Diagnostic trouble code (DTC) information

Condition 

Fig 1: Identifying Transmission Speed Sensor

Courtesy of VOLVO CARS OF NORTH AMERICA.

The transmission control module (TCM) calculates the ratio between the torque converter input speed (engine speed RPM) and the transmission speed after the torque converter. Diagnostic trouble code (DTC) TCM-002F is stored if the control module registers a deviation of more than 100 RPM between these two values for approximately 12 seconds despite lock-up being activated.

Substitute Value 

No lock-up function.

Possible Source 

• Contact resistance in terminals.
• Mechanical fault in the transmission.

Fault symptom[s] 

• General orange warning lamp lit.
• Malfunction indicator lamp (MIL) lit.
• No lock-up function.
• Harsh gear shifting.

HINT: Harsh shifting - may be caused by disabled adjustment of gear slippage times at high altitude (High Altitude Compensation).