Product Description

We purchased this for a build several years ago and never ended up using it. It is a Novak Tach emulator for a 2005-2006 Jeep TJ-LJ and works with a GEN3 and GEN4 LS engine. It is brand new and un-opened. 

In 1996, Chrysler Jeep rolled out a more advanced version of their in-vehicle network called the Controller Area Network Bus, or CAN Bus system, over which data is shared between various electronic modules in the Jeep. One of those modules is the Jeep gauge cluster which uses a microcontroller to run the gauges.

One largely successful strategy in retaining the factory gauges has been to keep the Jeep Powertrain Control Module (PCM) connected to the network as nothing more than a gauge mule, which is good for every gauge in the cluster except the tachometer, until now...

The Tachometer Emulator Module

Novak has developed this innovative emulator module that receives the tachometer output from a GM Generation III/IV PCM. It then outputs the correct Crank Position (CKP) pulses to the Jeep PCM which then calculates the engine RPM's to be transmitted on the CAN bus to the Jeep gauge module.

This emulator module is built using an industrial duty processor making thousands of calculations per second to properly mimic the pulsetrain needed by the Jeep PCM to calculate and relay engine speed.