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Lexus IS300 (XE10 / JCE10) 2001-05 2JZ-GE VVT-i → ECUMASTER EMU PRO 16 (auto)

Lexus IS300 (XE10 / JCE10) 2001-05 2JZ-GE VVT-i — 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 errors3: read the Findings page before cutting any wire
Size of the job69 wires · 13 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-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-1EMUPRO16-B-140.85☐☐☐☐☐☐☐
W6SP-14V-1EMUPRO16-B-80.85☐☐☐☐☐☐☐
W7OEM-E6-17SP-GND-10.85☐☐☐☐☐☐☐
W8OEM-E7-21SP-GND-10.85☐☐☐☐☐☐☐
W9SP-GND-1EMUPRO16-A-110.85☐☐☐☐☐☐☐
W10SP-GND-1EMUPRO16-A-170.85☐☐☐☐☐☐☐
W11SP-GND-1EMUPRO16-A-190.85☐☐☐☐☐☐☐
W12SP-GND-1EMUPRO16-B-190.85☐☐☐☐☐☐☐
W13SP-GND-1EMUPRO16-C-300.85☐☐☐☐☐☐☐
W14SP-GND-1EMUPRO16-D-180.85☐☐☐☐☐☐☐
W15OEM-E6-18SP-0V-10.5☐☐☐☐☐☐☐
W16OEM-E6-19SP-0V-10.5☐☐☐☐☐☐☐
W17OEM-E7-22SP-0V-10.5☐☐☐☐☐☐☐
W18SP-0V-1EMUPRO16-A-200.5☐☐☐☐☐☐☐
W19SP-0V-1EMUPRO16-B-90.5☐☐☐☐☐☐☐
W20SP-0V-1EMUPRO16-C-290.5☐☐☐☐☐☐☐
W21SP-0V-1EMUPRO16-D-170.5☐☐☐☐☐☐☐
W22OEM-E6-2EMUPRO16-A-120.5☐☐☐☐☐☐☐
W23OEM-E7-23EMUPRO16-A-210.5☐☐☐☐☐☐☐
W24OEM-E7-28EMUPRO16-B-160.5☐☐☐☐☐☐☐
W25OEM-E7-27EMUPRO16-B-170.5☐☐☐☐☐☐☐
W26OEM-E7-11EMUPRO16-A-300.5☐☐☐☐☐☐☐
W27OEM-E7-12EMUPRO16-A-290.5☐☐☐☐☐☐☐
W28OEM-E7-13EMUPRO16-A-280.5☐☐☐☐☐☐☐
W29OEM-E6-5EMUPRO16-A-20.5☐☐☐☐☐☐☐
W30OEM-E6-6EMUPRO16-A-30.5☐☐☐☐☐☐☐
W31OEM-E7-1EMUPRO16-A-40.5☐☐☐☐☐☐☐
W32OEM-E7-2EMUPRO16-A-50.5☐☐☐☐☐☐☐
W33OEM-E7-3EMUPRO16-A-60.5☐☐☐☐☐☐☐
W34OEM-E7-4EMUPRO16-A-70.5☐☐☐☐☐☐☐
W35OEM-E3-9EMUPRO16-B-150.5☐☐☐☐☐☐☐
W36OEM-E7-17EMUPRO16-B-10.5☐☐☐☐☐☐☐
W37OEM-E7-18EMUPRO16-B-20.5☐☐☐☐☐☐☐
W38OEM-E7-19EMUPRO16-B-30.5☐☐☐☐☐☐☐
W39OEM-E7-20EMUPRO16-B-40.5☐☐☐☐☐☐☐
W40OEM-E6-15EMUPRO16-C-310.5☐☐☐☐☐☐☐
W41OEM-E6-23EMUPRO16-C-180.5☐☐☐☐☐☐☐
W42OEM-E6-16EMUPRO16-C-320.5☐☐☐☐☐☐☐
W43OEM-E6-24EMUPRO16-C-110.5☐☐☐☐☐☐☐
W44OEM-E6-14EMUPRO16-C-330.5☐☐☐☐☐☐☐
W45OEM-E3-10EMUPRO16-B-50.5☐☐☐☐☐☐☐
W46OEM-E3-4EMUPRO16-B-60.5☐☐☐☐☐☐☐
W47OEM-E4-13EMUPRO16-B-70.5☐☐☐☐☐☐☐
W48OEM-E2-25EMUPRO16-B-130.5☐☐☐☐☐☐☐
W49OEM-E2-26EMUPRO16-A-250.5☐☐☐☐☐☐☐
W50OEM-E6-3EMUPRO16-C-10.5☐☐☐☐☐☐☐
W51OEM-E6-4EMUPRO16-C-20.5☐☐☐☐☐☐☐
W52OEM-E3-5EMUPRO16-C-30.5☐☐☐☐☐☐☐
W53OEM-E3-6EMUPRO16-D-130.5☐☐☐☐☐☐☐
W54OEM-E5-12EMUPRO16-D-190.5☐☐☐☐☐☐☐
W55OEM-E6-7EMUPRO16-D-260.5☐☐☐☐☐☐☐
W56OEM-E7-5EMUPRO16-D-250.5☐☐☐☐☐☐☐
W57OEM-E6-10EMUPRO16-C-190.5☐☐☐☐☐☐☐
W58OEM-E2-24EMUPRO16-C-340.5☐☐☐☐☐☐☐
W59OEM-E4-8EMUPRO16-C-120.5☐☐☐☐☐☐☐
W60OEM-E6-11EMUPRO16-D-210.5☐☐☐☐☐☐☐
W61OEM-E6-12EMUPRO16-C-200.5☐☐☐☐☐☐☐
W62OEM-E6-22EMUPRO16-D-150.5☐☐☐☐☐☐☐
W63OEM-E4-18EMUPRO16-C-40.5☐☐☐☐☐☐☐
W64OEM-E5-11EMUPRO16-A-130.5☐☐☐☐☐☐☐
W65OEM-E5-5EMUPRO16-A-220.5☐☐☐☐☐☐☐
W66OEM-E7-25EMUPRO16-A-140.5☐☐☐☐☐☐☐
W67OEM-E4-2EMUPRO16-A-240.5☐☐☐☐☐☐☐
W68OEM-E4-5EMUPRO16-A-160.5☐☐☐☐☐☐☐
W69OEM-E4-6EMUPRO16-A-230.5☐☐☐☐☐☐☐

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

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Schematic

EMUPRO16-AEMUPRO16-BEMUPRO16-CEMUPRO16-DOEM-E2OEM-E3OEM-E4OEM-E5OEM-E6OEM-E7SP-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—W29—0.5OEM-E6-5———
3Injector 2—W30—0.5OEM-E6-6———
4Injector 3—W31—0.5OEM-E7-1———
5Injector 4—W32—0.5OEM-E7-2———
6Injector 5—W33—0.5OEM-E7-3———
7Injector 6—W34—0.5OEM-E7-4———
8Injector 7————————
9Injector 8————————
10Ignition 7————————
11Power GND—W9—0.85SP-GND-1———
12+5V source A—W22—0.5OEM-E6-2———
13Digital 2—W64—0.5OEM-E5-11———
14Digital 4—W66—0.5OEM-E7-25———
15Digital 8————————
16Digital 6 (turbo)—W68—0.5OEM-E4-5———
17Power GND—W10—0.85SP-GND-1———
18Ignition 6————————
19Power GND—W11—0.85SP-GND-1———
20Digital GND—W18—0.5SP-0V-1———
21Digital 1 (crank)—W23—0.5OEM-E7-23———
22Digital 3—W65—0.5OEM-E5-5———
23Digital 7—W69—0.5OEM-E4-6———
24Digital 5 (turbo)—W67—0.5OEM-E4-2———
25Auxiliary 9—W49—0.5OEM-E2-26———
26Ignition 5————————
27Ignition 4————————
28Ignition 3—W28—0.5OEM-E7-13———
29Ignition 2—W27—0.5OEM-E7-12———
30Ignition 1—W26—0.5OEM-E7-11———
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)—W36—0.5OEM-E7-17———
2Auxiliary 2 (WBO heater)—W37—0.5OEM-E7-18———
3Auxiliary 3 (WBO heater)—W38—0.5OEM-E7-19———
4Auxiliary 4 (WBO heater)—W39—0.5OEM-E7-20———
5Auxiliary 5—W45—0.5OEM-E3-10———
6Auxiliary 6—W46—0.5OEM-E3-4———
7Auxiliary 7—W47—0.5OEM-E4-13———
8+12V supply—W6—0.85SP-14V-1———
9Digital GND (flash drive)—W19—0.5SP-0V-1———
10USB D- (flash drive)————————
11USB D+ (flash drive)————————
12+5V source A (flash drive)————————
13Auxiliary 8—W48—0.5OEM-E2-25———
14+12V supply—W5—0.85SP-14V-1———
15+12V switched—W35—0.5OEM-E3-9———
16Knock sensor 1—W24—0.5OEM-E7-28———
17Knock sensor 2—W25—0.5OEM-E7-27———
18WBO 2 VGND (LSU 4.9)————————
19Power GND—W12—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—W50—0.5OEM-E6-3———
2Auxiliary 11—W51—0.5OEM-E6-4———
3Auxiliary 12—W52—0.5OEM-E3-5———
4Analog 7—W63—0.5OEM-E4-18———
5Analog 10 (2k2 pull)————————
6H-bridge 1A————————
7H-bridge 2B————————
8H-bridge 3A————————
9H-bridge 2A————————
10Analog 1 (MAP)————————
11Analog 3—W43—0.5OEM-E6-24———
12Analog 5—W59—0.5OEM-E4-8———
13Analog 8————————
14Analog 11 (2k2 pull)————————
15Analog 13 (1k pull)————————
16Analog 15 (330R pull)————————
17H-bridge 3B————————
18Analog 2—W41—0.5OEM-E6-23———
19Analog 4—W57—0.5OEM-E6-10———
20Analog 6—W61—0.5OEM-E6-12———
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—W20—0.5SP-0V-1———
30Power GND—W13—0.85SP-GND-1———
31Precision analog 1—W40—0.5OEM-E6-15———
32Precision analog 2—W42—0.5OEM-E6-16———
33Precision analog 3—W44—0.5OEM-E6-14———
34Precision analog 4—W58—0.5OEM-E2-24———

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————————
12Digital 10 / Analog 20————————
13Auxiliary 13—W53—0.5OEM-E3-6———
14H-bridge 4A————————
15Precision analog 6—W62—0.5OEM-E6-22———
16Precision analog 8————————
17Analog GND—W21—0.5SP-0V-1———
18Power GND—W14—0.85SP-GND-1———
19Auxiliary 14—W54—0.5OEM-E5-12———
20H-bridge 4B————————
21Precision analog 5—W60—0.5OEM-E6-11———
22Precision analog 7————————
23Ignition 9————————
24Ignition 10————————
25Auxiliary 16—W56—0.5OEM-E7-5———
26Auxiliary 15—W55—0.5OEM-E6-7———

OEM-E2

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
13ETCS power (TBP, throttle bypass)—W1—0.85SP-14V-1———
24O2 right rear (OXR2)—W58—0.5EMUPRO16-C-34———
25O2 heater right rear (HTR2)—W48—0.5EMUPRO16-B-13———
26O2 heater left rear (HTL2)—W49—0.5EMUPRO16-A-25———

OEM-E3

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Battery constant (BATT)————————
10EFI main relay control (MREL)—W45—0.5EMUPRO16-B-5———
11Serial diagnostic (SIL)————————
16EFI main relay (+B)—W2—0.85SP-14V-1———
4Fuel pump relay (FPR)—W46—0.5EMUPRO16-B-6———
5Fuel pump control (FC)—W52—0.5EMUPRO16-C-3———
6Check-engine lamp (W)—W53—0.5EMUPRO16-D-13———
7ETCS main relay (+BM)—W3—0.85SP-14V-1———
8EFI main relay (+B2)—W4—0.85SP-14V-1———
9Ignition switch (IGSW)—W35—0.5EMUPRO16-B-15———

OEM-E4

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
13A/C clutch relay (ACMG)—W47—0.5EMUPRO16-B-7———
18EVAP vapor pressure (PTNK)—W63—0.5EMUPRO16-C-4———
2Starter signal (STA)—W67—0.5EMUPRO16-A-24———
5Diagnostic/timing check (TC)—W68—0.5EMUPRO16-A-16———
6Stop light switch (STP)—W69—0.5EMUPRO16-A-23———
8O2 left rear (OXL2)—W59—0.5EMUPRO16-C-12———

OEM-E5

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
11Vehicle speed sensor (SP2-)—W64—0.5EMUPRO16-A-13———
12Canister close valve (CCV)—W54—0.5EMUPRO16-D-19———
5Vehicle speed sensor (SP2+)—W65—0.5EMUPRO16-A-22———

OEM-E6

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
10Mass air flow (VG)—W57—0.5EMUPRO16-C-19———
11O2 right front (OXR1)—W60—0.5EMUPRO16-D-21———
12O2 left front (OXL1)—W61—0.5EMUPRO16-C-20———
14Coolant temperature (THW)—W44—0.5EMUPRO16-C-33———
15Accelerator pedal 1 (VPA)—W40—0.5EMUPRO16-C-31———
16Accelerator pedal 2 (VPA2)—W42—0.5EMUPRO16-C-32———
17Power ground (E1)—W7—0.85SP-GND-1———
18Sensor ground (E2)—W15—0.5SP-0V-1———
19MAF ground (EVG)—W16—0.5SP-0V-1———
2Sensor supply +5V (VC)—W22—0.5EMUPRO16-A-12———
22Intake air temperature (THA)—W62—0.5EMUPRO16-D-15———
23Throttle position 1 (VTA)—W41—0.5EMUPRO16-C-18———
24Throttle position 2 (VTA2)—W43—0.5EMUPRO16-C-11———
3O2 heater right front (HTR)—W50—0.5EMUPRO16-C-1———
4O2 heater left front (HTL)—W51—0.5EMUPRO16-C-2———
5Injector 1 (#10)—W29—0.5EMUPRO16-A-2———
6Injector 2 (#20)—W30—0.5EMUPRO16-A-3———
7EVAP purge VSV (PRG)—W55—0.5EMUPRO16-D-26———

OEM-E7

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Injector 3 (#30)—W31—0.5EMUPRO16-A-4———
10Cam position (G2)————————
11Ignition 1 (IGT)—W26—0.5EMUPRO16-A-30———
12Ignition 2 (IGT2)—W27—0.5EMUPRO16-A-29———
13Ignition 3 (IGT3)—W28—0.5EMUPRO16-A-28———
17VVT-i OCV - (OCV-)—W36—0.5EMUPRO16-B-1———
18VVT-i OCV + (OCV+)—W37—0.5EMUPRO16-B-2———
19ETCS throttle clutch - (CL-)—W38—0.5EMUPRO16-B-3———
2Injector 4 (#40)—W32—0.5EMUPRO16-A-5———
20ETCS throttle clutch + (CL+)—W39—0.5EMUPRO16-B-4———
21Power ground (E01)—W8—0.85SP-GND-1———
22Crank position return (NE-)—W17—0.5SP-0V-1———
23Crank position (NE)—W23—0.5EMUPRO16-A-21———
25Igniter feedback (IGF)—W66—0.5EMUPRO16-A-14———
27Knock sensor 2 (KNK2)—W25—0.5EMUPRO16-B-17———
28Knock sensor 1 (KNK1)—W24—0.5EMUPRO16-B-16———
3Injector 5 (#50)—W33—0.5EMUPRO16-A-6———
4Injector 6 (#60)—W34—0.5EMUPRO16-A-7———
5ACIS intake VSV—W56—0.5EMUPRO16-D-25———
7ETCS throttle motor - (M-)————————
8ETCS throttle motor + (M+)————————

SP-0V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W15—0.5OEM-E6-18———
1——W16—0.5OEM-E6-19———
1——W17—0.5OEM-E7-22———
1——W18—0.5EMUPRO16-A-20———
1——W19—0.5EMUPRO16-B-9———
1——W20—0.5EMUPRO16-C-29———
1——W21—0.5EMUPRO16-D-17———

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—0.85EMUPRO16-B-14———
1——W6—0.85EMUPRO16-B-8———

SP-GND

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W7—0.85OEM-E6-17———
1——W8—0.85OEM-E7-21———
1——W9—0.85EMUPRO16-A-11———
1——W10—0.85EMUPRO16-A-17———
1——W11—0.85EMUPRO16-A-19———
1——W12—0.85EMUPRO16-B-19———
1——W13—0.85EMUPRO16-C-30———
1——W14—0.85EMUPRO16-D-18———

Pin map

OEM pointOEM functionOEM familyTarget pointTarget functionTarget familyWire colourEvidence
OEM-E2-13ETCS power (TBP, throttle bypass)power_inEMUPRO16-B-14 + EMUPRO16-B-8+12V supply + +12V supplypower_insingle_source
OEM-E2-24O2 right rear (OXR2)lambda_nb_inEMUPRO16-C-34Precision analog 4analog_insingle_source
OEM-E2-25O2 heater right rear (HTR2)low_side_outEMUPRO16-B-13Auxiliary 8low_side_outsingle_source
OEM-E2-26O2 heater left rear (HTL2)low_side_outEMUPRO16-A-25Auxiliary 9low_side_outsingle_source
OEM-E3-1Battery constant (BATT)power_in———single_source
OEM-E3-10EFI main relay control (MREL)low_side_outEMUPRO16-B-5Auxiliary 5low_side_outsingle_source
OEM-E3-11Serial diagnostic (SIL)serial———single_source
OEM-E3-16EFI main relay (+B)power_inEMUPRO16-B-14 + EMUPRO16-B-8+12V supply + +12V supplypower_insingle_source
OEM-E3-4Fuel pump relay (FPR)low_side_outEMUPRO16-B-6Auxiliary 6low_side_outsingle_source
OEM-E3-5Fuel pump control (FC)low_side_outEMUPRO16-C-3Auxiliary 12low_side_outsingle_source
OEM-E3-6Check-engine lamp (W)low_side_outEMUPRO16-D-13Auxiliary 13low_side_outsingle_source
OEM-E3-7ETCS main relay (+BM)power_inEMUPRO16-B-14 + EMUPRO16-B-8+12V supply + +12V supplypower_insingle_source
OEM-E3-8EFI main relay (+B2)power_inEMUPRO16-B-14 + EMUPRO16-B-8+12V supply + +12V supplypower_insingle_source
OEM-E3-9Ignition switch (IGSW)digital_inEMUPRO16-B-15+12V switcheddigital_insingle_source
OEM-E4-13A/C clutch relay (ACMG)low_side_outEMUPRO16-B-7Auxiliary 7low_side_outsingle_source
OEM-E4-18EVAP vapor pressure (PTNK)analog_inEMUPRO16-C-4Analog 7analog_insingle_source
OEM-E4-2Starter signal (STA)digital_inEMUPRO16-A-24Digital 5 (turbo)digital_insingle_source
OEM-E4-5Diagnostic/timing check (TC)digital_inEMUPRO16-A-16Digital 6 (turbo)digital_insingle_source
OEM-E4-6Stop light switch (STP)digital_inEMUPRO16-A-23Digital 7digital_insingle_source
OEM-E4-8O2 left rear (OXL2)lambda_nb_inEMUPRO16-C-12Analog 5analog_insingle_source
OEM-E5-11Vehicle speed sensor (SP2-)digital_inEMUPRO16-A-13Digital 2digital_insingle_source
OEM-E5-12Canister close valve (CCV)low_side_outEMUPRO16-D-19Auxiliary 14low_side_outsingle_source
OEM-E5-5Vehicle speed sensor (SP2+)digital_inEMUPRO16-A-22Digital 3digital_insingle_source
OEM-E6-10Mass air flow (VG)analog_inEMUPRO16-C-19Analog 4analog_insingle_source
OEM-E6-11O2 right front (OXR1)lambda_nb_inEMUPRO16-D-21Precision analog 5analog_insingle_source
OEM-E6-12O2 left front (OXL1)lambda_nb_inEMUPRO16-C-20Analog 6analog_insingle_source
OEM-E6-14Coolant temperature (THW)temp_inEMUPRO16-C-33Precision analog 3analog_insingle_source
OEM-E6-15Accelerator pedal 1 (VPA)analog_inEMUPRO16-C-31Precision analog 1analog_insingle_source
OEM-E6-16Accelerator pedal 2 (VPA2)analog_inEMUPRO16-C-32Precision analog 2analog_insingle_source
OEM-E6-17Power 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-E6-18Sensor 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-E6-19MAF ground (EVG)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-E6-2Sensor supply +5V (VC)vrefEMUPRO16-A-12+5V source Avrefsingle_source
OEM-E6-22Intake air temperature (THA)temp_inEMUPRO16-D-15Precision analog 6analog_insingle_source
OEM-E6-23Throttle position 1 (VTA)analog_inEMUPRO16-C-18Analog 2analog_insingle_source
OEM-E6-24Throttle position 2 (VTA2)analog_inEMUPRO16-C-11Analog 3analog_insingle_source
OEM-E6-3O2 heater right front (HTR)low_side_outEMUPRO16-C-1Auxiliary 10low_side_outsingle_source
OEM-E6-4O2 heater left front (HTL)low_side_outEMUPRO16-C-2Auxiliary 11low_side_outsingle_source
OEM-E6-5Injector 1 (#10)injector_outEMUPRO16-A-2Injector 1injector_outsingle_source
OEM-E6-6Injector 2 (#20)injector_outEMUPRO16-A-3Injector 2injector_outsingle_source
OEM-E6-7EVAP purge VSV (PRG)low_side_outEMUPRO16-D-26Auxiliary 15low_side_outsingle_source
OEM-E7-1Injector 3 (#30)injector_outEMUPRO16-A-4Injector 3injector_outsingle_source
OEM-E7-10Cam position (G2)trigger_in———single_source
OEM-E7-11Ignition 1 (IGT)ignition_outEMUPRO16-A-30Ignition 1ignition_outsingle_source
OEM-E7-12Ignition 2 (IGT2)ignition_outEMUPRO16-A-29Ignition 2ignition_outsingle_source
OEM-E7-13Ignition 3 (IGT3)ignition_outEMUPRO16-A-28Ignition 3ignition_outsingle_source
OEM-E7-17VVT-i OCV - (OCV-)low_side_outEMUPRO16-B-1Auxiliary 1 (WBO heater)low_side_outsingle_source
OEM-E7-18VVT-i OCV + (OCV+)low_side_outEMUPRO16-B-2Auxiliary 2 (WBO heater)low_side_outsingle_source
OEM-E7-19ETCS throttle clutch - (CL-)low_side_outEMUPRO16-B-3Auxiliary 3 (WBO heater)low_side_outsingle_source
OEM-E7-2Injector 4 (#40)injector_outEMUPRO16-A-5Injector 4injector_outsingle_source
OEM-E7-20ETCS throttle clutch + (CL+)low_side_outEMUPRO16-B-4Auxiliary 4 (WBO heater)low_side_outsingle_source
OEM-E7-21Power 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-E7-22Crank position return (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-E7-23Crank position (NE)trigger_inEMUPRO16-A-21Digital 1 (crank)trigger_insingle_source
OEM-E7-25Igniter feedback (IGF)digital_inEMUPRO16-A-14Digital 4digital_insingle_source
OEM-E7-27Knock sensor 2 (KNK2)knock_inEMUPRO16-B-17Knock sensor 2knock_insingle_source
OEM-E7-28Knock sensor 1 (KNK1)knock_inEMUPRO16-B-16Knock sensor 1knock_insingle_source
OEM-E7-3Injector 5 (#50)injector_outEMUPRO16-A-6Injector 5injector_outsingle_source
OEM-E7-4Injector 6 (#60)injector_outEMUPRO16-A-7Injector 6injector_outsingle_source
OEM-E7-5ACIS intake VSVlow_side_outEMUPRO16-D-25Auxiliary 16low_side_outsingle_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-1EMUPRO16-B-140.85no route+12V supply—
W6SP-14V-1EMUPRO16-B-80.85no route+12V supply—
W7OEM-E6-17SP-GND-10.85no routePower ground (E1)—
W8OEM-E7-21SP-GND-10.85no routePower ground (E01)—
W9SP-GND-1EMUPRO16-A-110.85no routePower GND—
W10SP-GND-1EMUPRO16-A-170.85no routePower GND—
W11SP-GND-1EMUPRO16-A-190.85no routePower GND—
W12SP-GND-1EMUPRO16-B-190.85no routePower GND—
W13SP-GND-1EMUPRO16-C-300.85no routePower GND—
W14SP-GND-1EMUPRO16-D-180.85no routePower GND—
W15OEM-E6-18SP-0V-10.5no routeSensor ground (E2)—
W16OEM-E6-19SP-0V-10.5no routeMAF ground (EVG)—
W17OEM-E7-22SP-0V-10.5no routeCrank position return (NE-)—
W18SP-0V-1EMUPRO16-A-200.5no routeDigital GND—
W19SP-0V-1EMUPRO16-B-90.5no routeDigital GND (flash drive)—
W20SP-0V-1EMUPRO16-C-290.5no routeAnalog GND—
W21SP-0V-1EMUPRO16-D-170.5no routeAnalog GND—
W22OEM-E6-2EMUPRO16-A-120.5no routeSensor supply +5V (VC)—
W23OEM-E7-23EMUPRO16-A-210.5no routeCrank position (NE)—
W24OEM-E7-28EMUPRO16-B-160.5no routeKnock sensor 1 (KNK1)—
W25OEM-E7-27EMUPRO16-B-170.5no routeKnock sensor 2 (KNK2)—
W26OEM-E7-11EMUPRO16-A-300.5no routeIgnition 1 (IGT)—
W27OEM-E7-12EMUPRO16-A-290.5no routeIgnition 2 (IGT2)—
W28OEM-E7-13EMUPRO16-A-280.5no routeIgnition 3 (IGT3)—
W29OEM-E6-5EMUPRO16-A-20.5no routeInjector 1 (#10)—
W30OEM-E6-6EMUPRO16-A-30.5no routeInjector 2 (#20)—
W31OEM-E7-1EMUPRO16-A-40.5no routeInjector 3 (#30)—
W32OEM-E7-2EMUPRO16-A-50.5no routeInjector 4 (#40)—
W33OEM-E7-3EMUPRO16-A-60.5no routeInjector 5 (#50)—
W34OEM-E7-4EMUPRO16-A-70.5no routeInjector 6 (#60)—
W35OEM-E3-9EMUPRO16-B-150.5no routeIgnition switch (IGSW)—
W36OEM-E7-17EMUPRO16-B-10.5no routeVVT-i OCV - (OCV-)—
W37OEM-E7-18EMUPRO16-B-20.5no routeVVT-i OCV + (OCV+)—
W38OEM-E7-19EMUPRO16-B-30.5no routeETCS throttle clutch - (CL-)—
W39OEM-E7-20EMUPRO16-B-40.5no routeETCS throttle clutch + (CL+)—
W40OEM-E6-15EMUPRO16-C-310.5no routeAccelerator pedal 1 (VPA)—
W41OEM-E6-23EMUPRO16-C-180.5no routeThrottle position 1 (VTA)—
W42OEM-E6-16EMUPRO16-C-320.5no routeAccelerator pedal 2 (VPA2)—
W43OEM-E6-24EMUPRO16-C-110.5no routeThrottle position 2 (VTA2)—
W44OEM-E6-14EMUPRO16-C-330.5no routeCoolant temperature (THW)—
W45OEM-E3-10EMUPRO16-B-50.5no routeEFI main relay control (MREL)—
W46OEM-E3-4EMUPRO16-B-60.5no routeFuel pump relay (FPR)—
W47OEM-E4-13EMUPRO16-B-70.5no routeA/C clutch relay (ACMG)—
W48OEM-E2-25EMUPRO16-B-130.5no routeO2 heater right rear (HTR2)—
W49OEM-E2-26EMUPRO16-A-250.5no routeO2 heater left rear (HTL2)—
W50OEM-E6-3EMUPRO16-C-10.5no routeO2 heater right front (HTR)—
W51OEM-E6-4EMUPRO16-C-20.5no routeO2 heater left front (HTL)—
W52OEM-E3-5EMUPRO16-C-30.5no routeFuel pump control (FC)—
W53OEM-E3-6EMUPRO16-D-130.5no routeCheck-engine lamp (W)—
W54OEM-E5-12EMUPRO16-D-190.5no routeCanister close valve (CCV)—
W55OEM-E6-7EMUPRO16-D-260.5no routeEVAP purge VSV (PRG)—
W56OEM-E7-5EMUPRO16-D-250.5no routeACIS intake VSV—
W57OEM-E6-10EMUPRO16-C-190.5no routeMass air flow (VG)—
W58OEM-E2-24EMUPRO16-C-340.5no routeO2 right rear (OXR2)—
W59OEM-E4-8EMUPRO16-C-120.5no routeO2 left rear (OXL2)—
W60OEM-E6-11EMUPRO16-D-210.5no routeO2 right front (OXR1)—
W61OEM-E6-12EMUPRO16-C-200.5no routeO2 left front (OXL1)—
W62OEM-E6-22EMUPRO16-D-150.5no routeIntake air temperature (THA)—
W63OEM-E4-18EMUPRO16-C-40.5no routeEVAP vapor pressure (PTNK)—
W64OEM-E5-11EMUPRO16-A-130.5no routeVehicle speed sensor (SP2-)—
W65OEM-E5-5EMUPRO16-A-220.5no routeVehicle speed sensor (SP2+)—
W66OEM-E7-25EMUPRO16-A-140.5no routeIgniter feedback (IGF)—
W67OEM-E4-2EMUPRO16-A-240.5no routeStarter signal (STA)—
W68OEM-E4-5EMUPRO16-A-160.5no routeDiagnostic/timing check (TC)—
W69OEM-E4-6EMUPRO16-A-230.5no routeStop light switch (STP)—

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)60.000ea

ECU setup sheet

RoleEngine refEngine signalSensorECU pointECU functionECU classSetup flag
No configured channels.

Findings

Open (6)

SeverityCodeSubjectMessage
errorREQUIRED_UNMAPPEDOEM-E7-10Required OEM function "Cam position (G2)" (trigger_in) is not connected to the new ECU.
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-E6-14 ↔ EMUPRO16-C-33OEM-E6-14 "Coolant temperature (THW)" [temp_in] is wired to EMUPRO16-C-33 "Precision analog 3" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one.
infoNET_FAMILYOEM-E6-22 ↔ EMUPRO16-D-15OEM-E6-22 "Intake air temperature (THA)" [temp_in] is wired to EMUPRO16-D-15 "Precision analog 6" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one.
infoUNMAPPEDOEM1 optional OEM pins are not mapped: OEM-E3-11 Serial diagnostic (SIL)

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 10: Cam position (G2): no free cam_vr/cam_hall/frequency_in input on ECUMASTER EMU PRO 16 - 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): ECUMASTER EMU PRO 16 has no battery-constant input; not needed - OEM-E3 11: Serial diagnostic (SIL): no free k_line 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
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———