Trouble Code Conditions

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

CONDITION
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) AT-341 is posted if the TCM registers a difference of over 100 rpm between the speeds, even though the lock-up function is activated.

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

POSSIBLE SOURCE
- Contact resistance in terminals.
- Mechanical fault in the transmission.

FAULT SYMPTOM(S)
- The combined instrument panel warning lamp flashes.
- Mechanical malfunction.
- Faults are usually indicated by noise or other obvious function problems.
- No lock-up function.
- No adaption of the gear slippage times at high altitude (High Altitude Compensation).

TESTING PROCEDURE
Start fault-tracing at slipping or not engaged page. Slipping Or Not Engaged