Pinout

Emtron SL4 pinout

Every pin of the 34-pin A and 34-pin B connectors, with the wire colours of Emtron's harness. Tap a pin to see what it does.

Every pin checked against 2 Emtron documents
Connector A · 34-pinCavity numbers as TE Connectivity, the plug's maker, draws them
12345678910111213141516171819202122232425262728293031323334
Connector B · 34-pinCavity numbers as TE Connectivity, the plug's maker, draws them
12345678910111213141516171819202122232425262728293031323334

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

Emtron SL4 connector A pinout (34-pin)

Mating connector: TE AMP Superseal 1.0 4-1437290-1 (34 Way / Key 2)

PinFunctionWireEmtron note
A1Injection Channel 1Blue
A2Injection Channel 2Blue
A3Injection Channel 3Blue
A4Injection Channel 4Blue
A5Not used-
A6Not used-
A7Not used-
A8Not used-
A9Sensor Supply 8VWhite/Orange
A10Auxiliary Output 1Grey
A11Auxiliary Output 2Grey
A12Auxiliary Output 3Grey
A13Auxiliary Output 4Grey
A14Auxiliary Output 5Grey
A15Auxiliary Output 6Grey
A16Auxiliary Output 7Grey
A17Auxiliary Output 8Grey
A18Auxiliary Output 9Grey
A19Auxiliary Output 10Grey
A20Digital Input 1White
A21Digital Input 2White
A22Digital Input 3White
A23Digital Input 4White
A24Digital Input 5White
A25Digital Input 6White
A26Ignition Channel 1Yellow
A27Ignition Channel 2Yellow
A28Ignition Channel 3Yellow
A29Ignition Channel 4Yellow
A30Not used-
A31Not used-
A32Not used-
A33Not used-
A34Auxiliary Output 9-10, 14V Supply-

Emtron SL4 connector B pinout (34-pin)

Mating connector: TE AMP Superseal 1.0 4-1437290-0 (34 Way / Key 1)

PinFunctionWireEmtron note
B1ECU 14V SupplyRed
B2Sensor Supply Vref1: 5.0V-
B3EFI Relay Output (Low Side 200mA)-
B4Ignition Switch InputRed
B5Crank Index Sensor +-2 core Shielded Cable (shared with B6)
B6Crank Index Sensor --2 core Shielded Cable (shared with B5)
B7Sync Sensor +-2 core Shielded Cable (shared with B8)
B8Sync Sensor --2 core Shielded Cable (shared with B7)
B9Shield (Crank/Sync/ Knock)White
B10Analog Sensor 0V Reference-
B11Analog Input Channel 1White
B12Analog Input Channel 2White
B13Analog Input Channel 3White
B14Analog Input Channel 4White
B15Analog Input Channel 5White
B16Knock 1 +-2 core Shielded Cable (shared with B17)
B17Knock 1 --2 core Shielded Cable (shared with B16)
B18ECU GroundBlack
B19Analog Input Channel 6White
B20Analog Input Channel 7White
B21Analog Input Channel 8White
B22Analog Input Channel 9White
B23Analog Input Channel 10White
B24Knock 2 +-2 core Shielded Cable (shared with B25)
B25Knock 2 --2 core Shielded Cable (shared with B24)
B26ECU GroundBlack
B27CAN 1HWhite
B28CAN 1LGreen
B29Not used-
B30Not used-
B31Ethernet Tx +-
B32Ethernet Tx --
B33Ethernet Rx +-
B34Ethernet Rx --

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Emtron SL4 pins at a glance

Which pins are CAN on the Emtron SL4?
CAN 1H: pin B27 (White). CAN 1L: pin B28 (Green).
Which pins are the crank and cam inputs on the Emtron SL4?
Crank Index Sensor +: pin B5. Crank Index Sensor -: pin B6. Sync Sensor +: pin B7. Sync Sensor -: pin B8.
Which pins are the injector outputs on the Emtron SL4?
Injection Channel 1: pin A1 (Blue). Injection Channel 2: pin A2 (Blue). Injection Channel 3: pin A3 (Blue). Injection Channel 4: pin A4 (Blue).
Which pins are the ignition outputs on the Emtron SL4?
Ignition Channel 1: pin A26 (Yellow). Ignition Channel 2: pin A27 (Yellow). Ignition Channel 3: pin A28 (Yellow). Ignition Channel 4: pin A29 (Yellow).
Which pins are ground on the Emtron SL4?
Analog Sensor 0V Reference: pin B10. ECU Ground: pins B18, B26 (Black).
Which pins power the Emtron SL4?
ECU 14V Supply: pin B1 (Red). Ignition Switch Input: pin B4 (Red).
Which pins are the sensor supplies on the Emtron SL4?
Sensor Supply 8V: pin A9 (White/Orange).

Emtron SL4 pinout sheet

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

Download PDFDownload diagram (PNG)
Emtron SL4 pinout diagram with wire colours

Where this comes from

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

How we checked it

  • We start from Emtron's pinout page for this ECU, on its Resource Centre.
  • Every pin is read again in Emtron's wiring harness specification for the ECU family, which lists each pin with its name, description and wire colour. A script compares them pin by pin.
  • A pin is only shown when both name the same function. A pin the ECU's pinout marks NC is shown as not connected; where the family's harness specification lists something there, the page says so. A wire colour is shown only when a second Emtron harness specification gives the same colour for that pin name.
  • Labels are Emtron's own words from the pinout page; notes are its words from the harness specification.

Where Emtron's documents disagree

B29: Emtron's SL Series wiring harness specification lists CAN 2 HI (Auxiliary CAN) on B29, and Emtron's 2018 ECU comparison sheet gives the SL4 two CAN channels. The SL4 pinout lists the pin as NC (not connected). Shown: not connected, as in the SL4's own pinout.

B30: Emtron's SL Series wiring harness specification lists CAN 2 LO (Auxiliary CAN) on B30, and Emtron's 2018 ECU comparison sheet gives the SL4 two CAN channels. The SL4 pinout lists the pin as NC (not connected). Shown: not connected, as in the SL4's own pinout.

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

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