S 600 Sedan (140.057) V12-6.0L (120.982) (1996)
Control Module HVAC: Description and Operation
Idle Speed Increase Via Diode Matrix
Idle Speed Increase Via Diode Matrix
Diode Matrix (V2)
A control voltage from the blower regulator greater than 2.5 volts will increase the engine idle speed via the diode matrix (V2).