300ZX Z32 ECU - Electronic Control Unit Connector.
The Nissan 300ZX Z32 (1990–1995) is powered by the VG30DETT, a 3.0-litre twin-turbocharged DOHC V6 engine managed by Nissan’s ECCS (Electronic Concentrated Control System). The ECU uses a single 76-pin ECCS harness connector — one housing whose terminals are numbered in four groups (1–20, 21–40, 41–60, and injector/output group 101–116) around a central securing bolt. The ECCS unit controls sequential multi-point fuel injection, electronic ignition timing, boost control, and transmission signal exchange, and communicates with the Nissan CONSULT diagnostic interface via dedicated receive and send data lines.
ECM connector (76-pin)
| Pin | name | Signal | Pin | name | Signal | |
|---|---|---|---|---|---|---|
| 1 | Cylinder No 1 spark | 11 | Cylinder No 4 spark | |||
| 2 | Cylinder No 2 spark | 12 | Cylinder No 5 spark | |||
| 3 | Cylinder No 3 spark | 13 | Cylinder No 6 spark | |||
| 4 | AAC Valve | 14 | Signal to Automatic Transmission | |||
| 5 | Signal to Automatic Transmission | 15 | Signal to Automatic Transmission | |||
| 6 | Radiator Fan Sub Relay | 16 | ECCS Relay Coil Ground | |||
| 7 | Tachometer Signal | RPM | 17 | NC | ||
| 8 | AIV control solenoid valve | 18 | Fuel Pump Relay | |||
| 9 | Signal from Air Conditioning | 19 | Radiator Fan Relay | |||
| 10 | Ignition Ground | 20 | Ignition Ground | |||
| 21 | Diagnostics Receive Data | 31 | Diagnostic Clock | |||
| 22 | Diagnostics Send Data | 32 | Check Engine Light | |||
| 23 | Knock Sensor | 33 | F.I.C.D. Solenoid Valve | |||
| 24 | NC | 34 | Power Steering Oil Pressure Switch | |||
| 25 | Boost Control Valve | 35 | Fuel Pump Control Unit | |||
| 26 | Mass Air Flow Sensor Ground | 36 | Fuel Temperature Sensor | |||
| 27 | Mass Air Flow Sensor | Analog | 37 | NC | ||
| 28 | Engine Coolant Temperature Sensor | Analog | 38 | Throttle Position Sensor | Analog | |
| 29 | O2 Sensor Signal (Right side) | Analog | 39 | NC | ||
| 30 | Sensor Ground | Ground | 40 | Signal to Automatic Transmission | ||
| 41 | Crank Angle Sen 120 deg input | 51 | Crank Angle Sen 120 deg input | |||
| 42 | Crank Angle Sen 1 deg input | 52 | Crank Angle Sen 1 deg input | |||
| 43 | Start Switch | 53 | Vehicle Speed Sensor | Speed | ||
| 44 | Neutral Switch | 54 | Throttle Valve Switch (idle position) | |||
| 45 | Ignition Switch | 55 | O2 Sensor Signal (left side) | |||
| 46 | Air Conditioned Switch | 56 | Signal to Automatic Transmission | |||
| 47 | Check Signal on Diagnostic | 57 | Throttle Valve Switch (idle position) | |||
| 48 | Throttle Position Sensor | 58 | Battery Power Supply | |||
| 49 | Control Unit 12 Volt Power Supply | 59 | Control Unit 12 Volt Power Supply | |||
| 50 | Ground | 60 | Engine Ground | |||
| 101 | Injector # 1 | Speed | 109 | Injector Power 12 Volt Constant | ||
| 102 | EGR | 110 | Injector # 2 | Speed | ||
| 103 | Injector # 3 | Speed | 111 | NC | ||
| 104 | Fuel Pump 12 Volt Control Output | 112 | Injector # 4 | Speed | ||
| 105 | Injector # 5 | Speed | 113 | Variable Timing Control Solenoid Ground | ||
| 106 | NC | 114 | Injector # 6 | Speed | ||
| 107 | Injector Ground | 115 | Oxygen Sensor Heater | |||
| 108 | Injector Ground | 116 | Power Ground (Engine Control Module) | Ground |
Notes
- Fields with RED background indicate power supply pins.
- Pins 1–60 carry sensor inputs, ignition outputs, diagnostic lines, and transmission signals; the 101–116 group carries injector drive and fuel pump outputs.
- The twin-turbo VG30DETT variant uses a Boost Control Valve output (pin 25); naturally-aspirated VG30DE-equipped models have a different ECU and connector layout.
- Pins marked NC are not connected in the factory harness.
References
- Nissan 300ZX (Z32) Factory Service Manual — Engine Fuel & Engine Control (EF & EC) Section — Nissan Motor Co., Ltd.