TCU Code 3 - Coolant Sensor
- Check for open or short circuit in CTS or harness. Check that continuity exists between TCU harness pin No. 10 and pin No. 106 at CTS connector, and pin No. 21 and pin No. 109. See Fig 1 .
- Check CTS. If resistance values are incorrect, replace CTS. See COOLANT TEMPERATURE SENSOR SPECIFICATIONS table.
COOLANT TEMPERATURE SENSOR SPECIFICATIONS
| Temperature | Ohms Resistance |
|---|---|
| 68°F (20°C) | 2210-2690 |
| 86°F (30°C) | 1570-1730 |
| 140°F (60°C) | 550-610 |