Lexus IS300 (XE10 / JCE10) 2001-05 2JZ-GE VVT-i → MaxxECU MaxxECU STREET REV9+ (auto)
Lexus IS300 (XE10 / JCE10) 2001-05 2JZ-GE VVT-i — MaxxECU — MaxxECU STREET
⚠ NOT CHECKED. Don't build from this.
Drawn by Michael Gnankou · Rev 0 · draft · 2026-10-20
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 | 3: 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 | OEM-E6-17 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-E7-21 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | SP-GND-1 | MAXXECUSTREE-C1-L4 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | OEM-E6-18 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | OEM-E6-19 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | OEM-E7-22 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | SP-0V-1 | MAXXECUSTREE-C1-H1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | SP-0V-1 | MAXXECUSTREE-C1-H2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | OEM-E6-2 | MAXXECUSTREE-C1-G1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-E7-23 | MAXXECUSTREE-C1-H3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-E7-10 | MAXXECUSTREE-C1-H4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-E7-11 | MAXXECUSTREE-C1-A2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-E7-12 | MAXXECUSTREE-C1-A3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-E7-13 | MAXXECUSTREE-C1-B2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-E6-5 | MAXXECUSTREE-C1-K1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-E6-6 | MAXXECUSTREE-C1-K2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-E7-1 | MAXXECUSTREE-C1-M1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-E7-2 | MAXXECUSTREE-C1-M2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-E7-3 | MAXXECUSTREE-C1-M3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-E7-4 | MAXXECUSTREE-C1-L3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-E3-9 | MAXXECUSTREE-C1-M4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-E7-17 | MAXXECUSTREE-C1-B4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-E7-18 | MAXXECUSTREE-C1-C4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-E7-19 | MAXXECUSTREE-C1-D4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-E7-20 | MAXXECUSTREE-C1-A4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-E6-15 | MAXXECUSTREE-C1-G2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-E6-23 | MAXXECUSTREE-C1-J3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-E6-16 | MAXXECUSTREE-C1-J4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-E6-14 | MAXXECUSTREE-C1-F1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-E3-10 | MAXXECUSTREE-C1-D1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-E6-22 | MAXXECUSTREE-C1-F2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-E5-11 | MAXXECUSTREE-C1-K3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-E5-5 | MAXXECUSTREE-C1-K4 | 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 | MAXXECUSTREE-C1-M4 | MAXXECUSTREE-C1-H1 | open (OL) | +12 V supply must not touch sensor ground | |
| 2 | MAXXECUSTREE-C1-M4 | MAXXECUSTREE-C1-L4 | open (OL) | +12 V supply must not touch power ground | |
| 3 | OEM-E2-13 | MAXXECUSTREE-C1-H1 | open (OL) | +12 V supply must not touch sensor ground | |
| 4 | OEM-E2-13 | MAXXECUSTREE-C1-L4 | open (OL) | +12 V supply must not touch power ground | |
| 5 | MAXXECUSTREE-C1-H1 | MAXXECUSTREE-C1-G1 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 6 | MAXXECUSTREE-C1-L4 | MAXXECUSTREE-C1-G1 | open (OL) | power ground must not touch 5 V sensor reference | |
| 7 | MAXXECUSTREE-C1-M4 | MAXXECUSTREE-C1-G1 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 8 | OEM-E2-13 | MAXXECUSTREE-C1-G1 | 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
MAXXECUSTREE-C1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A2 | IGN 1 | — | W16 | — | 0.5 | OEM-E7-11 | — | — | — |
| A3 | IGN 2 | — | W17 | — | 0.5 | OEM-E7-12 | — | — | — |
| A4 | GPO 8/TACHO | — | W29 | — | 0.5 | OEM-E7-20 | — | — | — |
| B2 | IGN 3 | — | W18 | — | 0.5 | OEM-E7-13 | — | — | — |
| B3 | IGN 4 | — | — | — | — | — | — | — | — |
| B4 | GPO 1 | — | W26 | — | 0.5 | OEM-E7-17 | — | — | — |
| C2 | IGN 5 | — | — | — | — | — | — | — | — |
| C3 | IGN 6 | — | — | — | — | — | — | — | — |
| C4 | GPO 2 | — | W27 | — | 0.5 | OEM-E7-18 | — | — | — |
| D1 | WBO2 Heater- | — | W34 | — | 0.5 | OEM-E3-10 | — | — | — |
| D4 | GPO 3 | — | W28 | — | 0.5 | OEM-E7-19 | — | — | — |
| E1 | CAN H | — | — | — | — | — | — | — | — |
| E2 | CAN L | — | — | — | — | — | — | — | — |
| E3 | GND Shield | — | — | — | — | — | — | — | — |
| F1 | CLT | — | W33 | — | 0.5 | OEM-E6-14 | — | — | — |
| F2 | IAT | — | W35 | — | 0.5 | OEM-E6-22 | — | — | — |
| F3 | WBO2 VREF | — | — | — | — | — | — | — | — |
| F4 | WBO2 VS | — | — | — | — | — | — | — | — |
| G1 | +5V sensor supply | — | W13 | — | 0.5 | OEM-E6-2 | — | — | — |
| G2 | TPS/AIN | — | W30 | — | 0.5 | OEM-E6-15 | — | — | — |
| G3 | WBO2 IP | — | — | — | — | — | — | — | — |
| G4 | WBO2 RCAL | — | — | — | — | — | — | — | — |
| H1 | Sensor GND | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| H2 | Trigger GND | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| H3 | TRIGGER | — | W14 | — | 0.5 | OEM-E7-23 | — | — | — |
| H4 | HOME | — | W15 | — | 0.5 | OEM-E7-10 | — | — | — |
| J1 | AIN 1 (temperature) | — | — | — | — | — | — | — | — |
| J2 | AIN 2 (Temperature) | — | — | — | — | — | — | — | — |
| J3 | AIN 3 (0-5V) | — | W31 | — | 0.5 | OEM-E6-23 | — | — | — |
| J4 | AIN 4 (0-5V) | — | W32 | — | 0.5 | OEM-E6-16 | — | — | — |
| K1 | INJ 1 | — | W19 | — | 0.5 | OEM-E6-5 | — | — | — |
| K2 | INJ 2 | — | W20 | — | 0.5 | OEM-E6-6 | — | — | — |
| K3 | DIN 1 | — | W36 | — | 0.5 | OEM-E5-11 | — | — | — |
| K4 | DIN 2 | — | W37 | — | 0.5 | OEM-E5-5 | — | — | — |
| L3 | INJ 6 | — | W24 | — | 0.5 | OEM-E7-4 | — | — | — |
| L4 | Engine GND | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| M1 | INJ 3 | — | W21 | — | 0.5 | OEM-E7-1 | — | — | — |
| M2 | INJ 4 | — | W22 | — | 0.5 | OEM-E7-2 | — | — | — |
| M3 | INJ 5 | — | W23 | — | 0.5 | OEM-E7-3 | — | — | — |
| M4 | +12V ECU power supply | — | W25 | — | 0.5 | OEM-E3-9 | — | — | — |
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) | — | W34 | — | 0.5 | MAXXECUSTREE-C1-D1 | — | — | — |
| 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) | — | W25 | — | 0.5 | MAXXECUSTREE-C1-M4 | — | — | — |
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 | MAXXECUSTREE-C1-K3 | — | — | — |
| 12 | Canister close valve (CCV) | — | — | — | — | — | — | — | — |
| 5 | Vehicle speed sensor (SP2+) | — | W37 | — | 0.5 | MAXXECUSTREE-C1-K4 | — | — | — |
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) | — | W33 | — | 0.5 | MAXXECUSTREE-C1-F1 | — | — | — |
| 15 | Accelerator pedal 1 (VPA) | — | W30 | — | 0.5 | MAXXECUSTREE-C1-G2 | — | — | — |
| 16 | Accelerator pedal 2 (VPA2) | — | W32 | — | 0.5 | MAXXECUSTREE-C1-J4 | — | — | — |
| 17 | Power ground (E1) | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| 18 | Sensor ground (E2) | — | W8 | — | 0.5 | SP-0V-1 | — | — | — |
| 19 | MAF ground (EVG) | — | W9 | — | 0.5 | SP-0V-1 | — | — | — |
| 2 | Sensor supply +5V (VC) | — | W13 | — | 0.5 | MAXXECUSTREE-C1-G1 | — | — | — |
| 22 | Intake air temperature (THA) | — | W35 | — | 0.5 | MAXXECUSTREE-C1-F2 | — | — | — |
| 23 | Throttle position 1 (VTA) | — | W31 | — | 0.5 | MAXXECUSTREE-C1-J3 | — | — | — |
| 24 | Throttle position 2 (VTA2) | — | — | — | — | — | — | — | — |
| 3 | O2 heater right front (HTR) | — | — | — | — | — | — | — | — |
| 4 | O2 heater left front (HTL) | — | — | — | — | — | — | — | — |
| 5 | Injector 1 (#10) | — | W19 | — | 0.5 | MAXXECUSTREE-C1-K1 | — | — | — |
| 6 | Injector 2 (#20) | — | W20 | — | 0.5 | MAXXECUSTREE-C1-K2 | — | — | — |
| 7 | EVAP purge VSV (PRG) | — | — | — | — | — | — | — | — |
OEM-E7
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Injector 3 (#30) | — | W21 | — | 0.5 | MAXXECUSTREE-C1-M1 | — | — | — |
| 10 | Cam position (G2) | — | W15 | — | 0.5 | MAXXECUSTREE-C1-H4 | — | — | — |
| 11 | Ignition 1 (IGT) | — | W16 | — | 0.5 | MAXXECUSTREE-C1-A2 | — | — | — |
| 12 | Ignition 2 (IGT2) | — | W17 | — | 0.5 | MAXXECUSTREE-C1-A3 | — | — | — |
| 13 | Ignition 3 (IGT3) | — | W18 | — | 0.5 | MAXXECUSTREE-C1-B2 | — | — | — |
| 17 | VVT-i OCV - (OCV-) | — | W26 | — | 0.5 | MAXXECUSTREE-C1-B4 | — | — | — |
| 18 | VVT-i OCV + (OCV+) | — | W27 | — | 0.5 | MAXXECUSTREE-C1-C4 | — | — | — |
| 19 | ETCS throttle clutch - (CL-) | — | W28 | — | 0.5 | MAXXECUSTREE-C1-D4 | — | — | — |
| 2 | Injector 4 (#40) | — | W22 | — | 0.5 | MAXXECUSTREE-C1-M2 | — | — | — |
| 20 | ETCS throttle clutch + (CL+) | — | W29 | — | 0.5 | MAXXECUSTREE-C1-A4 | — | — | — |
| 21 | Power ground (E01) | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| 22 | Crank position return (NE-) | — | W10 | — | 0.5 | SP-0V-1 | — | — | — |
| 23 | Crank position (NE) | — | W14 | — | 0.5 | MAXXECUSTREE-C1-H3 | — | — | — |
| 25 | Igniter feedback (IGF) | — | — | — | — | — | — | — | — |
| 27 | Knock sensor 2 (KNK2) | — | — | — | — | — | — | — | — |
| 28 | Knock sensor 1 (KNK1) | — | — | — | — | — | — | — | — |
| 3 | Injector 5 (#50) | — | W23 | — | 0.5 | MAXXECUSTREE-C1-M3 | — | — | — |
| 4 | Injector 6 (#60) | — | W24 | — | 0.5 | MAXXECUSTREE-C1-L3 | — | — | — |
| 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 | — | — | W8 | — | 0.5 | OEM-E6-18 | — | — | — |
| 1 | — | — | W9 | — | 0.5 | OEM-E6-19 | — | — | — |
| 1 | — | — | W10 | — | 0.5 | OEM-E7-22 | — | — | — |
| 1 | — | — | W11 | — | 0.5 | MAXXECUSTREE-C1-H1 | — | — | — |
| 1 | — | — | W12 | — | 0.5 | MAXXECUSTREE-C1-H2 | — | — | — |
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 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W5 | — | 0.85 | OEM-E6-17 | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-E7-21 | — | — | — |
| 1 | — | — | W7 | — | 0.85 | MAXXECUSTREE-C1-L4 | — | — | — |
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 | — | — | — | 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 | MAXXECUSTREE-C1-D1 | WBO2 Heater- | low_side_out | single_source | |
| OEM-E3-11 | Serial diagnostic (SIL) | serial | — | — | — | single_source | |
| OEM-E3-16 | EFI main relay (+B) | 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 | — | — | — | single_source | |
| OEM-E3-8 | EFI main relay (+B2) | power_in | — | — | — | single_source | |
| OEM-E3-9 | Ignition switch (IGSW) | digital_in | MAXXECUSTREE-C1-M4 | +12V ECU power supply | power_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 | MAXXECUSTREE-C1-K3 | DIN 1 | 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 | MAXXECUSTREE-C1-K4 | DIN 2 | 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 | MAXXECUSTREE-C1-F1 | CLT | temp_in | single_source | |
| OEM-E6-15 | Accelerator pedal 1 (VPA) | analog_in | MAXXECUSTREE-C1-G2 | TPS/AIN | analog_in | single_source | |
| OEM-E6-16 | Accelerator pedal 2 (VPA2) | analog_in | MAXXECUSTREE-C1-J4 | AIN 4 (0-5V) | analog_in | single_source | |
| OEM-E6-17 | Power ground (E1) | ground | MAXXECUSTREE-C1-L4 | Engine GND | ground | single_source | |
| OEM-E6-18 | Sensor ground (E2) | sensor_ground | MAXXECUSTREE-C1-H1 + MAXXECUSTREE-C1-H2 | Sensor GND + Trigger GND | sensor_ground | single_source | |
| OEM-E6-19 | MAF ground (EVG) | sensor_ground | MAXXECUSTREE-C1-H1 + MAXXECUSTREE-C1-H2 | Sensor GND + Trigger GND | sensor_ground | single_source | |
| OEM-E6-2 | Sensor supply +5V (VC) | vref | MAXXECUSTREE-C1-G1 | +5V sensor supply | vref | single_source | |
| OEM-E6-22 | Intake air temperature (THA) | temp_in | MAXXECUSTREE-C1-F2 | IAT | temp_in | single_source | |
| OEM-E6-23 | Throttle position 1 (VTA) | analog_in | MAXXECUSTREE-C1-J3 | 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 | MAXXECUSTREE-C1-K1 | INJ 1 | injector_out | single_source | |
| OEM-E6-6 | Injector 2 (#20) | injector_out | MAXXECUSTREE-C1-K2 | 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 | MAXXECUSTREE-C1-M1 | INJ 3 | injector_out | single_source | |
| OEM-E7-10 | Cam position (G2) | trigger_in | MAXXECUSTREE-C1-H4 | HOME | trigger_in | single_source | |
| OEM-E7-11 | Ignition 1 (IGT) | ignition_out | MAXXECUSTREE-C1-A2 | IGN 1 | ignition_out | single_source | |
| OEM-E7-12 | Ignition 2 (IGT2) | ignition_out | MAXXECUSTREE-C1-A3 | IGN 2 | ignition_out | single_source | |
| OEM-E7-13 | Ignition 3 (IGT3) | ignition_out | MAXXECUSTREE-C1-B2 | IGN 3 | ignition_out | single_source | |
| OEM-E7-17 | VVT-i OCV - (OCV-) | low_side_out | MAXXECUSTREE-C1-B4 | GPO 1 | low_side_out | single_source | |
| OEM-E7-18 | VVT-i OCV + (OCV+) | low_side_out | MAXXECUSTREE-C1-C4 | GPO 2 | low_side_out | single_source | |
| OEM-E7-19 | ETCS throttle clutch - (CL-) | low_side_out | MAXXECUSTREE-C1-D4 | GPO 3 | low_side_out | single_source | |
| OEM-E7-2 | Injector 4 (#40) | injector_out | MAXXECUSTREE-C1-M2 | INJ 4 | injector_out | single_source | |
| OEM-E7-20 | ETCS throttle clutch + (CL+) | low_side_out | MAXXECUSTREE-C1-A4 | GPO 8/TACHO | low_side_out | single_source | |
| OEM-E7-21 | Power ground (E01) | ground | MAXXECUSTREE-C1-L4 | Engine GND | ground | single_source | |
| OEM-E7-22 | Crank position return (NE-) | sensor_ground | MAXXECUSTREE-C1-H1 + MAXXECUSTREE-C1-H2 | Sensor GND + Trigger GND | sensor_ground | single_source | |
| OEM-E7-23 | Crank position (NE) | trigger_in | MAXXECUSTREE-C1-H3 | 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 | MAXXECUSTREE-C1-M3 | INJ 5 | injector_out | single_source | |
| OEM-E7-4 | Injector 6 (#60) | injector_out | MAXXECUSTREE-C1-L3 | INJ 6 | 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 | OEM-E6-17 | SP-GND-1 | 0.85 | no route | Power ground (E1) | — | |
| W6 | OEM-E7-21 | SP-GND-1 | 0.85 | no route | Power ground (E01) | — | |
| W7 | SP-GND-1 | MAXXECUSTREE-C1-L4 | 0.85 | no route | Engine GND | — | |
| W8 | OEM-E6-18 | SP-0V-1 | 0.5 | no route | Sensor ground (E2) | — | |
| W9 | OEM-E6-19 | SP-0V-1 | 0.5 | no route | MAF ground (EVG) | — | |
| W10 | OEM-E7-22 | SP-0V-1 | 0.5 | no route | Crank position return (NE-) | — | |
| W11 | SP-0V-1 | MAXXECUSTREE-C1-H1 | 0.5 | no route | Sensor GND | — | |
| W12 | SP-0V-1 | MAXXECUSTREE-C1-H2 | 0.5 | no route | Trigger GND | — | |
| W13 | OEM-E6-2 | MAXXECUSTREE-C1-G1 | 0.5 | no route | Sensor supply +5V (VC) | — | |
| W14 | OEM-E7-23 | MAXXECUSTREE-C1-H3 | 0.5 | no route | Crank position (NE) | — | |
| W15 | OEM-E7-10 | MAXXECUSTREE-C1-H4 | 0.5 | no route | Cam position (G2) | — | |
| W16 | OEM-E7-11 | MAXXECUSTREE-C1-A2 | 0.5 | no route | Ignition 1 (IGT) | — | |
| W17 | OEM-E7-12 | MAXXECUSTREE-C1-A3 | 0.5 | no route | Ignition 2 (IGT2) | — | |
| W18 | OEM-E7-13 | MAXXECUSTREE-C1-B2 | 0.5 | no route | Ignition 3 (IGT3) | — | |
| W19 | OEM-E6-5 | MAXXECUSTREE-C1-K1 | 0.5 | no route | Injector 1 (#10) | — | |
| W20 | OEM-E6-6 | MAXXECUSTREE-C1-K2 | 0.5 | no route | Injector 2 (#20) | — | |
| W21 | OEM-E7-1 | MAXXECUSTREE-C1-M1 | 0.5 | no route | Injector 3 (#30) | — | |
| W22 | OEM-E7-2 | MAXXECUSTREE-C1-M2 | 0.5 | no route | Injector 4 (#40) | — | |
| W23 | OEM-E7-3 | MAXXECUSTREE-C1-M3 | 0.5 | no route | Injector 5 (#50) | — | |
| W24 | OEM-E7-4 | MAXXECUSTREE-C1-L3 | 0.5 | no route | Injector 6 (#60) | — | |
| W25 | OEM-E3-9 | MAXXECUSTREE-C1-M4 | 0.5 | no route | Ignition switch (IGSW) | — | |
| W26 | OEM-E7-17 | MAXXECUSTREE-C1-B4 | 0.5 | no route | VVT-i OCV - (OCV-) | — | |
| W27 | OEM-E7-18 | MAXXECUSTREE-C1-C4 | 0.5 | no route | VVT-i OCV + (OCV+) | — | |
| W28 | OEM-E7-19 | MAXXECUSTREE-C1-D4 | 0.5 | no route | ETCS throttle clutch - (CL-) | — | |
| W29 | OEM-E7-20 | MAXXECUSTREE-C1-A4 | 0.5 | no route | ETCS throttle clutch + (CL+) | — | |
| W30 | OEM-E6-15 | MAXXECUSTREE-C1-G2 | 0.5 | no route | Accelerator pedal 1 (VPA) | — | |
| W31 | OEM-E6-23 | MAXXECUSTREE-C1-J3 | 0.5 | no route | Throttle position 1 (VTA) | — | |
| W32 | OEM-E6-16 | MAXXECUSTREE-C1-J4 | 0.5 | no route | Accelerator pedal 2 (VPA2) | — | |
| W33 | OEM-E6-14 | MAXXECUSTREE-C1-F1 | 0.5 | no route | Coolant temperature (THW) | — | |
| W34 | OEM-E3-10 | MAXXECUSTREE-C1-D1 | 0.5 | no route | EFI main relay control (MREL) | — | |
| W35 | OEM-E6-22 | MAXXECUSTREE-C1-F2 | 0.5 | no route | Intake air temperature (THA) | — | |
| W36 | OEM-E5-11 | MAXXECUSTREE-C1-K3 | 0.5 | no route | Vehicle speed sensor (SP2-) | — | |
| W37 | OEM-E5-5 | MAXXECUSTREE-C1-K4 | 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 (7)
| Severity | Code | Subject | Message |
|---|---|---|---|
| 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-E7-7 | 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 | LOAD_UNKNOWN | MAXXECUSTREE-C1-D1 | MAXXECUSTREE-C1-D1 "WBO2 Heater-" drives OEM-E3-10 EFI main relay control (MREL) (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| 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 | NET_FAMILY | OEM-E3-9 ↔ MAXXECUSTREE-C1-M4 | OEM-E3-9 "Ignition switch (IGSW)" [digital_in] is wired to MAXXECUSTREE-C1-M4 "+12V ECU power supply" [power_in]. Switched supply used as the ignition-on sense. |
| info | UNMAPPED | OEM | 25 optional OEM pins are not mapped: OEM-E2-13 ETCS power (TBP, throttle bypass); OEM-E2-24 O2 right rear (OXR2); OEM-E2-25 O2 heater right rear (HTR2); OEM-E2-26 O2 heater left rear (HTL2); OEM-E3-11 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 Auto-mapped by auto_map() from the library pin data on 2026-10-20. Review every wire against both manuals before building. Open items: - OEM-E7 7: ETCS throttle motor − (M−): needs a paired H-bridge on MaxxECU MaxxECU STREET (H-bridge pairing not in the library: set device_pin.bridge_pair from the ECU manual) - OEM-E7 8: ETCS throttle motor + (M+): needs a paired H-bridge on MaxxECU MaxxECU STREET (H-bridge pairing not in the library: set device_pin.bridge_pair from the ECU manual) - OEM-E6 24: Throttle position 2 (VTA2): no free tps/analog_0_5 on MaxxECU MaxxECU STREET Not wired: - OEM-E3 1: Battery constant (BATT): MaxxECU MaxxECU STREET has no battery-constant memory input; not needed - OEM-E7 28: Knock sensor 1 (KNK1): no free knock input on MaxxECU MaxxECU STREET - OEM-E7 27: Knock sensor 2 (KNK2): no free knock input on MaxxECU MaxxECU STREET - 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 STREET - 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 STREET - OEM-E2 25: O2 heater right rear (HTR2): no free heater_low_side/low_side/relay_control/ls_hs/injector on MaxxECU MaxxECU STREET - OEM-E2 26: O2 heater left rear (HTL2): no free heater_low_side/low_side/relay_control/ls_hs/injector on MaxxECU MaxxECU STREET - OEM-E6 3: O2 heater right front (HTR): no free heater_low_side/low_side/relay_control/ls_hs/injector on MaxxECU MaxxECU STREET - OEM-E6 4: O2 heater left front (HTL): no free heater_low_side/low_side/relay_control/ls_hs/injector on MaxxECU MaxxECU STREET - OEM-E3 5: Fuel pump control (FC): no free low_side/relay_control/heater_low_side/ls_hs/injector on MaxxECU MaxxECU STREET - OEM-E3 6: Check-engine lamp (W): no free low_side/relay_control/heater_low_side/ls_hs/injector on MaxxECU MaxxECU STREET - OEM-E5 12: Canister close valve (CCV): no free low_side/relay_control/heater_low_side/ls_hs/injector on MaxxECU MaxxECU STREET - OEM-E6 7: EVAP purge VSV (PRG): no free low_side/relay_control/heater_low_side/ls_hs/injector on MaxxECU MaxxECU STREET - OEM-E7 5: ACIS intake VSV: no free low_side/relay_control/heater_low_side/ls_hs/injector on MaxxECU MaxxECU STREET - OEM-E6 10: Mass air flow (VG): no free maf/analog_0_5 on MaxxECU MaxxECU STREET - OEM-E2 24: O2 right rear (OXR2): no free o2_narrowband/analog_0_5 on MaxxECU MaxxECU STREET - OEM-E4 8: O2 left rear (OXL2): no free o2_narrowband/analog_0_5 on MaxxECU MaxxECU STREET - OEM-E6 11: O2 right front (OXR1): no free o2_narrowband/analog_0_5 on MaxxECU MaxxECU STREET - OEM-E6 12: O2 left front (OXL1): no free o2_narrowband/analog_0_5 on MaxxECU MaxxECU STREET - OEM-E4 18: EVAP vapor pressure (PTNK): no free analog_0_5 on MaxxECU MaxxECU STREET - OEM-E7 25: Igniter feedback (IGF): no free frequency_in/switch_in on MaxxECU MaxxECU STREET - OEM-E4 2: Starter signal (STA): no free switch_in/frequency_in/analog_0_5 on MaxxECU MaxxECU STREET - OEM-E4 5: Diagnostic/timing check (TC): no free switch_in/frequency_in/analog_0_5 on MaxxECU MaxxECU STREET - OEM-E4 6: Stop light switch (STP): no free switch_in/frequency_in/analog_0_5 on MaxxECU MaxxECU STREET - OEM-E3 11: Serial diagnostic (SIL): no free k_line on MaxxECU MaxxECU STREET
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 | — | — | — |