Transmission Temperature Sensor

Fig 1: Cutaway View Of Transmission Temperature Sensor

Courtesy of DAIMLERCHRYSLER CORP.

The temperature of the transmission oil has a considerable effect on the shifting time and therefore the shift quality. By measuring the oil temperature, shift operations can be optimized in all temperature ranges. The transmission oil temperature sensor (1) is switched in series with the park/neutral contact. The temperature signal is transferred to the TCM only when the dry-reed contact of the park/neutral contact is closed in REVERSE or a forward gear position. See Fig 1.

Fig 2: Transmission Temperature Sensor Specifications

Courtesy of DAIMLERCHRYSLER CORP.

Refer to the Transmission Temperature Sensor Specifications table for the relationship between transmission temperature, sensor voltage, and sensor resistance. See Fig 2.