Connecting COMPUSHIFT to Aces EFI

Overview

This guide provides details on setting up a COMPUSHIFT controller with a Aces EFI.

The two control systems are connected together using CAN bus, and signals like throttle position and engine speed are automatically transferred between the two units. No other connection is required.

Setup Instructions

1. Ensure that both the COMPUSHIFT and Aces EFI are powered by the same switched ignition power.

2. Connect the HGM CAN-19 cable between the Aces EFI and the Aces display.

3. Connect the gray Deutsch connector on the CAN-19 cable to CAN bus connector on the COMPUSHIFT controller harness.

4. Turn on the key, but do not start the engine.

5. On the COMPUSHIFT Setup app and navigate to the “Vehicle Setup” menu.

6. Ensure that the transmission type is set correctly.

7. Set the engine type on the COMPUSHIFT controller to “Aces EFI CAN”.

8. Navigate to the dashboard on the setup app or handheld display.

9. Start the engine. Confirm that the engine speed and throttle position are reading correctly on the display.

Do NOT drive the vehicle until you have confirmed CAN communications are working properly and you have no trouble codes.

You can diagnose CAN bus problems by going to Diagnostics / Network Diagnostics on the CS Setup App. The CAN 1 Receive Count should be steadily increasing when the ECU’s are communicating correctly. The error counts should always be 0. If you do have errors, confirm that the CAN bus baud rate is set to 500 in Network Setup.

CAN bus networks require termination resistors at both ends. On the Aces system, termination is provided in the EFI and the display, so both devices should be connected to the CAN bus all times. Failure to keep the display connected may result in CAN bus errors on the COMPUSHIFT controller. If you need to remove the display, HGM can provide an alternative termination solution.