PRE-RELEASE
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
If the function is faulty a diagnostic trouble code is generated in the engine system.If bus communication with the engine control system has ceased a P1921 diagnostic trouble code is generated, the gearbox goes into the 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 programme (Limp-Home mode).
