Just remember that approximately 4.5 volts need to be applied to the output of the LMM (likely referring to a laser module monitor). So, it's clear how the diode needs to be connected - always with the ring towards the output.
When the diode is connected, the control unit (STG) detects a very high air mass, which, depending on the engine mapping, results in an above-average high exhaust gas recirculation (AGR) rate in the lower speed and load range. This could have a disruptive effect.
I can't find him... funny title
How's his loader doing? Have you already found a replacement?