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Home >> Volvo >> 2004 >> XC70 >> Repair and Diagnosis >> External Pages >> Different car >> Section 103 (Transmission Control Module (TCM) Vehicle Communication - Specifications) >> Vehicle Communication Information, Transmission Control Module (TCM) (Aw50/51 AWD; Aw55-50/51SN; 2001-2007) >> Description of parameters >> Parameters, value >> TCM output speed sensor, calculated speed
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TCM output speed sensor, calculated speed

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2007 Volvo V70, 2006 Volvo V70, 2005 Volvo V70, 2004 Volvo V70, and 2003 Volvo V70. However, it is still accessible from the selected car via links, so may be relevant.

The control module receives a signal from the gearbox speed sensor which is affected by a toothed pulse wheel and calculates the vehicle speed based on the signal. The speed sensor is an "active" sensor. The signal oscillates between a peak and a trough value. The control module calculates the speed which is directly proportional to the frequency.

Measurement range: 0 km/h - top speed.

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