITE/ Blue wire from ground.  ( Do this cleanly, without pulsing the WHITE/ Blue wire.)
3.  Is the antenna plugged in completely to the port next to the door lock connector?
4.  Perhaps the remotes are not paired with the control unit.  The Parking Lights should flash with a Lock or Unlock.
5.  The DB-ALL does not control the horn.  You will have to make that connection directly from the Avital to the Trailblazer.
        

 

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Soldering is fun!

Kreg. Here is an update and thank you again for the reply. The antenna was NOT plugged in. I figured since I was literally within 1 ft of the box when hitting the buttons it would work. Stupid rookie mistake. I plugged in the antenna and everything worked as it is supposed to. Even the parking lights (without being connected.)

I did however notice that the truck starts immediately. I saw a few other posts about the brown wire needing to be energized. My only question is. How? I have no more wires to connect.

Also, I did connect the horn and I am still searching for the white tach wire. I tried testing with my voltmeter but it's reading 6V when running and only fluctuates .6. Hoping I have it connected properly. black lead to ground and red to the white wire.

Other than that I am in pretty good shape. I went into the Features mode of the DBALL and changed the heater seat options.

Update. Scratch that. The parking lights didn't work. Only with the lock/unlock, not with the remote start. Had to connect those.

If you are referring to the thick Brown ACC2 wire in the Trailblazers ignition harness, it may or may not
need to be powered during a remote start.  Not sure exactly what circuits it controls.  Basically, if the engine
starts, there are no CEL's and the heat / AC & fan work work OK, you don't need the Brown ACC2 wire.
If you need or want it, there is a way to power it.  You will need an automotive Bosch style 30/40 Amp SPDT
relay with harness and a fuse holder with 25 amp fuse.  Wire as follows :
Relay Pin 85 to Avital 4103 4-pin satellite harness Pin 2  ORANGE  (-) ACCESSORY OUTPUT
Relay Pin 86 & 87 to +12V constant through fuse
Relay Pin 30 to Trailblazer Brown ACC2 wire
Relay Pin 87a not used - insulate

That is probably the White Tach wire.  You are only checking AC voltage when it's the actual frequency that
counts.  The 4103 only monitors this input with a high input impedance circuit, so no harm in connecting to
this wire and trying a Tach Learn.  If you get the successful response, then you are all set.

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Soldering is fun!

Yes, I was referring to the thick brown wire. Everything works once it starts. Heat/AC, heated seats, no CEL's so I'll let it ride. Thanks for all of your help!

kreg357 wrote:

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If you are referring to the thick Brown ACC2 wire in the Trailblazers ignition harness, it may or may not
need to be powered during a remote start.  Not sure exactly what circuits it controls. 

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Brown Accy2 wire: Hot in RUN and ACCY

For the following Rear Fuse Block circuits
#29 Rain Sensor
#35 Transmission Control Module
#33 Front Wiper
#31 "TBC ACC" goes to BCM.

Probably does not need to be energized with RS.

Thanks for the clarification Dave.

Something new is happening now and I'm not sure what changed. If I start the truck with the remote after I lock the doors and arm the truck the alarm goes off when it starts. I can unlock it first and then start it with no issues but I was able to start it armed last night. I think the last wire I tapped into was the tach wire. Any thoughts on what could be triggering this?

Factory alarm?

If the avital is being set off, what do you have hooked up to the trigger/sensor inputs and what zone does the avital indicate as being triggered?

catback wrote:

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Factory alarm?

If the avital is being set off, what do you have hooked up to the trigger/sensor inputs and what zone does the avital indicate as being triggered?

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Yes, factory alarm. The 4103 is a remote starter only, no alarm.

Here is the final update. Not sure what the deal was with the alarm going off yesterday but when I got home I double checked all my wires, did another tach relearn and tested it again. The alarm is no longer going off when the truck starts. Tested it locked, unlocked, windows open etc.. everything is working perfectly. Thanks again for all of your help!