Throttle control: Miscellaneous

The system regulates the current air mass/combustion so that it corresponds with the requested value. It is completely normal for the throttle not to be fully open despite the accelerator pedal being fully depressed.
Apart from internal control module faults, all the faults in the throttle control can be located in the throttle body or its leads. The main relay must also supply control module pin 1.
If there is a fault in the supply from the main relay to control module pin 1, main relay trouble code P1640 will be generated, the throttle will close and the engine will stop.
The feel of the accelerator pedal is not affected in limp-home mode.
The system is self-calibrating.

NOTE: A short circuit in the 5V supply will put the system in limp-home mode and may be due to a fault in the wiring harness or in a sensor supplied with 5V.