Toyota Mark II JZX90 1992-96 (1JZ-GTE, non-VVT) → FuelTech FT450 (auto)
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 | 6: read the Findings page before cutting any wire |
| Size of the job | 35 wires · 8 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-C86-22 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | OEM-C86-23 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | SP-14V-1 | FT450-A-A13 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | OEM-C85-16 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-C88-28 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-C88-33 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | OEM-C88-34 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | SP-GND-1 | FT450-A-A7 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | OEM-C84-11 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | OEM-C84-17 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | OEM-C84-22 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | OEM-C84-6 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | SP-0V-1 | FT450-A-A12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-C84-1 | FT450-A-A14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-C84-5 | FT450-A-A18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | SP-0V-1 | FT450-A-A18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-C84-10 | FT450-A-A17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-C88-24 | FT450-A-A8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-C88-16 | FT450-A-A9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-C88-15 | FT450-A-A10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-C88-26 | FT450-A-A11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-C88-10 | FT450-A-A1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-C88-9 | FT450-A-A2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-C88-8 | FT450-A-A1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-C84-8 | FT450-A-A23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-C84-7 | FT450-A-A20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-C84-20 | FT450-A-A24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-C85-2 | FT450-A-A6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-C86-5 | FT450-A-A3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-C88-3 | FT450-A-A4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-C88-11 | FT450-A-A5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-C84-12 | FT450-A-A21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-C84-13 | FT450-A-A22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-C84-14 | FT450-A-A26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-C86-13 | FT450-A-A25 | 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 | FT450-A-A14 | FT450-A-A12 | open (OL) | 5 V sensor reference must not touch sensor ground | |
| 2 | FT450-A-A12 | FT450-A-A13 | open (OL) | sensor ground must not touch +12 V supply | |
| 3 | FT450-A-A14 | FT450-A-A13 | open (OL) | 5 V sensor reference must not touch +12 V supply | |
| 4 | FT450-A-A7 | FT450-A-A13 | open (OL) | power ground must not touch +12 V supply | |
| 5 | FT450-A-A7 | FT450-A-A14 | open (OL) | power ground must not touch 5 V sensor reference |
If any reading doesn't match, stop and get help before powering up.
Revisions
| Rev | Label | By | Date |
|---|---|---|---|
| No revisions yet. | |||
Schematic
Connectors
FT450-A
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A1 | Injector 1 (Bank A) | — | W22 | — | 0.5 | OEM-C88-10 | — | — | — |
| A1 | Injector 1 (Bank A) | — | W24 | — | 0.5 | OEM-C88-8 | — | — | — |
| A10 | Ignition 3 | — | W20 | — | 0.5 | OEM-C88-15 | — | — | — |
| A11 | Ignition 4 | — | W21 | — | 0.5 | OEM-C88-26 | — | — | — |
| A12 | Signal ground | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| A13 | +12V switched | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| A14 | +5V sensor supply | — | W14 | — | 0.5 | OEM-C84-1 | — | — | — |
| A15 | CAN A LOW | — | — | — | — | — | — | — | — |
| A16 | CAN A HIGH | — | — | — | — | — | — | — | — |
| A17 | Phase input (cam) | — | W17 | — | 0.5 | OEM-C84-10 | — | — | — |
| A18 | RPM reference (crank -) | — | W15 | — | 0.5 | OEM-C84-5 | — | — | — |
| A18 | RPM reference (crank -) | — | W16 | — | 0.5 | SP-0V-1 | — | — | — |
| A19 | RPM signal (crank +) | — | — | — | — | — | — | — | — |
| A2 | Injector 2 (Bank A) | — | W23 | — | 0.5 | OEM-C88-9 | — | — | — |
| A20 | White input 1 | — | W26 | — | 0.5 | OEM-C84-7 | — | — | — |
| A21 | White input 2 | — | W32 | — | 0.5 | OEM-C84-12 | — | — | — |
| A22 | White input 3 (TPS) | — | W33 | — | 0.5 | OEM-C84-13 | — | — | — |
| A23 | White input 4 (oil pressure) | — | W25 | — | 0.5 | OEM-C84-8 | — | — | — |
| A24 | White input 5 (water temp) | — | W27 | — | 0.5 | OEM-C84-20 | — | — | — |
| A25 | White input 6 (fuel pressure) | — | W35 | — | 0.5 | OEM-C86-13 | — | — | — |
| A26 | White input 7 (air temp) | — | W34 | — | 0.5 | OEM-C84-14 | — | — | — |
| A3 | Aux 1 | — | W29 | — | 0.5 | OEM-C86-5 | — | — | — |
| A4 | Aux 2 | — | W30 | — | 0.5 | OEM-C88-3 | — | — | — |
| A5 | Aux 3 | — | W31 | — | 0.5 | OEM-C88-11 | — | — | — |
| A6 | Aux 4 (fuel pump / relays) | — | W28 | — | 0.5 | OEM-C85-2 | — | — | — |
| A7 | Power ground | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| A8 | Ignition 1 | — | W18 | — | 0.5 | OEM-C88-24 | — | — | — |
| A9 | Ignition 2 | — | W19 | — | 0.5 | OEM-C88-16 | — | — | — |
OEM-C84
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Sensor supply +5V (VCC) | — | W14 | — | 0.5 | FT450-A-A14 | — | — | — |
| 10 | Cam position 1 (G1) | — | W17 | — | 0.5 | FT450-A-A17 | — | — | — |
| 11 | Cam 1 return (G1-) | — | W9 | — | 0.5 | SP-0V-1 | — | — | — |
| 12 | TRAC throttle position (VTA2) | — | W32 | — | 0.5 | FT450-A-A21 | — | — | — |
| 13 | O2 sensor (OX1) | — | W33 | — | 0.5 | FT450-A-A22 | — | — | — |
| 14 | Intake air temperature (THA) | — | W34 | — | 0.5 | FT450-A-A26 | — | — | — |
| 15 | OD direct-clutch speed sensor (NCO+) | — | — | — | — | — | — | — | — |
| 16 | Cam position 2 (G2) | — | — | — | — | — | — | — | — |
| 17 | Cam 2 return (G2-) | — | W10 | — | 0.5 | SP-0V-1 | — | — | — |
| 20 | Coolant temperature (THW) | — | W27 | — | 0.5 | FT450-A-A24 | — | — | — |
| 22 | Sensor ground (E2) | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| 3 | OD direct-clutch speed sensor (NCO-) | — | — | — | — | — | — | — | — |
| 4 | No.2 speed sensor (SP2-) | — | — | — | — | — | — | — | — |
| 5 | Crank position (NE) | — | W15 | — | 0.5 | FT450-A-A18 | — | — | — |
| 6 | Crank sensor return (NE-) | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| 7 | Throttle position (VTA1) | — | W26 | — | 0.5 | FT450-A-A20 | — | — | — |
| 8 | Manifold pressure (PIM) | — | W25 | — | 0.5 | FT450-A-A23 | — | — | — |
| 9 | No.2 speed sensor (SP2+) | — | — | — | — | — | — | — | — |
OEM-C85
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Slave engine speed (NEO) | — | — | — | — | — | — | — | — |
| 10 | Fuel pump diagnostic (DI) | — | — | — | — | — | — | — | — |
| 11 | Slave TRAC throttle position (VTO2) | — | — | — | — | — | — | — | — |
| 14 | ABS active (MT only) | — | — | — | — | — | — | — | — |
| 16 | Power ground (E1) | — | W4 | — | 0.85 | SP-GND-1 | — | — | — |
| 2 | EFI main relay control (M-REL) | — | W28 | — | 0.5 | FT450-A-A6 | — | — | — |
| 3 | Check-engine lamp (W) | — | — | — | — | — | — | — | — |
| 4 | Fuel pump control (FPC) | — | — | — | — | — | — | — | — |
| 5 | Diagnostic test 1 (TE1) | — | — | — | — | — | — | — | — |
| 6 | Timing retard (TR) | — | — | — | — | — | — | — | — |
| 7 | Slave throttle position (VTO1) | — | — | — | — | — | — | — | — |
OEM-C86
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Diagnostic test terminal (TT) | — | — | — | — | — | — | — | — |
| 10 | A/T 2nd-gear indicator (2) | — | — | — | — | — | — | — | — |
| 11 | Diagnostic test 2 (TE2) | — | — | — | — | — | — | — | — |
| 12 | No.1 speed sensor (SP1) | — | — | — | — | — | — | — | — |
| 13 | Cat temperature sensor (CCO) | — | W35 | — | 0.5 | FT450-A-A25 | — | — | — |
| 14 | Battery constant (BATT) | — | — | — | — | — | — | — | — |
| 17 | A/T throttle position (L3) | — | — | — | — | — | — | — | — |
| 18 | A/T throttle position (L2) | — | — | — | — | — | — | — | — |
| 19 | A/T throttle position (L1) | — | — | — | — | — | — | — | — |
| 2 | A/T low-gear indicator (L) | — | — | — | — | — | — | — | — |
| 20 | A/C request (A/C) | — | — | — | — | — | — | — | — |
| 22 | EFI main relay power (+B) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| 23 | EFI main relay power (+B1) | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 25 | Stop light switch (STP) | — | — | — | — | — | — | — | — |
| 28 | Electrical load sense (ELS) | — | — | — | — | — | — | — | — |
| 3 | A/T power/normal mode (P) | — | — | — | — | — | — | — | — |
| 5 | A/C clutch relay (ACMG) | — | W29 | — | 0.5 | FT450-A-A3 | — | — | — |
| 6 | A/T overdrive disable 2 (OD2) | — | — | — | — | — | — | — | — |
| 7 | A/T overdrive disable 1 (OD1) | — | — | — | — | — | — | — | — |
| 8 | Cat temp warning light (EGW) | — | — | — | — | — | — | — | — |
| 9 | Ignition switch (IGSW) | — | — | — | — | — | — | — | — |
OEM-C88
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 10 | Injector 1 (#10, cyl 1&4) | — | W22 | — | 0.5 | FT450-A-A1 | — | — | — |
| 11 | A/T shift solenoid 1 (S1) | — | W31 | — | 0.5 | FT450-A-A5 | — | — | — |
| 12 | Igniter feedback (IGF) | — | — | — | — | — | — | — | — |
| 13 | Starter signal (STA) | — | — | — | — | — | — | — | — |
| 14 | Neutral/park switch (NSW) | — | — | — | — | — | — | — | — |
| 15 | Ignition 3 (IGT3) | — | W20 | — | 0.5 | FT450-A-A10 | — | — | — |
| 16 | Ignition 2 (IGT2) | — | W19 | — | 0.5 | FT450-A-A9 | — | — | — |
| 17 | A/T shift solenoid 2 (S2) | — | — | — | — | — | — | — | — |
| 19 | Voltage feedback (VF) | — | — | — | — | — | — | — | — |
| 20 | ISC stepper coil 4 (ISCV4) | — | — | — | — | — | — | — | — |
| 21 | ISC stepper coil 3 (ISCV3) | — | — | — | — | — | — | — | — |
| 22 | ISC stepper coil 2 (ISCV2) | — | — | — | — | — | — | — | — |
| 23 | ISC stepper coil 1 (ISCV1) | — | — | — | — | — | — | — | — |
| 24 | Ignition 1 (IGT1) | — | W18 | — | 0.5 | FT450-A-A8 | — | — | — |
| 26 | Ignition 4 (IGT4) | — | W21 | — | 0.5 | FT450-A-A11 | — | — | — |
| 27 | A/T lock-up solenoid (S3) | — | — | — | — | — | — | — | — |
| 28 | Power ground (E11) | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| 29 | Ignition 6 (IGT6) | — | — | — | — | — | — | — | — |
| 3 | O2 heater (HT) | — | W30 | — | 0.5 | FT450-A-A4 | — | — | — |
| 30 | Ignition 5 (IGT5) | — | — | — | — | — | — | — | — |
| 31 | TRAC throttle idle switch (IDL2) | — | — | — | — | — | — | — | — |
| 32 | TPS idle switch (IDL1) | — | — | — | — | — | — | — | — |
| 33 | Power ground (E02) | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| 34 | Power ground (E01) | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 4 | Knock sensor 2 (KNK2, rear) | — | — | — | — | — | — | — | — |
| 5 | Knock sensor 1 (KNK1, front) | — | — | — | — | — | — | — | — |
| 7 | EVAP purge VSV | — | — | — | — | — | — | — | — |
| 8 | Injector 3 (#30, cyl 2&6) | — | W24 | — | 0.5 | FT450-A-A1 | — | — | — |
| 9 | Injector 2 (#20, cyl 3&5) | — | W23 | — | 0.5 | FT450-A-A2 | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W9 | — | 0.5 | OEM-C84-11 | — | — | — |
| 1 | — | — | W10 | — | 0.5 | OEM-C84-17 | — | — | — |
| 1 | — | — | W11 | — | 0.5 | OEM-C84-22 | — | — | — |
| 1 | — | — | W12 | — | 0.5 | OEM-C84-6 | — | — | — |
| 1 | — | — | W13 | — | 0.5 | FT450-A-A12 | — | — | — |
| 1 | — | — | W16 | — | 0.5 | FT450-A-A18 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-C86-22 | — | — | — |
| 1 | — | — | W2 | — | 0.85 | OEM-C86-23 | — | — | — |
| 1 | — | — | W3 | — | 0.85 | FT450-A-A13 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W4 | — | 0.85 | OEM-C85-16 | — | — | — |
| 1 | — | — | W5 | — | 0.85 | OEM-C88-28 | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-C88-33 | — | — | — |
| 1 | — | — | W7 | — | 0.85 | OEM-C88-34 | — | — | — |
| 1 | — | — | W8 | — | 0.85 | FT450-A-A7 | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-C84-1 | Sensor supply +5V (VCC) | vref | FT450-A-A14 | +5V sensor supply | vref | single_source | |
| OEM-C84-10 | Cam position 1 (G1) | trigger_in | FT450-A-A17 | Phase input (cam) | trigger_in | single_source | |
| OEM-C84-11 | Cam 1 return (G1-) | sensor_ground | FT450-A-A12 + FT450-A-A18 | Signal ground + RPM reference (crank -) | sensor_ground + trigger_in | single_source | |
| OEM-C84-12 | TRAC throttle position (VTA2) | analog_in | FT450-A-A21 | White input 2 | analog_in | single_source | |
| OEM-C84-13 | O2 sensor (OX1) | lambda_nb_in | FT450-A-A22 | White input 3 (TPS) | analog_in | single_source | |
| OEM-C84-14 | Intake air temperature (THA) | temp_in | FT450-A-A26 | White input 7 (air temp) | temp_in | single_source | |
| OEM-C84-15 | OD direct-clutch speed sensor (NCO+) | digital_in | — | — | — | single_source | |
| OEM-C84-16 | Cam position 2 (G2) | trigger_in | — | — | — | single_source | |
| OEM-C84-17 | Cam 2 return (G2-) | sensor_ground | FT450-A-A12 + FT450-A-A18 | Signal ground + RPM reference (crank -) | sensor_ground + trigger_in | single_source | |
| OEM-C84-20 | Coolant temperature (THW) | temp_in | FT450-A-A24 | White input 5 (water temp) | temp_in | single_source | |
| OEM-C84-22 | Sensor ground (E2) | sensor_ground | FT450-A-A12 + FT450-A-A18 | Signal ground + RPM reference (crank -) | sensor_ground + trigger_in | single_source | |
| OEM-C84-3 | OD direct-clutch speed sensor (NCO-) | digital_in | — | — | — | single_source | |
| OEM-C84-4 | No.2 speed sensor (SP2-) | digital_in | — | — | — | single_source | |
| OEM-C84-5 | Crank position (NE) | trigger_in | FT450-A-A12 + FT450-A-A18 | Signal ground + RPM reference (crank -) | sensor_ground + trigger_in | single_source | |
| OEM-C84-6 | Crank sensor return (NE-) | sensor_ground | FT450-A-A12 + FT450-A-A18 | Signal ground + RPM reference (crank -) | sensor_ground + trigger_in | single_source | |
| OEM-C84-7 | Throttle position (VTA1) | analog_in | FT450-A-A20 | White input 1 | analog_in | single_source | |
| OEM-C84-8 | Manifold pressure (PIM) | analog_in | FT450-A-A23 | White input 4 (oil pressure) | analog_in | single_source | |
| OEM-C84-9 | No.2 speed sensor (SP2+) | digital_in | — | — | — | single_source | |
| OEM-C85-1 | Slave engine speed (NEO) | digital_in | — | — | — | single_source | |
| OEM-C85-10 | Fuel pump diagnostic (DI) | digital_in | — | — | — | single_source | |
| OEM-C85-11 | Slave TRAC throttle position (VTO2) | analog_out | — | — | — | single_source | |
| OEM-C85-14 | ABS active (MT only) | digital_in | — | — | — | single_source | |
| OEM-C85-16 | Power ground (E1) | ground | FT450-A-A7 | Power ground | ground | single_source | |
| OEM-C85-2 | EFI main relay control (M-REL) | low_side_out | FT450-A-A6 | Aux 4 (fuel pump / relays) | low_side_out | single_source | |
| OEM-C85-3 | Check-engine lamp (W) | low_side_out | — | — | — | single_source | |
| OEM-C85-4 | Fuel pump control (FPC) | low_side_out | — | — | — | single_source | |
| OEM-C85-5 | Diagnostic test 1 (TE1) | digital_in | — | — | — | single_source | |
| OEM-C85-6 | Timing retard (TR) | digital_in | — | — | — | single_source | |
| OEM-C85-7 | Slave throttle position (VTO1) | analog_out | — | — | — | single_source | |
| OEM-C86-1 | Diagnostic test terminal (TT) | digital_in | — | — | — | single_source | |
| OEM-C86-10 | A/T 2nd-gear indicator (2) | digital_in | — | — | — | single_source | |
| OEM-C86-11 | Diagnostic test 2 (TE2) | digital_in | — | — | — | single_source | |
| OEM-C86-12 | No.1 speed sensor (SP1) | digital_in | — | — | — | single_source | |
| OEM-C86-13 | Cat temperature sensor (CCO) | temp_in | FT450-A-A25 | White input 6 (fuel pressure) | analog_in | single_source | |
| OEM-C86-14 | Battery constant (BATT) | power_in | — | — | — | single_source | |
| OEM-C86-17 | A/T throttle position (L3) | digital_in | — | — | — | single_source | |
| OEM-C86-18 | A/T throttle position (L2) | digital_in | — | — | — | single_source | |
| OEM-C86-19 | A/T throttle position (L1) | digital_in | — | — | — | single_source | |
| OEM-C86-2 | A/T low-gear indicator (L) | digital_in | — | — | — | single_source | |
| OEM-C86-20 | A/C request (A/C) | digital_in | — | — | — | single_source | |
| OEM-C86-22 | EFI main relay power (+B) | power_in | FT450-A-A13 | +12V switched | power_in | single_source | |
| OEM-C86-23 | EFI main relay power (+B1) | power_in | FT450-A-A13 | +12V switched | power_in | single_source | |
| OEM-C86-25 | Stop light switch (STP) | digital_in | — | — | — | single_source | |
| OEM-C86-28 | Electrical load sense (ELS) | digital_in | — | — | — | single_source | |
| OEM-C86-3 | A/T power/normal mode (P) | digital_in | — | — | — | single_source | |
| OEM-C86-5 | A/C clutch relay (ACMG) | low_side_out | FT450-A-A3 | Aux 1 | low_side_out | single_source | |
| OEM-C86-6 | A/T overdrive disable 2 (OD2) | digital_in | — | — | — | single_source | |
| OEM-C86-7 | A/T overdrive disable 1 (OD1) | digital_in | — | — | — | single_source | |
| OEM-C86-8 | Cat temp warning light (EGW) | low_side_out | — | — | — | single_source | |
| OEM-C86-9 | Ignition switch (IGSW) | digital_in | — | — | — | single_source | |
| OEM-C88-10 | Injector 1 (#10, cyl 1&4) | injector_out | FT450-A-A1 | Injector 1 (Bank A) | injector_out | single_source | |
| OEM-C88-11 | A/T shift solenoid 1 (S1) | low_side_out | FT450-A-A5 | Aux 3 | low_side_out | single_source | |
| OEM-C88-12 | Igniter feedback (IGF) | digital_in | — | — | — | single_source | |
| OEM-C88-13 | Starter signal (STA) | digital_in | — | — | — | single_source | |
| OEM-C88-14 | Neutral/park switch (NSW) | digital_in | — | — | — | single_source | |
| OEM-C88-15 | Ignition 3 (IGT3) | ignition_out | FT450-A-A10 | Ignition 3 | ignition_out | single_source | |
| OEM-C88-16 | Ignition 2 (IGT2) | ignition_out | FT450-A-A9 | Ignition 2 | ignition_out | single_source | |
| OEM-C88-17 | A/T shift solenoid 2 (S2) | low_side_out | — | — | — | single_source | |
| OEM-C88-19 | Voltage feedback (VF) | analog_out | — | — | — | single_source | |
| OEM-C88-20 | ISC stepper coil 4 (ISCV4) | low_side_out | — | — | — | single_source | |
| OEM-C88-21 | ISC stepper coil 3 (ISCV3) | low_side_out | — | — | — | single_source | |
| OEM-C88-22 | ISC stepper coil 2 (ISCV2) | low_side_out | — | — | — | single_source | |
| OEM-C88-23 | ISC stepper coil 1 (ISCV1) | low_side_out | — | — | — | single_source | |
| OEM-C88-24 | Ignition 1 (IGT1) | ignition_out | FT450-A-A8 | Ignition 1 | ignition_out | single_source | |
| OEM-C88-26 | Ignition 4 (IGT4) | ignition_out | FT450-A-A11 | Ignition 4 | ignition_out | single_source | |
| OEM-C88-27 | A/T lock-up solenoid (S3) | low_side_out | — | — | — | single_source | |
| OEM-C88-28 | Power ground (E11) | ground | FT450-A-A7 | Power ground | ground | single_source | |
| OEM-C88-29 | Ignition 6 (IGT6) | ignition_out | — | — | — | single_source | |
| OEM-C88-3 | O2 heater (HT) | low_side_out | FT450-A-A4 | Aux 2 | low_side_out | single_source | |
| OEM-C88-30 | Ignition 5 (IGT5) | ignition_out | — | — | — | single_source | |
| OEM-C88-31 | TRAC throttle idle switch (IDL2) | digital_in | — | — | — | single_source | |
| OEM-C88-32 | TPS idle switch (IDL1) | digital_in | — | — | — | single_source | |
| OEM-C88-33 | Power ground (E02) | ground | FT450-A-A7 | Power ground | ground | single_source | |
| OEM-C88-34 | Power ground (E01) | ground | FT450-A-A7 | Power ground | ground | single_source | |
| OEM-C88-4 | Knock sensor 2 (KNK2, rear) | knock_in | — | — | — | single_source | |
| OEM-C88-5 | Knock sensor 1 (KNK1, front) | knock_in | — | — | — | single_source | |
| OEM-C88-7 | EVAP purge VSV | low_side_out | — | — | — | single_source | |
| OEM-C88-8 | Injector 3 (#30, cyl 2&6) | injector_out | FT450-A-A1 | Injector 1 (Bank A) | injector_out | single_source | |
| OEM-C88-9 | Injector 2 (#20, cyl 3&5) | injector_out | FT450-A-A2 | Injector 2 (Bank A) | injector_out | single_source |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-C86-22 | SP-14V-1 | 0.85 | no route | EFI main relay power (+B) | — | |
| W2 | OEM-C86-23 | SP-14V-1 | 0.85 | no route | EFI main relay power (+B1) | — | |
| W3 | SP-14V-1 | FT450-A-A13 | 0.85 | no route | +12V switched | — | |
| W4 | OEM-C85-16 | SP-GND-1 | 0.85 | no route | Power ground (E1) | — | |
| W5 | OEM-C88-28 | SP-GND-1 | 0.85 | no route | Power ground (E11) | — | |
| W6 | OEM-C88-33 | SP-GND-1 | 0.85 | no route | Power ground (E02) | — | |
| W7 | OEM-C88-34 | SP-GND-1 | 0.85 | no route | Power ground (E01) | — | |
| W8 | SP-GND-1 | FT450-A-A7 | 0.85 | no route | Power ground | — | |
| W9 | OEM-C84-11 | SP-0V-1 | 0.5 | no route | Cam 1 return (G1-) | — | |
| W10 | OEM-C84-17 | SP-0V-1 | 0.5 | no route | Cam 2 return (G2-) | — | |
| W11 | OEM-C84-22 | SP-0V-1 | 0.5 | no route | Sensor ground (E2) | — | |
| W12 | OEM-C84-6 | SP-0V-1 | 0.5 | no route | Crank sensor return (NE-) | — | |
| W13 | SP-0V-1 | FT450-A-A12 | 0.5 | no route | Signal ground | — | |
| W14 | OEM-C84-1 | FT450-A-A14 | 0.5 | no route | Sensor supply +5V (VCC) | — | |
| W15 | OEM-C84-5 | FT450-A-A18 | 0.5 | no route | Crank position (NE) | — | |
| W16 | SP-0V-1 | FT450-A-A18 | 0.5 | no route | RPM reference (crank -) | — | |
| W17 | OEM-C84-10 | FT450-A-A17 | 0.5 | no route | Cam position 1 (G1) | — | |
| W18 | OEM-C88-24 | FT450-A-A8 | 0.5 | no route | Ignition 1 (IGT1) | — | |
| W19 | OEM-C88-16 | FT450-A-A9 | 0.5 | no route | Ignition 2 (IGT2) | — | |
| W20 | OEM-C88-15 | FT450-A-A10 | 0.5 | no route | Ignition 3 (IGT3) | — | |
| W21 | OEM-C88-26 | FT450-A-A11 | 0.5 | no route | Ignition 4 (IGT4) | — | |
| W22 | OEM-C88-10 | FT450-A-A1 | 0.5 | no route | Injector 1 (#10, cyl 1&4) | — | |
| W23 | OEM-C88-9 | FT450-A-A2 | 0.5 | no route | Injector 2 (#20, cyl 3&5) | — | |
| W24 | OEM-C88-8 | FT450-A-A1 | 0.5 | no route | Injector 3 (#30, cyl 2&6) | — | |
| W25 | OEM-C84-8 | FT450-A-A23 | 0.5 | no route | Manifold pressure (PIM) | — | |
| W26 | OEM-C84-7 | FT450-A-A20 | 0.5 | no route | Throttle position (VTA1) | — | |
| W27 | OEM-C84-20 | FT450-A-A24 | 0.5 | no route | Coolant temperature (THW) | — | |
| W28 | OEM-C85-2 | FT450-A-A6 | 0.5 | no route | EFI main relay control (M-REL) | — | |
| W29 | OEM-C86-5 | FT450-A-A3 | 0.5 | no route | A/C clutch relay (ACMG) | — | |
| W30 | OEM-C88-3 | FT450-A-A4 | 0.5 | no route | O2 heater (HT) | — | |
| W31 | OEM-C88-11 | FT450-A-A5 | 0.5 | no route | A/T shift solenoid 1 (S1) | — | |
| W32 | OEM-C84-12 | FT450-A-A21 | 0.5 | no route | TRAC throttle position (VTA2) | — | |
| W33 | OEM-C84-13 | FT450-A-A22 | 0.5 | no route | O2 sensor (OX1) | — | |
| W34 | OEM-C84-14 | FT450-A-A26 | 0.5 | no route | Intake air temperature (THA) | — | |
| W35 | OEM-C86-13 | FT450-A-A25 | 0.5 | no route | Cat temperature sensor (CCO) | — |
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 (11)
| Severity | Code | Subject | Message |
|---|---|---|---|
| error | INJECTOR_BALLAST | FT450 | The 1JZ-GTE injectors (1JZ-GTE fuel injector) are low-impedance, but FT450 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. |
| error | NET_MERGED | FT450-A-A1 + OEM-C88-10 + OEM-C88-8 | 2 different OEM functions share one net: OEM-C88-10 Injector 1 (#10, cyl 1&4); OEM-C88-8 Injector 3 (#30, cyl 2&6) |
| error | REQUIRED_UNMAPPED | OEM-C84-16 | Required OEM function "Cam position 2 (G2)" (trigger_in) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-C86-9 | Required OEM function "Ignition switch (IGSW)" (digital_in) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-C88-29 | Required OEM function "Ignition 6 (IGT6)" (ignition_out) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-C88-30 | Required OEM function "Ignition 5 (IGT5)" (ignition_out) is not connected to the new ECU. |
| warn | LOAD_UNKNOWN | FT450-A-A3 | FT450-A-A3 "Aux 1" drives OEM-C86-5 A/C clutch relay (ACMG) (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | FT450-A-A6 | FT450-A-A6 "Aux 4 (fuel pump / relays)" drives OEM-C85-2 EFI main relay control (M-REL) (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| info | NET_FAMILY | OEM-C84-22 ↔ OEM-C84-5 | OEM-C84-22 "Sensor ground (E2)" [sensor_ground] is wired to OEM-C84-5 "Crank position (NE)" [trigger_in]. Trigger return tied to sensor/trigger ground: correct for single-ended trigger inputs. |
| info | NET_FAMILY | OEM-C86-13 ↔ FT450-A-A25 | OEM-C86-13 "Cat temperature sensor (CCO)" [temp_in] is wired to FT450-A-A25 "White input 6 (fuel pressure)" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| info | UNMAPPED | OEM | 43 optional OEM pins are not mapped: OEM-C84-15 OD direct-clutch speed sensor (NCO+); OEM-C84-3 OD direct-clutch speed sensor (NCO-); OEM-C84-4 No.2 speed sensor (SP2-); OEM-C84-9 No.2 speed sensor (SP2+); OEM-C85-1 Slave engine speed (NEO); OEM-C85-10 Fuel pump diagnostic (DI); OEM-C85-11 Slave TRAC throttle position (VTO2); OEM-C85-14 ABS active (MT only); OEM-C85-3 Check-engine lamp (W); OEM-C85-4 Fuel pump control (FPC); OEM-C85-5 Diagnostic test 1 (TE1); OEM-C85-6 Timing retard (TR); OEM-C85-7 Slave throttle position (VTO1); OEM-C86-1 Diagnostic test terminal (TT); OEM-C86-10 A/T 2nd-gear indicator (2); OEM-C86-11 Diagnostic test 2 (TE2); OEM-C86-12 No.1 speed sensor (SP1); OEM-C86-17 A/T throttle position (L3); OEM-C86-18 A/T throttle position (L2); OEM-C86-19 A/T throttle position (L1); OEM-C86-2 A/T low-gear indicator (L); OEM-C86-20 A/C request (A/C); OEM-C86-25 Stop light switch (STP); OEM-C86-28 Electrical load sense (ELS); OEM-C86-3 A/T power/normal mode (P); OEM-C86-6 A/T overdrive disable 2 (OD2); OEM-C86-7 A/T overdrive disable 1 (OD1); OEM-C86-8 Cat temp warning light (EGW); OEM-C88-12 Igniter feedback (IGF); OEM-C88-13 Starter signal (STA); OEM-C88-14 Neutral/park switch (NSW); OEM-C88-17 A/T shift solenoid 2 (S2); OEM-C88-19 Voltage feedback (VF); OEM-C88-20 ISC stepper coil 4 (ISCV4); OEM-C88-21 ISC stepper coil 3 (ISCV3); OEM-C88-22 ISC stepper coil 2 (ISCV2); OEM-C88-23 ISC stepper coil 1 (ISCV1); OEM-C88-27 A/T lock-up solenoid (S3); OEM-C88-31 TRAC throttle idle switch (IDL2); OEM-C88-32 TPS idle switch (IDL1); OEM-C88-4 Knock sensor 2 (KNK2, rear); OEM-C88-5 Knock sensor 1 (KNK1, front); OEM-C88-7 EVAP purge VSV |
Accepted (1)
| Code | Subject | Reason | By |
|---|---|---|---|
| REQUIRED_UNMAPPED | OEM-C86-14 | Battery-constant (memory) feed of the stock ECU: the new ECU has no such input, so it is not needed. | mapping-proposal |
Notes
Auto-mapped by auto_map() from the library pin data on 2026-10-11. Review every wire against both manuals before building. Open items: - OEM-C84 16: Cam position 2 (G2): no free cam_vr/cam_hall/frequency_in input on FuelTech FT450 - OEM-C88 30: Ignition 5 (IGT5): no free ignition output on FuelTech FT450 - OEM-C88 29: Ignition 6 (IGT6): no free ignition output on FuelTech FT450 - OEM-C86 9: Ignition switch (IGSW): key-on 12 V sense — optional in a swap (the main relay is energized from keyed 12 V, not from this pin); FuelTech FT450 has no dedicated key-on input Not wired: - OEM-C86 14: Battery constant (BATT): FuelTech FT450 has no battery-constant input; not needed - OEM-C88 5: Knock sensor 1 (KNK1, front): no free knock input on FuelTech FT450 - OEM-C88 4: Knock sensor 2 (KNK2, rear): no free knock input on FuelTech FT450 - OEM-C88 23: ISC stepper coil 1 (ISCV1): no free low_side/relay_control/heater_low_side/ls_hs/injector on FuelTech FT450 - OEM-C88 17: A/T shift solenoid 2 (S2): no free low_side/relay_control/heater_low_side/ls_hs/injector on FuelTech FT450 - OEM-C88 22: ISC stepper coil 2 (ISCV2): no free low_side/relay_control/heater_low_side/ls_hs/injector on FuelTech FT450 - OEM-C88 21: ISC stepper coil 3 (ISCV3): no free low_side/relay_control/heater_low_side/ls_hs/injector on FuelTech FT450 - OEM-C88 20: ISC stepper coil 4 (ISCV4): no free low_side/relay_control/heater_low_side/ls_hs/injector on FuelTech FT450 - OEM-C85 3: Check-engine lamp (W): no free low_side/relay_control/heater_low_side/ls_hs/injector on FuelTech FT450 - OEM-C85 4: Fuel pump control (FPC): no free low_side/relay_control/heater_low_side/ls_hs/injector on FuelTech FT450 - OEM-C86 8: Cat temp warning light (EGW): no free low_side/relay_control/heater_low_side/ls_hs/injector on FuelTech FT450 - OEM-C88 27: A/T lock-up solenoid (S3): no free low_side/relay_control/heater_low_side/ls_hs/injector on FuelTech FT450 - OEM-C88 7: EVAP purge VSV: no free low_side/relay_control/heater_low_side/ls_hs/injector on FuelTech FT450 - OEM-C86 12: No.1 speed sensor (SP1): no free frequency_in/switch_in on FuelTech FT450 - OEM-C84 4: No.2 speed sensor (SP2-): no free frequency_in/switch_in on FuelTech FT450 - OEM-C84 9: No.2 speed sensor (SP2+): no free frequency_in/switch_in on FuelTech FT450 - OEM-C84 15: OD direct-clutch speed sensor (NCO+): no free frequency_in/switch_in on FuelTech FT450 - OEM-C84 3: OD direct-clutch speed sensor (NCO-): no free frequency_in/switch_in on FuelTech FT450 - OEM-C85 1: Slave engine speed (NEO): no free frequency_in/switch_in on FuelTech FT450 - OEM-C85 10: Fuel pump diagnostic (DI): no free frequency_in/switch_in on FuelTech FT450 - OEM-C88 12: Igniter feedback (IGF): no free frequency_in/switch_in on FuelTech FT450 - OEM-C85 5: Diagnostic test 1 (TE1): no free switch_in/frequency_in/analog_0_5 on FuelTech FT450 - OEM-C86 7: A/T overdrive disable 1 (OD1): no free switch_in/frequency_in/analog_0_5 on FuelTech FT450 - OEM-C86 10: A/T 2nd-gear indicator (2): no free switch_in/frequency_in/analog_0_5 on FuelTech FT450 - OEM-C86 11: Diagnostic test 2 (TE2): no free switch_in/frequency_in/analog_0_5 on FuelTech FT450 - OEM-C86 6: A/T overdrive disable 2 (OD2): no free switch_in/frequency_in/analog_0_5 on FuelTech FT450 - OEM-C85 14: ABS active (MT only): no free switch_in/frequency_in/analog_0_5 on FuelTech FT450 - OEM-C85 6: Timing retard (TR): no free switch_in/frequency_in/analog_0_5 on FuelTech FT450 - OEM-C86 1: Diagnostic test terminal (TT): no free switch_in/frequency_in/analog_0_5 on FuelTech FT450 - OEM-C86 17: A/T throttle position (L3): no free switch_in/frequency_in/analog_0_5 on FuelTech FT450 - OEM-C86 18: A/T throttle position (L2): no free switch_in/frequency_in/analog_0_5 on FuelTech FT450 - OEM-C86 19: A/T throttle position (L1): no free switch_in/frequency_in/analog_0_5 on FuelTech FT450 - OEM-C86 2: A/T low-gear indicator (L): no free switch_in/frequency_in/analog_0_5 on FuelTech FT450 - OEM-C86 20: A/C request (A/C): no free switch_in/frequency_in/analog_0_5 on FuelTech FT450 - OEM-C86 25: Stop light switch (STP): no free switch_in/frequency_in/analog_0_5 on FuelTech FT450 - OEM-C86 28: Electrical load sense (ELS): no free switch_in/frequency_in/analog_0_5 on FuelTech FT450 - OEM-C86 3: A/T power/normal mode (P): no free switch_in/frequency_in/analog_0_5 on FuelTech FT450 - OEM-C88 13: Starter signal (STA): no free switch_in/frequency_in/analog_0_5 on FuelTech FT450 - OEM-C88 14: Neutral/park switch (NSW): no free switch_in/frequency_in/analog_0_5 on FuelTech FT450 - OEM-C88 31: TRAC throttle idle switch (IDL2): no free switch_in/frequency_in/analog_0_5 on FuelTech FT450 - OEM-C88 32: TPS idle switch (IDL1): no free switch_in/frequency_in/analog_0_5 on FuelTech FT450 - OEM-C85 11: Slave TRAC throttle position (VTO2): no free analog_out on FuelTech FT450 - OEM-C85 7: Slave throttle position (VTO1): no free analog_out on FuelTech FT450 - OEM-C88 19: Voltage feedback (VF): no free analog_out on FuelTech FT450
Sources
| Reliability | Kind | Title | URL | Archive | Captured | SHA-256 |
|---|---|---|---|---|---|---|
| 4 | vendor_doc | FuelTech FT450/FT550 ready harness manual (4 & 6 cylinder) — FT450 Connector A pinout | http://ftmanager.fueltech.com.br/downloads/manual/Portugues/Chicote_pronto_FT450-FT550.pdf | — | — | — |
| 2 | community_copy | wilbo666: 1JZ-GTE pinout (JZZ30 Soarer page, shared 1JZ-GTE engine/ECU) | http://wilbo666.pbworks.com/w/page/47216384/1JZ-GTE%20JZZ30%20Soarer | — | — | — |