Viper 791xv Alarm Trouble - SRT Forums

CrEaTrE · 05-21-2008, 04:55 PM

I just recently purchased my car with the 791xv alarm installed in it. I found the previous owners thread that had questions about the install and I'm hoping that will help solve the issue (thread at the bottom).

Here's the problem: The Key FOB will not lock the car, roll up the windows, or remote start the vehicle. It will however, pop the trunk. The remote shows an outgoing signal and incoming signals from the Viper box itself. All fuses seem to be good to go. So basically I'm left locking the car using the button in the interior and no alarm activated. Anyone have any ideas of where to look or anyone have similar problems? I've been looking at the install and it's fairly clean, but all the wiring is quite overwhelming when I didn't install it myself.

Viper 791xv

**stage3matt** · 05-21-2008, 09:19 PM

will it unlock the car?
is there a hood pin installed under the hood or some sort of kill switch?
where did you "see" the install?
do you know where your LED is?/is it lit up?

My first guess is that the remote shit the bed. Even if there was a wiring issue, the brain of the alarm r/s would still be arming the vehicle if receiving the signal from the remote itself.

The only other situation coming to mind would be that the car is in 'Valet Mode' (characterized by the LED being on solid) and there is also a problem with the door lock wires. I would assume the previous owner went to the drivers kick for locks and the like. You should be looking for a Lt. Green wire with either two relays, a DEI 451M module, or two wires hooked into it. Doorlocks in our cars are a negative multiplex, the lt. green has to see 250 ohms to unlock and I believe 1k ohms to lock the car.

CrEaTrE · 05-21-2008, 09:28 PM

Quote: Originally Posted by stage3matt

will it unlock the car?
is there a hood pin installed under the hood or some sort of kill switch?
where did you "see" the install?
do you know where your LED is?/is it lit up?

My first guess is that the remote shit the bed. Even if there was a wiring issue, the brain of the alarm r/s would still be arming the vehicle if receiving the signal from the remote itself.

The only other situation coming to mind would be that the car is in 'Valet Mode' (characterized by the LED being on solid) and there is also a problem with the door lock wires. I would assume the previous owner went to the drivers kick for locks and the like. You should be looking for a Lt. Green wire with either two relays, a DEI 451M module, or two wires hooked into it. Doorlocks in our cars are a negative multiplex, the lt. green has to see 250 ohms to unlock and I believe 1k ohms to lock the car.

All of the information for the install is in the thread I posted in my original post. He says,
"513T
514T (extra cautious)
520T
529T
530T
555C"

I just have the console out and have been tracing the wires and stuff (to "see" the install). Checked valet mode, and it wasn't that. The reason I don't think its the remote is because it still pops the trunk? And the screen says it is transmitting and receiving from the brains. Checked OEM key FOB and it unlocks and locks the car, however no alarm (can open door from inside while locked and no response). I checked all the fuses and all the wiring seems to be okay (including the grounds). I'm really stumped because nothing else seems to be affected. Is it possible the remote is bad even though it still pops the trunk and is talking to the brain?

Car does not lock/unlock/remote start/turbo time it does however pop the trunk via remote. LED was only lit up when I tested valet mode.

**stage3matt** · 05-21-2008, 09:36 PM

the only thing pointing me to that is because even if there was a wiring/install issue, the car should still respond and 'arm' when you hit lock if it is receiving the signal on that channel.

do you know where the valet button is located?

Try reprogramming the remote to the car.

Key to "on"
press valet button once then hold
while holding valet button press lock on the remote

if the system responds with 2 short chirps of the siren then it has been programmed and at that point you can release the valet button and turn the key to off.

once that's done try it again and let me know what happens.

CrEaTrE · 05-21-2008, 09:49 PM

Quote: Originally Posted by stage3matt

the only thing pointing me to that is because even if there was a wiring/install issue, the car should still respond and 'arm' when you hit lock if it is receiving the signal on that channel.

do you know where the valet button is located?

Try reprogramming the remote to the car.

Key to "on"
press valet button once then hold
while holding valet button press lock on the remote

if the system responds with 2 short chirps of the siren then it has been programmed and at that point you can release the valet button and turn the key to off.

once that's done try it again and let me know what happens.

Okay just did what you said. It 2 chirped the siren (very loudly in a closed garage I might add) and so I pulled the key. Tried everything again and trunk pop still works but remote start/lock/unlock does not work. LED also blinked like it was armed right before the 2 chirps.

04ebluenb · 05-21-2008, 11:53 PM

Reprogram the remote

with the viper alarms you can custom program each button such as:

Lock = Aux
Unlock = Arm
etc.

Viper - Owner's Guides

Go there. Pick your alarm model. Download the PDF file for the owners manual. Reprogram your remote.

CrEaTrE · 05-22-2008, 01:16 AM

Quote: Originally Posted by 04ebluenb

Reprogram the remote

with the viper alarms you can custom program each button such as:

Lock = Aux
Unlock = Arm
etc.

Viper - Owner's Guides

Go there. Pick your alarm model. Download the PDF file for the owners manual. Reprogram your remote.

I've been staring at the PDF all night my friend. This is all I can find on programming the remote:

Programming options control your system's normal, operational
set-up. Most options do not require additional parts, but some
may require installation labor.
The following is a list of the programmable options.

➤ Active arming (transmitter only) or passive arming (automatic
arming 30 seconds after the last door has been closed).

➤ Arming/disarming siren chirps on or off.

➤ The ignition controlled door lock feature on or off: When
this feature is programmed on, the doors will lock three
seconds after the ignition is turned on, and unlock when the
ignition is turned off. If your installer is programming the
security system with the Directed Bitwriter, ignition lock
note: When page mode is Off, Warn Aways® and alarms
will not be displayed or notified on the remote until a
button on the remote has been pressed.

➤ Passive door locking (with passive arming) or active door
locking (only when arming with the transmitter). Passive
locking allows the vehicle's doors to lock when the security
system passively arms (after the 30-second countdown).
This feature only works if passive arming has been
programmed.

➤ Panic mode enabled/disabled when the ignition is turned on.
(Some states have laws against sirens sounding in moving cars.)

➤ Forced passive arming on or off. If your security system is
programmed for passive arming and the forced passive
arming feature has been programmed on, the system will
passively arm after one hour, even if a protected entry has
been left open. Forced passive arming ensures that the
system will be armed if a door has accidentally been left ajar
when leaving the vehicle.

➤ Full trigger response 30 or 60 seconds: This determines how
long the full triggered sequence lasts. Some states have laws
regulating how long a security system can sound before it is
considered a nuisance. If your installer is programming the
security system with the Directed Bitwriter®, the full trignote:
When the system passively arms after one hour, the
entry point that has been left open, and anything connected
to the same zone, is bypassed and cannot trigger
the system. However, the remaining inputs to the system
are fully operational.

➤ Automatic Engine Disable (AED) on or off. The purpose of
this feature is to protect the vehicle from being stolen at all
times, regardless of whether or not the alarm is armed. If
AED is programmed on, the starter of the vehicle will be
disabled 30 seconds after the ignition is turned off. Once the
key is turned off, the LED will flash slowly (one-half its
normal armed rate) to indicate the AED arming cycle. Thirty
seconds later, the starter will be disabled. To start the car, it
will be necessary to disarm the system with the transmitter.
It is also possible to disarm the AED feature by turning the
ignition key to the RUN position and pressing the Valet
button the programmed number of times. AED is also
disabled when the system is in Valet mode.

➤ Siren tones and chirp volume. The output of the Revenger™
Soft Chirp™ siren consists of six different tones in sequence.
Any of these tones can be eliminated by a dealer, resulting in a
unique, easily identifiable siren sound. The chirps can be either
full volume or 6 decibels quieter than the full alarm blast.

➤ 12, 24, or 60 minute run time. your system can be
programmed to allow the vehicle to run for 12, 24, or 60
minutes when remote started. Can be set up to minute increments
by your installer.
note: This feature will only function if the FailSafe®
Starter Kill relay has been installed.

➤ 3, 6, 9, or 12 minute timer mode run time. Your system can
be programmed to allow the vehicle to run for 3, 6, 9, or 12
minutes when remote started in timer mode. Can be set up
to 16 minutes by your installer.

➤ While the remote start system is running the engine, the
parking lights of the vehicle can flash on and off or come on
and light steadily.

➤ Comfort closure is a programming option which closes the
vehicle’s windows after remote locking.

**stage3matt** · 05-22-2008, 07:53 AM

^ those are programmable options for the security and r/s system itself, not for the remote.

as far as what 04ebluenb said, you when you went through the programming steps I told you earlier, you would have programmed the remote to its standard configuration already.

See this

CrEaTrE · 05-22-2008, 09:01 AM

Alright we are finally getting somewhere. I couldn't mess with the programming much last night because of how late it was and this isn't exactly quiet! This morning I got the AUX button to learn the arm feature and it armed the car right up. Of course I locked myself in the car with no disarm so I had to disarm using the no transmitter method. I'm sort of lost of where to go from here though, do I press the valet button 3 times and hold now instead of 2 and hold in order to try to set the unlock and remote start to buttons? It's talking about channels, but I thought the channels were something different than each feature. I'm going to finish getting ready then mess around with it until I get it all working. Thanks already a ton guys.

Also I forgot to add: When the system armed, the sunroof and passenger window sealed up. However the drivers side window just stayed put. Does that mean there is a DEI add on piece that may not be working correctly?

CrEaTrE · 05-22-2008, 01:15 PM

I got no where. Seems like the only button that works for programming or anything is the aux button. Seems like the other buttons work, but isn't being picked up by the brains or something (shows transmitting icon when I press them). I've unplugged and replugged all the harnesses and wiring, checked all fuses, and all that good stuff. Doesn't seem to involve any of that. Any other ideas? Did the remote just take a dump?

**stage3matt** · 05-22-2008, 01:40 PM

That's where I'd put my money. I actually think I might have an extra 479V in pretty good shape in my toolbox from when I upgraded to the 5900. I'll let you know tomorrow when I get to work.

04ebluenb · 05-23-2008, 01:12 AM

Instead of trying to program the remote function by function just use the auto learn routine. It will automatically know what button does what.

CrEaTrE · 05-23-2008, 09:51 AM

Quote: Originally Posted by 04ebluenb

Instead of trying to program the remote function by function just use the auto learn routine. It will automatically know what button does what.

I tried that and it didn't work as stated in another post.

**stage3matt** · 05-23-2008, 04:04 PM

try programming the remote again, but do this first.

first time, try unplugging the antenna wire from the brain and plugging it back in and then do the auto-configure steps from above (remember that a door must be open).

if that doesn't work, unplug the main harness from the brain (the 12 pin wide plug) and use a flat head screwdriver to touch the pins where the red and black wires would be, discharging all power from the brain effectively resetting it, and then try again.

CrEaTrE · 05-23-2008, 04:08 PM

Quote: Originally Posted by stage3matt

try programming the remote again, but do this first.

first time, try unplugging the antenna wire from the brain and plugging it back in and then do the auto-configure steps from above (remember that a door must be open).

if that doesn't work, unplug the main harness from the brain (the 12 pin wide plug) and use a flat head screwdriver to touch the pins where the red and black wires would be, discharging all power from the brain effectively resetting it, and then try again.

Thanks for more options. I'll go out and do that in a bit and update you again.