ECU spec · AEM

AEM Infinity Series 7 pinout and specs

Checked against the maker's documents 27 September 2026

AEM Infinity Series 7 is a 129-pin wire-in AEM ECU on 2 connectors: C1 (73 pins) and C2 (56 pins).

It has 12 injector outputs and 10 ignition outputs. Injector drive is selectable between peak-and-hold and saturated, so injector impedance is not the constraint here. The ignition outputs are logic-level. Smart coils plug straight in; dumb coils need an igniter in between.

There are 8 dedicated trigger inputs; the maker does not say which sensor type. Two knock inputs cover both banks of a V engine. It has 2 onboard wideband controllers, so a sensor wires straight in.

It has H-bridge outputs labelled for an electronic throttle, so drive-by-wire runs from the ECU itself. Two CAN buses handle dashes, PDMs and expansion. Three outputs can switch 12V as well as ground.

Spec sheet

ConnectorsC1 (73), C2 (56)129 pins in this profile
Injector outputs12peak-and-hold or saturated, selectable
Ignition outputs10logic-level: smart coils, or an igniter for dumb coils
Dedicated trigger inputs8sensor type not stated
Knock inputs2
Onboard wideband controllers2
Onboard MAP sensorNot listed by the maker
CAN buses2
Drive-by-wireYes
High-side outputs3
Half-bridge outputs8H-bridge pairs for a throttle motor or stepper
5V sensor supply5 pins

Worth knowing

  • Infinity-712 (injectors 11 and 12 are 712 only).
  • AEM lists 2 CAN buses but marks CAN B as reserved in the pinout.

Which builds it suits

Of the 58 swap presets in the planner, 28 fit as they are and 29 fit with add-ons; 1 does not fit at all. The add-on it asks for most often is an external igniter. Where it falls short, it is usually not enough knock inputs. The planner fills anything a preset leaves open with its ordinary defaults, so your own build may land differently.

It runs the GM LS LQ4/LQ9 (Gen3 6.0 iron), Nissan RB25DET non-Neo S2 (R33, smart coils), Nissan VQ35HR (High-Rev, 2007+) and Subaru EJ/FA FA20D (BRZ/86 NA) presets with nothing added. The Ford Coyote 5.0 Gen3 (2018-23) needs an external igniter. The Subaru EJ/FA FA20DIT (WRX turbo 2015+) needs a direct-injection driver module. It can't run the BMW S54 (3.2 NA I6, E46 M3): not enough knock inputs.

Fits as it is 28
Fits with add-ons 29
Does not fit 1

Plan a build around the AEM Infinity Series 7

Pin table

By connector: C1 carries 6 injector outputs, 6 ignition outputs and 6 trigger inputs; C2 carries 6 injector outputs, 4 ignition outputs and 2 trigger inputs.

Show all 129 pins
PinFunction
C1 C1-1Lowside 4 (4A)
C1 C1-2Lowside 5 (4A)
C1 C1-3Lowside 6 (4A)
C1 C1-4UEGO 1 Heat
C1 C1-5UEGO 1 IA
C1 C1-6UEGO 1 IP
C1 C1-7UEGO 1 UN
C1 C1-8UEGO 1 VM
C1 C1-9Flash Enable (10K pulldown)
C1 C1-10Battery Perm Power
C1 C1-11Coil 4
C1 C1-12Coil 3
C1 C1-13Coil 2
C1 C1-14Coil 1
C1 C1-15Coil 6
C1 C1-16Coil 5
C1 C1-17Lowside 2 (4A)
C1 C1-18Lowside 3 (4A)
C1 C1-19Analog Sensor Ground
C1 C1-20Analog Sensor Ground
C1 C1-21Crankshaft Position Sensor Hall
C1 C1-22Camshaft Position Sensor 1 Hall
C1 C1-23Digital 2
C1 C1-24Digital 3
C1 C1-25Digital 4
C1 C1-26Digital 5
C1 C1-27Knock Sensor 1
C1 C1-28Knock Sensor 2
C1 C1-29EFI Main Relay Switched Ground Output (0.7A)
C1 C1-30Battery Ground
C1 C1-31CANL A
C1 C1-32CANH A
C1 C1-33Lowside 1 (4A)
C1 C1-34Lowside 0 (4A)
C1 C1-35Analog 7 (default primary TPS)
C1 C1-36Analog 8 (default MAP)
C1 C1-37Analog 9 (default fuel pressure)
C1 C1-38Analog 10
C1 C1-39Analog 11
C1 C1-40Analog 12
C1 C1-41+5V Sensor Power (regulated, fused)
C1 C1-42+5V Sensor Power (regulated, fused)
C1 C1-43Highside 1 (0.7A solid-state relay)
C1 C1-44Highside 0 (0.7A solid-state relay)
C1 C1-45Crankshaft Position Sensor VR+
C1 C1-46Crankshaft Position Sensor VR-
C1 C1-47Camshaft Position Sensor 1 VR-
C1 C1-48Camshaft Position Sensor 1 VR+
C1 C1-49VR+ 2
C1 C1-50VR- 2
C1 C1-51VR- 3
C1 C1-52VR+ 3
C1 C1-53DBW1 Motor - (5A H-bridge)
C1 C1-54DBW1 Motor + (5A H-bridge)
C1 C1-55Battery Ground
C1 C1-56Injector 6
C1 C1-57Injector 5
C1 C1-58Injector 4
C1 C1-59Injector 3
C1 C1-60Battery Ground
C1 C1-61Main Relay Power Input (12V)
C1 C1-62Injector 2
C1 C1-63Injector 1
C1 C1-64Main Relay Power Input (12V)
C1 C1-65Ignition Switch (10K pulldown)
C1 C1-66Analog Temp 1 (default coolant)
C1 C1-67Analog Temp 2 (default air)
C1 C1-68Analog Temp 3 (default oil)
C1 C1-69Stepper 2A (±1.4A)
C1 C1-70Stepper 1A (±1.4A)
C1 C1-71Stepper 2B
C1 C1-72Stepper 1B
C1 C1-73Battery Ground
C2 C2-1DBW2 Motor + (5A H-bridge)
C2 C2-2DBW2 Motor - (5A H-bridge)
C2 C2-3Battery Ground
C2 C2-4Injector 7
C2 C2-5Injector 8
C2 C2-6Injector 9
C2 C2-7Injector 10
C2 C2-8Battery Ground
C2 C2-9Main Relay Power Input (12V)
C2 C2-10Injector 11
C2 C2-11Injector 12
C2 C2-12Analog 17 (default A/C request)
C2 C2-13Analog 18 (default DBW APP1)
C2 C2-14Analog 19 (default DBW APP2)
C2 C2-15Analog Temp 4 (default charge-out)
C2 C2-16Analog Temp 5 (default airbox)
C2 C2-17Analog Temp 6 (default fuel)
C2 C2-18Analog 13 (default oil pressure)
C2 C2-19Analog 14
C2 C2-20Analog 15 (default exhaust backpressure)
C2 C2-21Analog 16 (default DBW1 TPSB)
C2 C2-22+5V Sensor Power (regulated, fused)
C2 C2-23+5V Sensor Power (regulated, fused)
C2 C2-24+5V Sensor Power (regulated, fused)
C2 C2-25VR+ 5
C2 C2-26VR- 5
C2 C2-27VR- 4
C2 C2-28VR+ 4
C2 C2-29Lowside 9 (4A, 12V pull-up)
C2 C2-30Analog Sensor Ground
C2 C2-31Analog Sensor Ground
C2 C2-32Analog Sensor Ground
C2 C2-33Analog 20
C2 C2-34Analog 21 (default 3-step enable)
C2 C2-35Analog 22
C2 C2-36Analog 23 (default charge-out pressure)
C2 C2-37Digital 6 (12V switch input)
C2 C2-38Digital 7 (12V switch input)
C2 C2-39Battery Ground
C2 C2-40Battery Ground
C2 C2-41CanH B (not used)
C2 C2-42CanL B (not used)
C2 C2-43Lowside 8 (4A, 12V pull-up)
C2 C2-44Lowside 7 (4A)
C2 C2-45UEGO 2 VM
C2 C2-46UEGO 2 UN
C2 C2-47UEGO 2 IP
C2 C2-48UEGO 2 IA
C2 C2-49UEGO 2 HEAT
C2 C2-50Battery Perm Power
C2 C2-51Coil 7
C2 C2-52Coil 8
C2 C2-53Coil 9
C2 C2-54Coil 10
C2 C2-55Highside 2 (0.7A solid-state relay)
C2 C2-56Not used

Other AEM ECUs

The closest AEM unit is the AEM Infinity Series 5. Against it, this one has 12 injector outputs (the Infinity Series 5 has 8), 10 ignition outputs (the Infinity Series 5 has 8), 2 wideband controllers (the Infinity Series 5 has 1) and 129 pins (the Infinity Series 5 has 80).

Source: AEM document techlibrary_hardware-specification-infinity-series-7

Always verify against the manufacturer's manual and your tuner before wiring.

Related guides

Guide 01 · Choose & select

How to Choose a Standalone ECU for Your Engine Swap: A Practical Framework

A builder's framework for choosing a standalone ECU for an engine swap: define the build, count the I/O it actually needs, then shortlist. No…

Read the guide → Guide 05 · Choose & select

Reading an ECU Spec Sheet: Injector Drivers, Ignition Outputs, and What Actually Matters

Decode a standalone ECU spec sheet: injector driver types, ignition output modes, analog vs digital inputs, 5V refs and CAN – what to actually…

Read the guide → Guide 06 · Choose & select

Matching an ECU to Your Engine’s I/O: Counting Inputs and Outputs Before You Buy

A worked method for tallying the injectors, coils, sensors and actuators your engine needs against what an ECU provides – and where swaps get…

Read the guide →