Federal

CIRCUIT DIAGRAM





INSPECTION USING SCAN TOOL








HARNESS INSPECTION PROCEDURE

COMPONENT TEST PROCEDURE
1. Remove engine coolant temperature sensor from the intake manifold.





2. With temperature sensing portion of engine coolant temperature sensor immersed in hot water check resistance.

5.9 K Ohms at 0°C (32°F)
2.4 K Ohms at 20°C (68°F)
1.1 K Ohms at 40°C (104°F)
0.3 K Ohms at 80°C (176°F)

3. If the resistance deviates from the standard value greatly, replace the sensor.

Sensor tightening torque: 20-40 Nm (15-29 ft lb)

4. Fasten harness connectors securely.

TROUBLESHOOTING HINTS
- If, during engine warm-up, the fast-idling speed Is not correct, or black smoke is emitted, the problem is usually a malfunction of the engine coolant temperature sensor.