The ECU - Electronic Control Unit in the 1998–1999 Mitsubishi 3000GT (Z16A chassis) manages the multi-point injection system for the 3.0 litre 6G72 V6 engine. The engine control unit uses the same four-block ECM connector family as the 1994-on cars (terminals grouped here as A/B/C by circuit function). The 3000GT shares its platform and ECU connector with the Dodge Stealth. Note: the terminal numbering below reflects a later (1997-on) calibration and is not reproduced in the 1992–1996 factory terminal-voltage chart, so several assignments differ from the 1994–1997 tables on this site and could not be fully verified against a primary source.
ECU - Electronic Control Unit Connector.
Connector A
| Pin | name | Signal |
|---|---|---|
| 1 | Injector 1 | Speed |
| 2 | Injector 2 | Speed |
| 9 | Injector 3 | Speed |
| 10 | Injector 4 | Speed |
| 24 | Injector 5 | Speed |
| 25 | Injector 6 | Speed |
Connector B
| Pin | name | Signal |
|---|---|---|
| 44 | Water Temperature Sensor | Analog |
| 45 | Engine Ignition Signal | Speed |
| 46 | ECM Ground | Ground |
| 49 | Ground for various sensors | Ground |
| 51 | Atmospheric Pressure Sensor | Analog |
| 58 | ECM Ground | Ground |
| 61 | Volume Air Flow Sensor | Analog |
| 62 | Air Intake Temperature Sensor | Analog |
Connector C
| Pin | name | Signal |
|---|---|---|
| 71 | O2 Sensor (Front) | Analog |
| 72 | O2 Sensor (Front) | Analog |
| 73 | O2 Sensor (Rear) | Analog |
| 74 | O2 Sensor (Rear) | Analog |
| 78 | Throttle Position Sensor | Analog |
| 80 | Vehicle Speed Sensor | Speed |
| 92 | Manifold differential pressure sensor | Analog |
Notes
The ECU connector system consists of three separate inline connectors (A, B, and C) keyed to prevent mismatching. Connector A carries the six fuel injector drive signals for the 6G72 V6. Connector B groups the primary sensor inputs — coolant temperature, air flow, intake air temperature, and atmospheric pressure — alongside ECM ground references. Connector C carries the oxygen sensor signals (front and rear pairs), the throttle position sensor, vehicle speed sensor, and manifold differential pressure sensor. Terminal inspection procedures specify expected voltages and signal conditions for each pin; consult the factory service manual electrical volume for complete reference values.
Signals
- Injector 1–6 — fuel injector drive outputs for each cylinder of the 6G72 V6; pins 1, 2, 9, 10, 24, 25
- Water Temperature Sensor — analogue input from engine coolant temperature sensor (pin 44)
- Engine Ignition Signal — speed/timing signal derived from ignition system (pin 45)
- ECM Ground — chassis/power ground references for the engine control module (pins 46, 58)
- Ground for various sensors — dedicated sensor reference ground rail (pin 49)
- Atmospheric Pressure Sensor — analogue input from barometric pressure sensor (pin 51)
- Volume Air Flow Sensor — analogue input from mass/volume air flow meter (pin 61)
- Air Intake Temperature Sensor — analogue input from intake air temperature sensor (pin 62)
- O2 Sensor (Front) — analogue inputs from front oxygen sensor; two wires for heated sensor circuit (pins 71, 72)
- O2 Sensor (Rear) — analogue inputs from rear oxygen sensor; two wires for heated sensor circuit (pins 73, 74)
- Throttle Position Sensor — analogue input from throttle position sensor (pin 78)
- Vehicle Speed Sensor — speed pulse input from vehicle speed sensor (pin 80)
- Manifold differential pressure sensor — analogue input from MAP/pressure differential sensor (pin 92)