200 Quattro Wagon L5-2226cc 2.22L SOHC Turbo (MC) (1989)
Ignition Control Module: Description and Operation
The CIS-TURBO engine control system, like the CIS-MOTRONIC system, uses a single electronic control unit (ECU), located behind the A/C
evaporator, to control the fuel delivery and ignition systems. The ECU monitors information from various engine sensors and uses this information,
compared with information stored in its memory, to precisely control the fuel and ignition systems for lower exhaust emissions, better fuel economy and
better engine performance, under all operating conditions.