SUPER MULTIPLE JUNCTION (SMJ) — Terminal Arrangement (Supplement-VII)
EL-7104component photoSMJ terminal reference. Gas ECM = 88-pin numeric scheme. Diesel ECM = letter-cell scheme (MA-MM × 2-4 rows). Critical cross-ref for interpreting diesel wiring page pin labels.
Terminal Arrangement
NOTE
SMJ terminal arrangement reference page. Two ECM-connector schemes are documented:
• Gasoline ECM — numeric pin scheme 1-88 (88-pin connector). Unused positions marked X.
• Diesel ECM — letter-cell scheme (MA/MB/MD/MH/MJ/ML/MM × 2/3/4 row). Different convention; e.g. cell 'CA4' = column C row A row-4. Used elsewhere in the manual as 'CA4' / 'CC4' pin labels (see EL-7043 diesel warning lamps).
A third SMJ at the bottom (with cells CB3/CG2/CH2/CJ2/CA4/CC4) is likely the CSOLU + diesel-EGR cluster used in NATS-diesel wiring.
All three views are 'from harness side' — i.e. looking at the connector from the wires-coming-in face.
WARNING
Diesel ECM uses letter-cell pin labels (e.g. CA4, CC4, MA2, etc.) instead of numeric pins. Don't confuse with the 88-pin gasoline ECM scheme. The letter-cell convention appears throughout diesel-engine wiring diagrams in this supplement.