Engine torque
| Engine torque |
The actual air mass/combustion is converted to torque, unit Nm. This information is sent continuously on a bus and TCM uses the information to control the system pressure.
Diagnostics
In the event of a malfunction, a diagnostic trouble code will be generated primarily in the Trionic system.When bus communication with Trionic ceases, diagnostic trouble code P1921 will be generated and the transmission goes into Limp-home mode.
Inaccurate information on the bus causes diagnostic trouble code P1971 to be generated. Depending on the fault, the TCM may activate the emergency operation program (Limp-Home mode).
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