Operation CHARM: Car repair manuals for everyone.
Home >> Volvo >> 1998 >> S70 GL L5-2.4L VIN 55 B5254S >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> Manufacturer Code Charts >> AT / DTC Codes (Transmission Control Module) >> AT-341 Lock-Up Function >> Trouble Code Conditions
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

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


pro multis · About Operation CHARM