1Frequency sweeper with 5V square wave output (duty cycle is 50%, effective frequency range from 10kHz above (maximum 50kHz) to 50Hz). 2It can be regarded as the MCU version of the software TMS374 decoder ECU. The only difference between the two tools is that the MCU version does not require a PC to work. 3Use a small MCU instead of the PC RS232 Tx line to generate pulses, which has stable and professional performance. 4The effective range is from about 2000Hz to about 100 Hz. The functions of the sweeper are exactly the same, but the effect is better (larger range). 5Decode ECU into a new state without the need for PC. There are wiring instructions to reduce your error rate, simple operation. Item Type: ECU Decoder Material: ABS Size: Approx. 66 x 43mm/2.6 x 1.7in Wiring: +: 12v DC -: GND S: Signal wire Instructions for Use: After powering the device on - the LED should flash twice. The sweeping process starts as power is supplied to the device. LED ON - means there are pulses on the output. After reaching the lowest frequency the LED goes off and the mcu stops the generation. * Connect the GND line to any suitable GND on the ECU via the small grabber. * Connect the Data line to the Reset pin on the EPROM via the small grabber. * Power the ECU and then the sweeper, the sweeper will flash twice on power up. * Press the button and the device will start sweeping, once the LED turns off your done. * Cut the immo data line on the ECU before re-fitting back to car. TMS-374 Decoder ECU info The sweeper should work with the following ECUs: Fit for Renault SIEMENS Fenix 3 and 5 Fit for Renault Megane 1400cc 8v Fit for Renault Megane 1600cc 8v Fit for Renault Megane 2000cc 8v Fit for Renault Megane 2000cc 16V Fit for Renault Megane Scenic 1400cc 8v Fit for Renault Megane Scenic 1600cc 8v Fit for Renault Megane Scenic 2000cc 8v Fit for Renault Sefrane 2000cc 16V Fit for Renault Laguna 2000cc 8v Fit for Renault Laguna 2000cc 16v Fit for Renault Espace 2000cc 8v Fit for Renault SAGEM SAFIR 1 and 2 Fit for Renault Clio 1200cc 8V Fit for Renault Clio 1400cc 8V Fit for Renault Clio 1600cc 8V Fit for Renault Clio 2000cc 16V Williams Fit for Renault Laguna 1800cc 8V Fit for Renault Laguna 2000cc 8V Fit for Renault Laguna 1800cc 16V Fit for Renault Laguna 2000cc 16V Fit for Renault Twingo 1200cc 8V NOTE: If reset pin is connected to ground then it must be lifted or the track cut before decoding. This can be re-attached after decoding the ecu. As a rule of thumb keep the power connected to the ECU for a futher five minutes after the decoder has completed the decoding process.