AEM 30-6040 Series 2 Plug & Play EMS - Manual (Page 10)

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30-1040 (Series 1) vs 30-6040 (Series 2) OBD1 Honda EMS pin differences:
The EMS functions assigned to certain pins have been changed and no longer match the
30-1040 EMS. Unless otherwise noted, the following pins and functions will need to be
manually reconfigured after using AEMTuner to convert a V1.19 (30-1100, Series 1 EMS)
calibration for use with the 30-6100 Series 2 hardware.
Pin OBD1 Honda / Acura 30-1040 function 30-6040 function Notes
A22 Ignition Control Module --- CAN1L
B4 --- Coil #5 Coil 4
Copy settings for Ign Phasing,
knock feedback, cylinder ign trim
C2 --- --- CAN1H
D4 Service Check Connector Knock #2 Injector 9 Knock 2 not available