No Vehicle Speed Sensor Signal
- Raise and support vehicle. Start engine and place transmission in Drive. Check vehicle speed sensor AC voltage between Purple/White wire and Light Green/Black wire at digital ratio adapter controller. Voltage should change as engine RPM is decreased and increased.
- If there is no vehicle speed sensor AC voltage at these wires, check for an open or short in both wires. If no open or short is found in wires, replace vehicle speed sensor.