An original and current calibration ID number can be compared to determine if the computer is up to snuff or not. Another example could be an existing computer that requires updating due to deficiencies when the vehicle was initially launched. For instance, a brand-new computer is basically dumb and needs programming to become smart, in order to provide even basic functions such as allowing the engine to start.
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The computer may need to be programmed or reprogrammed for a couple of different reasons. Reprogram/reflash: Beyond the relatively basic relearn procedure is the issue of reprogramming a vehicle’s computer, which can be a bit more involved. There are certainly instances where the scanner does not have the specific program to get the job done which in that case may require the drivability option. This procedure will work in most cases however, it may require driving the vehicle for a fair amount of miles.Ī better option is to connect a scanner to the vehicle’s OBD-II connector in order to use the scanner’s program to provide the necessary settings. Once done, the transmission should shift as smooth as silk.īased upon year, make, model and the extent of the original damage, the computer relearn process could be as simple as driving the vehicle using specific apply and shifting sequences. At that point, a computer relearn (reset shift adapts) will be required to complete the job. For instance, a transmission could be completely rebuilt, correctly installed back into the vehicle and with the proper fluid, only to function horribly on the road test. Relearn: Most computer-controlled vehicles will, at the very least, require a reset to the basic factory programming, once a repair has been made to a major component. The question remains which path to take to ensure success. Terms such as relearn, reflash, reprogram, reset shift adapts, etc., are bandied about while determining the best fine-tune approach once the repair work has been completed. Depending on vehicle model and the repairs made, getting a particular module back up to speed could be a bit challenging. Once a repair is made to a particular unit (engine, transmission, etc.), the controlling CPU may have to be massaged a bit in order to make everything click. The purpose of this is to provide consistent operation as a particular component continues to wear over many miles. Beyond the repair criteria was the question of OEM tweaks (updates) and how best to insert them into the black boxes.įor more than two and a half decades vehicle computers have had “adaptive learn” capabilities which means that beyond the basic programming a computer will acquire information based upon drivability conditions and in turn adjust outgoing commands accordingly. As each module was added to a vehicle, so to was the complexity to deal with them, especially when it came to diagnosis and replacement. If the CPU happened to be defective it was not a big thing to slap on another one and cut the vehicle loose.Īs time went on the chorus of control modules was increased to address a variety of different functions i.e. Back then, system diagnostics was not too difficult and more often than not, a simple sensor or actuator replacement would rectify the problem.
#RESET SHIFT POINTS TOYOTA TECHSTREAM TRIAL#
Only after increased demands by the EPA and a substantial amount of trial and error by vehicle manufacturers did the fuel economy landscape really start to change. At first, the CPU was limited in use to a couple of engine functions that would supposedly address those performance concerns. So much for the good old days!ĭue to the real or perceived need to increase fuel economy and decrease emissions output the dreaded computer started to rear its ugly head. Fine tuning was limited to the adjustment of a throttle rod or cable, turning a screw a couple of times on a modulator, or changing a spring on a governor. The issue would be diagnosed, the offending components would be repaired or replaced, and once done final adjustments would be made either before or after a thorough road test. There was a time, long ago, when the owner of a vehicle would experience a transmission problem and roll into a repair facility to have it addressed.
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#RESET SHIFT POINTS TOYOTA TECHSTREAM SKIN#
There is more than one way to skin a computer