TM2361 (24JUN08) 9001-10-55 450DLC Excavator Operation and Tests 062608 PN=79 Main Controller (MCF) Diagnostic Trouble Codes Hydraulic Oil Temperature Sensor Diagnostics Hydraulic oil temperature sensor 0.23 volts or less. Diagnostic trouble code sets when intake air temperature is 21°C (70°F) or higher and sensor voltage is less than 0.23 volts for more than 30 seconds. – – –1/1 9001 10 55 1 Connector Check Check harness connections to hydraulic oil temperature sensor, MCF and between harness. Are connectors clean and free from debris? Are pins straight and make a good connection? YES: Go to Hydraulic Oil Temperature Sensor Check. NO: Repair or replace connector.
See Machine Harness (W2) Wiring Diagram. (Group 9015-10.) – – –1/1 2 Hydraulic Oil Temperature Sensor Check Disconnect hydraulic oil temperature sensor from harness. Check resistance of sensor. Hydraulic Oil Temperature Resistance -20°C 14.6—17.8 kΩ -4° 0°C 5.88 kΩ 32°F 20°C 2.21—2.69 kΩ 68°F 40°C 1.14 kΩ 104°F 60°C 0.54 kΩ 140°F 80°C 0.32 kΩ 176°F Is sensor within specifications? YES: Go to Continuity Check. NO: Hydraulic oil temperature sensor malfunction. Replace sensor. – – –1/1 Hydraulic Oil Temperature Resistance -20°C -4° 14.6—17.8 kΩ 0°C 32°F 5.88 kΩ 20°C 68°F 2.21—2.69 kΩ 40°C 104°F 1.14 kΩ 60°C 140°F 0.54 kΩ 80°C 176°F 0.32 kΩ