1) Ensure ignition is OFF.
2) Remove rear of ECU plug cover and insert plug back into ECU.
3) Turn ignition back on (do not start engine)
4) THROTTLE CLOSED:
4x4: Check for DC voltage less than 0.5V between pins 11 and 17.
5) THROTTLE FULLY OPEN:
4x4: Check for DC voltage greater than 4.5V between pins 11 and 17.