Motronic control unit, speed and knock sensor I and II
G40 - Hall speed sensor;
G61 - knock sensor I;
G66 - knock sensor II;
J220 - system control unit "Motronic";
N79 - heating resistor for heating the crankcase ventilation system (for vehicles with special equipment);
T2j - two-pin plug connector, on a heating resistor for heating the crankshaft crankcase ventilation system;
T3i - three-pin plug connector, on the speed sensor;
T3m - three-pin plug connector, on knock sensor I;
T3n - 3-pin connector, on knock sensor II;
T28a - 28-pin plug connector on the control unit "Motronic";
T52a - 52-pin connector on the control box "Motronic";
10 - connection point on "mass" in a waterproof casing;
85 - connection on "mass" in the engine wiring harness;
D141 - connection (5V) in the engine wiring harness;
D142 - connection in the engine wiring harness;
* - only for cars with manual transmission;
*** - cars with special equipment
The structure of circuit diagrams of electrical equipment is located here →
Symbols found in circuit diagrams are here →
Explanations for the symbols found in the wiring diagrams are here →