The readings from this sensor are then fed back to the Engine control unit (ECU).
Swapping of the 4-cylinder RS engines can be slightly more complicated than the V6 GS mainly due to ECU, wiring harness, and MAF combinations as well as motor mounts.
However, in order to achieve these levels of power it is necessary to make quite a number of changes - exchanging the intercooler for a larger version and relocating it to the front bumper, installing a revised exhaust and induction kit, plus a number of electronic engine management devices to alter the fuelling and turbo boost safety points.
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Differing vehicle safety regulations in the rest of the world versus North America required the Saratoga to have different headlamps and front, side, and rear lights and reflectors, glass, mirrors, seat belts, instrument clusters and radios; engine control units were programmed in accord with European emission standards rather than the North American standards.
The engine control unit (ECU) of the 14CUX system is run by a Motorola MC6803U4 8-bit microprocessor, which is an uncommon variant of the otherwise ubiquitous 6803.
Also, PEMS testing identified several engine “anomalies” where fuel-specific NOx emissions were two to three times higher than expected during some modes of operation, suggesting deliberate alterations of the engine control unit (ECU) settings.
The family introduced many changes for Toyota, including various EFI, ECU, and engine improvements from generation to generation.
Uberdata (also known as Überdata or Uber data) is a ROM editing software designed specifically for On Board Diagnostics (OBD) Honda Engine control units.