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Lexus LS400 1998-2000 (1UZ-FE VVT-i) → MoTeC M800 universal (auto)

Lexus LS400 1998-2000 (1UZ-FE VVT-i) — MoTeC — M800
⚠ 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 errors7: read the Findings page before cutting any wire
Size of the job52 wires · 10 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-E15-16SP-14V-10.85☐☐☐☐☐☐☐
W2OEM-E15-7SP-14V-10.85☐☐☐☐☐☐☐
W3OEM-E15-8SP-14V-10.85☐☐☐☐☐☐☐
W4SP-14V-1M800-A-260.85☐☐☐☐☐☐☐
W5OEM-E13-17SP-GND-10.85☐☐☐☐☐☐☐
W6OEM-E14-21SP-GND-10.85☐☐☐☐☐☐☐
W7SP-GND-1M800-A-100.85☐☐☐☐☐☐☐
W8SP-GND-1M800-A-110.85☐☐☐☐☐☐☐
W9OEM-E13-18SP-0V-10.5☐☐☐☐☐☐☐
W10OEM-E13-19SP-0V-10.5☐☐☐☐☐☐☐
W11SP-0V-1M800-B-140.5☐☐☐☐☐☐☐
W12SP-0V-1M800-B-150.5☐☐☐☐☐☐☐
W13SP-0V-1M800-B-160.5☐☐☐☐☐☐☐
W14OEM-E13-2M800-A-20.5☐☐☐☐☐☐☐
W15OEM-E14-23M800-B-10.5☐☐☐☐☐☐☐
W16OEM-E14-22SP-0V-10.5☐☐☐☐☐☐☐
W17OEM-E14-10M800-B-20.5☐☐☐☐☐☐☐
W18OEM-E14-11M800-A-30.5☐☐☐☐☐☐☐
W19OEM-E14-12M800-A-40.5☐☐☐☐☐☐☐
W20OEM-E14-13M800-A-50.5☐☐☐☐☐☐☐
W21OEM-E14-14M800-A-60.5☐☐☐☐☐☐☐
W22OEM-E14-15M800-A-70.5☐☐☐☐☐☐☐
W23OEM-E14-16M800-A-80.5☐☐☐☐☐☐☐
W24OEM-E13-5M800-A-190.5☐☐☐☐☐☐☐
W25OEM-E13-6M800-A-200.5☐☐☐☐☐☐☐
W26OEM-E14-1M800-A-210.5☐☐☐☐☐☐☐
W27OEM-E14-2M800-A-220.5☐☐☐☐☐☐☐
W28OEM-E14-3M800-A-270.5☐☐☐☐☐☐☐
W29OEM-E14-4M800-A-280.5☐☐☐☐☐☐☐
W30OEM-E14-5M800-A-290.5☐☐☐☐☐☐☐
W31OEM-E14-6M800-A-300.5☐☐☐☐☐☐☐
W32OEM-E11-19M800-A-180.5☐☐☐☐☐☐☐
W33OEM-E14-20M800-A-10.5☐☐☐☐☐☐☐
W34OEM-E13-10M800-A-140.5☐☐☐☐☐☐☐
W35OEM-E13-13M800-A-150.5☐☐☐☐☐☐☐
W36OEM-E13-21M800-A-160.5☐☐☐☐☐☐☐
W37OEM-E13-20M800-A-170.5☐☐☐☐☐☐☐
W38OEM-E13-9M800-A-250.5☐☐☐☐☐☐☐
W39OEM-E13-14M800-B-30.5☐☐☐☐☐☐☐
W40OEM-E15-10M800-A-230.5☐☐☐☐☐☐☐
W41OEM-E15-5M800-A-240.5☐☐☐☐☐☐☐
W42OEM-E11-7M800-A-310.5☐☐☐☐☐☐☐
W43OEM-E11-8M800-A-320.5☐☐☐☐☐☐☐
W44OEM-E13-3M800-A-330.5☐☐☐☐☐☐☐
W45OEM-E13-4M800-A-340.5☐☐☐☐☐☐☐
W46OEM-E11-18M800-B-200.5☐☐☐☐☐☐☐
W47OEM-E11-27M800-B-210.5☐☐☐☐☐☐☐
W48OEM-E13-11M800-B-220.5☐☐☐☐☐☐☐
W49OEM-E13-22M800-B-40.5☐☐☐☐☐☐☐
W50OEM-E14-27M800-B-80.5☐☐☐☐☐☐☐
W51OEM-E14-28M800-B-90.5☐☐☐☐☐☐☐
W52OEM-E11-17M800-B-100.5☐☐☐☐☐☐☐

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
1M800-A-10M800-A-2open (OL)power ground must not touch 5 V sensor reference
2M800-A-10M800-A-26open (OL)power ground must not touch +12 V supply
3M800-A-2M800-A-26open (OL)5 V sensor reference must not touch +12 V supply
4M800-B-14M800-A-2open (OL)sensor ground must not touch 5 V sensor reference
5M800-B-14M800-A-26open (OL)sensor ground must not touch +12 V supply

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

Revisions

RevLabelByDate
No revisions yet.

Schematic

M800-AM800-BOEM-E11OEM-E12OEM-E13OEM-E14OEM-E15SP-0VSP-14VSP-GND

Connectors

M800-A

Mating face
M800-A-1 · AUX21M800-A-2 · 5V Engine Sensor Supply2M800-A-3 · IGN13M800-A-4 · IGN24M800-A-5 · IGN35M800-A-6 · IGN46M800-A-7 · IGN57M800-A-8 · IGN68M800-A-9 · 5V Auxiliary Sensor Supply9M800-A-10 · GND Battery Negative10M800-A-11 · GND Battery Negative11M800-A-12 · 8V Engine Sensor Supply12M800-A-13 · 8V Auxiliary Sensor and CAN Supply13M800-A-14 · AV114M800-A-15 · Analog Voltage Input 215M800-A-16 · Analog Voltage Input 316M800-A-17 · Analog Voltage Input 417M800-A-18 · AUX118M800-A-19 · INJ119M800-A-20 · INJ220M800-A-21 · INJ321M800-A-22 · INJ422M800-A-23 · AUX323M800-A-24 · AUX424M800-A-25 · Analog Voltage Input 525M800-A-26 · VBAT Battery Positive26M800-A-27 · INJ527M800-A-28 · INJ628M800-A-29 · INJ729M800-A-30 · INJ830M800-A-31 · AUX531M800-A-32 · AUX632M800-A-33 · AUX733M800-A-34 · AUX834
Wire side
M800-A-1 · AUX21M800-A-2 · 5V Engine Sensor Supply2M800-A-3 · IGN13M800-A-4 · IGN24M800-A-5 · IGN35M800-A-6 · IGN46M800-A-7 · IGN57M800-A-8 · IGN68M800-A-9 · 5V Auxiliary Sensor Supply9M800-A-10 · GND Battery Negative10M800-A-11 · GND Battery Negative11M800-A-12 · 8V Engine Sensor Supply12M800-A-13 · 8V Auxiliary Sensor and CAN Supply13M800-A-14 · AV114M800-A-15 · Analog Voltage Input 215M800-A-16 · Analog Voltage Input 316M800-A-17 · Analog Voltage Input 417M800-A-18 · AUX118M800-A-19 · INJ119M800-A-20 · INJ220M800-A-21 · INJ321M800-A-22 · INJ422M800-A-23 · AUX323M800-A-24 · AUX424M800-A-25 · Analog Voltage Input 525M800-A-26 · VBAT Battery Positive26M800-A-27 · INJ527M800-A-28 · INJ628M800-A-29 · INJ729M800-A-30 · INJ830M800-A-31 · AUX531M800-A-32 · AUX632M800-A-33 · AUX733M800-A-34 · AUX834
CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1AUX2—W33—0.5OEM-E14-20———
25V Engine Sensor Supply—W14—0.5OEM-E13-2———
3IGN1—W18—0.5OEM-E14-11———
4IGN2—W19—0.5OEM-E14-12———
5IGN3—W20—0.5OEM-E14-13———
6IGN4—W21—0.5OEM-E14-14———
7IGN5—W22—0.5OEM-E14-15———
8IGN6—W23—0.5OEM-E14-16———
95V Auxiliary Sensor Supply————————
10GND Battery Negative—W7—0.85SP-GND-1———
11GND Battery Negative—W8—0.85SP-GND-1———
128V Engine Sensor Supply————————
138V Auxiliary Sensor and CAN Supply————————
14AV1—W34—0.5OEM-E13-10———
15Analog Voltage Input 2—W35—0.5OEM-E13-13———
16Analog Voltage Input 3—W36—0.5OEM-E13-21———
17Analog Voltage Input 4—W37—0.5OEM-E13-20———
18AUX1—W32—0.5OEM-E11-19———
19INJ1—W24—0.5OEM-E13-5———
20INJ2—W25—0.5OEM-E13-6———
21INJ3—W26—0.5OEM-E14-1———
22INJ4—W27—0.5OEM-E14-2———
23AUX3—W40—0.5OEM-E15-10———
24AUX4—W41—0.5OEM-E15-5———
25Analog Voltage Input 5—W38—0.5OEM-E13-9———
26VBAT Battery Positive—W4—0.85SP-14V-1———
27INJ5—W28—0.5OEM-E14-3———
28INJ6—W29—0.5OEM-E14-4———
29INJ7—W30—0.5OEM-E14-5———
30INJ8—W31—0.5OEM-E14-6———
31AUX5—W42—0.5OEM-E11-7———
32AUX6—W43—0.5OEM-E11-8———
33AUX7—W44—0.5OEM-E13-3———
34AUX8—W45—0.5OEM-E13-4———

M800-B

Mating face
M800-B-1 · Crank Reference Timing Input1M800-B-2 · Cam Sync Timing Input2M800-B-3 · Analog Temperature Input 13M800-B-4 · Analog Temperature Input 24M800-B-5 · Analog Temperature Input 35M800-B-6 · Analog Temperature Input 46M800-B-7 · Analog Temperature Input 57M800-B-8 · Digital Input 18M800-B-9 · Digital Input 29M800-B-10 · Digital Input 310M800-B-11 · Digital Input 411M800-B-12 · Lambda2 Sense Voltage12M800-B-13 · Lambda2 Pump Current13M800-B-14 · 0V Comms Reference14M800-B-15 · 0V Auxiliary Sensor Supply15M800-B-16 · 0V Engine Sensor Supply16M800-B-17 · RS232 Transmit Data17M800-B-18 · RS232 Receive Data18M800-B-19 · Analog Temperature Input 619M800-B-20 · Analog Voltage Input 620M800-B-21 · AV721M800-B-22 · AV822M800-B-23 · CAN Bus High23M800-B-24 · CAN Bus Low24M800-B-25 · Lambda1 Sense Voltage25M800-B-26 · Lambda1 Pump Current26
Wire side
M800-B-1 · Crank Reference Timing Input1M800-B-2 · Cam Sync Timing Input2M800-B-3 · Analog Temperature Input 13M800-B-4 · Analog Temperature Input 24M800-B-5 · Analog Temperature Input 35M800-B-6 · Analog Temperature Input 46M800-B-7 · Analog Temperature Input 57M800-B-8 · Digital Input 18M800-B-9 · Digital Input 29M800-B-10 · Digital Input 310M800-B-11 · Digital Input 411M800-B-12 · Lambda2 Sense Voltage12M800-B-13 · Lambda2 Pump Current13M800-B-14 · 0V Comms Reference14M800-B-15 · 0V Auxiliary Sensor Supply15M800-B-16 · 0V Engine Sensor Supply16M800-B-17 · RS232 Transmit Data17M800-B-18 · RS232 Receive Data18M800-B-19 · Analog Temperature Input 619M800-B-20 · Analog Voltage Input 620M800-B-21 · AV721M800-B-22 · AV822M800-B-23 · CAN Bus High23M800-B-24 · CAN Bus Low24M800-B-25 · Lambda1 Sense Voltage25M800-B-26 · Lambda1 Pump Current26
CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Crank Reference Timing Input—W15—0.5OEM-E14-23———
2Cam Sync Timing Input—W17—0.5OEM-E14-10———
3Analog Temperature Input 1—W39—0.5OEM-E13-14———
4Analog Temperature Input 2—W49—0.5OEM-E13-22———
5Analog Temperature Input 3————————
6Analog Temperature Input 4————————
7Analog Temperature Input 5————————
8Digital Input 1—W50—0.5OEM-E14-27———
9Digital Input 2—W51—0.5OEM-E14-28———
10Digital Input 3—W52—0.5OEM-E11-17———
11Digital Input 4————————
12Lambda2 Sense Voltage————————
13Lambda2 Pump Current————————
140V Comms Reference—W11—0.5SP-0V-1———
150V Auxiliary Sensor Supply—W12—0.5SP-0V-1———
160V Engine Sensor Supply—W13—0.5SP-0V-1———
17RS232 Transmit Data————————
18RS232 Receive Data————————
19Analog Temperature Input 6————————
20Analog Voltage Input 6—W46—0.5OEM-E11-18———
21AV7—W47—0.5OEM-E11-27———
22AV8—W48—0.5OEM-E13-11———
23CAN Bus High————————
24CAN Bus Low————————
25Lambda1 Sense Voltage————————
26Lambda1 Pump Current————————

OEM-E11

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
17Starter signal (STA)—W52—0.5M800-B-10———
18O2 sensor signal (bank unconfirmed)—W46—0.5M800-B-20———
19VVT oil-control valve RH (OCR+)—W32—0.5M800-A-18———
27O2 sensor signal (bank unconfirmed)—W47—0.5M800-B-21———
28VVT oil-control valve RH (OCR−)————————
5Diagnostic test (TC)————————
7O2 sensor heater (bank unconfirmed)—W42—0.5M800-A-31———
8O2 sensor heater (bank unconfirmed)—W43—0.5M800-A-32———

OEM-E12

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
12Throttle magnetic clutch + (CL+)————————

OEM-E13

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
10MAF signal (VG)—W34—0.5M800-A-14———
11O2 sensor signal (bank unconfirmed)—W48—0.5M800-B-22———
12O2 sensor signal (bank unconfirmed)————————
13Throttle position sensor 1 (VTA)—W35—0.5M800-A-15———
14Engine coolant temp (THW)—W39—0.5M800-B-3———
15VVT position sensor RH (VVR+)————————
16VVT position sensor LH (VVL+)————————
17ECU ground (E1)—W5—0.85SP-GND-1———
18Sensor ground (E2)—W9—0.5SP-0V-1———
19MAF ground (EVG)—W10—0.5SP-0V-1———
2+5V sensor reference (VC)—W14—0.5M800-A-2———
20Throttle position sensor 2 (VTA2)—W37—0.5M800-A-17———
21Accelerator pedal position 1 (VPA)—W36—0.5M800-A-16———
22Intake air temp (THA)—W49—0.5M800-B-4———
23VVT position sensor RH (VVR−)————————
24VVT position sensor LH (VVL−)————————
3O2 sensor heater (bank unconfirmed)—W44—0.5M800-A-33———
4O2 sensor heater (bank unconfirmed)—W45—0.5M800-A-34———
5Injector 1 (cyl 1)—W24—0.5M800-A-19———
6Injector 2 (cyl 2)—W25—0.5M800-A-20———
8Throttle magnetic clutch − (CL−)————————
9Accelerator pedal position 2 (VPA2)—W38—0.5M800-A-25———

OEM-E14

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Injector 3 (cyl 3)—W26—0.5M800-A-21———
10Camshaft position sensor (G2)—W17—0.5M800-B-2———
11Ignition coil 1 (IGT1)—W18—0.5M800-A-3———
12Ignition coil 2 (IGT2)—W19—0.5M800-A-4———
13Ignition coil 3 (IGT3)—W20—0.5M800-A-5———
14Ignition coil 4 (IGT4)—W21—0.5M800-A-6———
15Ignition coil 5 (IGT5)—W22—0.5M800-A-7———
16Ignition coil 6 (IGT6)—W23—0.5M800-A-8———
17Knock sensor RH (KNKR)————————
18Knock sensor LH (KNKL)————————
19VVT oil-control valve LH (OCV−)————————
2Injector 4 (cyl 4)—W27—0.5M800-A-22———
20VVT oil-control valve LH (OCV+)—W33—0.5M800-A-1———
21Power/injector ground (E01)—W6—0.85SP-GND-1———
22Crank position sensor (NE−)—W16—0.5SP-0V-1———
23Crank position sensor (NE+)—W15—0.5M800-B-1———
25Ignition coil 7 (IGT7)————————
26Ignition coil 8 (IGT8)————————
27Ignition confirmation 1 (IGF1)—W50—0.5M800-B-8———
28Ignition confirmation 2 (IGF2)—W51—0.5M800-B-9———
29ACIS induction VSV————————
3Injector 5 (cyl 5)—W28—0.5M800-A-27———
4Injector 6 (cyl 6)—W29—0.5M800-A-28———
5Injector 7 (cyl 7)—W30—0.5M800-A-29———
6Injector 8 (cyl 8)—W31—0.5M800-A-30———
7Throttle motor − (M−)————————
8Throttle motor + (M+)————————

OEM-E15

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Battery constant (+12V)————————
10EFI main relay control (MREL)—W40—0.5M800-A-23———
11OBD-II / DLC3 data (SIL)————————
16ECM power (EFI relay +B)—W1—0.85SP-14V-1———
5Fuel pump relay control (FC)—W41—0.5M800-A-24———
6Check engine light (W)————————
7ECM power feed (+BM)—W2—0.85SP-14V-1———
8ECM power (EFI relay +B1)—W3—0.85SP-14V-1———
9Ignition switch (+12V)————————

SP-0V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W9—0.5OEM-E13-18———
1——W10—0.5OEM-E13-19———
1——W11—0.5M800-B-14———
1——W12—0.5M800-B-15———
1——W13—0.5M800-B-16———
1——W16—0.5OEM-E14-22———

SP-14V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W1—0.85OEM-E15-16———
1——W2—0.85OEM-E15-7———
1——W3—0.85OEM-E15-8———
1——W4—0.85M800-A-26———

SP-GND

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W5—0.85OEM-E13-17———
1——W6—0.85OEM-E14-21———
1——W7—0.85M800-A-10———
1——W8—0.85M800-A-11———

Pin map

OEM pointOEM functionOEM familyTarget pointTarget functionTarget familyWire colourEvidence
OEM-E11-17Starter signal (STA)digital_inM800-B-10Digital Input 3digital_incorroborated
OEM-E11-18O2 sensor signal (bank unconfirmed)lambda_nb_inM800-B-20Analog Voltage Input 6analog_incorroborated
OEM-E11-19VVT oil-control valve RH (OCR+)low_side_outM800-A-18AUX1switch_outcorroborated
OEM-E11-27O2 sensor signal (bank unconfirmed)lambda_nb_inM800-B-21AV7analog_incorroborated
OEM-E11-28VVT oil-control valve RH (OCR−)low_side_out———corroborated
OEM-E11-5Diagnostic test (TC)serial———corroborated
OEM-E11-7O2 sensor heater (bank unconfirmed)low_side_outM800-A-31AUX5switch_outcorroborated
OEM-E11-8O2 sensor heater (bank unconfirmed)low_side_outM800-A-32AUX6switch_outcorroborated
OEM-E12-12Throttle magnetic clutch + (CL+)low_side_out———corroborated
OEM-E13-10MAF signal (VG)analog_inM800-A-14AV1analog_incorroborated
OEM-E13-11O2 sensor signal (bank unconfirmed)lambda_nb_inM800-B-22AV8analog_incorroborated
OEM-E13-12O2 sensor signal (bank unconfirmed)lambda_nb_in———corroborated
OEM-E13-13Throttle position sensor 1 (VTA)analog_inM800-A-15Analog Voltage Input 2analog_incorroborated
OEM-E13-14Engine coolant temp (THW)temp_inM800-B-3Analog Temperature Input 1temp_incorroborated
OEM-E13-15VVT position sensor RH (VVR+)trigger_in———corroborated
OEM-E13-16VVT position sensor LH (VVL+)trigger_in———corroborated
OEM-E13-17ECU ground (E1)groundM800-A-10 + M800-A-11GND Battery Negative + GND Battery Negativegroundcorroborated
OEM-E13-18Sensor ground (E2)sensor_groundM800-B-14 + M800-B-15 + M800-B-160V Comms Reference + 0V Auxiliary Sensor Supply + 0V Engine Sensor Supplysensor_groundcorroborated
OEM-E13-19MAF ground (EVG)sensor_groundM800-B-14 + M800-B-15 + M800-B-160V Comms Reference + 0V Auxiliary Sensor Supply + 0V Engine Sensor Supplysensor_groundcorroborated
OEM-E13-2+5V sensor reference (VC)vrefM800-A-25V Engine Sensor Supplyvrefcorroborated
OEM-E13-20Throttle position sensor 2 (VTA2)analog_inM800-A-17Analog Voltage Input 4analog_incorroborated
OEM-E13-21Accelerator pedal position 1 (VPA)analog_inM800-A-16Analog Voltage Input 3analog_incorroborated
OEM-E13-22Intake air temp (THA)temp_inM800-B-4Analog Temperature Input 2temp_incorroborated
OEM-E13-23VVT position sensor RH (VVR−)trigger_in———corroborated
OEM-E13-24VVT position sensor LH (VVL−)trigger_in———corroborated
OEM-E13-3O2 sensor heater (bank unconfirmed)low_side_outM800-A-33AUX7switch_outcorroborated
OEM-E13-4O2 sensor heater (bank unconfirmed)low_side_outM800-A-34AUX8switch_outcorroborated
OEM-E13-5Injector 1 (cyl 1)injector_outM800-A-19INJ1injector_outcorroborated
OEM-E13-6Injector 2 (cyl 2)injector_outM800-A-20INJ2injector_outcorroborated
OEM-E13-8Throttle magnetic clutch − (CL−)low_side_out———corroborated
OEM-E13-9Accelerator pedal position 2 (VPA2)analog_inM800-A-25Analog Voltage Input 5analog_incorroborated
OEM-E14-1Injector 3 (cyl 3)injector_outM800-A-21INJ3injector_outcorroborated
OEM-E14-10Camshaft position sensor (G2)trigger_inM800-B-2Cam Sync Timing Inputtrigger_incorroborated
OEM-E14-11Ignition coil 1 (IGT1)ignition_outM800-A-3IGN1ignition_outcorroborated
OEM-E14-12Ignition coil 2 (IGT2)ignition_outM800-A-4IGN2ignition_outcorroborated
OEM-E14-13Ignition coil 3 (IGT3)ignition_outM800-A-5IGN3ignition_outcorroborated
OEM-E14-14Ignition coil 4 (IGT4)ignition_outM800-A-6IGN4ignition_outcorroborated
OEM-E14-15Ignition coil 5 (IGT5)ignition_outM800-A-7IGN5ignition_outcorroborated
OEM-E14-16Ignition coil 6 (IGT6)ignition_outM800-A-8IGN6ignition_outcorroborated
OEM-E14-17Knock sensor RH (KNKR)knock_in———corroborated
OEM-E14-18Knock sensor LH (KNKL)knock_in———corroborated
OEM-E14-19VVT oil-control valve LH (OCV−)low_side_out———corroborated
OEM-E14-2Injector 4 (cyl 4)injector_outM800-A-22INJ4injector_outcorroborated
OEM-E14-20VVT oil-control valve LH (OCV+)low_side_outM800-A-1AUX2switch_outcorroborated
OEM-E14-21Power/injector ground (E01)groundM800-A-10 + M800-A-11GND Battery Negative + GND Battery Negativegroundcorroborated
OEM-E14-22Crank position sensor (NE−)trigger_inM800-B-14 + M800-B-15 + M800-B-160V Comms Reference + 0V Auxiliary Sensor Supply + 0V Engine Sensor Supplysensor_groundcorroborated
OEM-E14-23Crank position sensor (NE+)trigger_inM800-B-1Crank Reference Timing Inputtrigger_incorroborated
OEM-E14-25Ignition coil 7 (IGT7)ignition_out———corroborated
OEM-E14-26Ignition coil 8 (IGT8)ignition_out———corroborated
OEM-E14-27Ignition confirmation 1 (IGF1)digital_inM800-B-8Digital Input 1digital_incorroborated
OEM-E14-28Ignition confirmation 2 (IGF2)digital_inM800-B-9Digital Input 2digital_incorroborated
OEM-E14-29ACIS induction VSVlow_side_out———corroborated
OEM-E14-3Injector 5 (cyl 5)injector_outM800-A-27INJ5injector_outcorroborated
OEM-E14-4Injector 6 (cyl 6)injector_outM800-A-28INJ6injector_outcorroborated
OEM-E14-5Injector 7 (cyl 7)injector_outM800-A-29INJ7injector_outcorroborated
OEM-E14-6Injector 8 (cyl 8)injector_outM800-A-30INJ8injector_outcorroborated
OEM-E14-7Throttle motor − (M−)hbridge_out———corroborated
OEM-E14-8Throttle motor + (M+)hbridge_out———corroborated
OEM-E15-1Battery constant (+12V)power_in———corroborated
OEM-E15-10EFI main relay control (MREL)low_side_outM800-A-23AUX3switch_outcorroborated
OEM-E15-11OBD-II / DLC3 data (SIL)serial———corroborated
OEM-E15-16ECM power (EFI relay +B)power_inM800-A-26VBAT Battery Positivepower_incorroborated
OEM-E15-5Fuel pump relay control (FC)low_side_outM800-A-24AUX4switch_outcorroborated
OEM-E15-6Check engine light (W)low_side_out———corroborated
OEM-E15-7ECM power feed (+BM)power_inM800-A-26VBAT Battery Positivepower_incorroborated
OEM-E15-8ECM power (EFI relay +B1)power_inM800-A-26VBAT Battery Positivepower_incorroborated
OEM-E15-9Ignition switch (+12V)digital_in———corroborated

Cut list

WireFromToGauge (mm²)ColourLengthSignalIdent
W1OEM-E15-16SP-14V-10.85no routeECM power (EFI relay +B)—
W2OEM-E15-7SP-14V-10.85no routeECM power feed (+BM)—
W3OEM-E15-8SP-14V-10.85no routeECM power (EFI relay +B1)—
W4SP-14V-1M800-A-260.85no routeVBAT Battery Positive—
W5OEM-E13-17SP-GND-10.85no routeECU ground (E1)—
W6OEM-E14-21SP-GND-10.85no routePower/injector ground (E01)—
W7SP-GND-1M800-A-100.85no routeGND Battery Negative—
W8SP-GND-1M800-A-110.85no routeGND Battery Negative—
W9OEM-E13-18SP-0V-10.5no routeSensor ground (E2)—
W10OEM-E13-19SP-0V-10.5no routeMAF ground (EVG)—
W11SP-0V-1M800-B-140.5no route0V Comms Reference—
W12SP-0V-1M800-B-150.5no route0V Auxiliary Sensor Supply—
W13SP-0V-1M800-B-160.5no route0V Engine Sensor Supply—
W14OEM-E13-2M800-A-20.5no route+5V sensor reference (VC)—
W15OEM-E14-23M800-B-10.5no routeCrank position sensor (NE+)—
W16OEM-E14-22SP-0V-10.5no routeCrank position sensor (NE−)—
W17OEM-E14-10M800-B-20.5no routeCamshaft position sensor (G2)—
W18OEM-E14-11M800-A-30.5no routeIgnition coil 1 (IGT1)—
W19OEM-E14-12M800-A-40.5no routeIgnition coil 2 (IGT2)—
W20OEM-E14-13M800-A-50.5no routeIgnition coil 3 (IGT3)—
W21OEM-E14-14M800-A-60.5no routeIgnition coil 4 (IGT4)—
W22OEM-E14-15M800-A-70.5no routeIgnition coil 5 (IGT5)—
W23OEM-E14-16M800-A-80.5no routeIgnition coil 6 (IGT6)—
W24OEM-E13-5M800-A-190.5no routeInjector 1 (cyl 1)—
W25OEM-E13-6M800-A-200.5no routeInjector 2 (cyl 2)—
W26OEM-E14-1M800-A-210.5no routeInjector 3 (cyl 3)—
W27OEM-E14-2M800-A-220.5no routeInjector 4 (cyl 4)—
W28OEM-E14-3M800-A-270.5no routeInjector 5 (cyl 5)—
W29OEM-E14-4M800-A-280.5no routeInjector 6 (cyl 6)—
W30OEM-E14-5M800-A-290.5no routeInjector 7 (cyl 7)—
W31OEM-E14-6M800-A-300.5no routeInjector 8 (cyl 8)—
W32OEM-E11-19M800-A-180.5no routeVVT oil-control valve RH (OCR+)—
W33OEM-E14-20M800-A-10.5no routeVVT oil-control valve LH (OCV+)—
W34OEM-E13-10M800-A-140.5no routeMAF signal (VG)—
W35OEM-E13-13M800-A-150.5no routeThrottle position sensor 1 (VTA)—
W36OEM-E13-21M800-A-160.5no routeAccelerator pedal position 1 (VPA)—
W37OEM-E13-20M800-A-170.5no routeThrottle position sensor 2 (VTA2)—
W38OEM-E13-9M800-A-250.5no routeAccelerator pedal position 2 (VPA2)—
W39OEM-E13-14M800-B-30.5no routeEngine coolant temp (THW)—
W40OEM-E15-10M800-A-230.5no routeEFI main relay control (MREL)—
W41OEM-E15-5M800-A-240.5no routeFuel pump relay control (FC)—
W42OEM-E11-7M800-A-310.5no routeO2 sensor heater (bank unconfirmed)—
W43OEM-E11-8M800-A-320.5no routeO2 sensor heater (bank unconfirmed)—
W44OEM-E13-3M800-A-330.5no routeO2 sensor heater (bank unconfirmed)—
W45OEM-E13-4M800-A-340.5no routeO2 sensor heater (bank unconfirmed)—
W46OEM-E11-18M800-B-200.5no routeO2 sensor signal (bank unconfirmed)—
W47OEM-E11-27M800-B-210.5no routeO2 sensor signal (bank unconfirmed)—
W48OEM-E13-11M800-B-220.5no routeO2 sensor signal (bank unconfirmed)—
W49OEM-E13-22M800-B-40.5no routeIntake air temp (THA)—
W50OEM-E14-27M800-B-80.5no routeIgnition confirmation 1 (IGF1)—
W51OEM-E14-28M800-B-90.5no routeIgnition confirmation 2 (IGF2)—
W52OEM-E11-17M800-B-100.5no routeStarter signal (STA)—

Bill of materials

CategoryPart numberManufacturerDescriptionQtyUnit
connector3-1437290-7TESuperseal 1.0 26-way plug1.000ea
connector4-1437290-0TESuperseal 1.0 34-way plug, Key 11.000ea
terminal3-1447221-4TESuperseal 1.0 socket terminal, 20 AWG (0.5 sq mm)44.000ea

ECU setup sheet

RoleEngine refEngine signalSensorECU pointECU functionECU classSetup flag
No configured channels.

Findings

Open (19)

SeverityCodeSubjectMessage
errorREQUIRED_UNMAPPEDOEM-E14-17Required OEM function "Knock sensor RH (KNKR)" (knock_in) is not connected to the new ECU.
errorREQUIRED_UNMAPPEDOEM-E14-18Required OEM function "Knock sensor LH (KNKL)" (knock_in) is not connected to the new ECU.
errorREQUIRED_UNMAPPEDOEM-E14-25Required OEM function "Ignition coil 7 (IGT7)" (ignition_out) is not connected to the new ECU.
errorREQUIRED_UNMAPPEDOEM-E14-26Required OEM function "Ignition coil 8 (IGT8)" (ignition_out) is not connected to the new ECU.
errorREQUIRED_UNMAPPEDOEM-E14-7Required OEM function "Throttle motor − (M−)" (hbridge_out) is not connected to the new ECU.
errorREQUIRED_UNMAPPEDOEM-E14-8Required OEM function "Throttle motor + (M+)" (hbridge_out) is not connected to the new ECU.
errorREQUIRED_UNMAPPEDOEM-E15-9Required OEM function "Ignition switch (+12V)" (digital_in) is not connected to the new ECU.
warnLOAD_UNKNOWNM800-A-23M800-A-23 "AUX3" drives OEM-E15-10 EFI main relay control (MREL) (load 0.2 A) but its current rating is unknown. Check the ECU manual.
warnLOAD_UNKNOWNM800-A-24M800-A-24 "AUX4" drives OEM-E15-5 Fuel pump relay control (FC) (load 0.2 A) but its current rating is unknown. Check the ECU manual.
infoNET_FAMILYOEM-E11-19 ↔ M800-A-18OEM-E11-19 "VVT oil-control valve RH (OCR+)" [low_side_out] is wired to M800-A-18 "AUX1" [switch_out]. Configure this output as low side.
infoNET_FAMILYOEM-E11-7 ↔ M800-A-31OEM-E11-7 "O2 sensor heater (bank unconfirmed)" [low_side_out] is wired to M800-A-31 "AUX5" [switch_out]. Configure this output as low side.
infoNET_FAMILYOEM-E11-8 ↔ M800-A-32OEM-E11-8 "O2 sensor heater (bank unconfirmed)" [low_side_out] is wired to M800-A-32 "AUX6" [switch_out]. Configure this output as low side.
infoNET_FAMILYOEM-E13-18 ↔ OEM-E14-22OEM-E13-18 "Sensor ground (E2)" [sensor_ground] is wired to OEM-E14-22 "Crank position sensor (NE−)" [trigger_in]. Trigger return tied to sensor/trigger ground: correct for single-ended trigger inputs.
infoNET_FAMILYOEM-E13-3 ↔ M800-A-33OEM-E13-3 "O2 sensor heater (bank unconfirmed)" [low_side_out] is wired to M800-A-33 "AUX7" [switch_out]. Configure this output as low side.
infoNET_FAMILYOEM-E13-4 ↔ M800-A-34OEM-E13-4 "O2 sensor heater (bank unconfirmed)" [low_side_out] is wired to M800-A-34 "AUX8" [switch_out]. Configure this output as low side.
infoNET_FAMILYOEM-E14-20 ↔ M800-A-1OEM-E14-20 "VVT oil-control valve LH (OCV+)" [low_side_out] is wired to M800-A-1 "AUX2" [switch_out]. Configure this output as low side.
infoNET_FAMILYOEM-E15-10 ↔ M800-A-23OEM-E15-10 "EFI main relay control (MREL)" [low_side_out] is wired to M800-A-23 "AUX3" [switch_out]. Configure this output as low side.
infoNET_FAMILYOEM-E15-5 ↔ M800-A-24OEM-E15-5 "Fuel pump relay control (FC)" [low_side_out] is wired to M800-A-24 "AUX4" [switch_out]. Configure this output as low side.
infoUNMAPPEDOEM13 optional OEM pins are not mapped: OEM-E11-28 VVT oil-control valve RH (OCR−); OEM-E11-5 Diagnostic test (TC); OEM-E12-12 Throttle magnetic clutch + (CL+); OEM-E13-12 O2 sensor signal (bank unconfirmed); OEM-E13-15 VVT position sensor RH (VVR+); OEM-E13-16 VVT position sensor LH (VVL+); OEM-E13-23 VVT position sensor RH (VVR−); OEM-E13-24 VVT position sensor LH (VVL−); OEM-E13-8 Throttle magnetic clutch − (CL−); OEM-E14-19 VVT oil-control valve LH (OCV−); OEM-E14-29 ACIS induction VSV; OEM-E15-11 OBD-II / DLC3 data (SIL); OEM-E15-6 Check engine light (W)

Accepted (1)

CodeSubjectReasonBy
REQUIRED_UNMAPPEDOEM-E15-1Battery-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-E14 18: Knock sensor LH (KNKL): no free knock input on MoTeC M800 - OEM-E14 17: Knock sensor RH (KNKR): no free knock input on MoTeC M800 - OEM-E14 25: Ignition coil 7 (IGT7): no free ignition output on MoTeC M800 - OEM-E14 26: Ignition coil 8 (IGT8): no free ignition output on MoTeC M800 - OEM-E14 7: Throttle motor − (M−): needs a paired H-bridge on MoTeC M800 - OEM-E14 8: Throttle motor + (M+): needs a paired H-bridge on MoTeC M800 - OEM-E15 9: Ignition switch (+12V): key-on 12 V sense — optional in a swap (the main relay is energized from keyed 12 V, not from this pin); MoTeC M800 has no dedicated key-on input Not wired: - OEM-E15 1: Battery constant (+12V): MoTeC M800 has no battery-constant input; not needed - OEM-E13 16: VVT position sensor LH (VVL+): no free cam_hall/cam_vr/frequency_in input on MoTeC M800 - OEM-E13 24: VVT position sensor LH (VVL−): no free cam_hall/cam_vr/frequency_in input on MoTeC M800 - OEM-E13 15: VVT position sensor RH (VVR+): no free cam_hall/cam_vr/frequency_in input on MoTeC M800 - OEM-E13 23: VVT position sensor RH (VVR−): no free cam_hall/cam_vr/frequency_in input on MoTeC M800 - OEM-E11 28: VVT oil-control valve RH (OCR−): no free low_side/relay_control/heater_low_side/ls_hs/injector on MoTeC M800 - OEM-E12 12: Throttle magnetic clutch + (CL+): no free low_side/relay_control/heater_low_side/ls_hs/injector on MoTeC M800 - OEM-E13 8: Throttle magnetic clutch − (CL−): no free low_side/relay_control/heater_low_side/ls_hs/injector on MoTeC M800 - OEM-E14 19: VVT oil-control valve LH (OCV−): no free low_side/relay_control/heater_low_side/ls_hs/injector on MoTeC M800 - OEM-E14 29: ACIS induction VSV: no free low_side/relay_control/heater_low_side/ls_hs/injector on MoTeC M800 - OEM-E15 6: Check engine light (W): no free low_side/relay_control/heater_low_side/ls_hs/injector on MoTeC M800 - OEM-E13 12: O2 sensor signal (bank unconfirmed): no free o2_narrowband/analog_0_5 on MoTeC M800 - OEM-E15 11: OBD-II / DLC3 data (SIL): no free k_line on MoTeC M800 - OEM-E11 5: Diagnostic test (TC): no free k_line on MoTeC M800

Sources

ReliabilityKindTitleURLArchiveCapturedSHA-256
4vendor_docMoTeC M400/M600/M800/M880 Manual — Appendix L: Pin list by Functionhttps://starracecars.com/wp-content/uploads/resources/M400_M600_M800_M880_Manual_A5.pdfarchive2026-10-05b69bb8ffb674
4vendor_docMoTeC M800 OEM WRX56 Installationhttps://motec.com.auarchive2026-10-052ca4be92bb65
4vendor_docToyota 1UZ-FE (VVT-i) engine manual M1UZhttp://www.epicmarine.com/docs/M1UZrm.pdf———
3community_copy1998 Lexus LS400 ECM terminal voltage chart (RM717U translation)https://www.renrendoc.com/p-59096353.html———