Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information TCM-0044

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) increases with decreasing oil temperature. The diagnostic trouble code (DTC) is stored if the transmission control module (TCM) receives too high a signal from the oil temperature sensor for approximately 10 seconds.
The diagnostic trouble code (DTC) can be diagnosed after at least two minutes of normal driving with an engine coolant temperature (ECT) exceeding 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
- Short-circuit to supply voltage in the signal cable
- The oil temperature sensor does not work.

Fault symptom[s]
- General warning lamp lit
- Malfunction indicator lamp (MIL) lit
- Harsh gear shifting.