Motronic control unit, engine speed sensor, throttle potentiometer (VW Golf 3)

Figure 27. Motronic control unit, engine speed sensor, throttle potentiometer, ignition timing sensor, with VR6 engine:

• G28 - engine speed sensor
• G61 - ignition timing sensor 1
• G62 - coolant temperature sensor
• G66 - ignition timing sensor 11
• J119 - Multifunctional indicator
• J220 - control unit "Monotronic"
• R - radio
• T2a - double plug, near the gearshift lever
• T2b - double plug, near the gearshift lever
• T2c - double plug, near the gearshift lever
• T2d - double plug, above the relay box
• T2z - double plug, under the cover of the switching mechanism
• T3b - triple plug, near the starter
• T3c - triple plug, near the exhaust port
• T3d - triple plug, near the starter
• T8 - 8-pin plug, radio
• T28 - 28-pin plug, in a removable instrument cluster
• T28a - 28-pin plug, to cylinder head, left
• T43 - 43-pin plug, for RPM signal, behind the relay box

Connection points with the body (in circle):

• 15 - ground point, to the cylinder head
• 138 - connection of "mass" (electronics), in the injection device cable
• 139 - connection of "ground" ("ground" of the sensor), in the cable of the injection device
• H20 - connection 1, in the diagnostic system cable
• H21 - connection 2, in the diagnostic system cable

Cable color designations:

• ws - white
• sw - black
• ro - red
• br brown
• gn - green
• gr - gray
• li - purple
• ge - yellow
• bl - blue

List of fuses:

• 30A - green color
• 25A - white
• 20A - yellow
• 15A - blue
• 10A - red