Diagnostic Trouble Code (DTC) Information TCM-0123

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

Condition

Fig 1: Identifying Lock-Up Solenoid, SLU

Courtesy of VOLVO CARS CORPORATION

The solenoids are controlled by power stages in the transmission control module (TCM). The transmission control module (TCM) opens the power stages to activate the solenoids and sends a voltage through the circuit.

The diagnostic trouble code (DTC) is stored if the transmission control module (TCM) registers that the measured current value is higher than the value permitted in the circuit for solenoid SLU.

The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.

Substitute Value

Emergency program Emergency mode 1 in the transmission control module (TCM) has been initiated
The transmission control module (TCM) sends a signal regarding a torque limitation of 150 Nm to the engine control module (ECM) to avoid slipping lock-up.

HINT: EMERGENCY MODE IN THE EVENT OF A FAULT

Possible Source

Short-circuit to supply voltage in the cable
The linear pressure solenoid does not work
Internal fault in the transmission control module (TCM).

Fault symptom[s]

General warning lamp lit
Malfunction indicator lamp (MIL) lit
Abnormal slipping gear shifting
Harsh gear shifting
No shifting.