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Symptom: P1799-CALCULATED OIL TEMP IN USE When Monitored and Set Condition: P1799-CALCULATED OIL TEMP IN USE When Monitored: Whenever the engine is running. Set Condition: The DTC will set if any of the three conditions are present. Thermistor voltage (Transmission Temperature Sensor) out of range. Continuous erratic thermistor POSSIBLE CAUSES INTERMITTENT WIRING & CONNECTORS SPEED SENSOR GROUND CIRCUIT OPEN TRANSMISSION TEMPERATURE SENSOR SIGNAL CIRCUIT OPEN TRANSMISSION TEMPERATURE SENSOR SIGNAL CIRCUIT SHORT TO GROUND SPEED SENSOR GROUND CIRCUIT SHORT TO VOLTAGE TRANSMISSION TEMPERATURE SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE TRANSMISSION TEMPERATURE SENSOR - INOPERATIVE TCM - TRANSMISSION TEMPERATURE SENSOR HIGH TCM - TRANSMISSION TEMPERATURE SENSOR LOW TEST ACTION APPLICABILITY 1 NOTE: Low fluid level can be the cause of many transmission problems. If t, read the engine DTC’s. Check and repair all engine DTC’s prior to performing transmission symptom diagnostics. t, read Transmission DTC’s. Record all DTC’s and 1 Trip Failures. NOTE: Diagnose 1 Trip Failures as a fully matured DTC. 45RFE AUTO TRANS Continue 207 TRANSMISSION |