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'''ECUs sent in for repair 2018''' '''11440''' * Power touched bare wire on RS232 port (connector without housing) and customer has has intermittent communication since that time. * Customer has tried different USB serial port adapters and in another car/harness as well. * My personal tests on my test bench show no issues, tried with a desktop computer with proper serial port and laptop with known good USB serial port adapter. * Perform your tests and report back. Even if you find nothing wrong, please replace the RS232 chip (customer request). '''4153 and 4254''' * Have recently been returned from you but it is as if nothing has changed, you still can not get a lambda signal. * The current draw from the heater is only a few 100 mA and the sensor doesn't get hot to the touch. ** are you sure it's not the heater +12V or similar (sg in the harness) ? The heater - FET output was tested with >1A load * As described last time, both ECUs has lost the wideband signal after moisture got into lambda sensor connector. * My guess : Voltage from the fused power has probably trickled into the other pins in the lambda connector and damaged the input/control circuitry, and/or possibly the heater FET as well. Please try free-air calibration with a real sensor (it doesn't work) and report back what you find in Wiki. * Please add 27k nernstpullup resistor to enable LSU 4.9 support if you get them working. * Board replacement granted in worst case scenario ---- '''ECUs sent in for repair 2017''' All of the ECUs listed below will not be used in the projects they came from. I've replaced the ECUs already and fixed any/all issues that caused the problems. Check function of the boards and report back any issues, or return to me if healthy after quick fix. I authorize mainboard replacement if necessary in all cases. '''3399''' * Stepper chip removed by customer after short in the coil harness (heat radiation). * PCB damaged around stepper chip, do not replace chip - just leave as is. '''4153 ''' * No lambda sensor signal after water came into lambda sensor connector. '''4254 ''' * No lambda sensor signal after water came into lambda sensor connector. '''4770 ''' * No lambda sensor signal after water came into lambda sensor connector. * ''Replaced by 17319'' IGBT 2+6, LCD, Knock, 1xEGT, VR+Hall, 400 kPa '''8098 ''' * Outputs shorted to power in standard BMW M50 harness (heat melted wires). * I removed one injector FET and one ignition IGBT that had shorted. * There could be more damages. * ''Replaced by 14365'' 2xEGT, VR+Hall, 400 kPa '''10115 ''' * ECU has never been used, only test bench. * It has the bootup/reset problem. I tried the simple fixes with components sent by Marcel but it did not help. ** www.vems.hu/download/v3/doc/assembly/v3_mainboard_resetChips_variants.pdf * ''Replaced by 18357'' LCD, Knock, EGTx2, Hall+Hall '''11820''' * Stepper output shorted to +12V in harness (yes resistor in series now in place). * Symptom is a 250 mA current draw, no VR trigger, possibly damaged P259. * ''Replaced by 17039'' LCD, Knock, 1xEGT, VR+Hall, 400 kPa, SD Card removeable '''14821''' * Same as 11820 * Stepper output shorted to +12V in harness (yes resistor in series now in place). * Symptom is 250 mA current draw, no VR trigger, possibly damaged P259.
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