MS3Pro ULTIMATE pinout
ecurecovery.com/pinouts/ms3pro/ultimate · Every pin checked against 2 MS3Pro documents · data checked 2026-11-04
MS3Pro ULTIMATE pinout
Every pin of the 35-pin White, 35-pin Gray, and 23-pin Black connectors, with the wire colours of MS3Pro's harness. Tap a pin to see what it does.
Every pin checked against 2 MS3Pro documents- Connector White · 35-pin
- Connector Gray · 35-pin
- Connector Black · 23-pin
MS3Pro's documents list the pins but do not draw the plug, so we do not draw it either.
Pick any pin in the table to see its function and the documents it was checked in.
MS3Pro ULTIMATE connector White pinout (35-pin)
| Pin | Function | Wire |
|---|---|---|
| W1 | High current out 1 | Light green |
| W2 | High current out 2 | Light green / Dark blue |
| W3 | Injector out J | White / Yellow |
| W4 | Injector out I | White / GrayWhite/grey |
| W5 | High current out 3 | Light green / Red |
| W6 | CKP+ | WhiteShielded |
| W7 | Knock In 2 | Orange / Red |
| W8 | 5V+ VREF out 1 | GrayGrey |
| W9 | TPS in | Light blueShielded |
| W10 | MAT in | Orange |
| W11 | CLT in | Yellow |
| W12 | Analog In 6 | Light blue / Dark green |
| W13 | Power ground | - |
| W14 | PWM / Idle Out 1 | Light green |
| W15 | CKP- | BlackShielded |
| W16 | Logic ground | - |
| W17 | Analog In 7 | - |
| W18 | Sensor return | Black / White |
| W19 | Analog in 1 | Light blue / Dark blue |
| W20 | Analog in 2 | Light blue / Red |
| W21 | Analog in 3 | Light blue / Purple |
| W22 | Analog In 4 | Light blue / Pink |
| W23 | Analog In 5 | - |
| W24 | Tach out | Light green / Purple |
| W25 | O2 in | Pink |
| W26 | CMP+ | YellowShielded |
| W27 | CMP- | RedShielded |
| W28 | Fuel pump relay out | Purple |
| W29 | PWM out 2 | Light green / Pink |
| W30 | PWM out 3 | Light green / Dark green |
| W31 | Knock in 1 | Orange / Purple |
| W32 | Digital switched in 1 | Gray / OrangeGrey/orange |
| W33 | CAN L | Tan / Red |
| W34 | CAN H | Tan |
| W35 | 12V+ switched power in | Red |
MS3Pro ULTIMATE connector Gray pinout (35-pin)
| Pin | Function | Wire |
|---|---|---|
| G1 | Injector out A | White |
| G2 | Injector out B | White / Orange |
| G3 | Ground | Black |
| G4 | Injector out C | White / Light green |
| G5 | Ground | Black |
| G6 | Injector out D | White / Pink |
| G7 | Ground | Black |
| G8 | Injector out E | White / Red |
| G9 | Ground | Black |
| G10 | Injector out F | White / Dark green |
| G11 | Injector out G | White / Dark blue |
| G12 | Injector out H | White / Purple |
| G13 | Spark out G | Yellow / Dark blue |
| G14 | Spark out E | Yellow / Red |
| G15 | Spark out C | Yellow / Light green |
| G16 | Spark out H | Yellow / Purple |
| G17 | Digital frequency in 2 | Purple / Red |
| G18 | Ground | - |
| G19 | Digital switched 12V in | Gray / Dark blueGrey/dark blue |
| G20 | Digital switched in 2 | Gray / RedGrey/red |
| G21 | Digital frequency in 3 | Purple / Dark blue |
| G22 | Digital Frequency in 3 VR+ | PurpleShielded |
| G23 | Digital Frequency In 3 VR- | - |
| G24 | Spark out F | Yellow / Dark green |
| G25 | Spark out B | Yellow / Orange |
| G26 | Spark out D | Yellow / Pink |
| G27 | Spark out A | Yellow |
| G28 | Digital frequency in 1 | Purple / White |
| G29 | Digital switched in 3 | Gray / PurpleGrey/purple |
| G30 | Stepper IAC out 1B | Blue / Red |
| G31 | Stepper IAC out 1A | Blue / White |
| G32 | Stepper IAC out 2A | Green / White |
| G33 | Stepper IAC out 2B | Green / Red |
| G34 | Digital Frequency in 1 VR+ | PurpleShielded |
| G35 | Digital Frequency in 1 VR- | WhiteShielded |
MS3Pro ULTIMATE connector Black pinout (23-pin)
| Pin | Function | Wire |
|---|---|---|
| B1 | PWM out 5 | Light green / Red |
| B2 | PWM out 4 | Light green / Orange |
| B3 | Digital out 2 | Brown / Dark blue |
| B4 | Digital out 1 | Brown / Dark green |
| B5 | Digital I/O 4 | Brown / Pink |
| B6 | Digital I/O 2 | Brown / Orange |
| B7 | Analog in 8 | Light blue / Purple |
| B8 | 5V+ VREF out 2 | Gray / BlackGrey/black |
| B9 | Fuel only coil negative | Black / Red |
| B10 | Digital switched in 5 | Gray / OrangeGrey/orange |
| B11 | Digital switched in 4 | Gray / PinkGrey/pink |
| B12 | Digital I/O 5 | Brown / Red |
| B13 | Digital I/O 3 | Brown / Light green |
| B14 | Digital I/O 1 | Brown |
| B15 | 5V+ VREF out 2 | Gray / BlackGrey/black |
| B16 | Fuel only battery 12V+ | Red / Black |
| B17 | Sensor return | Black / White |
| B18 | Sensor return | Black / White |
| B19 | Sensor return | Black / White |
| B20 | Sensor return | Black / White |
| B21 | Sensor return | Black / White |
| B22 | 5V+ VREF out 1 | GrayGrey |
| B23 | Keep alive power | Red / White |
MS3Pro ULTIMATE pins at a glance
- Which pins are CAN on the MS3Pro ULTIMATE?
- CAN L: pin W33 (Tan / Red). CAN H: pin W34 (Tan).
- Which pins are the crank and cam inputs on the MS3Pro ULTIMATE?
- CKP+: pin W6 (White). CKP-: pin W15 (Black). CMP+: pin W26 (Yellow). CMP-: pin W27 (Red). Digital frequency in 2: pin G17 (Purple / Red). Digital frequency in 3: pin G21 (Purple / Dark blue). Digital Frequency in 3 VR+: pin G22 (Purple). Digital Frequency In 3 VR-: pin G23. Digital frequency in 1: pin G28 (Purple / White). Digital Frequency in 1 VR+: pin G34 (Purple). Digital Frequency in 1 VR-: pin G35 (White).
- Which pins are the injector outputs on the MS3Pro ULTIMATE?
- Injector out J: pin W3 (White / Yellow). Injector out I: pin W4 (White / Gray). Injector out A: pin G1 (White). Injector out B: pin G2 (White / Orange). Injector out C: pin G4 (White / Light green). Injector out D: pin G6 (White / Pink). Injector out E: pin G8 (White / Red). Injector out F: pin G10 (White / Dark green). Injector out G: pin G11 (White / Dark blue). Injector out H: pin G12 (White / Purple).
- Which pins are the ignition outputs on the MS3Pro ULTIMATE?
- Spark out G: pin G13 (Yellow / Dark blue). Spark out E: pin G14 (Yellow / Red). Spark out C: pin G15 (Yellow / Light green). Spark out H: pin G16 (Yellow / Purple). Spark out F: pin G24 (Yellow / Dark green). Spark out B: pin G25 (Yellow / Orange). Spark out D: pin G26 (Yellow / Pink). Spark out A: pin G27 (Yellow).
- Which pins are ground on the MS3Pro ULTIMATE?
- Power ground: pin W13. Sensor return: pins W18, B17, B18, B19, B20, B21 (Black / White). Ground: pins G3, G5, G7, G9, G18.
- Which pins power the MS3Pro ULTIMATE?
- 12V+ switched power in: pin W35 (Red).
- Which pins are the wideband sensor connections on the MS3Pro ULTIMATE?
- O2 in: pin W25 (Pink).
MS3Pro ULTIMATE pinout sheet
A printable sheet with every pin, made from the checked data on this page.
Where this comes from
Only MS3Pro's own documents. Pin names and notes are written exactly as MS3Pro writes them.
MS3Pro user manual (AMP EFI): connector pinout tables
MS3Pro wiring pinout card (AMP EFI)
How we checked it
- We start from the connector pinout tables in AMP EFI's user manual for this ECU: pin, function, wire colour and stripe.
- Every pin is read again from AMP EFI's wiring pinout card for the same ECU (a picture: read by OCR, and by eye where OCR could not read a row). A script compares them pin by pin.
- A pin is only shown when both give the same function. A wire colour is shown only when both give the same colour and stripe; where they differ, the page says so and shows no colour.
- Labels are the manual's own words.
Where MS3Pro's documents disagree
W16: AMP EFI's documents give different wire colours: the MS3Pro ULTIMATE manual Black, the pinout card none. No colour is shown.
W17: AMP EFI's documents give different wire colours: the MS3Pro ULTIMATE manual Light blue / Dark blue, the pinout card Green / Orange. No colour is shown.
W23: AMP EFI's documents give different wire colours: the MS3Pro ULTIMATE manual Light blue / Red, the pinout card Blue / Orange. No colour is shown.
G18: AMP EFI's documents give different wire colours: the MS3Pro ULTIMATE manual Black, the pinout card none. No colour is shown.
G23: AMP EFI's documents give different wire colours: the MS3Pro ULTIMATE manual Dark blue / Shielded, the pinout card Blue / Shielded. No colour is shown.
ECU Recovery is not affiliated with MS3Pro. MS3Pro and its product names are trademarks of MS3Pro. If your harness came with its own diagram, check your wiring against it.
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