Toyota Supra A70 1986-92 (7M-GTE) → Motorsport Electronics ME221 (auto)
Toyota Supra A70 1986-92 (7M-GTE) — Motorsport Electronics — ME221
⚠ NOT CHECKED. Don't build from this.
Drawn by Michael Gnankou · Rev 0 · draft · 2026-10-23
Before you start
Not confident with automotive wiring? Have a professional harness builder or tuner do it, or check your work before first power-up. A wiring mistake can damage the ECU, the engine or the car, or start a fire.
| Status | draft · not yet verified: nobody has reported building and running this harness |
|---|---|
| Open errors | none |
| Size of the job | 25 wires · 7 connectors · 0 part lines |
| Tools | Crimp and extraction tools for each terminal family (see Connectors) · wire strippers · multimeter · heat gun + heat-shrink |
| Order of work | 1. Check every part against the parts list. 2. Cut and label every wire (labels: Export → Wire labels). 3. Crimp and pin connector by connector, ticking the build checklist. 4. Run the bench test with nothing plugged in and the battery disconnected. 5. Only then connect the ECU and power up. |
Build checklist
Tick each box as you go. Continuity: meter from end to end, expect under 1 Ω.
| Wire | From | To | Gauge | Colour | Cut | Label | Crimp A | Crimp B | Pin A | Pin B | Continuity |
|---|---|---|---|---|---|---|---|---|---|---|---|
| W1 | OEM-D-12 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | OEM-D-13 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | SP-14V-1 | ME221-C1-15 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | SP-14V-1 | ME221-C1-64 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-A-26 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | SP-GND-1 | ME221-C1-10 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | SP-GND-1 | ME221-C1-61 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | SP-GND-1 | ME221-C1-89 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | SP-GND-1 | ME221-C1-90 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | OEM-B-9 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | SP-0V-1 | ME221-C1-52 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | SP-0V-1 | ME221-C1-84 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | OEM-D-5 | ME221-C1-53 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-A-12 | ME221-C1-63 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-A-11 | ME221-C1-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-A-25 | ME221-C1-33 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-D-4 | ME221-C1-37 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-B-11 | ME221-C1-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-B-4 | ME221-C1-86 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-D-2 | ME221-C1-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-B-6 | ME221-C1-56 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-D-3 | ME221-C1-57 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-D-9 | ME221-C1-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-D-10 | ME221-C1-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-D-11 | ME221-C1-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ |
Bench test (before first power-up)
Battery disconnected, ECU and every sensor unplugged. Meter on resistance. Each pair below must read open (OL): a reading means a pinched wire, a stray strand or a mis-pinned cavity. Then check continuity of every wire (last column of the build checklist).
| # | Probe A | Probe B | Expect | Why | Reading |
|---|---|---|---|---|---|
| 1 | ME221-C1-10 | ME221-C1-15 | open (OL) | power ground must not touch +12 V supply | |
| 2 | ME221-C1-52 | ME221-C1-15 | open (OL) | sensor ground must not touch +12 V supply |
If any reading doesn't match, stop and get help before powering up.
Revisions
| Rev | Label | By | Date |
|---|---|---|---|
| No revisions yet. | |||
Schematic
Connectors
ME221-C1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | COIL 4 | — | — | — | — | — | — | — | — |
| 10 | GROUND CHASSIS | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| 12 | LOW SIDE 2 | — | — | — | — | — | — | — | — |
| 14 | LSU +12V | — | — | — | — | — | — | — | — |
| 15 | IGN +12V | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 16 | LSU HEATER -VE | — | — | — | — | — | — | — | — |
| 17 | ANA VOLT 3 | — | W24 | — | 0.5 | OEM-D-10 | — | — | — |
| 18 | ANA VOLT 4 | — | W25 | — | 0.5 | OEM-D-11 | — | — | — |
| 19 | LSU UN | — | — | — | — | — | — | — | — |
| 2 | COIL 3 | — | — | — | — | — | — | — | — |
| 20 | LSU VM | — | — | — | — | — | — | — | — |
| 21 | CAN 1 HIGH | — | — | — | — | — | — | — | — |
| 22 | CAM A VR+ | — | — | — | — | — | — | — | — |
| 23 | CAM A VR- | — | — | — | — | — | — | — | — |
| 24 | SERIAL 1 GROUND | — | — | — | — | — | — | — | — |
| 25 | SERIAL 1 TX | — | — | — | — | — | — | — | — |
| 26 | ANA VOLT 1 | — | W18 | — | 0.5 | OEM-B-11 | — | — | — |
| 3 | INJECTOR 4 | — | — | — | — | — | — | — | — |
| 31 | COIL 2 | — | — | — | — | — | — | — | — |
| 32 | COIL 1 | — | — | — | — | — | — | — | — |
| 33 | INJECTOR 3 | — | W16 | — | 0.5 | OEM-A-25 | — | — | — |
| 35 | USB D+ | — | — | — | — | — | — | — | — |
| 36 | USB D- | — | — | — | — | — | — | — | — |
| 37 | LOW SIDE RELAY 11 | — | W17 | — | 0.5 | OEM-D-4 | — | — | — |
| 38 | USB VBUS | — | — | — | — | — | — | — | — |
| 39 | LOW SIDE 6 | — | — | — | — | — | — | — | — |
| 4 | INJECTOR 2 | — | W15 | — | 0.5 | OEM-A-11 | — | — | — |
| 41 | USB GROUND | — | — | — | — | — | — | — | — |
| 42 | LOW SIDE RELAY 12 | — | — | — | — | — | — | — | — |
| 43 | LOW SIDE RELAY 14 | — | — | — | — | — | — | — | — |
| 44 | LOW SIDE 4 | — | — | — | — | — | — | — | — |
| 45 | 5V REF | — | — | — | — | — | — | — | — |
| 46 | 5V REF | — | — | — | — | — | — | — | — |
| 49 | LSU IA | — | — | — | — | — | — | — | — |
| 50 | LSU IP | — | — | — | — | — | — | — | — |
| 51 | CAN 1 LOW | — | — | — | — | — | — | — | — |
| 52 | SENSORS GROUND | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| 53 | KNOCK 1 SIGNAL | — | W13 | — | 0.5 | OEM-D-5 | — | — | — |
| 55 | SERIAL 1 RX | — | — | — | — | — | — | — | — |
| 56 | ANA VOLT 2 | — | W21 | — | 0.5 | OEM-B-6 | — | — | — |
| 57 | ANA TEMP 2 | — | W22 | — | 0.5 | OEM-D-3 | — | — | — |
| 6 | DIG_IN 1 | — | W20 | — | 0.5 | OEM-D-2 | — | — | — |
| 61 | GROUND | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 63 | INJECTOR 1 | — | W14 | — | 0.5 | OEM-A-12 | — | — | — |
| 64 | VBAT | — | W4 | — | 0.85 | SP-14V-1 | — | — | — |
| 67 | Stepper 1 / A1 | — | — | — | — | — | — | — | — |
| 68 | Stepper 2 / A2 | — | — | — | — | — | — | — | — |
| 69 | LOW SIDE 5 | — | — | — | — | — | — | — | — |
| 7 | DIG_IN 2 | — | W23 | — | 0.5 | OEM-D-9 | — | — | — |
| 70 | Stepper 3 / B1 | — | — | — | — | — | — | — | — |
| 71 | Stepper 4 / B2 | — | — | — | — | — | — | — | — |
| 72 | LOW SIDE RELAY 13 | — | — | — | — | — | — | — | — |
| 73 | LOW SIDE 1 | — | — | — | — | — | — | — | — |
| 74 | LOW SIDE 3 | — | — | — | — | — | — | — | — |
| 76 | 5V REF | — | — | — | — | — | — | — | — |
| 79 | TACHOMETER | — | — | — | — | — | — | — | — |
| 80 | CRANK VR+ | — | — | — | — | — | — | — | — |
| 81 | CRANK VR- | — | — | — | — | — | — | — | — |
| 84 | Sensor Ground | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| 86 | ANA TEMP 1 | — | W19 | — | 0.5 | OEM-B-4 | — | — | — |
| 89 | GROUND | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| 90 | GROUND | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
OEM-A
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 11 | Injectors 2 & 6 (No.20) | — | W15 | — | 0.5 | ME221-C1-4 | — | — | — |
| 12 | Injectors 1 & 4 (No.10) | — | W14 | — | 0.5 | ME221-C1-63 | — | — | — |
| 25 | Injectors 3 & 5 (No.30) | — | W16 | — | 0.5 | ME221-C1-33 | — | — | — |
| 26 | Power ground (E01/E02) | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
OEM-B
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 11 | Throttle position sensor (VTA) | — | W18 | — | 0.5 | ME221-C1-26 | — | — | — |
| 4 | Coolant temp (THW) | — | W19 | — | 0.5 | ME221-C1-86 | — | — | — |
| 6 | Primary O2 sensor (OX1) | — | W21 | — | 0.5 | ME221-C1-56 | — | — | — |
| 9 | Sensor ground (E1) | — | W10 | — | 0.5 | SP-0V-1 | — | — | — |
OEM-D
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 10 | A/C compressor request (A/C) | — | W24 | — | 0.5 | ME221-C1-17 | — | — | — |
| 11 | Starter signal (STA) | — | W25 | — | 0.5 | ME221-C1-18 | — | — | — |
| 12 | EFI main relay power (+B) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| 13 | EFI main relay power (second feed) (+B1) | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 2 | Karman-vortex AFM signal (KS) | — | W20 | — | 0.5 | ME221-C1-6 | — | — | — |
| 22 | Neutral start switch (NSW) | — | — | — | — | — | — | — | — |
| 3 | Intake air temp (THA) | — | W22 | — | 0.5 | ME221-C1-57 | — | — | — |
| 4 | EFI main relay control (M-REL) | — | W17 | — | 0.5 | ME221-C1-37 | — | — | — |
| 5 | Knock sensor 1 (KNK1) | — | W13 | — | 0.5 | ME221-C1-53 | — | — | — |
| 9 | Vehicle speed sensor (SPD) | — | W23 | — | 0.5 | ME221-C1-7 | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W10 | — | 0.5 | OEM-B-9 | — | — | — |
| 1 | — | — | W11 | — | 0.5 | ME221-C1-52 | — | — | — |
| 1 | — | — | W12 | — | 0.5 | ME221-C1-84 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-D-12 | — | — | — |
| 1 | — | — | W2 | — | 0.85 | OEM-D-13 | — | — | — |
| 1 | — | — | W3 | — | 0.85 | ME221-C1-15 | — | — | — |
| 1 | — | — | W4 | — | 0.85 | ME221-C1-64 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W5 | — | 0.85 | OEM-A-26 | — | — | — |
| 1 | — | — | W6 | — | 0.85 | ME221-C1-10 | — | — | — |
| 1 | — | — | W7 | — | 0.85 | ME221-C1-61 | — | — | — |
| 1 | — | — | W8 | — | 0.85 | ME221-C1-89 | — | — | — |
| 1 | — | — | W9 | — | 0.85 | ME221-C1-90 | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-A-11 | Injectors 2 & 6 (No.20) | injector_out | ME221-C1-4 | INJECTOR 2 | injector_out | corroborated | |
| OEM-A-12 | Injectors 1 & 4 (No.10) | injector_out | ME221-C1-63 | INJECTOR 1 | injector_out | corroborated | |
| OEM-A-25 | Injectors 3 & 5 (No.30) | injector_out | ME221-C1-33 | INJECTOR 3 | injector_out | corroborated | |
| OEM-A-26 | Power ground (E01/E02) | ground | ME221-C1-10 + ME221-C1-61 + ME221-C1-89 + ME221-C1-90 | GROUND CHASSIS + GROUND + GROUND + GROUND | ground | corroborated | |
| OEM-B-11 | Throttle position sensor (VTA) | analog_in | ME221-C1-26 | ANA VOLT 1 | analog_in | corroborated | |
| OEM-B-4 | Coolant temp (THW) | temp_in | ME221-C1-86 | ANA TEMP 1 | temp_in | corroborated | |
| OEM-B-6 | Primary O2 sensor (OX1) | lambda_nb_in | ME221-C1-56 | ANA VOLT 2 | analog_in | corroborated | |
| OEM-B-9 | Sensor ground (E1) | sensor_ground | ME221-C1-52 + ME221-C1-84 | SENSORS GROUND + Sensor Ground | sensor_ground | corroborated | |
| OEM-D-10 | A/C compressor request (A/C) | digital_in | ME221-C1-17 | ANA VOLT 3 | analog_in | single_source | |
| OEM-D-11 | Starter signal (STA) | digital_in | ME221-C1-18 | ANA VOLT 4 | analog_in | single_source | |
| OEM-D-12 | EFI main relay power (+B) | power_in | ME221-C1-15 + ME221-C1-64 | IGN +12V + VBAT | power_in | single_source | |
| OEM-D-13 | EFI main relay power (second feed) (+B1) | power_in | ME221-C1-15 + ME221-C1-64 | IGN +12V + VBAT | power_in | single_source | |
| OEM-D-2 | Karman-vortex AFM signal (KS) | digital_in | ME221-C1-6 | DIG_IN 1 | digital_in | single_source | |
| OEM-D-22 | Neutral start switch (NSW) | digital_in | — | — | — | single_source | |
| OEM-D-3 | Intake air temp (THA) | temp_in | ME221-C1-57 | ANA TEMP 2 | temp_in | single_source | |
| OEM-D-4 | EFI main relay control (M-REL) | low_side_out | ME221-C1-37 | LOW SIDE RELAY 11 | low_side_out | single_source | |
| OEM-D-5 | Knock sensor 1 (KNK1) | knock_in | ME221-C1-53 | KNOCK 1 SIGNAL | knock_in | single_source | |
| OEM-D-9 | Vehicle speed sensor (SPD) | digital_in | ME221-C1-7 | DIG_IN 2 | digital_in | corroborated |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-D-12 | SP-14V-1 | 0.85 | no route | EFI main relay power (+B) | — | |
| W2 | OEM-D-13 | SP-14V-1 | 0.85 | no route | EFI main relay power (second feed) (+B1) | — | |
| W3 | SP-14V-1 | ME221-C1-15 | 0.85 | no route | IGN +12V | — | |
| W4 | SP-14V-1 | ME221-C1-64 | 0.85 | no route | VBAT | — | |
| W5 | OEM-A-26 | SP-GND-1 | 0.85 | no route | Power ground (E01/E02) | — | |
| W6 | SP-GND-1 | ME221-C1-10 | 0.85 | no route | GROUND CHASSIS | — | |
| W7 | SP-GND-1 | ME221-C1-61 | 0.85 | no route | GROUND | — | |
| W8 | SP-GND-1 | ME221-C1-89 | 0.85 | no route | GROUND | — | |
| W9 | SP-GND-1 | ME221-C1-90 | 0.85 | no route | GROUND | — | |
| W10 | OEM-B-9 | SP-0V-1 | 0.5 | no route | Sensor ground (E1) | — | |
| W11 | SP-0V-1 | ME221-C1-52 | 0.5 | no route | SENSORS GROUND | — | |
| W12 | SP-0V-1 | ME221-C1-84 | 0.5 | no route | Sensor Ground | — | |
| W13 | OEM-D-5 | ME221-C1-53 | 0.5 | no route | Knock sensor 1 (KNK1) | — | |
| W14 | OEM-A-12 | ME221-C1-63 | 0.5 | no route | Injectors 1 & 4 (No.10) | — | |
| W15 | OEM-A-11 | ME221-C1-4 | 0.5 | no route | Injectors 2 & 6 (No.20) | — | |
| W16 | OEM-A-25 | ME221-C1-33 | 0.5 | no route | Injectors 3 & 5 (No.30) | — | |
| W17 | OEM-D-4 | ME221-C1-37 | 0.5 | no route | EFI main relay control (M-REL) | — | |
| W18 | OEM-B-11 | ME221-C1-26 | 0.5 | no route | Throttle position sensor (VTA) | — | |
| W19 | OEM-B-4 | ME221-C1-86 | 0.5 | no route | Coolant temp (THW) | — | |
| W20 | OEM-D-2 | ME221-C1-6 | 0.5 | no route | Karman-vortex AFM signal (KS) | — | |
| W21 | OEM-B-6 | ME221-C1-56 | 0.5 | no route | Primary O2 sensor (OX1) | — | |
| W22 | OEM-D-3 | ME221-C1-57 | 0.5 | no route | Intake air temp (THA) | — | |
| W23 | OEM-D-9 | ME221-C1-7 | 0.5 | no route | Vehicle speed sensor (SPD) | — | |
| W24 | OEM-D-10 | ME221-C1-17 | 0.5 | no route | A/C compressor request (A/C) | — | |
| W25 | OEM-D-11 | ME221-C1-18 | 0.5 | no route | Starter signal (STA) | — |
Bill of materials
| Category | Part number | Manufacturer | Description | Qty | Unit |
|---|
ECU setup sheet
| Role | Engine ref | Engine signal | Sensor | ECU point | ECU function | ECU class | Setup flag |
|---|---|---|---|---|---|---|---|
| No configured channels. | |||||||
Findings
Open (5)
| Severity | Code | Subject | Message |
|---|---|---|---|
| warn | INJECTOR_BALLAST | ME221 | The 7M-GTE injectors (7M-GTE fuel injector) are low-impedance, but ME221 drives saturated (high-Z) injectors only. Add a ballast resistor pack in series with each injector, or use an ECU with low-Z / peak-and-hold injector drivers. |
| warn | NET_FAMILY | OEM-D-10 ↔ ME221-C1-17 | OEM-D-10 "A/C compressor request (A/C)" [digital_in] is wired to ME221-C1-17 "ANA VOLT 3" [analog_in]. Analog and digital on one net. A switch on an analog input works with a pull-up and a threshold; an analog sensor on a digital input loses its value. |
| warn | NET_FAMILY | OEM-D-11 ↔ ME221-C1-18 | OEM-D-11 "Starter signal (STA)" [digital_in] is wired to ME221-C1-18 "ANA VOLT 4" [analog_in]. Analog and digital on one net. A switch on an analog input works with a pull-up and a threshold; an analog sensor on a digital input loses its value. |
| warn | NO_FUEL_PUMP | fuel pump | This engine harness has no fuel-pump control path: no fuel-pump relay output is wired to the new ECU. If the stock car switches the pump outside the ECU (an airflow-meter contact or a separate module), the standalone must drive the pump relay itself — see the install notes for this car. |
| info | UNMAPPED | OEM | 1 optional OEM pins are not mapped: OEM-D-22 Neutral start switch (NSW) |
Accepted (0)
| Code | Subject | Reason | By |
|---|
Notes
Fit check: needs add-on. Resolve these before building: - Low-impedance injectors need peak-hold drivers or ballast resistors - Trigger pattern for Toyota 7M-GTE not found in the ECU's docs (Trigger-pattern list published in MEITE Online Help "Currently Supported Triggers" (2019): generic 36-1, 60-2, 12-1, 36-2, 24-1, 24-2 + OEM (Zetec, MX5 NA/NB/NC, Duratec, Subaru 6/7, RB 360, Denso 24+3, K20/K24, Rover T/K, ST150, VW 20VT, 1UZ, Clio 197). Pattern not listed -> genuinely not supported.) - Only 4 ignition outputs for 6 cylinders: wasted spark (pair coils per firing order) - Only 4 injector outputs for 6 injectors: batch / semi-sequential injection Auto-mapped by auto_map() from the library pin data on 2026-10-23. Review every wire against both manuals before building. Open items: - Fuel-pump control: Motorsport Electronics ME221 needs to drive the fuel pump, but the stock ECU has no fuel-pump output (an airflow-meter contact or a separate module runs it) and the ECU has no fuel-pump output pin to wire — add a fuel-pump relay on a spare low-side output, see the install notes for this car. Not wired: - OEM-D 22: Neutral start switch (NSW): no free switch_in/frequency_in/analog_0_5 on Motorsport Electronics ME221
Sources
| Reliability | Kind | Title | URL | Archive | Captured | SHA-256 |
|---|---|---|---|---|---|---|
| 5 | oem_wiring_diagram | Toyota Supra A70 (MA70) 1990 EWD — TCCS (7M-GTE) System Circuit | — | — | — | — |
| 4 | vendor_doc | Motorsport Electronics GEN2 ME221/ME360/ME442 wire-in pinout | https://motorsport-electronics.co.uk/onlinehelp/html/ME442ME360ME221GEN2Wire-InPinout.html | — | — | — |
| 4 | vendor_doc | Toyota 7M-GTE EFI manual — "Terminals of ECU" (complete terminal list, no pin numbers) | http://shoarmateam.nl/upload/Toyota-Other/Cressida/MX83/efi%20system%20+%20WIRING/toyota-7m-manual-efi-fi%5b1%5d.pdf | — | — | — |
| 2 | forum | AllPinouts: 1989–1992 Toyota Supra ECU | https://allpinouts.org/pinouts/connectors/car/1989-1992-toyota-supra-ecu/ | — | — | — |