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Home >> Volvo >> 2000 >> C70 2D Convertible, 2.4 56 >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Transmission Control Module (TCM) Diagnostic Trouble Code (DTC) Diagnostics - 1 Of 3 (Convertible) >> TCM-0024 Input Speed Sensor. Faulty Signal. Permanent Fault (Aw50-42;2000) >> Faulty signal. Permanent fault >> Checking cables and sensors

Checking cables and sensors

Check transmission speed sensor cable for power supply between control module #A59 and transmission connector #16 and between the transmission connector and the speed sensor connector for an open-circuit according to Open-circuit, permanent faults , a short-circuit to ground according to Short-circuit to ground, permanent faults and a short-circuit to supply voltage according to Short-circuit to supply voltage. Permanent faults .

HINT: With control module connected and ignition on, the voltage between connector #1 and ground (breakout box #53) should be approximately 8-12 V. 

Check speed sensor power supply between control module #A41 and automatic transmission connector #17 and between automatic transmission connector #17 and speed sensor connector for an open-circuit according to Open-circuit, permanent faults , a short-circuit to ground according to Short-circuit to ground, permanent faults and a short-circuit to supply voltage according to Short-circuit to supply voltage. Permanent faults .

Remedy as necessary.

Other information: 

Fig 1: Breakout Box
GLL100304Courtesy of VOLVO CARS OF NORTH AMERICA.
Fig 2: Identifying Ohmmeter
GLL101042Courtesy of VOLVO CARS OF NORTH AMERICA.
Fig 3: Identifying Transmission Connector Terminal 16 & 17
GLL125366Courtesy of VOLVO CARS OF NORTH AMERICA.

Was a fault detected?