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Lexus LS400 1989-97 (1UZ-FE non-VVTi) → ECUMASTER EMU PRO 16 (auto)

Lexus LS400 1989-97 (1UZ-FE non-VVTi) — ECUMASTER — EMU PRO 16
⚠ 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 job65 wires · 11 connectors · 5 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-A-12SP-14V-10.85☐☐☐☐☐☐☐
W2OEM-A-13SP-14V-10.85☐☐☐☐☐☐☐
W3SP-14V-1EMUPRO16-B-140.85☐☐☐☐☐☐☐
W4SP-14V-1EMUPRO16-B-80.85☐☐☐☐☐☐☐
W5OEM-A-22SP-GND-10.85☐☐☐☐☐☐☐
W6OEM-D-13SP-GND-10.85☐☐☐☐☐☐☐
W7OEM-D-26SP-GND-10.85☐☐☐☐☐☐☐
W8SP-GND-1EMUPRO16-A-110.85☐☐☐☐☐☐☐
W9SP-GND-1EMUPRO16-A-170.85☐☐☐☐☐☐☐
W10SP-GND-1EMUPRO16-A-190.85☐☐☐☐☐☐☐
W11SP-GND-1EMUPRO16-B-190.85☐☐☐☐☐☐☐
W12SP-GND-1EMUPRO16-C-300.85☐☐☐☐☐☐☐
W13SP-GND-1EMUPRO16-D-180.85☐☐☐☐☐☐☐
W14OEM-A-18SP-0V-10.5☐☐☐☐☐☐☐
W15OEM-C-15SP-0V-10.5☐☐☐☐☐☐☐
W16OEM-C-16SP-0V-10.5☐☐☐☐☐☐☐
W17SP-0V-1EMUPRO16-A-200.5☐☐☐☐☐☐☐
W18SP-0V-1EMUPRO16-B-90.5☐☐☐☐☐☐☐
W19SP-0V-1EMUPRO16-C-290.5☐☐☐☐☐☐☐
W20SP-0V-1EMUPRO16-D-170.5☐☐☐☐☐☐☐
W21OEM-A-11EMUPRO16-A-120.5☐☐☐☐☐☐☐
W22OEM-C-8EMUPRO16-A-210.5☐☐☐☐☐☐☐
W23OEM-C-3EMUPRO16-B-160.5☐☐☐☐☐☐☐
W24OEM-C-11EMUPRO16-B-170.5☐☐☐☐☐☐☐
W25OEM-C-5EMUPRO16-A-300.5☐☐☐☐☐☐☐
W26OEM-C-13EMUPRO16-A-290.5☐☐☐☐☐☐☐
W27OEM-D-12EMUPRO16-A-20.5☐☐☐☐☐☐☐
W28OEM-D-11EMUPRO16-A-30.5☐☐☐☐☐☐☐
W29OEM-D-24EMUPRO16-A-40.5☐☐☐☐☐☐☐
W30OEM-D-25EMUPRO16-A-50.5☐☐☐☐☐☐☐
W31OEM-A-1EMUPRO16-B-150.5☐☐☐☐☐☐☐
W32OEM-A-4EMUPRO16-C-310.5☐☐☐☐☐☐☐
W33OEM-A-5EMUPRO16-C-180.5☐☐☐☐☐☐☐
W34OEM-B-4EMUPRO16-B-10.5☐☐☐☐☐☐☐
W35OEM-B-6EMUPRO16-B-20.5☐☐☐☐☐☐☐
W36OEM-B-7EMUPRO16-B-30.5☐☐☐☐☐☐☐
W37OEM-D-19EMUPRO16-B-40.5☐☐☐☐☐☐☐
W38OEM-D-20EMUPRO16-B-50.5☐☐☐☐☐☐☐
W39OEM-D-17EMUPRO16-B-60.5☐☐☐☐☐☐☐
W40OEM-D-8EMUPRO16-B-70.5☐☐☐☐☐☐☐
W41OEM-D-7EMUPRO16-B-130.5☐☐☐☐☐☐☐
W42OEM-D-6EMUPRO16-A-250.5☐☐☐☐☐☐☐
W43OEM-D-5EMUPRO16-C-10.5☐☐☐☐☐☐☐
W44OEM-B-5EMUPRO16-C-20.5☐☐☐☐☐☐☐
W45OEM-B-8EMUPRO16-C-30.5☐☐☐☐☐☐☐
W46OEM-D-21EMUPRO16-D-130.5☐☐☐☐☐☐☐
W47OEM-D-22EMUPRO16-D-190.5☐☐☐☐☐☐☐
W48OEM-D-4EMUPRO16-D-260.5☐☐☐☐☐☐☐
W49OEM-A-17EMUPRO16-C-320.5☐☐☐☐☐☐☐
W50OEM-A-6EMUPRO16-C-110.5☐☐☐☐☐☐☐
W51OEM-B-11EMUPRO16-C-330.5☐☐☐☐☐☐☐
W52OEM-B-24EMUPRO16-C-190.5☐☐☐☐☐☐☐
W53OEM-A-16EMUPRO16-C-340.5☐☐☐☐☐☐☐
W54OEM-A-7EMUPRO16-C-120.5☐☐☐☐☐☐☐
W55OEM-C-2EMUPRO16-A-130.5☐☐☐☐☐☐☐
W56OEM-C-10EMUPRO16-A-220.5☐☐☐☐☐☐☐
W57OEM-A-19EMUPRO16-A-140.5☐☐☐☐☐☐☐
W58OEM-A-9EMUPRO16-A-240.5☐☐☐☐☐☐☐
W59OEM-A-20EMUPRO16-A-160.5☐☐☐☐☐☐☐
W60OEM-A-14EMUPRO16-A-230.5☐☐☐☐☐☐☐
W61OEM-A-2EMUPRO16-A-150.5☐☐☐☐☐☐☐
W62OEM-B-19EMUPRO16-D-110.5☐☐☐☐☐☐☐
W63OEM-B-20EMUPRO16-D-120.5☐☐☐☐☐☐☐
W64OEM-B-23EMUPRO16-D-210.5☐☐☐☐☐☐☐
W65OEM-C-1EMUPRO16-C-200.5☐☐☐☐☐☐☐

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
1EMUPRO16-A-12EMUPRO16-A-11open (OL)5 V sensor reference must not touch power ground
2EMUPRO16-A-12EMUPRO16-A-20open (OL)5 V sensor reference must not touch sensor ground
3EMUPRO16-B-14EMUPRO16-A-11open (OL)+12 V supply must not touch power ground
4EMUPRO16-B-14EMUPRO16-A-20open (OL)+12 V supply must not touch sensor ground
5EMUPRO16-A-12EMUPRO16-B-14open (OL)5 V sensor reference must not touch +12 V supply

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

Revisions

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Schematic

EMUPRO16-AEMUPRO16-BEMUPRO16-CEMUPRO16-DOEM-AOEM-BOEM-COEM-DSP-0VSP-14VSP-GND

Connectors

EMUPRO16-A

Mating face
EMUPRO16-A-1 · Ignition 81EMUPRO16-A-2 · Injector 12EMUPRO16-A-3 · Injector 23EMUPRO16-A-4 · Injector 34EMUPRO16-A-5 · Injector 45EMUPRO16-A-6 · Injector 56EMUPRO16-A-7 · Injector 67EMUPRO16-A-8 · Injector 78EMUPRO16-A-9 · Injector 89EMUPRO16-A-10 · Ignition 710EMUPRO16-A-11 · Power GND11EMUPRO16-A-12 · +5V source A12EMUPRO16-A-13 · Digital 213EMUPRO16-A-14 · Digital 414EMUPRO16-A-15 · Digital 815EMUPRO16-A-16 · Digital 6 (turbo)16EMUPRO16-A-17 · Power GND17EMUPRO16-A-18 · Ignition 618EMUPRO16-A-19 · Power GND19EMUPRO16-A-20 · Digital GND20EMUPRO16-A-21 · Digital 1 (crank)21EMUPRO16-A-22 · Digital 322EMUPRO16-A-23 · Digital 723EMUPRO16-A-24 · Digital 5 (turbo)24EMUPRO16-A-25 · Auxiliary 925EMUPRO16-A-26 · Ignition 526EMUPRO16-A-27 · Ignition 427EMUPRO16-A-28 · Ignition 328EMUPRO16-A-29 · Ignition 229EMUPRO16-A-30 · Ignition 130EMUPRO16-A-31 · CAN 1 high (PC comm)31EMUPRO16-A-32 · CAN 1 low (PC comm)32EMUPRO16-A-33 · CAN 2 high33EMUPRO16-A-34 · CAN 2 low34
Wire side
EMUPRO16-A-1 · Ignition 81EMUPRO16-A-2 · Injector 12EMUPRO16-A-3 · Injector 23EMUPRO16-A-4 · Injector 34EMUPRO16-A-5 · Injector 45EMUPRO16-A-6 · Injector 56EMUPRO16-A-7 · Injector 67EMUPRO16-A-8 · Injector 78EMUPRO16-A-9 · Injector 89EMUPRO16-A-10 · Ignition 710EMUPRO16-A-11 · Power GND11EMUPRO16-A-12 · +5V source A12EMUPRO16-A-13 · Digital 213EMUPRO16-A-14 · Digital 414EMUPRO16-A-15 · Digital 815EMUPRO16-A-16 · Digital 6 (turbo)16EMUPRO16-A-17 · Power GND17EMUPRO16-A-18 · Ignition 618EMUPRO16-A-19 · Power GND19EMUPRO16-A-20 · Digital GND20EMUPRO16-A-21 · Digital 1 (crank)21EMUPRO16-A-22 · Digital 322EMUPRO16-A-23 · Digital 723EMUPRO16-A-24 · Digital 5 (turbo)24EMUPRO16-A-25 · Auxiliary 925EMUPRO16-A-26 · Ignition 526EMUPRO16-A-27 · Ignition 427EMUPRO16-A-28 · Ignition 328EMUPRO16-A-29 · Ignition 229EMUPRO16-A-30 · Ignition 130EMUPRO16-A-31 · CAN 1 high (PC comm)31EMUPRO16-A-32 · CAN 1 low (PC comm)32EMUPRO16-A-33 · CAN 2 high33EMUPRO16-A-34 · CAN 2 low34
CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Ignition 8————————
2Injector 1—W27—0.5OEM-D-12———
3Injector 2—W28—0.5OEM-D-11———
4Injector 3—W29—0.5OEM-D-24———
5Injector 4—W30—0.5OEM-D-25———
6Injector 5————————
7Injector 6————————
8Injector 7————————
9Injector 8————————
10Ignition 7————————
11Power GND—W8—0.85SP-GND-1———
12+5V source A—W21—0.5OEM-A-11———
13Digital 2—W55—0.5OEM-C-2———
14Digital 4—W57—0.5OEM-A-19———
15Digital 8—W61—0.5OEM-A-2———
16Digital 6 (turbo)—W59—0.5OEM-A-20———
17Power GND—W9—0.85SP-GND-1———
18Ignition 6————————
19Power GND—W10—0.85SP-GND-1———
20Digital GND—W17—0.5SP-0V-1———
21Digital 1 (crank)—W22—0.5OEM-C-8———
22Digital 3—W56—0.5OEM-C-10———
23Digital 7—W60—0.5OEM-A-14———
24Digital 5 (turbo)—W58—0.5OEM-A-9———
25Auxiliary 9—W42—0.5OEM-D-6———
26Ignition 5————————
27Ignition 4————————
28Ignition 3————————
29Ignition 2—W26—0.5OEM-C-13———
30Ignition 1—W25—0.5OEM-C-5———
31CAN 1 high (PC comm)————————
32CAN 1 low (PC comm)————————
33CAN 2 high————————
34CAN 2 low————————

EMUPRO16-B

Mating face
Wire side
CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Auxiliary 1 (WBO heater)—W34—0.5OEM-B-4———
2Auxiliary 2 (WBO heater)—W35—0.5OEM-B-6———
3Auxiliary 3 (WBO heater)—W36—0.5OEM-B-7———
4Auxiliary 4 (WBO heater)—W37—0.5OEM-D-19———
5Auxiliary 5—W38—0.5OEM-D-20———
6Auxiliary 6—W39—0.5OEM-D-17———
7Auxiliary 7—W40—0.5OEM-D-8———
8+12V supply—W4—0.85SP-14V-1———
9Digital GND (flash drive)—W18—0.5SP-0V-1———
10USB D- (flash drive)————————
11USB D+ (flash drive)————————
12+5V source A (flash drive)————————
13Auxiliary 8—W41—0.5OEM-D-7———
14+12V supply—W3—0.85SP-14V-1———
15+12V switched—W31—0.5OEM-A-1———
16Knock sensor 1—W23—0.5OEM-C-3———
17Knock sensor 2—W24—0.5OEM-C-11———
18WBO 2 VGND (LSU 4.9)————————
19Power GND—W11—0.85SP-GND-1———
20WBO 1 IP (LSU 4.9)————————
21WBO 1 VS (LSU 4.9)————————
22WBO 1 RCAL (LSU 4.9)————————
23WBO 1 VGND (LSU 4.9)————————
24WBO 2 IP (LSU 4.9)————————
25WBO 2 VS (LSU 4.9)————————
26WBO 2 RCAL (LSU 4.9)————————

EMUPRO16-C

Mating face
EMUPRO16-C-1 · Auxiliary 101EMUPRO16-C-2 · Auxiliary 112EMUPRO16-C-3 · Auxiliary 123EMUPRO16-C-4 · Analog 74EMUPRO16-C-5 · Analog 10 (2k2 pull)5EMUPRO16-C-6 · H-bridge 1A6EMUPRO16-C-7 · H-bridge 2B7EMUPRO16-C-8 · H-bridge 3A8EMUPRO16-C-9 · H-bridge 2A9EMUPRO16-C-10 · Analog 1 (MAP)10EMUPRO16-C-11 · Analog 311EMUPRO16-C-12 · Analog 512EMUPRO16-C-13 · Analog 813EMUPRO16-C-14 · Analog 11 (2k2 pull)14EMUPRO16-C-15 · Analog 13 (1k pull)15EMUPRO16-C-16 · Analog 15 (330R pull)16EMUPRO16-C-17 · H-bridge 3B17EMUPRO16-C-18 · Analog 218EMUPRO16-C-19 · Analog 419EMUPRO16-C-20 · Analog 620EMUPRO16-C-21 · Analog 9 (2k2 pull)21EMUPRO16-C-22 · Analog 12 (2k2 pull)22EMUPRO16-C-23 · Analog 14 (1k pull)23EMUPRO16-C-24 · Analog 16 (100R pull)24EMUPRO16-C-25 · H-bridge 1B25EMUPRO16-C-26 · LIN26EMUPRO16-C-27 · +5V source B27EMUPRO16-C-28 · +5V source B28EMUPRO16-C-29 · Analog GND29EMUPRO16-C-30 · Power GND30EMUPRO16-C-31 · Precision analog 131EMUPRO16-C-32 · Precision analog 232EMUPRO16-C-33 · Precision analog 333EMUPRO16-C-34 · Precision analog 434
Wire side
EMUPRO16-C-1 · Auxiliary 101EMUPRO16-C-2 · Auxiliary 112EMUPRO16-C-3 · Auxiliary 123EMUPRO16-C-4 · Analog 74EMUPRO16-C-5 · Analog 10 (2k2 pull)5EMUPRO16-C-6 · H-bridge 1A6EMUPRO16-C-7 · H-bridge 2B7EMUPRO16-C-8 · H-bridge 3A8EMUPRO16-C-9 · H-bridge 2A9EMUPRO16-C-10 · Analog 1 (MAP)10EMUPRO16-C-11 · Analog 311EMUPRO16-C-12 · Analog 512EMUPRO16-C-13 · Analog 813EMUPRO16-C-14 · Analog 11 (2k2 pull)14EMUPRO16-C-15 · Analog 13 (1k pull)15EMUPRO16-C-16 · Analog 15 (330R pull)16EMUPRO16-C-17 · H-bridge 3B17EMUPRO16-C-18 · Analog 218EMUPRO16-C-19 · Analog 419EMUPRO16-C-20 · Analog 620EMUPRO16-C-21 · Analog 9 (2k2 pull)21EMUPRO16-C-22 · Analog 12 (2k2 pull)22EMUPRO16-C-23 · Analog 14 (1k pull)23EMUPRO16-C-24 · Analog 16 (100R pull)24EMUPRO16-C-25 · H-bridge 1B25EMUPRO16-C-26 · LIN26EMUPRO16-C-27 · +5V source B27EMUPRO16-C-28 · +5V source B28EMUPRO16-C-29 · Analog GND29EMUPRO16-C-30 · Power GND30EMUPRO16-C-31 · Precision analog 131EMUPRO16-C-32 · Precision analog 232EMUPRO16-C-33 · Precision analog 333EMUPRO16-C-34 · Precision analog 434
CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Auxiliary 10—W43—0.5OEM-D-5———
2Auxiliary 11—W44—0.5OEM-B-5———
3Auxiliary 12—W45—0.5OEM-B-8———
4Analog 7————————
5Analog 10 (2k2 pull)————————
6H-bridge 1A————————
7H-bridge 2B————————
8H-bridge 3A————————
9H-bridge 2A————————
10Analog 1 (MAP)————————
11Analog 3—W50—0.5OEM-A-6———
12Analog 5—W54—0.5OEM-A-7———
13Analog 8————————
14Analog 11 (2k2 pull)————————
15Analog 13 (1k pull)————————
16Analog 15 (330R pull)————————
17H-bridge 3B————————
18Analog 2—W33—0.5OEM-A-5———
19Analog 4—W52—0.5OEM-B-24———
20Analog 6—W65—0.5OEM-C-1———
21Analog 9 (2k2 pull)————————
22Analog 12 (2k2 pull)————————
23Analog 14 (1k pull)————————
24Analog 16 (100R pull)————————
25H-bridge 1B————————
26LIN————————
27+5V source B————————
28+5V source B————————
29Analog GND—W19—0.5SP-0V-1———
30Power GND—W12—0.85SP-GND-1———
31Precision analog 1—W32—0.5OEM-A-4———
32Precision analog 2—W49—0.5OEM-A-17———
33Precision analog 3—W51—0.5OEM-B-11———
34Precision analog 4—W53—0.5OEM-A-16———

EMUPRO16-D

Mating face
EMUPRO16-D-1 · Injector 101EMUPRO16-D-2 · Injector 112EMUPRO16-D-3 · Injector 123EMUPRO16-D-4 · Injector 134EMUPRO16-D-5 · Injector 145EMUPRO16-D-6 · Injector 156EMUPRO16-D-7 · Injector 167EMUPRO16-D-8 · Injector 98EMUPRO16-D-9 · Analog 179EMUPRO16-D-10 · Analog 1810EMUPRO16-D-11 · Digital 9 / Analog 1911EMUPRO16-D-12 · Digital 10 / Analog 2012EMUPRO16-D-13 · Auxiliary 1313EMUPRO16-D-14 · H-bridge 4A14EMUPRO16-D-15 · Precision analog 615EMUPRO16-D-16 · Precision analog 816EMUPRO16-D-17 · Analog GND17EMUPRO16-D-18 · Power GND18EMUPRO16-D-19 · Auxiliary 1419EMUPRO16-D-20 · H-bridge 4B20EMUPRO16-D-21 · Precision analog 521EMUPRO16-D-22 · Precision analog 722EMUPRO16-D-23 · Ignition 923EMUPRO16-D-24 · Ignition 1024EMUPRO16-D-25 · Auxiliary 1625EMUPRO16-D-26 · Auxiliary 1526
Wire side
EMUPRO16-D-1 · Injector 101EMUPRO16-D-2 · Injector 112EMUPRO16-D-3 · Injector 123EMUPRO16-D-4 · Injector 134EMUPRO16-D-5 · Injector 145EMUPRO16-D-6 · Injector 156EMUPRO16-D-7 · Injector 167EMUPRO16-D-8 · Injector 98EMUPRO16-D-9 · Analog 179EMUPRO16-D-10 · Analog 1810EMUPRO16-D-11 · Digital 9 / Analog 1911EMUPRO16-D-12 · Digital 10 / Analog 2012EMUPRO16-D-13 · Auxiliary 1313EMUPRO16-D-14 · H-bridge 4A14EMUPRO16-D-15 · Precision analog 615EMUPRO16-D-16 · Precision analog 816EMUPRO16-D-17 · Analog GND17EMUPRO16-D-18 · Power GND18EMUPRO16-D-19 · Auxiliary 1419EMUPRO16-D-20 · H-bridge 4B20EMUPRO16-D-21 · Precision analog 521EMUPRO16-D-22 · Precision analog 722EMUPRO16-D-23 · Ignition 923EMUPRO16-D-24 · Ignition 1024EMUPRO16-D-25 · Auxiliary 1625EMUPRO16-D-26 · Auxiliary 1526
CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Injector 10————————
2Injector 11————————
3Injector 12————————
4Injector 13————————
5Injector 14————————
6Injector 15————————
7Injector 16————————
8Injector 9————————
9Analog 17————————
10Analog 18————————
11Digital 9 / Analog 19—W62—0.5OEM-B-19———
12Digital 10 / Analog 20—W63—0.5OEM-B-20———
13Auxiliary 13—W46—0.5OEM-D-21———
14H-bridge 4A————————
15Precision analog 6————————
16Precision analog 8————————
17Analog GND—W20—0.5SP-0V-1———
18Power GND—W13—0.85SP-GND-1———
19Auxiliary 14—W47—0.5OEM-D-22———
20H-bridge 4B————————
21Precision analog 5—W64—0.5OEM-B-23———
22Precision analog 7————————
23Ignition 9————————
24Ignition 10————————
25Auxiliary 16————————
26Auxiliary 15—W48—0.5OEM-D-4———

OEM-A

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Ignition switch (IGSW)—W31—0.5EMUPRO16-B-15———
11Sensor supply +5V (VC)—W21—0.5EMUPRO16-A-12———
12EFI main relay (B+)—W1—0.85SP-14V-1———
13EFI main relay (B1+)—W2—0.85SP-14V-1———
14Neutral start switch (NSW)—W60—0.5EMUPRO16-A-23———
16Intake air temperature (THA)—W53—0.5EMUPRO16-C-34———
17O2 right front (OXR1)—W49—0.5EMUPRO16-C-32———
18Sensor ground (E2)—W14—0.5SP-0V-1———
19Vehicle speed (SPD)—W57—0.5EMUPRO16-A-14———
2Starter signal (STA)—W61—0.5EMUPRO16-A-15———
20Diagnostic test 2 (TE2)—W59—0.5EMUPRO16-A-16———
22Power ground (E1)—W5—0.85SP-GND-1———
4Throttle position (VTA1)—W32—0.5EMUPRO16-C-31———
5Coolant temperature (THW)—W33—0.5EMUPRO16-C-18———
6O2 left front (OXL1)—W50—0.5EMUPRO16-C-11———
7EGR temperature sensor—W54—0.5EMUPRO16-C-12———
8Knock/shield (KS)————————
9Diagnostic test 1 (TE1)—W58—0.5EMUPRO16-A-24———

OEM-B

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
11O2 right rear (OXR2)—W51—0.5EMUPRO16-C-33———
19Stop light switch (BK)—W62—0.5EMUPRO16-D-11———
20A/T kickdown switch (KD)—W63—0.5EMUPRO16-D-12———
23A/C request (AC)—W64—0.5EMUPRO16-D-21———
24O2 left rear (OXL2)—W52—0.5EMUPRO16-C-19———
26Battery constant (BATT)————————
4EFI main relay control (MREL)—W34—0.5EMUPRO16-B-1———
5Check-engine lamp (W)—W44—0.5EMUPRO16-C-2———
6Fuel pump relay (FPR)—W35—0.5EMUPRO16-B-2———
7A/C clutch relay (ACMG)—W36—0.5EMUPRO16-B-3———
8Fuel pump control (FC)—W45—0.5EMUPRO16-C-3———

OEM-C

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1TPS idle switch (IDL)—W65—0.5EMUPRO16-C-20———
10Igniter 2 feedback (IGF2)—W56—0.5EMUPRO16-A-22———
11Knock sensor 2 (KNK2)—W24—0.5EMUPRO16-B-17———
12Check connector VF2————————
13Ignition 2 (IGT2)—W26—0.5EMUPRO16-A-29———
15Cam sensor ground (G-)—W15—0.5SP-0V-1———
16Crank sensor - (NE-)—W16—0.5SP-0V-1———
2Igniter 1 feedback (IGF1)—W55—0.5EMUPRO16-A-13———
3Knock sensor 1 (KNK1)—W23—0.5EMUPRO16-B-16———
4Check connector VF1————————
5Ignition 1 (IGT1)—W25—0.5EMUPRO16-A-30———
6Cam sensor 2 + (G2+)————————
7Cam sensor 1 + (G1+)————————
8Crank sensor + (NE+)—W22—0.5EMUPRO16-A-21———

OEM-D

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
11Injector 2&8 (#20)—W28—0.5EMUPRO16-A-3———
12Injector 1&7 (#10)—W27—0.5EMUPRO16-A-2———
13Power ground (E01)—W6—0.85SP-GND-1———
17Cold start injector 1 (STJ1)—W39—0.5EMUPRO16-B-6———
19O2 heater 2 (HT2)—W37—0.5EMUPRO16-B-4———
20O2 heater 1 (HT1)—W38—0.5EMUPRO16-B-5———
21EGR solenoid—W46—0.5EMUPRO16-D-13———
22Fuel pressure-up VSV (PR)—W47—0.5EMUPRO16-D-19———
24Injector 3&5 (#40)—W29—0.5EMUPRO16-A-4———
25Injector 4&6 (#30)—W30—0.5EMUPRO16-A-5———
26Power ground (E02)—W7—0.85SP-GND-1———
4Cold start injector (STJ)—W48—0.5EMUPRO16-D-26———
5ISC stepper coil 4 (ISC4)—W43—0.5EMUPRO16-C-1———
6ISC stepper coil 3 (ISC3)—W42—0.5EMUPRO16-A-25———
7ISC stepper coil 2 (ISC2)—W41—0.5EMUPRO16-B-13———
8ISC stepper coil 1 (ISC1)—W40—0.5EMUPRO16-B-7———

SP-0V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W14—0.5OEM-A-18———
1——W15—0.5OEM-C-15———
1——W16—0.5OEM-C-16———
1——W17—0.5EMUPRO16-A-20———
1——W18—0.5EMUPRO16-B-9———
1——W19—0.5EMUPRO16-C-29———
1——W20—0.5EMUPRO16-D-17———

SP-14V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W1—0.85OEM-A-12———
1——W2—0.85OEM-A-13———
1——W3—0.85EMUPRO16-B-14———
1——W4—0.85EMUPRO16-B-8———

SP-GND

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W5—0.85OEM-A-22———
1——W6—0.85OEM-D-13———
1——W7—0.85OEM-D-26———
1——W8—0.85EMUPRO16-A-11———
1——W9—0.85EMUPRO16-A-17———
1——W10—0.85EMUPRO16-A-19———
1——W11—0.85EMUPRO16-B-19———
1——W12—0.85EMUPRO16-C-30———
1——W13—0.85EMUPRO16-D-18———

Pin map

OEM pointOEM functionOEM familyTarget pointTarget functionTarget familyWire colourEvidence
OEM-A-1Ignition switch (IGSW)digital_inEMUPRO16-B-15+12V switcheddigital_insingle_source
OEM-A-11Sensor supply +5V (VC)vrefEMUPRO16-A-12+5V source Avrefsingle_source
OEM-A-12EFI main relay (B+)power_inEMUPRO16-B-14 + EMUPRO16-B-8+12V supply + +12V supplypower_insingle_source
OEM-A-13EFI main relay (B1+)power_inEMUPRO16-B-14 + EMUPRO16-B-8+12V supply + +12V supplypower_insingle_source
OEM-A-14Neutral start switch (NSW)digital_inEMUPRO16-A-23Digital 7digital_insingle_source
OEM-A-16Intake air temperature (THA)temp_inEMUPRO16-C-34Precision analog 4analog_insingle_source
OEM-A-17O2 right front (OXR1)lambda_nb_inEMUPRO16-C-32Precision analog 2analog_insingle_source
OEM-A-18Sensor ground (E2)sensor_groundEMUPRO16-A-20 + EMUPRO16-B-9 + EMUPRO16-C-29 + EMUPRO16-D-17Digital GND + Digital GND (flash drive) + Analog GND + Analog GNDsensor_groundsingle_source
OEM-A-19Vehicle speed (SPD)digital_inEMUPRO16-A-14Digital 4digital_insingle_source
OEM-A-2Starter signal (STA)digital_inEMUPRO16-A-15Digital 8digital_insingle_source
OEM-A-20Diagnostic test 2 (TE2)digital_inEMUPRO16-A-16Digital 6 (turbo)digital_insingle_source
OEM-A-22Power ground (E1)groundEMUPRO16-A-11 + EMUPRO16-A-17 + EMUPRO16-A-19 + EMUPRO16-B-19 + EMUPRO16-C-30 + EMUPRO16-D-18Power GND + Power GND + Power GND + Power GND + Power GND + Power GNDgroundsingle_source
OEM-A-4Throttle position (VTA1)analog_inEMUPRO16-C-31Precision analog 1analog_insingle_source
OEM-A-5Coolant temperature (THW)temp_inEMUPRO16-C-18Analog 2analog_insingle_source
OEM-A-6O2 left front (OXL1)lambda_nb_inEMUPRO16-C-11Analog 3analog_insingle_source
OEM-A-7EGR temperature sensortemp_inEMUPRO16-C-12Analog 5analog_insingle_source
OEM-A-8Knock/shield (KS)knock_in———single_source
OEM-A-9Diagnostic test 1 (TE1)digital_inEMUPRO16-A-24Digital 5 (turbo)digital_insingle_source
OEM-B-11O2 right rear (OXR2)lambda_nb_inEMUPRO16-C-33Precision analog 3analog_insingle_source
OEM-B-19Stop light switch (BK)digital_inEMUPRO16-D-11Digital 9 / Analog 19digital_insingle_source
OEM-B-20A/T kickdown switch (KD)digital_inEMUPRO16-D-12Digital 10 / Analog 20digital_insingle_source
OEM-B-23A/C request (AC)digital_inEMUPRO16-D-21Precision analog 5analog_insingle_source
OEM-B-24O2 left rear (OXL2)lambda_nb_inEMUPRO16-C-19Analog 4analog_insingle_source
OEM-B-26Battery constant (BATT)power_in———single_source
OEM-B-4EFI main relay control (MREL)low_side_outEMUPRO16-B-1Auxiliary 1 (WBO heater)low_side_outsingle_source
OEM-B-5Check-engine lamp (W)low_side_outEMUPRO16-C-2Auxiliary 11low_side_outsingle_source
OEM-B-6Fuel pump relay (FPR)low_side_outEMUPRO16-B-2Auxiliary 2 (WBO heater)low_side_outsingle_source
OEM-B-7A/C clutch relay (ACMG)low_side_outEMUPRO16-B-3Auxiliary 3 (WBO heater)low_side_outsingle_source
OEM-B-8Fuel pump control (FC)low_side_outEMUPRO16-C-3Auxiliary 12low_side_outsingle_source
OEM-C-1TPS idle switch (IDL)digital_inEMUPRO16-C-20Analog 6analog_insingle_source
OEM-C-10Igniter 2 feedback (IGF2)digital_inEMUPRO16-A-22Digital 3digital_insingle_source
OEM-C-11Knock sensor 2 (KNK2)knock_inEMUPRO16-B-17Knock sensor 2knock_insingle_source
OEM-C-12Check connector VF2analog_out———single_source
OEM-C-13Ignition 2 (IGT2)ignition_outEMUPRO16-A-29Ignition 2ignition_outsingle_source
OEM-C-15Cam sensor ground (G-)sensor_groundEMUPRO16-A-20 + EMUPRO16-B-9 + EMUPRO16-C-29 + EMUPRO16-D-17Digital GND + Digital GND (flash drive) + Analog GND + Analog GNDsensor_groundsingle_source
OEM-C-16Crank sensor - (NE-)sensor_groundEMUPRO16-A-20 + EMUPRO16-B-9 + EMUPRO16-C-29 + EMUPRO16-D-17Digital GND + Digital GND (flash drive) + Analog GND + Analog GNDsensor_groundsingle_source
OEM-C-2Igniter 1 feedback (IGF1)digital_inEMUPRO16-A-13Digital 2digital_insingle_source
OEM-C-3Knock sensor 1 (KNK1)knock_inEMUPRO16-B-16Knock sensor 1knock_insingle_source
OEM-C-4Check connector VF1analog_out———single_source
OEM-C-5Ignition 1 (IGT1)ignition_outEMUPRO16-A-30Ignition 1ignition_outsingle_source
OEM-C-6Cam sensor 2 + (G2+)trigger_in———single_source
OEM-C-7Cam sensor 1 + (G1+)trigger_in———single_source
OEM-C-8Crank sensor + (NE+)trigger_inEMUPRO16-A-21Digital 1 (crank)trigger_insingle_source
OEM-D-11Injector 2&8 (#20)injector_outEMUPRO16-A-3Injector 2injector_outsingle_source
OEM-D-12Injector 1&7 (#10)injector_outEMUPRO16-A-2Injector 1injector_outsingle_source
OEM-D-13Power ground (E01)groundEMUPRO16-A-11 + EMUPRO16-A-17 + EMUPRO16-A-19 + EMUPRO16-B-19 + EMUPRO16-C-30 + EMUPRO16-D-18Power GND + Power GND + Power GND + Power GND + Power GND + Power GNDgroundsingle_source
OEM-D-17Cold start injector 1 (STJ1)low_side_outEMUPRO16-B-6Auxiliary 6low_side_outsingle_source
OEM-D-19O2 heater 2 (HT2)low_side_outEMUPRO16-B-4Auxiliary 4 (WBO heater)low_side_outsingle_source
OEM-D-20O2 heater 1 (HT1)low_side_outEMUPRO16-B-5Auxiliary 5low_side_outsingle_source
OEM-D-21EGR solenoidlow_side_outEMUPRO16-D-13Auxiliary 13low_side_outsingle_source
OEM-D-22Fuel pressure-up VSV (PR)low_side_outEMUPRO16-D-19Auxiliary 14low_side_outsingle_source
OEM-D-24Injector 3&5 (#40)injector_outEMUPRO16-A-4Injector 3injector_outsingle_source
OEM-D-25Injector 4&6 (#30)injector_outEMUPRO16-A-5Injector 4injector_outsingle_source
OEM-D-26Power ground (E02)groundEMUPRO16-A-11 + EMUPRO16-A-17 + EMUPRO16-A-19 + EMUPRO16-B-19 + EMUPRO16-C-30 + EMUPRO16-D-18Power GND + Power GND + Power GND + Power GND + Power GND + Power GNDgroundsingle_source
OEM-D-4Cold start injector (STJ)low_side_outEMUPRO16-D-26Auxiliary 15low_side_outsingle_source
OEM-D-5ISC stepper coil 4 (ISC4)low_side_outEMUPRO16-C-1Auxiliary 10low_side_outsingle_source
OEM-D-6ISC stepper coil 3 (ISC3)low_side_outEMUPRO16-A-25Auxiliary 9low_side_outsingle_source
OEM-D-7ISC stepper coil 2 (ISC2)low_side_outEMUPRO16-B-13Auxiliary 8low_side_outsingle_source
OEM-D-8ISC stepper coil 1 (ISC1)low_side_outEMUPRO16-B-7Auxiliary 7low_side_outsingle_source

Cut list

WireFromToGauge (mm²)ColourLengthSignalIdent
W1OEM-A-12SP-14V-10.85no routeEFI main relay (B+)—
W2OEM-A-13SP-14V-10.85no routeEFI main relay (B1+)—
W3SP-14V-1EMUPRO16-B-140.85no route+12V supply—
W4SP-14V-1EMUPRO16-B-80.85no route+12V supply—
W5OEM-A-22SP-GND-10.85no routePower ground (E1)—
W6OEM-D-13SP-GND-10.85no routePower ground (E01)—
W7OEM-D-26SP-GND-10.85no routePower ground (E02)—
W8SP-GND-1EMUPRO16-A-110.85no routePower GND—
W9SP-GND-1EMUPRO16-A-170.85no routePower GND—
W10SP-GND-1EMUPRO16-A-190.85no routePower GND—
W11SP-GND-1EMUPRO16-B-190.85no routePower GND—
W12SP-GND-1EMUPRO16-C-300.85no routePower GND—
W13SP-GND-1EMUPRO16-D-180.85no routePower GND—
W14OEM-A-18SP-0V-10.5no routeSensor ground (E2)—
W15OEM-C-15SP-0V-10.5no routeCam sensor ground (G-)—
W16OEM-C-16SP-0V-10.5no routeCrank sensor - (NE-)—
W17SP-0V-1EMUPRO16-A-200.5no routeDigital GND—
W18SP-0V-1EMUPRO16-B-90.5no routeDigital GND (flash drive)—
W19SP-0V-1EMUPRO16-C-290.5no routeAnalog GND—
W20SP-0V-1EMUPRO16-D-170.5no routeAnalog GND—
W21OEM-A-11EMUPRO16-A-120.5no routeSensor supply +5V (VC)—
W22OEM-C-8EMUPRO16-A-210.5no routeCrank sensor + (NE+)—
W23OEM-C-3EMUPRO16-B-160.5no routeKnock sensor 1 (KNK1)—
W24OEM-C-11EMUPRO16-B-170.5no routeKnock sensor 2 (KNK2)—
W25OEM-C-5EMUPRO16-A-300.5no routeIgnition 1 (IGT1)—
W26OEM-C-13EMUPRO16-A-290.5no routeIgnition 2 (IGT2)—
W27OEM-D-12EMUPRO16-A-20.5no routeInjector 1&7 (#10)—
W28OEM-D-11EMUPRO16-A-30.5no routeInjector 2&8 (#20)—
W29OEM-D-24EMUPRO16-A-40.5no routeInjector 3&5 (#40)—
W30OEM-D-25EMUPRO16-A-50.5no routeInjector 4&6 (#30)—
W31OEM-A-1EMUPRO16-B-150.5no routeIgnition switch (IGSW)—
W32OEM-A-4EMUPRO16-C-310.5no routeThrottle position (VTA1)—
W33OEM-A-5EMUPRO16-C-180.5no routeCoolant temperature (THW)—
W34OEM-B-4EMUPRO16-B-10.5no routeEFI main relay control (MREL)—
W35OEM-B-6EMUPRO16-B-20.5no routeFuel pump relay (FPR)—
W36OEM-B-7EMUPRO16-B-30.5no routeA/C clutch relay (ACMG)—
W37OEM-D-19EMUPRO16-B-40.5no routeO2 heater 2 (HT2)—
W38OEM-D-20EMUPRO16-B-50.5no routeO2 heater 1 (HT1)—
W39OEM-D-17EMUPRO16-B-60.5no routeCold start injector 1 (STJ1)—
W40OEM-D-8EMUPRO16-B-70.5no routeISC stepper coil 1 (ISC1)—
W41OEM-D-7EMUPRO16-B-130.5no routeISC stepper coil 2 (ISC2)—
W42OEM-D-6EMUPRO16-A-250.5no routeISC stepper coil 3 (ISC3)—
W43OEM-D-5EMUPRO16-C-10.5no routeISC stepper coil 4 (ISC4)—
W44OEM-B-5EMUPRO16-C-20.5no routeCheck-engine lamp (W)—
W45OEM-B-8EMUPRO16-C-30.5no routeFuel pump control (FC)—
W46OEM-D-21EMUPRO16-D-130.5no routeEGR solenoid—
W47OEM-D-22EMUPRO16-D-190.5no routeFuel pressure-up VSV (PR)—
W48OEM-D-4EMUPRO16-D-260.5no routeCold start injector (STJ)—
W49OEM-A-17EMUPRO16-C-320.5no routeO2 right front (OXR1)—
W50OEM-A-6EMUPRO16-C-110.5no routeO2 left front (OXL1)—
W51OEM-B-11EMUPRO16-C-330.5no routeO2 right rear (OXR2)—
W52OEM-B-24EMUPRO16-C-190.5no routeO2 left rear (OXL2)—
W53OEM-A-16EMUPRO16-C-340.5no routeIntake air temperature (THA)—
W54OEM-A-7EMUPRO16-C-120.5no routeEGR temperature sensor—
W55OEM-C-2EMUPRO16-A-130.5no routeIgniter 1 feedback (IGF1)—
W56OEM-C-10EMUPRO16-A-220.5no routeIgniter 2 feedback (IGF2)—
W57OEM-A-19EMUPRO16-A-140.5no routeVehicle speed (SPD)—
W58OEM-A-9EMUPRO16-A-240.5no routeDiagnostic test 1 (TE1)—
W59OEM-A-20EMUPRO16-A-160.5no routeDiagnostic test 2 (TE2)—
W60OEM-A-14EMUPRO16-A-230.5no routeNeutral start switch (NSW)—
W61OEM-A-2EMUPRO16-A-150.5no routeStarter signal (STA)—
W62OEM-B-19EMUPRO16-D-110.5no routeStop light switch (BK)—
W63OEM-B-20EMUPRO16-D-120.5no routeA/T kickdown switch (KD)—
W64OEM-B-23EMUPRO16-D-210.5no routeA/C request (AC)—
W65OEM-C-1EMUPRO16-C-200.5no routeTPS idle switch (IDL)—

Bill of materials

CategoryPart numberManufacturerDescriptionQtyUnit
connector1473416-1TESuperseal 1.0 26-way plug, Key 31.000ea
connector3-1437290-7TESuperseal 1.0 26-way plug1.000ea
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)57.000ea

ECU setup sheet

RoleEngine refEngine signalSensorECU pointECU functionECU classSetup flag
No configured channels.

Findings

Open (8)

SeverityCodeSubjectMessage
errorREQUIRED_UNMAPPEDOEM-C-6Required OEM function "Cam sensor 2 + (G2+)" (trigger_in) is not connected to the new ECU.
errorREQUIRED_UNMAPPEDOEM-C-7Required OEM function "Cam sensor 1 + (G1+)" (trigger_in) is not connected to the new ECU.
warnNET_FAMILYOEM-B-23 ↔ EMUPRO16-D-21OEM-B-23 "A/C request (AC)" [digital_in] is wired to EMUPRO16-D-21 "Precision analog 5" [analog_in]. Analog and digital on one net. A switch on an analog input works with a pull-up and a threshold; an analog sensor on a digital input loses its value.
warnNET_FAMILYOEM-C-1 ↔ EMUPRO16-C-20OEM-C-1 "TPS idle switch (IDL)" [digital_in] is wired to EMUPRO16-C-20 "Analog 6" [analog_in]. Analog and digital on one net. A switch on an analog input works with a pull-up and a threshold; an analog sensor on a digital input loses its value.
infoNET_FAMILYOEM-A-16 ↔ EMUPRO16-C-34OEM-A-16 "Intake air temperature (THA)" [temp_in] is wired to EMUPRO16-C-34 "Precision analog 4" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one.
infoNET_FAMILYOEM-A-5 ↔ EMUPRO16-C-18OEM-A-5 "Coolant temperature (THW)" [temp_in] is wired to EMUPRO16-C-18 "Analog 2" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one.
infoNET_FAMILYOEM-A-7 ↔ EMUPRO16-C-12OEM-A-7 "EGR temperature sensor" [temp_in] is wired to EMUPRO16-C-12 "Analog 5" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one.
infoUNMAPPEDOEM3 optional OEM pins are not mapped: OEM-A-8 Knock/shield (KS); OEM-C-12 Check connector VF2; OEM-C-4 Check connector VF1

Accepted (1)

CodeSubjectReasonBy
REQUIRED_UNMAPPEDOEM-B-26Battery-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-C 7: Cam sensor 1 + (G1+): no free cam_vr/cam_hall/frequency_in input on ECUMASTER EMU PRO 16 - OEM-C 6: Cam sensor 2 + (G2+): no free cam_vr/cam_hall/frequency_in input on ECUMASTER EMU PRO 16 Not wired: - OEM-B 26: Battery constant (BATT): ECUMASTER EMU PRO 16 has no battery-constant input; not needed - OEM-A 8: Knock/shield (KS): no free knock input on ECUMASTER EMU PRO 16 - OEM-C 4: Check connector VF1: no free analog_out on ECUMASTER EMU PRO 16 - OEM-C 12: Check connector VF2: no free analog_out on ECUMASTER EMU PRO 16

Sources

ReliabilityKindTitleURLArchiveCapturedSHA-256
4vendor_docECUMASTER EMU PRO 16 — pinout (Connectors A/B/C/D)https://www.ecumaster.com/files/EMU_PRO/EMU_PRO_16_Pinout_v1.0.pdfarchive2026-10-0572799bed63fb
2community_copyLextreme: Adaptronic install for 1UZ-FE (Lexus LS400/SC400) — 4-plug A/B/C/D ECU pin table (1992 LS400)https://www.lextreme.com/installation-of-an-adaptronic-ecu-for-a-lexus-ls400-sc400-1uzfe-engine/———