Lexus IS300 (XE10 / JCE10) 2001-05 2JZ-GE VVT-i → MaxxECU MaxxECU SPORT REV9+ (auto)
Lexus IS300 (XE10 / JCE10) 2001-05 2JZ-GE VVT-i — MaxxECU — MaxxECU SPORT
⚠ NOT CHECKED. Don't build from this.
Drawn by Michael Gnankou · Rev 0 · draft · 2026-10-12
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 | 43 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 | MAXXECUSPORT-C1-M4 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-E6-17 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | OEM-E7-21 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | SP-GND-1 | MAXXECUSPORT-C1-L4 | 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 | MAXXECUSPORT-C1-H1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | SP-0V-1 | MAXXECUSPORT-C1-H2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-E6-2 | MAXXECUSPORT-C1-G1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-E7-23 | MAXXECUSPORT-C1-H3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-E7-10 | MAXXECUSPORT-C1-H4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-E7-11 | MAXXECUSPORT-C1-A2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-E7-12 | MAXXECUSPORT-C1-A3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-E7-13 | MAXXECUSPORT-C1-B2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-E6-5 | MAXXECUSPORT-C1-K1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-E6-6 | MAXXECUSPORT-C1-K2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-E7-1 | MAXXECUSPORT-C1-M1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-E7-2 | MAXXECUSPORT-C1-M2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-E7-3 | MAXXECUSPORT-C1-M3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-E7-4 | MAXXECUSPORT-C1-L3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-E7-17 | MAXXECUSPORT-C1-B4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-E7-18 | MAXXECUSPORT-C1-C4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-E7-19 | MAXXECUSPORT-C1-D4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-E7-20 | MAXXECUSPORT-C1-A1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-E6-15 | MAXXECUSPORT-C1-G2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-E6-23 | MAXXECUSPORT-C1-J3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-E6-16 | MAXXECUSPORT-C1-J4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-E6-24 | MAXXECUSPORT-C1-C1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-E6-14 | MAXXECUSPORT-C1-F1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-E3-10 | MAXXECUSPORT-C1-B1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-E3-4 | MAXXECUSPORT-C1-A4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-E4-13 | MAXXECUSPORT-C1-D1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-E6-10 | MAXXECUSPORT-C1-D2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-E2-24 | MAXXECUSPORT-C1-D3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-E4-8 | MAXXECUSPORT-C1-E4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-E6-22 | MAXXECUSPORT-C1-F2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-E5-11 | MAXXECUSPORT-C1-K3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-E5-5 | MAXXECUSPORT-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 | MAXXECUSPORT-C1-M4 | MAXXECUSPORT-C1-H1 | open (OL) | +12 V supply must not touch sensor ground | |
| 2 | MAXXECUSPORT-C1-M4 | MAXXECUSPORT-C1-L4 | open (OL) | +12 V supply must not touch power ground | |
| 3 | MAXXECUSPORT-C1-H1 | MAXXECUSPORT-C1-G1 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 4 | MAXXECUSPORT-C1-L4 | MAXXECUSPORT-C1-G1 | open (OL) | power ground must not touch 5 V sensor reference | |
| 5 | MAXXECUSPORT-C1-M4 | MAXXECUSPORT-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
MAXXECUSPORT-C1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A1 | GPO 4 | — | W29 | — | 0.5 | OEM-E7-20 | — | — | — |
| A2 | IGN 1 | — | W17 | — | 0.5 | OEM-E7-11 | — | — | — |
| A3 | IGN 2 | — | W18 | — | 0.5 | OEM-E7-12 | — | — | — |
| A4 | GPO 8/TACHO | — | W36 | — | 0.5 | OEM-E3-4 | — | — | — |
| B1 | GPO 5 | — | W35 | — | 0.5 | OEM-E3-10 | — | — | — |
| B2 | IGN 3 | — | W19 | — | 0.5 | OEM-E7-13 | — | — | — |
| B3 | IGN 4 | — | — | — | — | — | — | — | — |
| B4 | GPO 1 | — | W26 | — | 0.5 | OEM-E7-17 | — | — | — |
| C1 | AIN 5 (0-5V) | — | W33 | — | 0.5 | OEM-E6-24 | — | — | — |
| C2 | IGN 5 | — | — | — | — | — | — | — | — |
| C3 | IGN 6 | — | — | — | — | — | — | — | — |
| C4 | GPO 2 | — | W27 | — | 0.5 | OEM-E7-18 | — | — | — |
| D1 | WBO2 Heater- | — | W37 | — | 0.5 | OEM-E4-13 | — | — | — |
| D2 | AIN 6 (0-5V) | — | W38 | — | 0.5 | OEM-E6-10 | — | — | — |
| D3 | AIN 7 (0-5V) | — | W39 | — | 0.5 | OEM-E2-24 | — | — | — |
| D4 | GPO 3 | — | W28 | — | 0.5 | OEM-E7-19 | — | — | — |
| E1 | CAN H | — | — | — | — | — | — | — | — |
| E2 | CAN L | — | — | — | — | — | — | — | — |
| E3 | GND Shield | — | — | — | — | — | — | — | — |
| E4 | AIN 8 (0-5V) | — | W40 | — | 0.5 | OEM-E4-8 | — | — | — |
| F1 | CLT | — | W34 | — | 0.5 | OEM-E6-14 | — | — | — |
| F2 | IAT | — | W41 | — | 0.5 | OEM-E6-22 | — | — | — |
| F3 | WBO2 VREF | — | — | — | — | — | — | — | — |
| F4 | WBO2 VS | — | — | — | — | — | — | — | — |
| G1 | +5V sensor supply | — | W14 | — | 0.5 | OEM-E6-2 | — | — | — |
| G2 | TPS/AIN | — | W30 | — | 0.5 | OEM-E6-15 | — | — | — |
| G3 | WBO2 IP | — | — | — | — | — | — | — | — |
| G4 | WBO2 RCAL | — | — | — | — | — | — | — | — |
| H1 | Sensor GND | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| H2 | Trigger GND | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| H3 | TRIGGER | — | W15 | — | 0.5 | OEM-E7-23 | — | — | — |
| H4 | HOME | — | W16 | — | 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 | — | W20 | — | 0.5 | OEM-E6-5 | — | — | — |
| K2 | INJ 2 | — | W21 | — | 0.5 | OEM-E6-6 | — | — | — |
| K3 | DIN 1 | — | W42 | — | 0.5 | OEM-E5-11 | — | — | — |
| K4 | DIN 2 | — | W43 | — | 0.5 | OEM-E5-5 | — | — | — |
| L1 | GPO 11/Motor 1- | — | — | — | — | — | — | — | — |
| L2 | GPO 12/MOTOR 1+ | — | — | — | — | — | — | — | — |
| L3 | INJ 6 | — | W25 | — | 0.5 | OEM-E7-4 | — | — | — |
| L4 | Engine GND | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| M1 | INJ 3 | — | W22 | — | 0.5 | OEM-E7-1 | — | — | — |
| M2 | INJ 4 | — | W23 | — | 0.5 | OEM-E7-2 | — | — | — |
| M3 | INJ 5 | — | W24 | — | 0.5 | OEM-E7-3 | — | — | — |
| M4 | +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) | — | W39 | — | 0.5 | MAXXECUSPORT-C1-D3 | — | — | — |
| 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) | — | W35 | — | 0.5 | MAXXECUSPORT-C1-B1 | — | — | — |
| 11 | Serial diagnostic (SIL) | — | — | — | — | — | — | — | — |
| 16 | EFI main relay (+B) | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 4 | Fuel pump relay (FPR) | — | W36 | — | 0.5 | MAXXECUSPORT-C1-A4 | — | — | — |
| 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) | — | W37 | — | 0.5 | MAXXECUSPORT-C1-D1 | — | — | — |
| 18 | EVAP vapor pressure (PTNK) | — | — | — | — | — | — | — | — |
| 2 | Starter signal (STA) | — | — | — | — | — | — | — | — |
| 5 | Diagnostic/timing check (TC) | — | — | — | — | — | — | — | — |
| 6 | Stop light switch (STP) | — | — | — | — | — | — | — | — |
| 8 | O2 left rear (OXL2) | — | W40 | — | 0.5 | MAXXECUSPORT-C1-E4 | — | — | — |
OEM-E5
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 11 | Vehicle speed sensor (SP2-) | — | W42 | — | 0.5 | MAXXECUSPORT-C1-K3 | — | — | — |
| 12 | Canister close valve (CCV) | — | — | — | — | — | — | — | — |
| 5 | Vehicle speed sensor (SP2+) | — | W43 | — | 0.5 | MAXXECUSPORT-C1-K4 | — | — | — |
OEM-E6
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 10 | Mass air flow (VG) | — | W38 | — | 0.5 | MAXXECUSPORT-C1-D2 | — | — | — |
| 11 | O2 right front (OXR1) | — | — | — | — | — | — | — | — |
| 12 | O2 left front (OXL1) | — | — | — | — | — | — | — | — |
| 14 | Coolant temperature (THW) | — | W34 | — | 0.5 | MAXXECUSPORT-C1-F1 | — | — | — |
| 15 | Accelerator pedal 1 (VPA) | — | W30 | — | 0.5 | MAXXECUSPORT-C1-G2 | — | — | — |
| 16 | Accelerator pedal 2 (VPA2) | — | W32 | — | 0.5 | MAXXECUSPORT-C1-J4 | — | — | — |
| 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) | — | W14 | — | 0.5 | MAXXECUSPORT-C1-G1 | — | — | — |
| 22 | Intake air temperature (THA) | — | W41 | — | 0.5 | MAXXECUSPORT-C1-F2 | — | — | — |
| 23 | Throttle position 1 (VTA) | — | W31 | — | 0.5 | MAXXECUSPORT-C1-J3 | — | — | — |
| 24 | Throttle position 2 (VTA2) | — | W33 | — | 0.5 | MAXXECUSPORT-C1-C1 | — | — | — |
| 3 | O2 heater right front (HTR) | — | — | — | — | — | — | — | — |
| 4 | O2 heater left front (HTL) | — | — | — | — | — | — | — | — |
| 5 | Injector 1 (#10) | — | W20 | — | 0.5 | MAXXECUSPORT-C1-K1 | — | — | — |
| 6 | Injector 2 (#20) | — | W21 | — | 0.5 | MAXXECUSPORT-C1-K2 | — | — | — |
| 7 | EVAP purge VSV (PRG) | — | — | — | — | — | — | — | — |
OEM-E7
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Injector 3 (#30) | — | W22 | — | 0.5 | MAXXECUSPORT-C1-M1 | — | — | — |
| 10 | Cam position (G2) | — | W16 | — | 0.5 | MAXXECUSPORT-C1-H4 | — | — | — |
| 11 | Ignition 1 (IGT) | — | W17 | — | 0.5 | MAXXECUSPORT-C1-A2 | — | — | — |
| 12 | Ignition 2 (IGT2) | — | W18 | — | 0.5 | MAXXECUSPORT-C1-A3 | — | — | — |
| 13 | Ignition 3 (IGT3) | — | W19 | — | 0.5 | MAXXECUSPORT-C1-B2 | — | — | — |
| 17 | VVT-i OCV - (OCV-) | — | W26 | — | 0.5 | MAXXECUSPORT-C1-B4 | — | — | — |
| 18 | VVT-i OCV + (OCV+) | — | W27 | — | 0.5 | MAXXECUSPORT-C1-C4 | — | — | — |
| 19 | ETCS throttle clutch - (CL-) | — | W28 | — | 0.5 | MAXXECUSPORT-C1-D4 | — | — | — |
| 2 | Injector 4 (#40) | — | W23 | — | 0.5 | MAXXECUSPORT-C1-M2 | — | — | — |
| 20 | ETCS throttle clutch + (CL+) | — | W29 | — | 0.5 | MAXXECUSPORT-C1-A1 | — | — | — |
| 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) | — | W15 | — | 0.5 | MAXXECUSPORT-C1-H3 | — | — | — |
| 25 | Igniter feedback (IGF) | — | — | — | — | — | — | — | — |
| 27 | Knock sensor 2 (KNK2) | — | — | — | — | — | — | — | — |
| 28 | Knock sensor 1 (KNK1) | — | — | — | — | — | — | — | — |
| 3 | Injector 5 (#50) | — | W24 | — | 0.5 | MAXXECUSPORT-C1-M3 | — | — | — |
| 4 | Injector 6 (#60) | — | W25 | — | 0.5 | MAXXECUSPORT-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 | — | — | W9 | — | 0.5 | OEM-E6-18 | — | — | — |
| 1 | — | — | W10 | — | 0.5 | OEM-E6-19 | — | — | — |
| 1 | — | — | W11 | — | 0.5 | OEM-E7-22 | — | — | — |
| 1 | — | — | W12 | — | 0.5 | MAXXECUSPORT-C1-H1 | — | — | — |
| 1 | — | — | W13 | — | 0.5 | MAXXECUSPORT-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 | — | — | — |
| 1 | — | — | W5 | — | 0.85 | MAXXECUSPORT-C1-M4 | — | — | — |
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 | MAXXECUSPORT-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 | MAXXECUSPORT-C1-M4 | +12V ECU power supply | power_in | single_source | |
| OEM-E2-24 | O2 right rear (OXR2) | lambda_nb_in | MAXXECUSPORT-C1-D3 | AIN 7 (0-5V) | analog_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 | MAXXECUSPORT-C1-B1 | GPO 5 | low_side_out | single_source | |
| OEM-E3-11 | Serial diagnostic (SIL) | serial | — | — | — | single_source | |
| OEM-E3-16 | EFI main relay (+B) | power_in | MAXXECUSPORT-C1-M4 | +12V ECU power supply | power_in | single_source | |
| OEM-E3-4 | Fuel pump relay (FPR) | low_side_out | MAXXECUSPORT-C1-A4 | GPO 8/TACHO | 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 | MAXXECUSPORT-C1-M4 | +12V ECU power supply | power_in | single_source | |
| OEM-E3-8 | EFI main relay (+B2) | power_in | MAXXECUSPORT-C1-M4 | +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 | MAXXECUSPORT-C1-D1 | WBO2 Heater- | 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 | MAXXECUSPORT-C1-E4 | AIN 8 (0-5V) | analog_in | single_source | |
| OEM-E5-11 | Vehicle speed sensor (SP2-) | digital_in | MAXXECUSPORT-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 | MAXXECUSPORT-C1-K4 | DIN 2 | digital_in | single_source | |
| OEM-E6-10 | Mass air flow (VG) | analog_in | MAXXECUSPORT-C1-D2 | AIN 6 (0-5V) | 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 | MAXXECUSPORT-C1-F1 | CLT | temp_in | single_source | |
| OEM-E6-15 | Accelerator pedal 1 (VPA) | analog_in | MAXXECUSPORT-C1-G2 | TPS/AIN | analog_in | single_source | |
| OEM-E6-16 | Accelerator pedal 2 (VPA2) | analog_in | MAXXECUSPORT-C1-J4 | AIN 4 (0-5V) | analog_in | single_source | |
| OEM-E6-17 | Power ground (E1) | ground | MAXXECUSPORT-C1-L4 | Engine GND | ground | single_source | |
| OEM-E6-18 | Sensor ground (E2) | sensor_ground | MAXXECUSPORT-C1-H1 + MAXXECUSPORT-C1-H2 | Sensor GND + Trigger GND | sensor_ground | single_source | |
| OEM-E6-19 | MAF ground (EVG) | sensor_ground | MAXXECUSPORT-C1-H1 + MAXXECUSPORT-C1-H2 | Sensor GND + Trigger GND | sensor_ground | single_source | |
| OEM-E6-2 | Sensor supply +5V (VC) | vref | MAXXECUSPORT-C1-G1 | +5V sensor supply | vref | single_source | |
| OEM-E6-22 | Intake air temperature (THA) | temp_in | MAXXECUSPORT-C1-F2 | IAT | temp_in | single_source | |
| OEM-E6-23 | Throttle position 1 (VTA) | analog_in | MAXXECUSPORT-C1-J3 | AIN 3 (0-5V) | analog_in | single_source | |
| OEM-E6-24 | Throttle position 2 (VTA2) | analog_in | MAXXECUSPORT-C1-C1 | AIN 5 (0-5V) | 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 | MAXXECUSPORT-C1-K1 | INJ 1 | injector_out | single_source | |
| OEM-E6-6 | Injector 2 (#20) | injector_out | MAXXECUSPORT-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 | MAXXECUSPORT-C1-M1 | INJ 3 | injector_out | single_source | |
| OEM-E7-10 | Cam position (G2) | trigger_in | MAXXECUSPORT-C1-H4 | HOME | trigger_in | single_source | |
| OEM-E7-11 | Ignition 1 (IGT) | ignition_out | MAXXECUSPORT-C1-A2 | IGN 1 | ignition_out | single_source | |
| OEM-E7-12 | Ignition 2 (IGT2) | ignition_out | MAXXECUSPORT-C1-A3 | IGN 2 | ignition_out | single_source | |
| OEM-E7-13 | Ignition 3 (IGT3) | ignition_out | MAXXECUSPORT-C1-B2 | IGN 3 | ignition_out | single_source | |
| OEM-E7-17 | VVT-i OCV - (OCV-) | low_side_out | MAXXECUSPORT-C1-B4 | GPO 1 | low_side_out | single_source | |
| OEM-E7-18 | VVT-i OCV + (OCV+) | low_side_out | MAXXECUSPORT-C1-C4 | GPO 2 | low_side_out | single_source | |
| OEM-E7-19 | ETCS throttle clutch - (CL-) | low_side_out | MAXXECUSPORT-C1-D4 | GPO 3 | low_side_out | single_source | |
| OEM-E7-2 | Injector 4 (#40) | injector_out | MAXXECUSPORT-C1-M2 | INJ 4 | injector_out | single_source | |
| OEM-E7-20 | ETCS throttle clutch + (CL+) | low_side_out | MAXXECUSPORT-C1-A1 | GPO 4 | low_side_out | single_source | |
| OEM-E7-21 | Power ground (E01) | ground | MAXXECUSPORT-C1-L4 | Engine GND | ground | single_source | |
| OEM-E7-22 | Crank position return (NE-) | sensor_ground | MAXXECUSPORT-C1-H1 + MAXXECUSPORT-C1-H2 | Sensor GND + Trigger GND | sensor_ground | single_source | |
| OEM-E7-23 | Crank position (NE) | trigger_in | MAXXECUSPORT-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 | MAXXECUSPORT-C1-M3 | INJ 5 | injector_out | single_source | |
| OEM-E7-4 | Injector 6 (#60) | injector_out | MAXXECUSPORT-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 | SP-14V-1 | MAXXECUSPORT-C1-M4 | 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 | MAXXECUSPORT-C1-L4 | 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 | MAXXECUSPORT-C1-H1 | 0.5 | no route | Sensor GND | — | |
| W13 | SP-0V-1 | MAXXECUSPORT-C1-H2 | 0.5 | no route | Trigger GND | — | |
| W14 | OEM-E6-2 | MAXXECUSPORT-C1-G1 | 0.5 | no route | Sensor supply +5V (VC) | — | |
| W15 | OEM-E7-23 | MAXXECUSPORT-C1-H3 | 0.5 | no route | Crank position (NE) | — | |
| W16 | OEM-E7-10 | MAXXECUSPORT-C1-H4 | 0.5 | no route | Cam position (G2) | — | |
| W17 | OEM-E7-11 | MAXXECUSPORT-C1-A2 | 0.5 | no route | Ignition 1 (IGT) | — | |
| W18 | OEM-E7-12 | MAXXECUSPORT-C1-A3 | 0.5 | no route | Ignition 2 (IGT2) | — | |
| W19 | OEM-E7-13 | MAXXECUSPORT-C1-B2 | 0.5 | no route | Ignition 3 (IGT3) | — | |
| W20 | OEM-E6-5 | MAXXECUSPORT-C1-K1 | 0.5 | no route | Injector 1 (#10) | — | |
| W21 | OEM-E6-6 | MAXXECUSPORT-C1-K2 | 0.5 | no route | Injector 2 (#20) | — | |
| W22 | OEM-E7-1 | MAXXECUSPORT-C1-M1 | 0.5 | no route | Injector 3 (#30) | — | |
| W23 | OEM-E7-2 | MAXXECUSPORT-C1-M2 | 0.5 | no route | Injector 4 (#40) | — | |
| W24 | OEM-E7-3 | MAXXECUSPORT-C1-M3 | 0.5 | no route | Injector 5 (#50) | — | |
| W25 | OEM-E7-4 | MAXXECUSPORT-C1-L3 | 0.5 | no route | Injector 6 (#60) | — | |
| W26 | OEM-E7-17 | MAXXECUSPORT-C1-B4 | 0.5 | no route | VVT-i OCV - (OCV-) | — | |
| W27 | OEM-E7-18 | MAXXECUSPORT-C1-C4 | 0.5 | no route | VVT-i OCV + (OCV+) | — | |
| W28 | OEM-E7-19 | MAXXECUSPORT-C1-D4 | 0.5 | no route | ETCS throttle clutch - (CL-) | — | |
| W29 | OEM-E7-20 | MAXXECUSPORT-C1-A1 | 0.5 | no route | ETCS throttle clutch + (CL+) | — | |
| W30 | OEM-E6-15 | MAXXECUSPORT-C1-G2 | 0.5 | no route | Accelerator pedal 1 (VPA) | — | |
| W31 | OEM-E6-23 | MAXXECUSPORT-C1-J3 | 0.5 | no route | Throttle position 1 (VTA) | — | |
| W32 | OEM-E6-16 | MAXXECUSPORT-C1-J4 | 0.5 | no route | Accelerator pedal 2 (VPA2) | — | |
| W33 | OEM-E6-24 | MAXXECUSPORT-C1-C1 | 0.5 | no route | Throttle position 2 (VTA2) | — | |
| W34 | OEM-E6-14 | MAXXECUSPORT-C1-F1 | 0.5 | no route | Coolant temperature (THW) | — | |
| W35 | OEM-E3-10 | MAXXECUSPORT-C1-B1 | 0.5 | no route | EFI main relay control (MREL) | — | |
| W36 | OEM-E3-4 | MAXXECUSPORT-C1-A4 | 0.5 | no route | Fuel pump relay (FPR) | — | |
| W37 | OEM-E4-13 | MAXXECUSPORT-C1-D1 | 0.5 | no route | A/C clutch relay (ACMG) | — | |
| W38 | OEM-E6-10 | MAXXECUSPORT-C1-D2 | 0.5 | no route | Mass air flow (VG) | — | |
| W39 | OEM-E2-24 | MAXXECUSPORT-C1-D3 | 0.5 | no route | O2 right rear (OXR2) | — | |
| W40 | OEM-E4-8 | MAXXECUSPORT-C1-E4 | 0.5 | no route | O2 left rear (OXL2) | — | |
| W41 | OEM-E6-22 | MAXXECUSPORT-C1-F2 | 0.5 | no route | Intake air temperature (THA) | — | |
| W42 | OEM-E5-11 | MAXXECUSPORT-C1-K3 | 0.5 | no route | Vehicle speed sensor (SP2-) | — | |
| W43 | OEM-E5-5 | MAXXECUSPORT-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-E3-9 | Required OEM function "Ignition switch (IGSW)" (digital_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 | MAXXECUSPORT-C1-A4 | MAXXECUSPORT-C1-A4 "GPO 8/TACHO" drives OEM-E3-4 Fuel pump relay (FPR) (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | MAXXECUSPORT-C1-B1 | MAXXECUSPORT-C1-B1 "GPO 5" drives OEM-E3-10 EFI main relay control (MREL) (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | MAXXECUSPORT-C1-D1 | MAXXECUSPORT-C1-D1 "WBO2 Heater-" drives OEM-E4-13 A/C clutch relay (ACMG) (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| info | UNMAPPED | OEM | 19 optional OEM pins are not mapped: OEM-E2-25 O2 heater right rear (HTR2); OEM-E2-26 O2 heater left rear (HTL2); OEM-E3-11 Serial diagnostic (SIL); OEM-E3-5 Fuel pump control (FC); OEM-E3-6 Check-engine lamp (W); 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-E5-12 Canister close valve (CCV); 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
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-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 SPORT has no dedicated key-on input - 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 SPORT has no battery-constant input; not needed - OEM-E7 28: Knock sensor 1 (KNK1): no free knock input on MaxxECU MaxxECU SPORT - OEM-E7 27: Knock sensor 2 (KNK2): no free knock input on MaxxECU MaxxECU SPORT - OEM-E2 25: O2 heater right rear (HTR2): no free heater_low_side/low_side/relay_control/ls_hs/injector on MaxxECU MaxxECU SPORT - OEM-E2 26: O2 heater left rear (HTL2): no free heater_low_side/low_side/relay_control/ls_hs/injector on MaxxECU MaxxECU SPORT - OEM-E6 3: O2 heater right front (HTR): no free heater_low_side/low_side/relay_control/ls_hs/injector on MaxxECU MaxxECU SPORT - OEM-E6 4: O2 heater left front (HTL): no free heater_low_side/low_side/relay_control/ls_hs/injector on MaxxECU MaxxECU SPORT - OEM-E3 5: Fuel pump control (FC): no free low_side/relay_control/heater_low_side/ls_hs/injector on MaxxECU MaxxECU SPORT - OEM-E3 6: Check-engine lamp (W): no free low_side/relay_control/heater_low_side/ls_hs/injector on MaxxECU MaxxECU SPORT - OEM-E5 12: Canister close valve (CCV): no free low_side/relay_control/heater_low_side/ls_hs/injector on MaxxECU MaxxECU SPORT - OEM-E6 7: EVAP purge VSV (PRG): no free low_side/relay_control/heater_low_side/ls_hs/injector on MaxxECU MaxxECU SPORT - OEM-E7 5: ACIS intake VSV: no free low_side/relay_control/heater_low_side/ls_hs/injector on MaxxECU MaxxECU SPORT - OEM-E6 11: O2 right front (OXR1): no free o2_narrowband/analog_0_5 on MaxxECU MaxxECU SPORT - OEM-E6 12: O2 left front (OXL1): no free o2_narrowband/analog_0_5 on MaxxECU MaxxECU SPORT - OEM-E4 18: EVAP vapor pressure (PTNK): no free analog_0_5 on MaxxECU MaxxECU SPORT - OEM-E7 25: Igniter feedback (IGF): no free frequency_in/switch_in on MaxxECU MaxxECU SPORT - OEM-E4 2: Starter signal (STA): no free switch_in/frequency_in/analog_0_5 on MaxxECU MaxxECU SPORT - OEM-E4 5: Diagnostic/timing check (TC): no free switch_in/frequency_in/analog_0_5 on MaxxECU MaxxECU SPORT - OEM-E4 6: Stop light switch (STP): no free switch_in/frequency_in/analog_0_5 on MaxxECU MaxxECU SPORT - OEM-E3 11: Serial diagnostic (SIL): no free k_line on MaxxECU MaxxECU SPORT
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 | — | — | — |