Diagnostic Trouble Code (DTC) Information

DTC information
981 3190 Replaced by 9511428 981 3190 Replaced by 951 1428 998 8686 Replaced by 9511532 998 8686 Replaced By 9511532
Condition




Torque from the engine is reduced in some gear changes to allow smoother shifting and to minimize transmission wear. The torque limiting process is controlled by signals (TC1/TC2) sent from the transmission control module (TCM) to the engine control module (ECM). An acknowledgement signal (TCM) is sent from engine control module ECM to the transmission control module (TCM). This signal only indicates that the engine control module (ECM) has received a torque limiting request from the transmission control module (TCM). Diagnostic trouble code (DTC) AT-245 is posted if the transmission control module (TCM) fails to register an acknowledgement signal after a torque limiting request.

Substitute value
The transmission control module (TCM) "Emergency mode II" program is initiated.

Possible source
- Open-circuit in signal cables TC1, TC2 and TCM
- Short-circuit to ground or supply voltage in signal cables TC1, TC2 and TCM
- Contact resistance in terminals

Fault symptom[s]
- The combined instrument panel warning lamp flashes.
- No lock-up function.
- No adaption of the gear slippage times at high altitude (High Altitude Compensation)
- No reduction of system pressure when shifting, making shifting harsher.
- No reduction of system pressure when moving the gear selector between positions P-R, N-R and N-D which causes harsh gear meshing.
- No torque limiting request to engine control module (ECM) when shifting