Lexus IS300 (XE10 / JCE10) 2001-05 2JZ-GE VVT-i → MaxxECU MaxxECU MINI REV10+ (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 | 7: read the Findings page before cutting any wire |
| Size of the job | 37 wires · 10 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-E2-13 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | OEM-E3-16 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | OEM-E3-7 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | OEM-E3-8 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | SP-14V-1 | MAXXECUMINI-C1-H4 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-E6-17 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | OEM-E7-21 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | SP-GND-1 | MAXXECUMINI-C1-G4 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | OEM-E6-18 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | OEM-E6-19 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | OEM-E7-22 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | SP-0V-1 | MAXXECUMINI-C1-A2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | SP-0V-1 | MAXXECUMINI-C1-B3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | SP-0V-1 | MAXXECUMINI-C1-B4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | SP-0V-1 | MAXXECUMINI-C1-D4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-E6-2 | MAXXECUMINI-C1-E2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-E7-23 | MAXXECUMINI-C1-A1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-E7-11 | MAXXECUMINI-C1-F1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-E7-12 | MAXXECUMINI-C1-F2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-E7-13 | MAXXECUMINI-C1-F3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-E6-5 | MAXXECUMINI-C1-G3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-E6-6 | MAXXECUMINI-C1-H1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-E7-1 | MAXXECUMINI-C1-H2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-E7-2 | MAXXECUMINI-C1-H3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-E7-3 | MAXXECUMINI-C1-G3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-E7-4 | MAXXECUMINI-C1-H1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-E7-17 | MAXXECUMINI-C1-G2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-E7-18 | MAXXECUMINI-C1-G1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-E7-19 | MAXXECUMINI-C1-E1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-E7-20 | MAXXECUMINI-C1-D1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-E6-15 | MAXXECUMINI-C1-D2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-E6-23 | MAXXECUMINI-C1-C3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-E6-16 | MAXXECUMINI-C1-C4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-E6-14 | MAXXECUMINI-C1-C1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-E6-22 | MAXXECUMINI-C1-C2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-E5-11 | MAXXECUMINI-C1-B1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-E5-5 | MAXXECUMINI-C1-B2 | 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 | MAXXECUMINI-C1-H4 | MAXXECUMINI-C1-A2 | open (OL) | +12 V supply must not touch sensor ground | |
| 2 | MAXXECUMINI-C1-H4 | MAXXECUMINI-C1-G4 | open (OL) | +12 V supply must not touch power ground | |
| 3 | MAXXECUMINI-C1-A2 | MAXXECUMINI-C1-E2 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 4 | MAXXECUMINI-C1-G4 | MAXXECUMINI-C1-E2 | open (OL) | power ground must not touch 5 V sensor reference | |
| 5 | MAXXECUMINI-C1-H4 | MAXXECUMINI-C1-E2 | open (OL) | +12 V supply 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
MAXXECUMINI-C1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A1 | TRIGGER | — | W17 | — | 0.5 | OEM-E7-23 | — | — | — |
| A2 | TRIGGER GND | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| B1 | DIN 1 (Hall only) | — | W36 | — | 0.5 | OEM-E5-11 | — | — | — |
| B2 | DIN 2 (Hall only) | — | W37 | — | 0.5 | OEM-E5-5 | — | — | — |
| B3 | SENSOR GND | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| B4 | SENSOR GND | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| C1 | CLT | — | W34 | — | 0.5 | OEM-E6-14 | — | — | — |
| C2 | IAT | — | W35 | — | 0.5 | OEM-E6-22 | — | — | — |
| C3 | AIN 3 (0-5V) | — | W32 | — | 0.5 | OEM-E6-23 | — | — | — |
| C4 | AIN 4 (0-5V) | — | W33 | — | 0.5 | OEM-E6-16 | — | — | — |
| D1 | GPO 8/TACHO | — | W30 | — | 0.5 | OEM-E7-20 | — | — | — |
| D2 | TPS | — | W31 | — | 0.5 | OEM-E6-15 | — | — | — |
| D3 | GND Shield | — | — | — | — | — | — | — | — |
| D4 | SENSOR GND | — | W15 | — | 0.5 | SP-0V-1 | — | — | — |
| E1 | GPO 3 | — | W29 | — | 0.5 | OEM-E7-19 | — | — | — |
| E2 | +5V sensor supply | — | W16 | — | 0.5 | OEM-E6-2 | — | — | — |
| E3 | CAN L | — | — | — | — | — | — | — | — |
| E4 | CAN H | — | — | — | — | — | — | — | — |
| F1 | IGN 1 | — | W18 | — | 0.5 | OEM-E7-11 | — | — | — |
| F2 | IGN 2 | — | W19 | — | 0.5 | OEM-E7-12 | — | — | — |
| F3 | IGN 3 | — | W20 | — | 0.5 | OEM-E7-13 | — | — | — |
| F4 | IGN 4 | — | — | — | — | — | — | — | — |
| G1 | GPO 2 | — | W28 | — | 0.5 | OEM-E7-18 | — | — | — |
| G2 | GPO 1 | — | W27 | — | 0.5 | OEM-E7-17 | — | — | — |
| G3 | INJ 1 | — | W21 | — | 0.5 | OEM-E6-5 | — | — | — |
| G3 | INJ 1 | — | W25 | — | 0.5 | OEM-E7-3 | — | — | — |
| G4 | ENGINE GND | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| H1 | INJ 2 | — | W22 | — | 0.5 | OEM-E6-6 | — | — | — |
| H1 | INJ 2 | — | W26 | — | 0.5 | OEM-E7-4 | — | — | — |
| H2 | INJ 3 | — | W23 | — | 0.5 | OEM-E7-1 | — | — | — |
| H3 | INJ 4 | — | W24 | — | 0.5 | OEM-E7-2 | — | — | — |
| H4 | +12V (ECU power supply) | — | W5 | — | 0.85 | SP-14V-1 | — | — | — |
OEM-E2
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 13 | ETCS power (TBP, throttle bypass) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| 24 | O2 right rear (OXR2) | — | — | — | — | — | — | — | — |
| 25 | O2 heater right rear (HTR2) | — | — | — | — | — | — | — | — |
| 26 | O2 heater left rear (HTL2) | — | — | — | — | — | — | — | — |
OEM-E3
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Battery constant (BATT) | — | — | — | — | — | — | — | — |
| 10 | EFI main relay control (MREL) | — | — | — | — | — | — | — | — |
| 11 | Serial diagnostic (SIL) | — | — | — | — | — | — | — | — |
| 16 | EFI main relay (+B) | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 4 | Fuel pump relay (FPR) | — | — | — | — | — | — | — | — |
| 5 | Fuel pump control (FC) | — | — | — | — | — | — | — | — |
| 6 | Check-engine lamp (W) | — | — | — | — | — | — | — | — |
| 7 | ETCS main relay (+BM) | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 8 | EFI main relay (+B2) | — | W4 | — | 0.85 | SP-14V-1 | — | — | — |
| 9 | Ignition switch (IGSW) | — | — | — | — | — | — | — | — |
OEM-E4
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 13 | A/C clutch relay (ACMG) | — | — | — | — | — | — | — | — |
| 18 | EVAP vapor pressure (PTNK) | — | — | — | — | — | — | — | — |
| 2 | Starter signal (STA) | — | — | — | — | — | — | — | — |
| 5 | Diagnostic/timing check (TC) | — | — | — | — | — | — | — | — |
| 6 | Stop light switch (STP) | — | — | — | — | — | — | — | — |
| 8 | O2 left rear (OXL2) | — | — | — | — | — | — | — | — |
OEM-E5
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 11 | Vehicle speed sensor (SP2-) | — | W36 | — | 0.5 | MAXXECUMINI-C1-B1 | — | — | — |
| 12 | Canister close valve (CCV) | — | — | — | — | — | — | — | — |
| 5 | Vehicle speed sensor (SP2+) | — | W37 | — | 0.5 | MAXXECUMINI-C1-B2 | — | — | — |
OEM-E6
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 10 | Mass air flow (VG) | — | — | — | — | — | — | — | — |
| 11 | O2 right front (OXR1) | — | — | — | — | — | — | — | — |
| 12 | O2 left front (OXL1) | — | — | — | — | — | — | — | — |
| 14 | Coolant temperature (THW) | — | W34 | — | 0.5 | MAXXECUMINI-C1-C1 | — | — | — |
| 15 | Accelerator pedal 1 (VPA) | — | W31 | — | 0.5 | MAXXECUMINI-C1-D2 | — | — | — |
| 16 | Accelerator pedal 2 (VPA2) | — | W33 | — | 0.5 | MAXXECUMINI-C1-C4 | — | — | — |
| 17 | Power ground (E1) | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| 18 | Sensor ground (E2) | — | W9 | — | 0.5 | SP-0V-1 | — | — | — |
| 19 | MAF ground (EVG) | — | W10 | — | 0.5 | SP-0V-1 | — | — | — |
| 2 | Sensor supply +5V (VC) | — | W16 | — | 0.5 | MAXXECUMINI-C1-E2 | — | — | — |
| 22 | Intake air temperature (THA) | — | W35 | — | 0.5 | MAXXECUMINI-C1-C2 | — | — | — |
| 23 | Throttle position 1 (VTA) | — | W32 | — | 0.5 | MAXXECUMINI-C1-C3 | — | — | — |
| 24 | Throttle position 2 (VTA2) | — | — | — | — | — | — | — | — |
| 3 | O2 heater right front (HTR) | — | — | — | — | — | — | — | — |
| 4 | O2 heater left front (HTL) | — | — | — | — | — | — | — | — |
| 5 | Injector 1 (#10) | — | W21 | — | 0.5 | MAXXECUMINI-C1-G3 | — | — | — |
| 6 | Injector 2 (#20) | — | W22 | — | 0.5 | MAXXECUMINI-C1-H1 | — | — | — |
| 7 | EVAP purge VSV (PRG) | — | — | — | — | — | — | — | — |
OEM-E7
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Injector 3 (#30) | — | W23 | — | 0.5 | MAXXECUMINI-C1-H2 | — | — | — |
| 10 | Cam position (G2) | — | — | — | — | — | — | — | — |
| 11 | Ignition 1 (IGT) | — | W18 | — | 0.5 | MAXXECUMINI-C1-F1 | — | — | — |
| 12 | Ignition 2 (IGT2) | — | W19 | — | 0.5 | MAXXECUMINI-C1-F2 | — | — | — |
| 13 | Ignition 3 (IGT3) | — | W20 | — | 0.5 | MAXXECUMINI-C1-F3 | — | — | — |
| 17 | VVT-i OCV - (OCV-) | — | W27 | — | 0.5 | MAXXECUMINI-C1-G2 | — | — | — |
| 18 | VVT-i OCV + (OCV+) | — | W28 | — | 0.5 | MAXXECUMINI-C1-G1 | — | — | — |
| 19 | ETCS throttle clutch - (CL-) | — | W29 | — | 0.5 | MAXXECUMINI-C1-E1 | — | — | — |
| 2 | Injector 4 (#40) | — | W24 | — | 0.5 | MAXXECUMINI-C1-H3 | — | — | — |
| 20 | ETCS throttle clutch + (CL+) | — | W30 | — | 0.5 | MAXXECUMINI-C1-D1 | — | — | — |
| 21 | Power ground (E01) | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 22 | Crank position return (NE-) | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| 23 | Crank position (NE) | — | W17 | — | 0.5 | MAXXECUMINI-C1-A1 | — | — | — |
| 25 | Igniter feedback (IGF) | — | — | — | — | — | — | — | — |
| 27 | Knock sensor 2 (KNK2) | — | — | — | — | — | — | — | — |
| 28 | Knock sensor 1 (KNK1) | — | — | — | — | — | — | — | — |
| 3 | Injector 5 (#50) | — | W25 | — | 0.5 | MAXXECUMINI-C1-G3 | — | — | — |
| 4 | Injector 6 (#60) | — | W26 | — | 0.5 | MAXXECUMINI-C1-H1 | — | — | — |
| 5 | ACIS intake VSV | — | — | — | — | — | — | — | — |
| 7 | ETCS throttle motor - (M-) | — | — | — | — | — | — | — | — |
| 8 | ETCS throttle motor + (M+) | — | — | — | — | — | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W9 | — | 0.5 | OEM-E6-18 | — | — | — |
| 1 | — | — | W10 | — | 0.5 | OEM-E6-19 | — | — | — |
| 1 | — | — | W11 | — | 0.5 | OEM-E7-22 | — | — | — |
| 1 | — | — | W12 | — | 0.5 | MAXXECUMINI-C1-A2 | — | — | — |
| 1 | — | — | W13 | — | 0.5 | MAXXECUMINI-C1-B3 | — | — | — |
| 1 | — | — | W14 | — | 0.5 | MAXXECUMINI-C1-B4 | — | — | — |
| 1 | — | — | W15 | — | 0.5 | MAXXECUMINI-C1-D4 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-E2-13 | — | — | — |
| 1 | — | — | W2 | — | 0.85 | OEM-E3-16 | — | — | — |
| 1 | — | — | W3 | — | 0.85 | OEM-E3-7 | — | — | — |
| 1 | — | — | W4 | — | 0.85 | OEM-E3-8 | — | — | — |
| 1 | — | — | W5 | — | 0.85 | MAXXECUMINI-C1-H4 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W6 | — | 0.85 | OEM-E6-17 | — | — | — |
| 1 | — | — | W7 | — | 0.85 | OEM-E7-21 | — | — | — |
| 1 | — | — | W8 | — | 0.85 | MAXXECUMINI-C1-G4 | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-E2-13 | ETCS power (TBP, throttle bypass) | power_in | MAXXECUMINI-C1-H4 | +12V (ECU power supply) | power_in | single_source | |
| OEM-E2-24 | O2 right rear (OXR2) | lambda_nb_in | — | — | — | single_source | |
| OEM-E2-25 | O2 heater right rear (HTR2) | low_side_out | — | — | — | single_source | |
| OEM-E2-26 | O2 heater left rear (HTL2) | low_side_out | — | — | — | single_source | |
| OEM-E3-1 | Battery constant (BATT) | power_in | — | — | — | single_source | |
| OEM-E3-10 | EFI main relay control (MREL) | low_side_out | — | — | — | single_source | |
| OEM-E3-11 | Serial diagnostic (SIL) | serial | — | — | — | single_source | |
| OEM-E3-16 | EFI main relay (+B) | power_in | MAXXECUMINI-C1-H4 | +12V (ECU power supply) | power_in | single_source | |
| OEM-E3-4 | Fuel pump relay (FPR) | low_side_out | — | — | — | single_source | |
| OEM-E3-5 | Fuel pump control (FC) | low_side_out | — | — | — | single_source | |
| OEM-E3-6 | Check-engine lamp (W) | low_side_out | — | — | — | single_source | |
| OEM-E3-7 | ETCS main relay (+BM) | power_in | MAXXECUMINI-C1-H4 | +12V (ECU power supply) | power_in | single_source | |
| OEM-E3-8 | EFI main relay (+B2) | power_in | MAXXECUMINI-C1-H4 | +12V (ECU power supply) | power_in | single_source | |
| OEM-E3-9 | Ignition switch (IGSW) | digital_in | — | — | — | single_source | |
| OEM-E4-13 | A/C clutch relay (ACMG) | low_side_out | — | — | — | single_source | |
| OEM-E4-18 | EVAP vapor pressure (PTNK) | analog_in | — | — | — | single_source | |
| OEM-E4-2 | Starter signal (STA) | digital_in | — | — | — | single_source | |
| OEM-E4-5 | Diagnostic/timing check (TC) | digital_in | — | — | — | single_source | |
| OEM-E4-6 | Stop light switch (STP) | digital_in | — | — | — | single_source | |
| OEM-E4-8 | O2 left rear (OXL2) | lambda_nb_in | — | — | — | single_source | |
| OEM-E5-11 | Vehicle speed sensor (SP2-) | digital_in | MAXXECUMINI-C1-B1 | DIN 1 (Hall only) | digital_in | single_source | |
| OEM-E5-12 | Canister close valve (CCV) | low_side_out | — | — | — | single_source | |
| OEM-E5-5 | Vehicle speed sensor (SP2+) | digital_in | MAXXECUMINI-C1-B2 | DIN 2 (Hall only) | digital_in | single_source | |
| OEM-E6-10 | Mass air flow (VG) | analog_in | — | — | — | single_source | |
| OEM-E6-11 | O2 right front (OXR1) | lambda_nb_in | — | — | — | single_source | |
| OEM-E6-12 | O2 left front (OXL1) | lambda_nb_in | — | — | — | single_source | |
| OEM-E6-14 | Coolant temperature (THW) | temp_in | MAXXECUMINI-C1-C1 | CLT | temp_in | single_source | |
| OEM-E6-15 | Accelerator pedal 1 (VPA) | analog_in | MAXXECUMINI-C1-D2 | TPS | analog_in | single_source | |
| OEM-E6-16 | Accelerator pedal 2 (VPA2) | analog_in | MAXXECUMINI-C1-C4 | AIN 4 (0-5V) | analog_in | single_source | |
| OEM-E6-17 | Power ground (E1) | ground | MAXXECUMINI-C1-G4 | ENGINE GND | ground | single_source | |
| OEM-E6-18 | Sensor ground (E2) | sensor_ground | MAXXECUMINI-C1-A2 + MAXXECUMINI-C1-B3 + MAXXECUMINI-C1-B4 + MAXXECUMINI-C1-D4 | TRIGGER GND + SENSOR GND + SENSOR GND + SENSOR GND | sensor_ground | single_source | |
| OEM-E6-19 | MAF ground (EVG) | sensor_ground | MAXXECUMINI-C1-A2 + MAXXECUMINI-C1-B3 + MAXXECUMINI-C1-B4 + MAXXECUMINI-C1-D4 | TRIGGER GND + SENSOR GND + SENSOR GND + SENSOR GND | sensor_ground | single_source | |
| OEM-E6-2 | Sensor supply +5V (VC) | vref | MAXXECUMINI-C1-E2 | +5V sensor supply | vref | single_source | |
| OEM-E6-22 | Intake air temperature (THA) | temp_in | MAXXECUMINI-C1-C2 | IAT | temp_in | single_source | |
| OEM-E6-23 | Throttle position 1 (VTA) | analog_in | MAXXECUMINI-C1-C3 | AIN 3 (0-5V) | analog_in | single_source | |
| OEM-E6-24 | Throttle position 2 (VTA2) | analog_in | — | — | — | single_source | |
| OEM-E6-3 | O2 heater right front (HTR) | low_side_out | — | — | — | single_source | |
| OEM-E6-4 | O2 heater left front (HTL) | low_side_out | — | — | — | single_source | |
| OEM-E6-5 | Injector 1 (#10) | injector_out | MAXXECUMINI-C1-G3 | INJ 1 | injector_out | single_source | |
| OEM-E6-6 | Injector 2 (#20) | injector_out | MAXXECUMINI-C1-H1 | INJ 2 | injector_out | single_source | |
| OEM-E6-7 | EVAP purge VSV (PRG) | low_side_out | — | — | — | single_source | |
| OEM-E7-1 | Injector 3 (#30) | injector_out | MAXXECUMINI-C1-H2 | INJ 3 | injector_out | single_source | |
| OEM-E7-10 | Cam position (G2) | trigger_in | — | — | — | single_source | |
| OEM-E7-11 | Ignition 1 (IGT) | ignition_out | MAXXECUMINI-C1-F1 | IGN 1 | ignition_out | single_source | |
| OEM-E7-12 | Ignition 2 (IGT2) | ignition_out | MAXXECUMINI-C1-F2 | IGN 2 | ignition_out | single_source | |
| OEM-E7-13 | Ignition 3 (IGT3) | ignition_out | MAXXECUMINI-C1-F3 | IGN 3 | ignition_out | single_source | |
| OEM-E7-17 | VVT-i OCV - (OCV-) | low_side_out | MAXXECUMINI-C1-G2 | GPO 1 | low_side_out | single_source | |
| OEM-E7-18 | VVT-i OCV + (OCV+) | low_side_out | MAXXECUMINI-C1-G1 | GPO 2 | low_side_out | single_source | |
| OEM-E7-19 | ETCS throttle clutch - (CL-) | low_side_out | MAXXECUMINI-C1-E1 | GPO 3 | low_side_out | single_source | |
| OEM-E7-2 | Injector 4 (#40) | injector_out | MAXXECUMINI-C1-H3 | INJ 4 | injector_out | single_source | |
| OEM-E7-20 | ETCS throttle clutch + (CL+) | low_side_out | MAXXECUMINI-C1-D1 | GPO 8/TACHO | low_side_out | single_source | |
| OEM-E7-21 | Power ground (E01) | ground | MAXXECUMINI-C1-G4 | ENGINE GND | ground | single_source | |
| OEM-E7-22 | Crank position return (NE-) | sensor_ground | MAXXECUMINI-C1-A2 + MAXXECUMINI-C1-B3 + MAXXECUMINI-C1-B4 + MAXXECUMINI-C1-D4 | TRIGGER GND + SENSOR GND + SENSOR GND + SENSOR GND | sensor_ground | single_source | |
| OEM-E7-23 | Crank position (NE) | trigger_in | MAXXECUMINI-C1-A1 | TRIGGER | trigger_in | single_source | |
| OEM-E7-25 | Igniter feedback (IGF) | digital_in | — | — | — | single_source | |
| OEM-E7-27 | Knock sensor 2 (KNK2) | knock_in | — | — | — | single_source | |
| OEM-E7-28 | Knock sensor 1 (KNK1) | knock_in | — | — | — | single_source | |
| OEM-E7-3 | Injector 5 (#50) | injector_out | MAXXECUMINI-C1-G3 | INJ 1 | injector_out | single_source | |
| OEM-E7-4 | Injector 6 (#60) | injector_out | MAXXECUMINI-C1-H1 | INJ 2 | injector_out | single_source | |
| OEM-E7-5 | ACIS intake VSV | low_side_out | — | — | — | single_source | |
| OEM-E7-7 | ETCS throttle motor - (M-) | hbridge_out | — | — | — | single_source | |
| OEM-E7-8 | ETCS throttle motor + (M+) | hbridge_out | — | — | — | single_source |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-E2-13 | SP-14V-1 | 0.85 | no route | ETCS power (TBP, throttle bypass) | — | |
| W2 | OEM-E3-16 | SP-14V-1 | 0.85 | no route | EFI main relay (+B) | — | |
| W3 | OEM-E3-7 | SP-14V-1 | 0.85 | no route | ETCS main relay (+BM) | — | |
| W4 | OEM-E3-8 | SP-14V-1 | 0.85 | no route | EFI main relay (+B2) | — | |
| W5 | SP-14V-1 | MAXXECUMINI-C1-H4 | 0.85 | no route | +12V (ECU power supply) | — | |
| W6 | OEM-E6-17 | SP-GND-1 | 0.85 | no route | Power ground (E1) | — | |
| W7 | OEM-E7-21 | SP-GND-1 | 0.85 | no route | Power ground (E01) | — | |
| W8 | SP-GND-1 | MAXXECUMINI-C1-G4 | 0.85 | no route | ENGINE GND | — | |
| W9 | OEM-E6-18 | SP-0V-1 | 0.5 | no route | Sensor ground (E2) | — | |
| W10 | OEM-E6-19 | SP-0V-1 | 0.5 | no route | MAF ground (EVG) | — | |
| W11 | OEM-E7-22 | SP-0V-1 | 0.5 | no route | Crank position return (NE-) | — | |
| W12 | SP-0V-1 | MAXXECUMINI-C1-A2 | 0.5 | no route | TRIGGER GND | — | |
| W13 | SP-0V-1 | MAXXECUMINI-C1-B3 | 0.5 | no route | SENSOR GND | — | |
| W14 | SP-0V-1 | MAXXECUMINI-C1-B4 | 0.5 | no route | SENSOR GND | — | |
| W15 | SP-0V-1 | MAXXECUMINI-C1-D4 | 0.5 | no route | SENSOR GND | — | |
| W16 | OEM-E6-2 | MAXXECUMINI-C1-E2 | 0.5 | no route | Sensor supply +5V (VC) | — | |
| W17 | OEM-E7-23 | MAXXECUMINI-C1-A1 | 0.5 | no route | Crank position (NE) | — | |
| W18 | OEM-E7-11 | MAXXECUMINI-C1-F1 | 0.5 | no route | Ignition 1 (IGT) | — | |
| W19 | OEM-E7-12 | MAXXECUMINI-C1-F2 | 0.5 | no route | Ignition 2 (IGT2) | — | |
| W20 | OEM-E7-13 | MAXXECUMINI-C1-F3 | 0.5 | no route | Ignition 3 (IGT3) | — | |
| W21 | OEM-E6-5 | MAXXECUMINI-C1-G3 | 0.5 | no route | Injector 1 (#10) | — | |
| W22 | OEM-E6-6 | MAXXECUMINI-C1-H1 | 0.5 | no route | Injector 2 (#20) | — | |
| W23 | OEM-E7-1 | MAXXECUMINI-C1-H2 | 0.5 | no route | Injector 3 (#30) | — | |
| W24 | OEM-E7-2 | MAXXECUMINI-C1-H3 | 0.5 | no route | Injector 4 (#40) | — | |
| W25 | OEM-E7-3 | MAXXECUMINI-C1-G3 | 0.5 | no route | Injector 5 (#50) | — | |
| W26 | OEM-E7-4 | MAXXECUMINI-C1-H1 | 0.5 | no route | Injector 6 (#60) | — | |
| W27 | OEM-E7-17 | MAXXECUMINI-C1-G2 | 0.5 | no route | VVT-i OCV - (OCV-) | — | |
| W28 | OEM-E7-18 | MAXXECUMINI-C1-G1 | 0.5 | no route | VVT-i OCV + (OCV+) | — | |
| W29 | OEM-E7-19 | MAXXECUMINI-C1-E1 | 0.5 | no route | ETCS throttle clutch - (CL-) | — | |
| W30 | OEM-E7-20 | MAXXECUMINI-C1-D1 | 0.5 | no route | ETCS throttle clutch + (CL+) | — | |
| W31 | OEM-E6-15 | MAXXECUMINI-C1-D2 | 0.5 | no route | Accelerator pedal 1 (VPA) | — | |
| W32 | OEM-E6-23 | MAXXECUMINI-C1-C3 | 0.5 | no route | Throttle position 1 (VTA) | — | |
| W33 | OEM-E6-16 | MAXXECUMINI-C1-C4 | 0.5 | no route | Accelerator pedal 2 (VPA2) | — | |
| W34 | OEM-E6-14 | MAXXECUMINI-C1-C1 | 0.5 | no route | Coolant temperature (THW) | — | |
| W35 | OEM-E6-22 | MAXXECUMINI-C1-C2 | 0.5 | no route | Intake air temperature (THA) | — | |
| W36 | OEM-E5-11 | MAXXECUMINI-C1-B1 | 0.5 | no route | Vehicle speed sensor (SP2-) | — | |
| W37 | OEM-E5-5 | MAXXECUMINI-C1-B2 | 0.5 | no route | Vehicle speed sensor (SP2+) | — |
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 (9)
| Severity | Code | Subject | Message |
|---|---|---|---|
| error | NET_MERGED | MAXXECUMINI-C1-G3 + OEM-E6-5 + OEM-E7-3 | 2 different OEM functions share one net: OEM-E6-5 Injector 1 (#10); OEM-E7-3 Injector 5 (#50) |
| error | NET_MERGED | MAXXECUMINI-C1-H1 + OEM-E6-6 + OEM-E7-4 | 2 different OEM functions share one net: OEM-E6-6 Injector 2 (#20); OEM-E7-4 Injector 6 (#60) |
| error | REQUIRED_UNMAPPED | OEM-E3-9 | Required OEM function "Ignition switch (IGSW)" (digital_in) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-E6-24 | Required OEM function "Throttle position 2 (VTA2)" (analog_in) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-E7-10 | Required OEM function "Cam position (G2)" (trigger_in) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-E7-7 | Required OEM function "ETCS throttle motor - (M-)" (hbridge_out) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-E7-8 | Required OEM function "ETCS throttle motor + (M+)" (hbridge_out) is not connected to the new ECU. |
| 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 | 25 optional OEM pins are not mapped: OEM-E2-24 O2 right rear (OXR2); OEM-E2-25 O2 heater right rear (HTR2); OEM-E2-26 O2 heater left rear (HTL2); OEM-E3-10 EFI main relay control (MREL); OEM-E3-11 Serial diagnostic (SIL); OEM-E3-4 Fuel pump relay (FPR); OEM-E3-5 Fuel pump control (FC); OEM-E3-6 Check-engine lamp (W); OEM-E4-13 A/C clutch relay (ACMG); OEM-E4-18 EVAP vapor pressure (PTNK); OEM-E4-2 Starter signal (STA); OEM-E4-5 Diagnostic/timing check (TC); OEM-E4-6 Stop light switch (STP); OEM-E4-8 O2 left rear (OXL2); OEM-E5-12 Canister close valve (CCV); OEM-E6-10 Mass air flow (VG); OEM-E6-11 O2 right front (OXR1); OEM-E6-12 O2 left front (OXL1); OEM-E6-3 O2 heater right front (HTR); OEM-E6-4 O2 heater left front (HTL); OEM-E6-7 EVAP purge VSV (PRG); OEM-E7-25 Igniter feedback (IGF); OEM-E7-27 Knock sensor 2 (KNK2); OEM-E7-28 Knock sensor 1 (KNK1); OEM-E7-5 ACIS intake VSV |
Accepted (1)
| Code | Subject | Reason | By |
|---|---|---|---|
| REQUIRED_UNMAPPED | OEM-E3-1 | Battery-constant (memory) feed of the stock ECU: the new ECU has no such input, so it is not needed. | mapping-proposal |
Notes
Fit check: needs add-on. Resolve these before building: - No drive-by-wire; needs a cable-throttle conversion or an external DBW controller - No knock input; the stock knock sensor would be unused - 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 2026-10-11. Review every wire against both manuals before building. Open items: - OEM-E7 10: Cam position (G2): no free cam_vr/cam_hall/frequency_in input on MaxxECU MaxxECU MINI - OEM-E3 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); MaxxECU MaxxECU MINI has no dedicated key-on input - OEM-E6 24: Throttle position 2 (VTA2): no free tps/analog_0_5 on MaxxECU MaxxECU MINI - OEM-E7 7: ETCS throttle motor - (M-): no +/− pair in the pinout (multi-phase or half-documented motor); wire by hand - OEM-E7 8: ETCS throttle motor + (M+): no +/− pair in the pinout (multi-phase or half-documented motor); wire by hand Not wired: - OEM-E3 1: Battery constant (BATT): MaxxECU MaxxECU MINI has no battery-constant input; not needed - OEM-E7 28: Knock sensor 1 (KNK1): no free knock input on MaxxECU MaxxECU MINI - OEM-E7 27: Knock sensor 2 (KNK2): no free knock input on MaxxECU MaxxECU MINI - OEM-E3 10: EFI main relay control (MREL): no free relay_control/low_side/heater_low_side/ls_hs/injector rated ≥ 0.2 A on MaxxECU MaxxECU MINI - OEM-E3 4: Fuel pump relay (FPR): no free relay_control/low_side/heater_low_side/ls_hs/injector rated ≥ 0.2 A on MaxxECU MaxxECU MINI - OEM-E4 13: A/C clutch relay (ACMG): no free relay_control/low_side/heater_low_side/ls_hs/injector rated ≥ 0.2 A on MaxxECU MaxxECU MINI - OEM-E2 25: O2 heater right rear (HTR2): no free heater_low_side/low_side/relay_control/ls_hs/injector on MaxxECU MaxxECU MINI - OEM-E2 26: O2 heater left rear (HTL2): no free heater_low_side/low_side/relay_control/ls_hs/injector on MaxxECU MaxxECU MINI - OEM-E6 3: O2 heater right front (HTR): no free heater_low_side/low_side/relay_control/ls_hs/injector on MaxxECU MaxxECU MINI - OEM-E6 4: O2 heater left front (HTL): no free heater_low_side/low_side/relay_control/ls_hs/injector on MaxxECU MaxxECU MINI - OEM-E3 5: Fuel pump control (FC): no free low_side/relay_control/heater_low_side/ls_hs/injector on MaxxECU MaxxECU MINI - OEM-E3 6: Check-engine lamp (W): no free low_side/relay_control/heater_low_side/ls_hs/injector on MaxxECU MaxxECU MINI - OEM-E5 12: Canister close valve (CCV): no free low_side/relay_control/heater_low_side/ls_hs/injector on MaxxECU MaxxECU MINI - OEM-E6 7: EVAP purge VSV (PRG): no free low_side/relay_control/heater_low_side/ls_hs/injector on MaxxECU MaxxECU MINI - OEM-E7 5: ACIS intake VSV: no free low_side/relay_control/heater_low_side/ls_hs/injector on MaxxECU MaxxECU MINI - OEM-E6 10: Mass air flow (VG): no free maf/analog_0_5 on MaxxECU MaxxECU MINI - OEM-E2 24: O2 right rear (OXR2): no free o2_narrowband/analog_0_5 on MaxxECU MaxxECU MINI - OEM-E4 8: O2 left rear (OXL2): no free o2_narrowband/analog_0_5 on MaxxECU MaxxECU MINI - OEM-E6 11: O2 right front (OXR1): no free o2_narrowband/analog_0_5 on MaxxECU MaxxECU MINI - OEM-E6 12: O2 left front (OXL1): no free o2_narrowband/analog_0_5 on MaxxECU MaxxECU MINI - OEM-E4 18: EVAP vapor pressure (PTNK): no free analog_0_5 on MaxxECU MaxxECU MINI - OEM-E7 25: Igniter feedback (IGF): no free frequency_in/switch_in on MaxxECU MaxxECU MINI - OEM-E4 2: Starter signal (STA): no free switch_in/frequency_in/analog_0_5 on MaxxECU MaxxECU MINI - OEM-E4 5: Diagnostic/timing check (TC): no free switch_in/frequency_in/analog_0_5 on MaxxECU MaxxECU MINI - OEM-E4 6: Stop light switch (STP): no free switch_in/frequency_in/analog_0_5 on MaxxECU MaxxECU MINI - OEM-E3 11: Serial diagnostic (SIL): no free k_line on MaxxECU MaxxECU MINI
Sources
| Reliability | Kind | Title | URL | Archive | Captured | SHA-256 |
|---|---|---|---|---|---|---|
| 4 | vendor_doc | MaxxECU GEN1 pinout (MINI / STREET / SPORT / V1 / RACE / PRO) | http://www.maxxecu.com/webhelp/wirings-maxxecu_pinout.html | archive | 2026-10-05 | 2e37b6814690 |
| 4 | service_manual | Toyota FSM RM779U (2001 Lexus IS300) — DIAGNOSTICS 'TERMINALS OF ECM' (DI-20/21) | http://www.2jzgarage.com/wp-content/uploads/2013/04/2001_IS300_ECU_Pinouts.pdf | — | — | — |