Diagnostic Trouble Code (DTC) Information TCM-0087

WARNING: This page is about a different variant/trim than selected.

Condition

Fig 1: Identifying Transmission Input Speed Sensor

Courtesy of VOLVO CARS CORPORATION

The transmission speed signal is transmitted by a sensor on the transmission. The transmission control module (TCM) uses the signal to determine the input shaft speed after the torque converter. This signal is used to compare the transmission speed with vehicle speed. The transmission control module (TCM) uses this comparison to calculate the gear-shift timing. The rpm and road speed data are also utilized in modulating the system pressure and in reducing engine torque when shifting gear. The result is smooth gear-shifting. The information is also used to control the lock-up function. The diagnostic trouble code (DTC) is stored if the control module registers that the voltage in the circuit to the engine speed (RPM) sensor is too high.

The diagnostic trouble code (DTC) can be diagnosed during normal driving.

Substitute Value

Emergency program Emergency mode 1 in the transmission control module (TCM) has been initiated.
HINT: EMERGENCY MODE IN THE EVENT OF A FAULT

Possible Source

Short-circuit to supply voltage in the engine speed (RPM) sensor power supply
The transmission speed sensor does not function
Internal fault in the transmission control module (TCM).

Fault symptom[s]

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