Diagnostic trouble code (DTC) information

Condition 

Fig 1: Identifying Lock-Up Solenoid, SLU

Courtesy of VOLVO CARS OF NORTH AMERICA.

Lock-up solenoid SL controls the transmission lock-up function and certain gear shifts in the transmission. Solenoid SLU operates when it receives voltage from the transmission control module (TCM) and is activated under different driving conditions depending on road speed, throttle position and the driving mode selected. Diagnostic trouble code (DTC) TCM-0110 is stored if the control module registers a short-circuit to ground in the solenoid SLU circuit when the solenoid should be activated. Solenoid SLU can probably not be activated.

Substitute Value 

• The transmission control module (TCM) does not activate the lock-up solenoid.
• The control module "Limp Home" program has been initiated.

Possible Source 

• Short-circuit to ground in the signal cable.
• Defective control module.
• Defective solenoid.

Fault symptom[s] 

• The automatic transmission warning lamp is lit.
• No shifting.
• Irregular shifting.
• No lock-up function.