This is the 34-pin main connector on the Elite 1000. The 26-pin connector carries the rest of the ECU's connections, and the Elite 1000 overview shows how the two fit together. Wire colors use Haltech's abbreviations (for example, L is blue, V is violet, BR is brown). Check the wire color legend if one isn't obvious.
Power and grounds: get these right first
| Pin | Wire | Circuit | Notes |
|---|---|---|---|
| 10 | B | Battery ground | Run to the battery negative post |
| 11 | B | Battery ground | Also to the battery negative post |
| 13 | P | 12V ignition input | Live with the key in run and while cranking only |
| 26 | R/L | ECU injector power input | 12V from the injector power relay. The ECU will not run without it |
| 9 | O | +5V sensor supply | 100 mA maximum |
| 12 | O/W | +8V supply | 100 mA maximum |
Haltech lists pin 26 as a required connection for the ECU to operate. It has to see 12V from the injector power relay, so if an Elite 1000 won't come to life, check for a dead relay, blown fuse or missing feed here early. Our engine control relay article covers the relay side.
Injectors
All four injector drivers are current controlled, up to 8 A peak and 2 A hold, so they can drive both high and low impedance injectors. See fuel injectors for wiring advice.
| Output | Pin | Wire |
|---|---|---|
| INJ 1 | 19 | L |
| INJ 2 | 20 | L/B |
| INJ 3 | 21 | L/BR |
| INJ 4 | 22 | L/R |
Ignition
Four ignition outputs, each rated to 1 A. These are trigger signals for an igniter or a coil with a built-in igniter, not coil drivers. Our ignition output article explains why.
| Output | Pin | Wire |
|---|---|---|
| IGN 1 | 3 | Y/B |
| IGN 2 | 4 | Y/R |
| IGN 3 | 5 | Y/O |
| IGN 4 | 6 | Y/G |
Digital pulsed outputs (DPOs)
Each DPO switches to ground and handles up to 1 A. They differ in the pullup built into them, which matters if you're sending a signal to another device rather than switching a relay.
| Output | Pin | Wire | Pullup | Typical use |
|---|---|---|---|---|
| DPO 1 | 18 | V/B | User definable | General purpose |
| DPO 2 | 1 | V/BR | Fixed to 5V | General purpose |
| DPO 3 | 23 | V/R | Fixed to 12V | General purpose |
| DPO 5 | 24 | B/Y | Fixed to 12V | Fuel pump relay trigger |
| DPO 6 | 25 | B/R | Fixed to 12V | Engine control relay (ECR) output |
Whatever you switch, stay under 1 A. Anything hungrier, like a pump or fan, goes through a relay.
Stepper outputs
Pins 31 to 34 (wires G, G/B, G/BR and G/R) are Stepper 1 phases P1 to P4. These are high and low side drivers that can source or sink up to 1 A. They're designed to drive an idle stepper motor, and any you don't need for that can be used as extra DPOs. More detail is on our stepper outputs page.
Analog inputs (AVIs)
Each AVI reads a 0 to 5V signal and has a 1k pullup you can switch on in software. Turn the pullup on for two-wire temperature sensors and leave it off for powered sensors.
| Input | Pin | Wire | Default use |
|---|---|---|---|
| AVI 2 | 16 | O/B | Spare |
| AVI 3 | 17 | O/R | Spare |
| AVI 4 | 2 | O/Y | Spare |
| AVI 9 | 15 | Y | MAP sensor |
| AVI 10 | 14 | W | Throttle position |
Unused pins
Pins 7, 8 and 27 through 30 have no connection on this plug.
Common questions
Can I power a sensor from the 8V supply?
Only if the sensor is designed for it, and only within the 100 mA limit shared by whatever else is on that pin. Most automotive sensors want 5V.
Why does the ECU need both pin 13 and pin 26?
Pin 13 tells the ECU the key is on. Pin 26 is the 12V feed from the injector power relay. The Elite needs both before it will run the engine.
Need the connector face diagram? Ask us and we'll send it over with advice for your build.
