Written by Hawaiian Hardbody

Turn the ignition switch ON.

Turn the dial on the ECM fully clockwise. After the LED flashes 4 times, turn the dial fully counter clockwise.

Make sure RED LED is turned off.

Make sure RED LED turns on when depressing the gas pedal. If not, check or replace the Throttle Position Sensor.

Make sure RED LED turns on when turning the ignition key the START position. If not, check or replace the starter.

Drive the vehicle with ECM unbolted and within view. Make sure the GREEN LED turns on when speed is 12 MPH or more. If not, check or replace the Vehicle Speed Sensor.