900 L4-1985cc 2.0L DOHC Turbo EFI (1985)
Engine Control Module: Description and Operation
LH control module (LH 2.2)
The LH control module is located inside the cabin on the right-hand side underneath the dash panel.
All necessary reference data, such as maximum rpm, full-load enrichment, hot wire burn-off, etc., is stored in the control module's memory.
A microprocessor processes the signals from the mass air flow sensor and other sensors, as well as the data from the memory, and calculates the
opening duration of the injectors.
The LH control module also contains auxiliary functions for emitting fixed signals in the event of a break in the signals from the mass air flow sensor
or temperature sensor.:
- Mass air flow sensor: the Limp-Home function.
- Temperature sensor: a simulated signal for an assumed engine temperature of 20°C (68°F).