Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information
998 8686 Replaced by 9511532 998 8686 Replaced By 9511532
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. The diagnostic trouble code (DTC) AT-341 is set if the control module detects a difference between the engine rpm and the transmission rpm in excess of 100 rpm, even though the lock-up function is activated.

Substitute value
The transmission control module (TCM) "Emergency mode I"program has been initiated.

Possible source
- Contact resistance in the terminals.
- Mechanical fault in the transmission.

Fault symptom[s]
- The warning lamp in the combined instrument panel flashes.
- Mechanical faults. A noise or some obvious mechanical fault is the most common indication of a mechanical malfunction in the transmission.
- No lock-up function.
- No adaptation of the gear slippage times at high altitude (High Altitude Compensation).