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ENGINE APPLICATION MANUAL GM Powertrain
Gasoline 4.3L V6 90 Degree Revised: 08/15/2000
File: c:\data\manuales\v6-truck\am43v6#3.doc
Contact:Luis Nespolo - (248) 857-1558 Printed: 8/15/00
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3.1.5b PCM Pin Out and Pin In – Marine and Industrial Applications
Marine Applications use a different control module : MEFI – 4 Multiport Electronic Fuel Injection.
Interfaces as those described for vehicles application, OBD II, and Emissions requirement are
not longer needed.
Table A.1 shows the connector pin out for MEFI Electronic Control Module (ECM) Part Number
12569494 Rev B.
Table A.1 – Pinout
PIN MEFI4 PIN NAME PIN MEFI4 PIN NAME
J1-1 KNOCK2 J2-1 BATT
J1-2 DIAG*_BOOT J2-2 V5B
J1-3 MASTER J2-3 V5BRTN
J1-4 GW2/GOVMOD J2-4 FUELPRESS
J1-5 ESTOP J2-5 EGRFB
J1-6 FPR J2-6 O2AHI
J1-7 RPMCHG J2-7 CLT
J1-8 BUZZER J2-8 MAP
J1-9 CKGAGE/GOVOVS J2-9 CANLO
J1-10 VR_REFLO J2-10 SDATA
J1-11 INJB J2-11 TACDATA2
J1-12 EGR J2-12 ESTH
J1-13 GND3 J2-13 ESTF
J1-14 TACH J2-14 ESTD
J1-15 IACBLO J2-15 ESTB_BYP*
J1-16 IACAHI J2-16 REF
J1-17 KNOCK1 J2-17 DEPSPWR
J1-18 OILLEV J2-18 DEPSLO
J1-19 GW1/FCAL J2-19 IGN
J1-20 LOAD1/LOCKLO/SHIFTINT J2-20 OILPRESS
J1-21 LOAD2/TWINSYNC/TROLL J2-21 MAT
J1-22 GW1LMP/TRAN/CNP J2-22 O2BHI
J1-23 GW2LMP/TROLLMP/GOV J2-23 TPS
J1-24 OILLEVLMP J2-24 CANHI
J1-25 VR_REFHI J2-25 VSSVF
J1-26 INJA J2-26 VSS_AN/FTEMP
J1-27 CE J2-27 TACDATA1
J1-28 GND1 J2-28 ESTG
J1-29 GND2 J2-29 ESTE
J1-30 IACBHI J2-30 ESTC
J1-31 IACALO J2-31 ESTA
J1-32 FPRSENSE J2-32 CAM