Printer Friendly Forum Posts - jeep gc viper 4806v not cranking

I've installed a Viper 4806V with idatalink ADS-AL ca within my 2000 Jeep Grand Cherokee. Units connected via data mode. Door locks work and remote start activates but does not crank the engine. I followed the idatalink type 1 install with vehicle wiring chart from diretechs.com for the Jeep.

I've reset/reprogrammed the idatalink a couple times and the Viper is set to Virtual Tach.

If I put the key in the ignition it will not start but if I turn the key to the on position it will start.

Anyone have some other things I can check/test?

Sound like you are missing an ignition wire. Here is a link to a Pictorial on your Jeep :
https://www.the12volt.com/installbay/forum_posts.asp?tid=137527

Double check and verify that you have all the Vipers +12V input wires ( Red, Red, RED / White, RED / Black ) connected to a
+12V constant source.

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Should they all be to constant +12V? I have Red, Red hooked to Red constant +12V on ignition harness and RED / Black hooked to pink/black in ignition harness.

I didn't think I need RED / white hooked up as I don't have a second ignition and am not hooking up any other accessories.

Thanks for the tip. Connecting all four to constant +12V got me further.

It will now crank but it doesn't actually start.

I changed the cranking time a couple times. Once it was at 4 seconds it would start for about a second and then shut off. It wouldn't start until the dash lit up. Just after the dash lit up it shut down. This is weird!!!

Hold the key up to the ignition switch and see if it starts.

Did you program the ADS AL-CA with the DBI AL(DL) CH6 firmware?

Did you set the Installation Mode to Data ( one blink ) and lock it in?

Did the ADS AL-CA program as per the install guide?

And why didn't you connect the Jeeps' ACC2 wire to the Vipers Pink/White and make the programming change to ACC2? It's there, it's free and it's only one more connection. posted_image

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Soldering is fun!

Holding the key up ignition works.

Programmed with CH6 firmware at an authorized dealer.

Install mode is Data and confirmed on idatalink device.

Didn't know about the ACC2 wire. From what I read and the dealer told me it wasn't needed.

Once I hooked up Pink/White wire it all seems to work now!!

Now to solder all the connections and button it all up.

Thanks a ton for your help!!

On the 1999-2004 Grand Cherokee, my experience is the following:

If there are no OEM heated seats, I never hook up the second accessory wire. That way, the radio stays quiet during remote start.

On the other hand, if there are OEM heated seats, other installers have told me that the second accessory must be powered, and that it must be powered as an accessory---if the installer leaves it set as Ignition 2 in the remote starter's programming, the heated seats won't work during remote start.

I never did get to test out this theory by leaving the wire unpowered. When I did more of these cars when they were new, it was often for a car dealer I didn't go to often, so I just did it the way the usual installer for that dealer did it.

I have the very base model, including a cassette tape stereo) so the only accessory I could run is the rear defrost, which I could hook up. I'm just happy it is working right now.

The only thing I don't like is how long it takes to start. Is it normal to have to change the cranking time to 3-4 seconds?

The ADS AL-CA bypass module supplies a Tach signal to the Viper via D2D. Try setting the Viper to Engine Checking = Tach and do a Tach Learn. See if that helps.

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Soldering is fun!

I'll give that a shot and report back.

It's weird though as the car starts cranking but doesn't start until the dashboard cluster lights up. It takes the dashboard almost 3 seconds to light up though and then it starts right away.

I tried making that change but it didn't work. It changed the cranking time back to .4 seconds and doesn't even fire. Dashboard lights come on well after it stops.

When I changed it back now it starts and then shuts down. If I put my key next to the ignition it all works and will work for the next 2-3 remote starts. It then starts and stops after a second or two.

I think I have two issues:
1: time it takes for the system to turn the ignition on
2: idatalink not keeping the key signal for the key bypass to work properly.

Strange issue. I do these all the time with iDatalink ADS DL's with CH6 firmware and it works well. I don't use much Viper stuff and the last
few I did were with Audiovox APS57c and APS57e remote starters in DBI D2D mode. You might try switching over to W2W to see if that
resolves the transponder issue. Not sure why the Viper is taking so long to bring up the ignition circuits.

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Soldering is fun!

you might have turned your ignition into an acc wire, which would cause a delay in your cluster turning on.

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Ted
2nd Year Tier 1 Medical School
Still installing as a hobby...pays for groceries
Compustar Expert

I've gone back through all of the wiring and everything checks out. I then pulled the ADS-ALCA out, re-flashed it with CH6 firmware (after buying the cable and setting up and account).

Once I plugged it back in, programmed for my Jeep (LED turned solid red, then green, then off), and tested functionality. I got the following results:
1 - Door locks didn't work
2 - Remote start sequence worked, Jeep started, then shut down afer 1 second
3 - SmartKey light was flashing. If I held the key up to the ignition it would start and stay running.
4 - Brake takeover did not work.

I'm using the ADS-AL(DL)-CH6 (2.0) firmware and verified via the "Configure My Module" tab that door lock and brake pedal features are enabled.

This really shouldn't be this hard and I appreciate all of your help.

Just to reiterate my previous statements :
Did you program the ADS AL-CA with the DBI AL(DL) CH6 firmware?
Did you set the Installation Mode to Data ( one blink ) and lock it in?

When to flash your ADS AL-CA module, you must choose the DBI flavor of firmware. This is the D2D communications mode
that the Viper needs. Using the standard 2-way iDatalink ( ADS ) protocol won't work and will give the symptoms you mentioned.

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Soldering is fun!

I can't believe I missed that on the flash page. I was doing idatalink 2-way but should have seen the DBI option with the red-end of the cable that goes into the Viper.

I flashed with the DBI version and now I'm right back to where I was before.

If I take the ADS out the Viper starts the system fine, except SmartKey bypass. If I have the AD plugged in the starter engages for 2 seconds, turns off, and then one second later the dash lights up.

kreg357, what do you mean by "switching over to W2W?"

Not sure if W2W will help for your issue. You should be able to unplug the ADS AL-CA module ( all harnesses except Blue 3 Pin ),
hold a working ignition key next to the ignition switch and remote start the Jeep in Virtual Tach Mode. Of course, the locks won't
work and you won't have the Brake signal for a Brake shutdown or key-take-over.

Anyway, going W2W would be :
1. Unplugging and removing the ADS to DEI D2D cable.
2. Cutting the standard ADS D2D harness and making these connections :
      Red to +12V
      Black to Chassis Ground
      Blue/White to Viper Blue (-) Status Output
3. Doing a Factory Reset on the ADS AL-CA and selecting Standard Mode ( two blinks ) for the Installation Mode. ( No need to re-flash w/W2W.)
4. Hard wiring all the necessary dashed Red lines between the ADS AL-CA and the Viper. Install Guide # 6083 - Type 1.
5. Doing the ADS AL-CA to vehicle programming.

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Soldering is fun!