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Lexus IS300 (XE10 / JCE10) 2001-05 2JZ-GE VVT-i → Emtron SL6 (auto)

Lexus IS300 (XE10 / JCE10) 2001-05 2JZ-GE VVT-i — Emtron — SL6
⚠ 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.

Statusdraft · not yet verified: nobody has reported building and running this harness
Open errors2: read the Findings page before cutting any wire
Size of the job56 wires · 11 connectors · 3 part lines
ToolsCrimp and extraction tools for each terminal family (see Connectors) · wire strippers · multimeter · heat gun + heat-shrink
Terminals3-1447221-4
Order of work1. 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.

WireFromToGaugeColourCutLabelCrimp ACrimp BPin APin BContinuity
W1OEM-E2-13SP-14V-10.85☐☐☐☐☐☐☐
W2OEM-E3-16SP-14V-10.85☐☐☐☐☐☐☐
W3OEM-E3-7SP-14V-10.85☐☐☐☐☐☐☐
W4OEM-E3-8SP-14V-10.85☐☐☐☐☐☐☐
W5SP-14V-1SL6-A-340.85☐☐☐☐☐☐☐
W6SP-14V-1SL6-B-10.85☐☐☐☐☐☐☐
W7OEM-E6-17SP-GND-10.85☐☐☐☐☐☐☐
W8OEM-E7-21SP-GND-10.85☐☐☐☐☐☐☐
W9SP-GND-1SL6-B-180.85☐☐☐☐☐☐☐
W10SP-GND-1SL6-B-260.85☐☐☐☐☐☐☐
W11OEM-E6-18SP-0V-10.5☐☐☐☐☐☐☐
W12OEM-E6-19SP-0V-10.5☐☐☐☐☐☐☐
W13OEM-E7-22SP-0V-10.5☐☐☐☐☐☐☐
W14SP-0V-1SL6-B-100.5☐☐☐☐☐☐☐
W15OEM-E6-2SL6-B-20.5☐☐☐☐☐☐☐
W16OEM-E7-23SL6-B-50.5☐☐☐☐☐☐☐
W17SP-0V-1SL6-B-60.5☐☐☐☐☐☐☐
W18OEM-E7-10SL6-B-70.5☐☐☐☐☐☐☐
W19SP-0V-1SL6-B-80.5☐☐☐☐☐☐☐
W20OEM-E7-28SL6-B-160.5☐☐☐☐☐☐☐
W21OEM-E7-27SL6-B-240.5☐☐☐☐☐☐☐
W22OEM-E7-11SL6-A-260.5☐☐☐☐☐☐☐
W23OEM-E7-12SL6-A-270.5☐☐☐☐☐☐☐
W24OEM-E7-13SL6-A-280.5☐☐☐☐☐☐☐
W25OEM-E6-5SL6-A-10.5☐☐☐☐☐☐☐
W26OEM-E6-6SL6-A-20.5☐☐☐☐☐☐☐
W27OEM-E7-1SL6-A-30.5☐☐☐☐☐☐☐
W28OEM-E7-2SL6-A-40.5☐☐☐☐☐☐☐
W29OEM-E7-3SL6-A-50.5☐☐☐☐☐☐☐
W30OEM-E7-4SL6-A-60.5☐☐☐☐☐☐☐
W31OEM-E3-9SL6-B-40.5☐☐☐☐☐☐☐
W32OEM-E7-17SL6-B-30.5☐☐☐☐☐☐☐
W33OEM-E7-18SL6-A-140.5☐☐☐☐☐☐☐
W34OEM-E7-19SL6-A-150.5☐☐☐☐☐☐☐
W35OEM-E7-20SL6-A-160.5☐☐☐☐☐☐☐
W36OEM-E6-15SL6-B-110.5☐☐☐☐☐☐☐
W37OEM-E6-23SL6-B-120.5☐☐☐☐☐☐☐
W38OEM-E6-16SL6-B-130.5☐☐☐☐☐☐☐
W39OEM-E6-24SL6-B-140.5☐☐☐☐☐☐☐
W40OEM-E6-14SL6-B-150.5☐☐☐☐☐☐☐
W41OEM-E3-10SL6-A-170.5☐☐☐☐☐☐☐
W42OEM-E3-4SL6-A-100.5☐☐☐☐☐☐☐
W43OEM-E4-13SL6-A-110.5☐☐☐☐☐☐☐
W44OEM-E2-25SL6-A-120.5☐☐☐☐☐☐☐
W45OEM-E2-26SL6-A-130.5☐☐☐☐☐☐☐
W46OEM-E6-10SL6-B-190.5☐☐☐☐☐☐☐
W47OEM-E2-24SL6-B-200.5☐☐☐☐☐☐☐
W48OEM-E4-8SL6-B-210.5☐☐☐☐☐☐☐
W49OEM-E6-11SL6-B-220.5☐☐☐☐☐☐☐
W50OEM-E6-12SL6-B-230.5☐☐☐☐☐☐☐
W51OEM-E5-11SL6-A-200.5☐☐☐☐☐☐☐
W52OEM-E5-5SL6-A-210.5☐☐☐☐☐☐☐
W53OEM-E7-25SL6-A-220.5☐☐☐☐☐☐☐
W54OEM-E4-2SL6-A-230.5☐☐☐☐☐☐☐
W55OEM-E4-5SL6-A-240.5☐☐☐☐☐☐☐
W56OEM-E4-6SL6-A-250.5☐☐☐☐☐☐☐

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 AProbe BExpectWhyReading
1SL6-A-34SL6-B-10open (OL)+12 V supply must not touch sensor ground
2SL6-A-34SL6-B-18open (OL)+12 V supply must not touch power ground
3SL6-A-34SL6-B-2open (OL)+12 V supply must not touch 5 V sensor reference
4SL6-B-10SL6-B-2open (OL)sensor ground must not touch 5 V sensor reference
5SL6-B-18SL6-B-2open (OL)power ground must not touch 5 V sensor reference

If any reading doesn't match, stop and get help before powering up.

Revisions

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Schematic

OEM-E2OEM-E3OEM-E4OEM-E5OEM-E6OEM-E7SL6-ASL6-BSP-0VSP-14VSP-GND

Connectors

OEM-E2

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
13ETCS power (TBP, throttle bypass)—W1—0.85SP-14V-1———
24O2 right rear (OXR2)—W47—0.5SL6-B-20———
25O2 heater right rear (HTR2)—W44—0.5SL6-A-12———
26O2 heater left rear (HTL2)—W45—0.5SL6-A-13———

OEM-E3

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Battery constant (BATT)————————
10EFI main relay control (MREL)—W41—0.5SL6-A-17———
11Serial diagnostic (SIL)————————
16EFI main relay (+B)—W2—0.85SP-14V-1———
4Fuel pump relay (FPR)—W42—0.5SL6-A-10———
5Fuel pump control (FC)————————
6Check-engine lamp (W)————————
7ETCS main relay (+BM)—W3—0.85SP-14V-1———
8EFI main relay (+B2)—W4—0.85SP-14V-1———
9Ignition switch (IGSW)—W31—0.5SL6-B-4———

OEM-E4

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
13A/C clutch relay (ACMG)—W43—0.5SL6-A-11———
18EVAP vapor pressure (PTNK)————————
2Starter signal (STA)—W54—0.5SL6-A-23———
5Diagnostic/timing check (TC)—W55—0.5SL6-A-24———
6Stop light switch (STP)—W56—0.5SL6-A-25———
8O2 left rear (OXL2)—W48—0.5SL6-B-21———

OEM-E5

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
11Vehicle speed sensor (SP2-)—W51—0.5SL6-A-20———
12Canister close valve (CCV)————————
5Vehicle speed sensor (SP2+)—W52—0.5SL6-A-21———

OEM-E6

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
10Mass air flow (VG)—W46—0.5SL6-B-19———
11O2 right front (OXR1)—W49—0.5SL6-B-22———
12O2 left front (OXL1)—W50—0.5SL6-B-23———
14Coolant temperature (THW)—W40—0.5SL6-B-15———
15Accelerator pedal 1 (VPA)—W36—0.5SL6-B-11———
16Accelerator pedal 2 (VPA2)—W38—0.5SL6-B-13———
17Power ground (E1)—W7—0.85SP-GND-1———
18Sensor ground (E2)—W11—0.5SP-0V-1———
19MAF ground (EVG)—W12—0.5SP-0V-1———
2Sensor supply +5V (VC)—W15—0.5SL6-B-2———
22Intake air temperature (THA)————————
23Throttle position 1 (VTA)—W37—0.5SL6-B-12———
24Throttle position 2 (VTA2)—W39—0.5SL6-B-14———
3O2 heater right front (HTR)————————
4O2 heater left front (HTL)————————
5Injector 1 (#10)—W25—0.5SL6-A-1———
6Injector 2 (#20)—W26—0.5SL6-A-2———
7EVAP purge VSV (PRG)————————

OEM-E7

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Injector 3 (#30)—W27—0.5SL6-A-3———
10Cam position (G2)—W18—0.5SL6-B-7———
11Ignition 1 (IGT)—W22—0.5SL6-A-26———
12Ignition 2 (IGT2)—W23—0.5SL6-A-27———
13Ignition 3 (IGT3)—W24—0.5SL6-A-28———
17VVT-i OCV - (OCV-)—W32—0.5SL6-B-3———
18VVT-i OCV + (OCV+)—W33—0.5SL6-A-14———
19ETCS throttle clutch - (CL-)—W34—0.5SL6-A-15———
2Injector 4 (#40)—W28—0.5SL6-A-4———
20ETCS throttle clutch + (CL+)—W35—0.5SL6-A-16———
21Power ground (E01)—W8—0.85SP-GND-1———
22Crank position return (NE-)—W13—0.5SP-0V-1———
23Crank position (NE)—W16—0.5SL6-B-5———
25Igniter feedback (IGF)—W53—0.5SL6-A-22———
27Knock sensor 2 (KNK2)—W21—0.5SL6-B-24———
28Knock sensor 1 (KNK1)—W20—0.5SL6-B-16———
3Injector 5 (#50)—W29—0.5SL6-A-5———
4Injector 6 (#60)—W30—0.5SL6-A-6———
5ACIS intake VSV————————
7ETCS throttle motor - (M-)————————
8ETCS throttle motor + (M+)————————

SL6-A

Mating face
SL6-A-1 · Injection channel 11SL6-A-2 · Injection channel 22SL6-A-3 · Injection channel 33SL6-A-4 · Injection channel 44SL6-A-5 · Injection channel 55SL6-A-6 · Injection channel 66SL6-A-7 · NC7SL6-A-8 · NC8SL6-A-9 · Sensor supply 8V9SL6-A-10 · Auxiliary output 110SL6-A-11 · Auxiliary output 211SL6-A-12 · Auxiliary output 312SL6-A-13 · Auxiliary output 413SL6-A-14 · Auxiliary output 514SL6-A-15 · Auxiliary output 615SL6-A-16 · Auxiliary output 716SL6-A-17 · Auxiliary output 817SL6-A-18 · Auxiliary output 918SL6-A-19 · Auxiliary output 1019SL6-A-20 · Digital input 120SL6-A-21 · Digital input 221SL6-A-22 · Digital input 322SL6-A-23 · Digital input 423SL6-A-24 · Digital input 524SL6-A-25 · Digital input 625SL6-A-26 · Ignition channel 126SL6-A-27 · Ignition channel 227SL6-A-28 · Ignition channel 328SL6-A-29 · Ignition channel 429SL6-A-30 · Ignition channel 530SL6-A-31 · Ignition channel 631SL6-A-32 · NC32SL6-A-33 · NC33SL6-A-34 · Aux 9–10 14V supply34
Wire side
SL6-A-1 · Injection channel 11SL6-A-2 · Injection channel 22SL6-A-3 · Injection channel 33SL6-A-4 · Injection channel 44SL6-A-5 · Injection channel 55SL6-A-6 · Injection channel 66SL6-A-7 · NC7SL6-A-8 · NC8SL6-A-9 · Sensor supply 8V9SL6-A-10 · Auxiliary output 110SL6-A-11 · Auxiliary output 211SL6-A-12 · Auxiliary output 312SL6-A-13 · Auxiliary output 413SL6-A-14 · Auxiliary output 514SL6-A-15 · Auxiliary output 615SL6-A-16 · Auxiliary output 716SL6-A-17 · Auxiliary output 817SL6-A-18 · Auxiliary output 918SL6-A-19 · Auxiliary output 1019SL6-A-20 · Digital input 120SL6-A-21 · Digital input 221SL6-A-22 · Digital input 322SL6-A-23 · Digital input 423SL6-A-24 · Digital input 524SL6-A-25 · Digital input 625SL6-A-26 · Ignition channel 126SL6-A-27 · Ignition channel 227SL6-A-28 · Ignition channel 328SL6-A-29 · Ignition channel 429SL6-A-30 · Ignition channel 530SL6-A-31 · Ignition channel 631SL6-A-32 · NC32SL6-A-33 · NC33SL6-A-34 · Aux 9–10 14V supply34
CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Injection channel 1—W25—0.5OEM-E6-5———
2Injection channel 2—W26—0.5OEM-E6-6———
3Injection channel 3—W27—0.5OEM-E7-1———
4Injection channel 4—W28—0.5OEM-E7-2———
5Injection channel 5—W29—0.5OEM-E7-3———
6Injection channel 6—W30—0.5OEM-E7-4———
7NC————————
8NC————————
9Sensor supply 8V————————
10Auxiliary output 1—W42—0.5OEM-E3-4———
11Auxiliary output 2—W43—0.5OEM-E4-13———
12Auxiliary output 3—W44—0.5OEM-E2-25———
13Auxiliary output 4—W45—0.5OEM-E2-26———
14Auxiliary output 5—W33—0.5OEM-E7-18———
15Auxiliary output 6—W34—0.5OEM-E7-19———
16Auxiliary output 7—W35—0.5OEM-E7-20———
17Auxiliary output 8—W41—0.5OEM-E3-10———
18Auxiliary output 9————————
19Auxiliary output 10————————
20Digital input 1—W51—0.5OEM-E5-11———
21Digital input 2—W52—0.5OEM-E5-5———
22Digital input 3—W53—0.5OEM-E7-25———
23Digital input 4—W54—0.5OEM-E4-2———
24Digital input 5—W55—0.5OEM-E4-5———
25Digital input 6—W56—0.5OEM-E4-6———
26Ignition channel 1—W22—0.5OEM-E7-11———
27Ignition channel 2—W23—0.5OEM-E7-12———
28Ignition channel 3—W24—0.5OEM-E7-13———
29Ignition channel 4————————
30Ignition channel 5————————
31Ignition channel 6————————
32NC————————
33NC————————
34Aux 9–10 14V supply—W5—0.85SP-14V-1———

SL6-B

Mating face
SL6-B-1 · ECU 14V supply1SL6-B-2 · Sensor supply Vref1 5.0V2SL6-B-3 · EFI relay output (low side, 200 mA)3SL6-B-4 · Ignition switch input4SL6-B-5 · Crank index sensor +5SL6-B-6 · Crank index sensor −6SL6-B-7 · Sync sensor +7SL6-B-8 · Sync sensor −8SL6-B-9 · Shield (crank/sync/knock)9SL6-B-10 · Analog sensor 0V reference10SL6-B-11 · Analog input 111SL6-B-12 · Analog input 212SL6-B-13 · Analog input 313SL6-B-14 · Analog input 414SL6-B-15 · Analog input 515SL6-B-16 · Knock 1 +16SL6-B-17 · Knock 1 −17SL6-B-18 · ECU ground18SL6-B-19 · Analog input 619SL6-B-20 · Analog input 7 (switchable 1k pull-up)20SL6-B-21 · Analog input 8 (switchable 1k pull-up)21SL6-B-22 · Analog input 9 (switchable 1k pull-up)22SL6-B-23 · Analog input 10 (switchable 1k pull-up)23SL6-B-24 · Knock 2 +24SL6-B-25 · Knock 2 −25SL6-B-26 · ECU ground26SL6-B-27 · CAN 1 H27SL6-B-28 · CAN 1 L28SL6-B-29 · NC29SL6-B-30 · NC30SL6-B-31 · Ethernet Tx +31SL6-B-32 · Ethernet Tx −32SL6-B-33 · Ethernet Rx +33SL6-B-34 · Ethernet Rx −34
Wire side
SL6-B-1 · ECU 14V supply1SL6-B-2 · Sensor supply Vref1 5.0V2SL6-B-3 · EFI relay output (low side, 200 mA)3SL6-B-4 · Ignition switch input4SL6-B-5 · Crank index sensor +5SL6-B-6 · Crank index sensor −6SL6-B-7 · Sync sensor +7SL6-B-8 · Sync sensor −8SL6-B-9 · Shield (crank/sync/knock)9SL6-B-10 · Analog sensor 0V reference10SL6-B-11 · Analog input 111SL6-B-12 · Analog input 212SL6-B-13 · Analog input 313SL6-B-14 · Analog input 414SL6-B-15 · Analog input 515SL6-B-16 · Knock 1 +16SL6-B-17 · Knock 1 −17SL6-B-18 · ECU ground18SL6-B-19 · Analog input 619SL6-B-20 · Analog input 7 (switchable 1k pull-up)20SL6-B-21 · Analog input 8 (switchable 1k pull-up)21SL6-B-22 · Analog input 9 (switchable 1k pull-up)22SL6-B-23 · Analog input 10 (switchable 1k pull-up)23SL6-B-24 · Knock 2 +24SL6-B-25 · Knock 2 −25SL6-B-26 · ECU ground26SL6-B-27 · CAN 1 H27SL6-B-28 · CAN 1 L28SL6-B-29 · NC29SL6-B-30 · NC30SL6-B-31 · Ethernet Tx +31SL6-B-32 · Ethernet Tx −32SL6-B-33 · Ethernet Rx +33SL6-B-34 · Ethernet Rx −34
CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1ECU 14V supply—W6—0.85SP-14V-1———
2Sensor supply Vref1 5.0V—W15—0.5OEM-E6-2———
3EFI relay output (low side, 200 mA)—W32—0.5OEM-E7-17———
4Ignition switch input—W31—0.5OEM-E3-9———
5Crank index sensor +—W16—0.5OEM-E7-23———
6Crank index sensor −—W17—0.5SP-0V-1———
7Sync sensor +—W18—0.5OEM-E7-10———
8Sync sensor −—W19—0.5SP-0V-1———
9Shield (crank/sync/knock)————————
10Analog sensor 0V reference—W14—0.5SP-0V-1———
11Analog input 1—W36—0.5OEM-E6-15———
12Analog input 2—W37—0.5OEM-E6-23———
13Analog input 3—W38—0.5OEM-E6-16———
14Analog input 4—W39—0.5OEM-E6-24———
15Analog input 5—W40—0.5OEM-E6-14———
16Knock 1 +—W20—0.5OEM-E7-28———
17Knock 1 −————————
18ECU ground—W9—0.85SP-GND-1———
19Analog input 6—W46—0.5OEM-E6-10———
20Analog input 7 (switchable 1k pull-up)—W47—0.5OEM-E2-24———
21Analog input 8 (switchable 1k pull-up)—W48—0.5OEM-E4-8———
22Analog input 9 (switchable 1k pull-up)—W49—0.5OEM-E6-11———
23Analog input 10 (switchable 1k pull-up)—W50—0.5OEM-E6-12———
24Knock 2 +—W21—0.5OEM-E7-27———
25Knock 2 −————————
26ECU ground—W10—0.85SP-GND-1———
27CAN 1 H————————
28CAN 1 L————————
29NC————————
30NC————————
31Ethernet Tx +————————
32Ethernet Tx −————————
33Ethernet Rx +————————
34Ethernet Rx −————————

SP-0V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W11—0.5OEM-E6-18———
1——W12—0.5OEM-E6-19———
1——W13—0.5OEM-E7-22———
1——W14—0.5SL6-B-10———
1——W17—0.5SL6-B-6———
1——W19—0.5SL6-B-8———

SP-14V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W1—0.85OEM-E2-13———
1——W2—0.85OEM-E3-16———
1——W3—0.85OEM-E3-7———
1——W4—0.85OEM-E3-8———
1——W5—0.85SL6-A-34———
1——W6—0.85SL6-B-1———

SP-GND

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W7—0.85OEM-E6-17———
1——W8—0.85OEM-E7-21———
1——W9—0.85SL6-B-18———
1——W10—0.85SL6-B-26———

Pin map

OEM pointOEM functionOEM familyTarget pointTarget functionTarget familyWire colourEvidence
OEM-E2-13ETCS power (TBP, throttle bypass)power_inSL6-A-34 + SL6-B-1Aux 9–10 14V supply + ECU 14V supplypower_insingle_source
OEM-E2-24O2 right rear (OXR2)lambda_nb_inSL6-B-20Analog input 7 (switchable 1k pull-up)analog_insingle_source
OEM-E2-25O2 heater right rear (HTR2)low_side_outSL6-A-12Auxiliary output 3switch_outsingle_source
OEM-E2-26O2 heater left rear (HTL2)low_side_outSL6-A-13Auxiliary output 4switch_outsingle_source
OEM-E3-1Battery constant (BATT)power_in———single_source
OEM-E3-10EFI main relay control (MREL)low_side_outSL6-A-17Auxiliary output 8switch_outsingle_source
OEM-E3-11Serial diagnostic (SIL)serial———single_source
OEM-E3-16EFI main relay (+B)power_inSL6-A-34 + SL6-B-1Aux 9–10 14V supply + ECU 14V supplypower_insingle_source
OEM-E3-4Fuel pump relay (FPR)low_side_outSL6-A-10Auxiliary output 1switch_outsingle_source
OEM-E3-5Fuel pump control (FC)low_side_out———single_source
OEM-E3-6Check-engine lamp (W)low_side_out———single_source
OEM-E3-7ETCS main relay (+BM)power_inSL6-A-34 + SL6-B-1Aux 9–10 14V supply + ECU 14V supplypower_insingle_source
OEM-E3-8EFI main relay (+B2)power_inSL6-A-34 + SL6-B-1Aux 9–10 14V supply + ECU 14V supplypower_insingle_source
OEM-E3-9Ignition switch (IGSW)digital_inSL6-B-4Ignition switch inputdigital_insingle_source
OEM-E4-13A/C clutch relay (ACMG)low_side_outSL6-A-11Auxiliary output 2switch_outsingle_source
OEM-E4-18EVAP vapor pressure (PTNK)analog_in———single_source
OEM-E4-2Starter signal (STA)digital_inSL6-A-23Digital input 4digital_insingle_source
OEM-E4-5Diagnostic/timing check (TC)digital_inSL6-A-24Digital input 5digital_insingle_source
OEM-E4-6Stop light switch (STP)digital_inSL6-A-25Digital input 6digital_insingle_source
OEM-E4-8O2 left rear (OXL2)lambda_nb_inSL6-B-21Analog input 8 (switchable 1k pull-up)analog_insingle_source
OEM-E5-11Vehicle speed sensor (SP2-)digital_inSL6-A-20Digital input 1digital_insingle_source
OEM-E5-12Canister close valve (CCV)low_side_out———single_source
OEM-E5-5Vehicle speed sensor (SP2+)digital_inSL6-A-21Digital input 2digital_insingle_source
OEM-E6-10Mass air flow (VG)analog_inSL6-B-19Analog input 6analog_insingle_source
OEM-E6-11O2 right front (OXR1)lambda_nb_inSL6-B-22Analog input 9 (switchable 1k pull-up)analog_insingle_source
OEM-E6-12O2 left front (OXL1)lambda_nb_inSL6-B-23Analog input 10 (switchable 1k pull-up)analog_insingle_source
OEM-E6-14Coolant temperature (THW)temp_inSL6-B-15Analog input 5analog_insingle_source
OEM-E6-15Accelerator pedal 1 (VPA)analog_inSL6-B-11Analog input 1analog_insingle_source
OEM-E6-16Accelerator pedal 2 (VPA2)analog_inSL6-B-13Analog input 3analog_insingle_source
OEM-E6-17Power ground (E1)groundSL6-B-18 + SL6-B-26ECU ground + ECU groundgroundsingle_source
OEM-E6-18Sensor ground (E2)sensor_groundSL6-B-10 + SL6-B-6 + SL6-B-8Analog sensor 0V reference + Crank index sensor − + Sync sensor −sensor_ground + trigger_insingle_source
OEM-E6-19MAF ground (EVG)sensor_groundSL6-B-10 + SL6-B-6 + SL6-B-8Analog sensor 0V reference + Crank index sensor − + Sync sensor −sensor_ground + trigger_insingle_source
OEM-E6-2Sensor supply +5V (VC)vrefSL6-B-2Sensor supply Vref1 5.0Vvrefsingle_source
OEM-E6-22Intake air temperature (THA)temp_in———single_source
OEM-E6-23Throttle position 1 (VTA)analog_inSL6-B-12Analog input 2analog_insingle_source
OEM-E6-24Throttle position 2 (VTA2)analog_inSL6-B-14Analog input 4analog_insingle_source
OEM-E6-3O2 heater right front (HTR)low_side_out———single_source
OEM-E6-4O2 heater left front (HTL)low_side_out———single_source
OEM-E6-5Injector 1 (#10)injector_outSL6-A-1Injection channel 1injector_outsingle_source
OEM-E6-6Injector 2 (#20)injector_outSL6-A-2Injection channel 2injector_outsingle_source
OEM-E6-7EVAP purge VSV (PRG)low_side_out———single_source
OEM-E7-1Injector 3 (#30)injector_outSL6-A-3Injection channel 3injector_outsingle_source
OEM-E7-10Cam position (G2)trigger_inSL6-B-7Sync sensor +trigger_insingle_source
OEM-E7-11Ignition 1 (IGT)ignition_outSL6-A-26Ignition channel 1ignition_outsingle_source
OEM-E7-12Ignition 2 (IGT2)ignition_outSL6-A-27Ignition channel 2ignition_outsingle_source
OEM-E7-13Ignition 3 (IGT3)ignition_outSL6-A-28Ignition channel 3ignition_outsingle_source
OEM-E7-17VVT-i OCV - (OCV-)low_side_outSL6-B-3EFI relay output (low side, 200 mA)low_side_outsingle_source
OEM-E7-18VVT-i OCV + (OCV+)low_side_outSL6-A-14Auxiliary output 5switch_outsingle_source
OEM-E7-19ETCS throttle clutch - (CL-)low_side_outSL6-A-15Auxiliary output 6switch_outsingle_source
OEM-E7-2Injector 4 (#40)injector_outSL6-A-4Injection channel 4injector_outsingle_source
OEM-E7-20ETCS throttle clutch + (CL+)low_side_outSL6-A-16Auxiliary output 7switch_outsingle_source
OEM-E7-21Power ground (E01)groundSL6-B-18 + SL6-B-26ECU ground + ECU groundgroundsingle_source
OEM-E7-22Crank position return (NE-)sensor_groundSL6-B-10 + SL6-B-6 + SL6-B-8Analog sensor 0V reference + Crank index sensor − + Sync sensor −sensor_ground + trigger_insingle_source
OEM-E7-23Crank position (NE)trigger_inSL6-B-5Crank index sensor +trigger_insingle_source
OEM-E7-25Igniter feedback (IGF)digital_inSL6-A-22Digital input 3digital_insingle_source
OEM-E7-27Knock sensor 2 (KNK2)knock_inSL6-B-24Knock 2 +knock_insingle_source
OEM-E7-28Knock sensor 1 (KNK1)knock_inSL6-B-16Knock 1 +knock_insingle_source
OEM-E7-3Injector 5 (#50)injector_outSL6-A-5Injection channel 5injector_outsingle_source
OEM-E7-4Injector 6 (#60)injector_outSL6-A-6Injection channel 6injector_outsingle_source
OEM-E7-5ACIS intake VSVlow_side_out———single_source
OEM-E7-7ETCS throttle motor - (M-)hbridge_out———single_source
OEM-E7-8ETCS throttle motor + (M+)hbridge_out———single_source

Cut list

WireFromToGauge (mm²)ColourLengthSignalIdent
W1OEM-E2-13SP-14V-10.85no routeETCS power (TBP, throttle bypass)—
W2OEM-E3-16SP-14V-10.85no routeEFI main relay (+B)—
W3OEM-E3-7SP-14V-10.85no routeETCS main relay (+BM)—
W4OEM-E3-8SP-14V-10.85no routeEFI main relay (+B2)—
W5SP-14V-1SL6-A-340.85no routeAux 9–10 14V supply—
W6SP-14V-1SL6-B-10.85no routeECU 14V supply—
W7OEM-E6-17SP-GND-10.85no routePower ground (E1)—
W8OEM-E7-21SP-GND-10.85no routePower ground (E01)—
W9SP-GND-1SL6-B-180.85no routeECU ground—
W10SP-GND-1SL6-B-260.85no routeECU ground—
W11OEM-E6-18SP-0V-10.5no routeSensor ground (E2)—
W12OEM-E6-19SP-0V-10.5no routeMAF ground (EVG)—
W13OEM-E7-22SP-0V-10.5no routeCrank position return (NE-)—
W14SP-0V-1SL6-B-100.5no routeAnalog sensor 0V reference—
W15OEM-E6-2SL6-B-20.5no routeSensor supply +5V (VC)—
W16OEM-E7-23SL6-B-50.5no routeCrank position (NE)—
W17SP-0V-1SL6-B-60.5no routeCrank index sensor −—
W18OEM-E7-10SL6-B-70.5no routeCam position (G2)—
W19SP-0V-1SL6-B-80.5no routeSync sensor −—
W20OEM-E7-28SL6-B-160.5no routeKnock sensor 1 (KNK1)—
W21OEM-E7-27SL6-B-240.5no routeKnock sensor 2 (KNK2)—
W22OEM-E7-11SL6-A-260.5no routeIgnition 1 (IGT)—
W23OEM-E7-12SL6-A-270.5no routeIgnition 2 (IGT2)—
W24OEM-E7-13SL6-A-280.5no routeIgnition 3 (IGT3)—
W25OEM-E6-5SL6-A-10.5no routeInjector 1 (#10)—
W26OEM-E6-6SL6-A-20.5no routeInjector 2 (#20)—
W27OEM-E7-1SL6-A-30.5no routeInjector 3 (#30)—
W28OEM-E7-2SL6-A-40.5no routeInjector 4 (#40)—
W29OEM-E7-3SL6-A-50.5no routeInjector 5 (#50)—
W30OEM-E7-4SL6-A-60.5no routeInjector 6 (#60)—
W31OEM-E3-9SL6-B-40.5no routeIgnition switch (IGSW)—
W32OEM-E7-17SL6-B-30.5no routeVVT-i OCV - (OCV-)—
W33OEM-E7-18SL6-A-140.5no routeVVT-i OCV + (OCV+)—
W34OEM-E7-19SL6-A-150.5no routeETCS throttle clutch - (CL-)—
W35OEM-E7-20SL6-A-160.5no routeETCS throttle clutch + (CL+)—
W36OEM-E6-15SL6-B-110.5no routeAccelerator pedal 1 (VPA)—
W37OEM-E6-23SL6-B-120.5no routeThrottle position 1 (VTA)—
W38OEM-E6-16SL6-B-130.5no routeAccelerator pedal 2 (VPA2)—
W39OEM-E6-24SL6-B-140.5no routeThrottle position 2 (VTA2)—
W40OEM-E6-14SL6-B-150.5no routeCoolant temperature (THW)—
W41OEM-E3-10SL6-A-170.5no routeEFI main relay control (MREL)—
W42OEM-E3-4SL6-A-100.5no routeFuel pump relay (FPR)—
W43OEM-E4-13SL6-A-110.5no routeA/C clutch relay (ACMG)—
W44OEM-E2-25SL6-A-120.5no routeO2 heater right rear (HTR2)—
W45OEM-E2-26SL6-A-130.5no routeO2 heater left rear (HTL2)—
W46OEM-E6-10SL6-B-190.5no routeMass air flow (VG)—
W47OEM-E2-24SL6-B-200.5no routeO2 right rear (OXR2)—
W48OEM-E4-8SL6-B-210.5no routeO2 left rear (OXL2)—
W49OEM-E6-11SL6-B-220.5no routeO2 right front (OXR1)—
W50OEM-E6-12SL6-B-230.5no routeO2 left front (OXL1)—
W51OEM-E5-11SL6-A-200.5no routeVehicle speed sensor (SP2-)—
W52OEM-E5-5SL6-A-210.5no routeVehicle speed sensor (SP2+)—
W53OEM-E7-25SL6-A-220.5no routeIgniter feedback (IGF)—
W54OEM-E4-2SL6-A-230.5no routeStarter signal (STA)—
W55OEM-E4-5SL6-A-240.5no routeDiagnostic/timing check (TC)—
W56OEM-E4-6SL6-A-250.5no routeStop light switch (STP)—

Bill of materials

CategoryPart numberManufacturerDescriptionQtyUnit
connector4-1437290-0TESuperseal 1.0 34-way plug, Key 11.000ea
connector4-1437290-1TESuperseal 1.0 34-way plug, Key 21.000ea
terminal3-1447221-4TESuperseal 1.0 socket terminal, 20 AWG (0.5 sq mm)47.000ea

ECU setup sheet

RoleEngine refEngine signalSensorECU pointECU functionECU classSetup flag
No configured channels.

Findings

Open (13)

SeverityCodeSubjectMessage
errorREQUIRED_UNMAPPEDOEM-E7-7Required OEM function "ETCS throttle motor - (M-)" (hbridge_out) is not connected to the new ECU.
errorREQUIRED_UNMAPPEDOEM-E7-8Required OEM function "ETCS throttle motor + (M+)" (hbridge_out) is not connected to the new ECU.
infoNET_FAMILYOEM-E2-25 ↔ SL6-A-12OEM-E2-25 "O2 heater right rear (HTR2)" [low_side_out] is wired to SL6-A-12 "Auxiliary output 3" [switch_out]. Configure this output as low side.
infoNET_FAMILYOEM-E2-26 ↔ SL6-A-13OEM-E2-26 "O2 heater left rear (HTL2)" [low_side_out] is wired to SL6-A-13 "Auxiliary output 4" [switch_out]. Configure this output as low side.
infoNET_FAMILYOEM-E3-10 ↔ SL6-A-17OEM-E3-10 "EFI main relay control (MREL)" [low_side_out] is wired to SL6-A-17 "Auxiliary output 8" [switch_out]. Configure this output as low side.
infoNET_FAMILYOEM-E3-4 ↔ SL6-A-10OEM-E3-4 "Fuel pump relay (FPR)" [low_side_out] is wired to SL6-A-10 "Auxiliary output 1" [switch_out]. Configure this output as low side.
infoNET_FAMILYOEM-E4-13 ↔ SL6-A-11OEM-E4-13 "A/C clutch relay (ACMG)" [low_side_out] is wired to SL6-A-11 "Auxiliary output 2" [switch_out]. Configure this output as low side.
infoNET_FAMILYOEM-E6-14 ↔ SL6-B-15OEM-E6-14 "Coolant temperature (THW)" [temp_in] is wired to SL6-B-15 "Analog input 5" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one.
infoNET_FAMILYOEM-E6-18 ↔ SL6-B-6OEM-E6-18 "Sensor ground (E2)" [sensor_ground] is wired to SL6-B-6 "Crank index sensor −" [trigger_in]. Trigger return tied to sensor/trigger ground: correct for single-ended trigger inputs.
infoNET_FAMILYOEM-E7-18 ↔ SL6-A-14OEM-E7-18 "VVT-i OCV + (OCV+)" [low_side_out] is wired to SL6-A-14 "Auxiliary output 5" [switch_out]. Configure this output as low side.
infoNET_FAMILYOEM-E7-19 ↔ SL6-A-15OEM-E7-19 "ETCS throttle clutch - (CL-)" [low_side_out] is wired to SL6-A-15 "Auxiliary output 6" [switch_out]. Configure this output as low side.
infoNET_FAMILYOEM-E7-20 ↔ SL6-A-16OEM-E7-20 "ETCS throttle clutch + (CL+)" [low_side_out] is wired to SL6-A-16 "Auxiliary output 7" [switch_out]. Configure this output as low side.
infoUNMAPPEDOEM10 optional OEM pins are not mapped: 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-E5-12 Canister close valve (CCV); OEM-E6-22 Intake air temperature (THA); OEM-E6-3 O2 heater right front (HTR); OEM-E6-4 O2 heater left front (HTL); OEM-E6-7 EVAP purge VSV (PRG); OEM-E7-5 ACIS intake VSV

Accepted (1)

CodeSubjectReasonBy
REQUIRED_UNMAPPEDOEM-E3-1Battery-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-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): Emtron SL6 has no battery-constant input; not needed - SL6-B 17: Knock 1 − left open: the stock knock sensor has one ECU wire; check the ECU manual for single-wire knock sensors - SL6-B 25: Knock 2 − left open: the stock knock sensor has one ECU wire; check the ECU manual for single-wire knock sensors - OEM-E6 3: O2 heater right front (HTR): no free heater_low_side/low_side/relay_control/ls_hs/injector on Emtron SL6 - OEM-E6 4: O2 heater left front (HTL): no free heater_low_side/low_side/relay_control/ls_hs/injector on Emtron SL6 - OEM-E3 5: Fuel pump control (FC): no free low_side/relay_control/heater_low_side/ls_hs/injector on Emtron SL6 - OEM-E3 6: Check-engine lamp (W): no free low_side/relay_control/heater_low_side/ls_hs/injector on Emtron SL6 - OEM-E5 12: Canister close valve (CCV): no free low_side/relay_control/heater_low_side/ls_hs/injector on Emtron SL6 - OEM-E6 7: EVAP purge VSV (PRG): no free low_side/relay_control/heater_low_side/ls_hs/injector on Emtron SL6 - OEM-E7 5: ACIS intake VSV: no free low_side/relay_control/heater_low_side/ls_hs/injector on Emtron SL6 - OEM-E6 22: Intake air temperature (THA): no free thermistor/analog_0_5 on Emtron SL6 - OEM-E4 18: EVAP vapor pressure (PTNK): no free analog_0_5 on Emtron SL6 - OEM-E3 11: Serial diagnostic (SIL): no free k_line on Emtron SL6

Sources

ReliabilityKindTitleURLArchiveCapturedSHA-256
4vendor_docEmtron SL4/SL6/SL8 ECU datasheetshttps://docs.emtronaustralia.com.au/engine-management/datasheets/index.htmlarchive2026-10-051e22846cec94
4vendor_docEmtron SL4/SL6/SL8 pinout pageshttps://docs.emtronaustralia.com.au/engine-management/wiring/index.htmlarchive2026-10-05e52b3da9996a
4service_manualToyota 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———