Er det forskjell på ecu til 175 hk 3sge motor og 156 hk motor? Og hva er evt. Forskjell? 
i følge wikipedia:
Generation 2
The second generation was produced from 1990 to 1993, receiving a slight boost in output to 165 PS (121 kW), 156 PS (115 kW) in European markets. Peak torque went to 19.5 kg·m (191 N·m). It also proved to be a slightly more reliable engine. The second generation also did away with the T-VIS system, which was replaced by the ACIS (Acoustic Control Induction System), proving to be much more efficient. T-VIS was, however, retained on the second-generation 3S-GTE, the turbocharged counterpart.
Generation 3
The third-generation 3S-GE was produced from 1994 to 1999. Power output for the Japanese market was increased to 180 PS (132 kW; 178 hp) as the compression ratio was increased to 10.3:1, while motors for other markets received a minor revision in 1996 for emissions (EGR) which reduced power output slightly to 170 PS (125 kW; 168 hp) at 7,000 rpm. Torque remains the same for both at 19.5 kg·m (191 N·m).
