The 1994–1997 Dodge Stealth R/T Twin Turbo is a badge-engineered variant of the Mitsubishi 3000GT VR4, built on the shared Z16A platform with a 6G72 3.0 L DOHC twin-turbo V6 engine. The multi-point injection (MPI) engine control unit uses a four-block connector (terminals 1–26, 31–46, 51–62, 71–92), whose terminal layout and signal assignments are identical between the Stealth Twin Turbo and the 3000GT VR4. The ECU governs fuel injection across all six cylinders, ignition timing, idle speed, oxygen sensor feedback, and numerous sensor inputs; the terminal numbers below follow the factory ECM terminal-voltage check chart.
ECU - Electronic Control Unit Connector.
| Pin | Signal | Type |
|---|---|---|
| 1 | Injector 1 | Output |
| 2 | Injector 3 | Output |
| 3 | Injector 5 | Output |
| 4 | Idle air control motor coil A1 | Output |
| 5 | Idle air control motor coil B1 | Output |
| 6 | EGR solenoid | Output |
| 8 | MFI relay control (fuel pump) | Output |
| 9 | Evaporative emission purge solenoid | Output |
| 10 | Ignition power transistor unit A | Output |
| 11 | Ignition power transistor unit C | Output |
| 12 | Power supply | Power |
| 13 | Power ground | Ground |
| 14 | Injector 2 | Output |
| 15 | Injector 4 | Output |
| 16 | Injector 6 | Output |
| 17 | Idle air control motor coil A2 | Output |
| 18 | Idle air control motor coil B2 | Output |
| 19 | Volume air flow sensor reset signal | Output |
| 20 | Radiator fan motor relay (high) | Output |
| 21 | Radiator fan motor relay (low) | Output |
| 22 | Air conditioning relay | Output |
| 23 | Ignition power transistor unit B | Output |
| 25 | Power supply | Power |
| 26 | Power ground | Ground |
| 31 | Fuel pump relay 2 | Output |
| 32 | Turbocharger wastegate solenoid | Output |
| 36 | Check engine / MIL lamp | Output |
| 37 | Power steering pressure switch | Input |
| 38 | MFI relay control (power supply) | Output |
| 44 | Anti-lock braking signal | Input |
| 45 | Air conditioning switch 1 | Input |
| 52 | Ignition timing adjustment terminal | Input |
| 59 | Air conditioning switch 2 | Input |
| 61 | Sensor reference voltage (5 V) | Power |
| 71 | Ignition switch-ST (M/T) | Input |
| 72 | Intake air temperature sensor | Analog |
| 75 | Heated oxygen sensor, front (right bank) | Analog |
| 76 | Heated oxygen sensor, front (left bank) | Analog |
| 80 | Back-up power supply | Power |
| 82 | Ignition switch-IG | Input |
| 83 | Engine coolant (water) temperature sensor | Analog |
| 84 | Throttle position sensor | Analog |
| 85 | Barometric (atmospheric) pressure sensor | Analog |
| 86 | Vehicle speed sensor | Speed |
| 87 | Closed throttle position switch | Input |
| 88 | Camshaft position sensor | Speed |
| 89 | Crankshaft position sensor | Speed |
| 90 | Volume air flow sensor | Analog |
| 91 | Park/Neutral position switch (A/T) | Input |
Notes
The table lists the documented terminals from the factory ECM terminal-voltage check chart. The four-block ECU connector (terminals 1–26, 31–46, 51–62, 71–92) is proprietary to the Z16A chassis and is not interchangeable with the earlier 1991–93 variants. The two dedicated ECU power grounds are pins 13 and 26.
Terminals that changed for 1996+ (turbo): Engine ignition signal 58 → 51; Electric-load switch 24 → 58; Fuel-pressure solenoid 7 → 40; Turbo meter 41 → 39; Muffler-mode changeover switch 34 → 61; Heated oxygen sensor (rear) 60 → 73 and 79. A/T-only lines: “reduce-torque” request 46 and 43 (→ 60 for 1996+), execution 7.
Signals
- Injector 1–6 — individual fuel injector drive outputs for each cylinder of the 6G72 DOHC V6; pins 1, 2, 3 (cylinders 1, 3, 5) and pins 14, 15, 16 (cylinders 2, 4, 6)
- Power Ground — chassis/power ground reference for ECU output drivers (pins 13 and 26)
- Air Intake Temperature Sensor — analogue input from the intake air temperature thermistor in the volume air flow sensor housing
- O2 Sensor #1 (Right Bank) — analogue voltage input from the front (right) oxygen sensor for closed-loop fuel trim
- O2 Sensor #2 (Left Bank) — analogue voltage input from the front (left) oxygen sensor; the twin-turbo uses one sensor per bank
- Engine Coolant Temperature Sensor — analogue input from the ECT thermistor; used for fuel enrichment, fan control, and warm-up strategy
- Throttle Position Sensor — analogue voltage proportional to throttle plate angle; used for load calculation and acceleration enrichment
- Atmospheric Pressure Sensor — analogue input from the barometric pressure sensor used for altitude compensation of fuel delivery
- Vehicle Speed Sensor — pulse signal from the transmission-mounted VSS; used for idle control and speed-dependent strategies
- Volume Air Flow Sensor — analogue signal from the karman vortex or hot-wire mass air flow sensor measuring inducted air volume
References
- Mitsubishi 3000GT Service Manual 1992-1996 — Volume 1 (Engine) — MPI section 13A, “Engine Control Module (ECM) Terminal Voltage Check Chart” (Z9FU0393 connector) and ECM power-ground figure (13A-199).
- Dodge Stealth Service Manual 1994 — Volume 2 (Electrical)