I was just wondering if anyone has tried this, and if so did it work? My only concern in touching the positive terminal to the negative for 30 seconds.
I found this at this site. http://www.mhjcontherocks.com/Community/TechWriteUps/196.aspx
Forced Flash
This very simple procedure will Erase the "Adaptive Memory" stored inside the TJ PCM and allow a new "Adaptive Memory" to be developed.
After performing this procedure the PCM will re-learn and store into Adaptive Memory your engines performance characteristics.
Please perform these steps exactly as they are written, in the order they are written. This will cause the adaptive memory in the PCM to be erased and cause the PCM to go into Fast Learn Mode adaptive mode.
Disconnect the POSITIVE battery Terminal and touch it to ground for 30 seconds. (This is to discharge the PCM capacitors, which maintain the Adaptive Memory.
Reconnect the Battery Cable
Turn Ignition Switch to the "On" position but DO NOT start the engine
Turn Headlight "On"
Turn Headlights "Off"
Turn Ignition Key "Off"
The PCM Adaptive memory has now been flashed, or erased from the PCM.
When you start the engine it will be running off a set of pre-programmed tables that come with the PCM from the factory.
When you get the engine up to operating temperature the PCM will start to collect data for the "Adaptive Memory".
The PCM will collect data for Adaptive Memory for the first 50 Warm-up Cycles.
Warm-up Cycle
A warm-up cycle happens when all of the following conditions exist.
Engine is running
A raise of 40F in engine temperature must occur ABOVE the engine temperature at start-up
Engine Coolant Temp must reach at least 160 F.
I found this at this site. http://www.mhjcontherocks.com/Community/TechWriteUps/196.aspx
Forced Flash
This very simple procedure will Erase the "Adaptive Memory" stored inside the TJ PCM and allow a new "Adaptive Memory" to be developed.
After performing this procedure the PCM will re-learn and store into Adaptive Memory your engines performance characteristics.
Please perform these steps exactly as they are written, in the order they are written. This will cause the adaptive memory in the PCM to be erased and cause the PCM to go into Fast Learn Mode adaptive mode.
Disconnect the POSITIVE battery Terminal and touch it to ground for 30 seconds. (This is to discharge the PCM capacitors, which maintain the Adaptive Memory.
Reconnect the Battery Cable
Turn Ignition Switch to the "On" position but DO NOT start the engine
Turn Headlight "On"
Turn Headlights "Off"
Turn Ignition Key "Off"
The PCM Adaptive memory has now been flashed, or erased from the PCM.
When you start the engine it will be running off a set of pre-programmed tables that come with the PCM from the factory.
When you get the engine up to operating temperature the PCM will start to collect data for the "Adaptive Memory".
The PCM will collect data for Adaptive Memory for the first 50 Warm-up Cycles.
Warm-up Cycle
A warm-up cycle happens when all of the following conditions exist.
Engine is running
A raise of 40F in engine temperature must occur ABOVE the engine temperature at start-up
Engine Coolant Temp must reach at least 160 F.