Pinout

MaxxECU V1 pinout

Every pin of the 48-pin connector, with the wire colours of MaxxECU's harness. Tap a pin to see what it does.

Every pin checked against 2 MaxxECU documents
48-pin connectorLooking into the plug's mating face, cavity letters as Molex (the plug's maker) prints them
A1A2A3A4B1B2B3B4C1C2C3C4D1D2D3D4E1E2E3E4F1F2F3F4G1G2G3G4H1H2H3H4J1J2J3J4K1K2K3K4L1L2L3L4M1M2M3M4

Pick any pin on the drawing or in the table to see its function, its wire colour and the documents it was checked in.

MaxxECU V1 48-pin connector pinout

Mating connector: Molex 643203311

PinFunctionWireMaxxECU note
A1GP OUT 5green
A2IGNITION CYL 1blue
A3IGNITION CYL 2blue
A4TACH/GP OUT 8green660ohm pullup
B1GP OUT 6green
B2IGNITION CYL 3blue
B3IGNITION CYL 4blue
B4GP OUT 1green
C1GP OUT 7green
C2IGNITION CYL 5blue
C3IGNITION CYL 6blue
C4GP OUT 2green
D1WBO2 HTR PIN 4green
D2IGNITION CYL 7blue
D3IGNITION CYL 8blue
D4GP OUT 3green
E1CAN Hgrey
E2CAN Lpink
E3SHIELD GNDblack/white
E4GP OUT 4green
F1COOLANT SENSORblack
F2AIR TEMP SENSORblack
F3WBO2 COMyellow
F4WBO2 VS/02 INbrown
G15V SENSOR SUPPLYred(peak 0.5A, max 150mA)
G2THROTTLE SENSORblack
G3WBO2 IPwhite
G4WBO2 RCALgreen
H1SENSOR GNDbrown
H2VR GNDbrown
H3TRIGGERwhite
H4HOME/CAMwhite
J1ANALOG IN 1, TEMPblack
J2ANALOG IN 2, TEMPblack
J3ANALOG IN 3, 0-5Vblack
J4ANALOG IN 4, 0-5Vblack
K1INJECTOR CYL 1grey
K2INJECTOR CYL 2grey
K3DIGITAL IN 1black
K4DIGITAL IN 2black
L1INJECTOR CYL 8grey
L2INJECTOR CYL 7grey
L3INJECTOR CYL 6grey
L4ENGINE GROUND-
M1INJECTOR CYL 3grey
M2INJECTOR CYL 4grey
M3INJECTOR CYL 5grey
M412V ECUred

MaxxECU V1 pins at a glance

Which pins are CAN on the MaxxECU V1?
CAN H: pin E1 (grey). CAN L: pin E2 (pink).
Which pins are the crank and cam inputs on the MaxxECU V1?
VR GND: pin H2 (brown). TRIGGER: pin H3 (white). HOME/CAM: pin H4 (white).
Which pins are the injector outputs on the MaxxECU V1?
INJECTOR CYL 1: pin K1 (grey). INJECTOR CYL 2: pin K2 (grey). INJECTOR CYL 8: pin L1 (grey). INJECTOR CYL 7: pin L2 (grey). INJECTOR CYL 6: pin L3 (grey). INJECTOR CYL 3: pin M1 (grey). INJECTOR CYL 4: pin M2 (grey). INJECTOR CYL 5: pin M3 (grey).
Which pins are the ignition outputs on the MaxxECU V1?
IGNITION CYL 1: pin A2 (blue). IGNITION CYL 2: pin A3 (blue). IGNITION CYL 3: pin B2 (blue). IGNITION CYL 4: pin B3 (blue). IGNITION CYL 5: pin C2 (blue). IGNITION CYL 6: pin C3 (blue). IGNITION CYL 7: pin D2 (blue). IGNITION CYL 8: pin D3 (blue).
Which pins are ground on the MaxxECU V1?
SENSOR GND: pin H1 (brown). ENGINE GROUND: pin L4.
Which pins power the MaxxECU V1?
12V ECU: pin M4 (red).
Which pins are the sensor supplies on the MaxxECU V1?
5V SENSOR SUPPLY: pin G1 (red).
Which pins are the wideband sensor connections on the MaxxECU V1?
WBO2 HTR PIN 4: pin D1 (green). WBO2 COM: pin F3 (yellow). WBO2 VS/02 IN: pin F4 (brown). WBO2 IP: pin G3 (white). WBO2 RCAL: pin G4 (green).

MaxxECU V1 pinout sheet

A printable sheet with the connector drawings and every pin, made from the checked data on this page.

Download PDFDownload diagram (PNG)
MaxxECU V1 pinout diagram with wire colours

Where this comes from

Only MaxxECU's own documents. Pin names and notes are written exactly as MaxxECU writes them.

How we checked it

  • We start from MaxxECU's pinout table for this ECU.
  • We read every pin again from a second MaxxECU document, the wiring diagram or the quick start guide. A script compares the two, pin by pin.
  • A pin is only shown when its function and its wire colour match in both. Where a diagram has no text to read, we read the pins off the drawing itself.
  • The notes are MaxxECU's own words from its pinout table.

ECU Recovery is not affiliated with MaxxECU. MaxxECU and its product names are trademarks of MaxxECU. If your harness came with its own diagram, check your wiring against it.

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