tach learning, viper 791xv on 1991 240sx
Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=76652
Printed Date: May 17, 2024 at 12:10 PM
Topic: tach learning, viper 791xv on 1991 240sx
Posted By: scotttak
Subject: tach learning, viper 791xv on 1991 240sx
Date Posted: April 23, 2006 at 6:47 AM
hey guys. i have a 791xv hooked up on my car, but i can't get it to learn the tach signal. im almost 100% sure i have the right tach wire (it shows 1-6volts ac). I try to get it to learn, but it just won't. i know i have the valet switch on correctly because i can program the alarm's features. i'm pretty sure i have the remote start system hooked up right also. The car will try to remote start (i have a manual tranny so i hold the clutch down) and will start for a split second. The shutdown diagnostic code its giving me is a low or no rpm error. Im guessing this is because it didnt learn the tach, and im sure im doing it right (turning the car on with the key and holding the valet switch). The led never turns solid, and i know i have this hooked up. Please help, i have tried everything.
Replies:
Posted By: 88vette
Date Posted: April 23, 2006 at 6:12 PM
Go to https://www.designtech-intl.com/main.asp or to www.bulldogsecurity.com and find the wiring diagram for you car. It sounds exactly like you don't have your tach wire on the right spot. Or you might have to change the tach sensing on the alarm brain to sensitive mode. Read the manual on how to do that with the jumper. Hope this helps. ------------- Houston Texas
Posted By: ringojam
Date Posted: April 23, 2006 at 8:33 PM
Take it out of tach learning mod and put it in current sensing it should correct the problem.If not put it to fuel injector,wire to get a stronger wire.
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