Diagnostic Trouble Code (DTC) Information TCM-0045
Condition
The oil temperature sensor transmits a signal to the transmission control module (TCM) which is used for various functions, such as temperature controlled lock-up and the initiation of high-temperature programs. The sensor has an NTC (negative temperature coefficient) resistor. The signal (voltage) decreases with increasing oil temperature. The diagnostic trouble code (DTC) is stored if the transmission control module (TCM) receives a signal from the oil temperature sensor which has not changed after the engine has run for 10 minutes.
The diagnostic trouble code (DTC) can be diagnosed after at least two minutes of normal driving in gear position D, 4, 3, 2 or geartronic (MAN) and with an engine coolant temperature (ECT) at start up of more than 70 °C or a transmission fluid temperature of more than 50 °C.
Substitute Value
- The transmission control module (TCM) assumes an oil temperature of 30 °C for the first 15 minutes and thereafter 111 °C
- Blocking lock-up
- Blocking slipping lock-up
- Blocking of neutral check.
Possible Source
- Contact resistance in the terminals
- The oil temperature sensor does not work.
Fault symptom[s]
- General warning lamp lit.