R154 ABS Speed Sensor Signal to Standalone ECU - Pull-Up Resistor and Correct Wiring

When trying to use the R154 transmission's ABS speed sensor to feed a vehicle speed signal to a standalone ECU (Vipec, Haltech, Megasquirt, etc.), the ECU receives no signal (0 Hz logged) despite being wired to the sensor.

Two issues: First, the signal and power wires from the R154 ABS sensor were swapped — the white wire is the signal output (not the red wire, which is the 12V power input). Second, the hall effect sensor output requires a pull-up resistor in the circuit for the standalone ECU to read the signal properly.

High confidence — Original poster confirmed this resolved the issue