Function Diagram, Electronic Diesel System (EDS)

1 Injection pump
2 Governor
60 EGR valve
61a Orifice
61b Orifice 0.5
61c Orifice 0.7
62 Filter
62a Filter
65 Vacuum control valve
67 Vacuum pump
72 Vacuum damper
103 Aneroid compensator (ALDA)
110 Exhaust manifold
137 Turbocharger
137a Boost pressure control valve vacuum actuator
138 Intake manifold
224 Accelerator pedal
B2/1 Air flow sensor
62/1a Intake air temperature sensor
B5/1 Pressure sensor (EDS)
B11/4 Coolant temperature sensor (EDS)
L3 Starter ring gear speed sensor
L7 Fuel rack position sensor
N39 EDS Control unit
Y22 Electromagnetic actuator, electronic idle speed control (ELR)
Y27 EGR switchover valve
Y31/1 EGR vacuum transducer
V31/4 Boost pressure control vacuum transducer
Y31/6 Boost pressure cut-out switchover valve

A Intake air
B Exhaust gas
a Vent line to passenger compartment
c Remaining vacuum consumers

Pressure and vacuum connections at vacuum transducers
VAC Vacuum from vacuum pump
ATM Vent line to passenger Compartment
OUT from vacuum transducer (Y31/1) to EGR switchover valve (Y27)
OUT from vacuum transducer (Y31/4) to boost pressure control valve vacuum actuator (137a)