E38 ECM Wiring 09-02-13, 01:16 PM. So im doing a L98/6sp Manual swap into a E36 the dummy engine and transmission are mounted. The sump is off getting welded and once i get it back im going to start making my pipes.. So i thought id start working on getting the wiring sorted. The L98 runs a 52 tooth wheel on the crank so im pretty sure ive got ...for an ISX CM871 but the ECM Code requested is for an ISB CM2150, this message would appear. Please verify the ESN and ECM Code. Note: Enter the ECM calibration code without the ECM Code Revision. Q: My module is ROM booted, how can I find the ECM Code? A: The ECM Code and/or the SC and DO Options should be stamped on the engine dataplate.