Trouble Code Conditions

SPECIAL TOOLS
Volvo scan tool No. 998 8686, or equivalent

CONDITION
Lock-up solenoid SL controls the transmission lock-up function. Solenoid SL operates when battery voltage is applied from the Transmission Control Module (TCM) and is activated during different driving conditions depending on road speed, throttle position and the driving mode selected. Diagnostic Trouble Code (DTC) AT-331 is posted if the TCM registers a short-circuit to supply voltage in the solenoid SL circuit when the solenoid should not be activated. Solenoid SL is probably permanently activated.

SUBSTITUTE VALUE
The TCM "Emergency mode 1" program has been initiated.

POSSIBLE SOURCE
Short-circuit to supply voltage in the signal cable.

FAULT SYMPTOM(S)
- Since the solenoid is permanently activated the lock-up function is permanently engaged on 2nd, 3rd and 4th gears.
- Harsh shifting and engine braking on 2nd, 3rd and 4th gears.
- Start fault-tracing at short-circuit to supply. Short Circuit To Supply