A6 Quattro Wagon V6-2.8L (AFC) (1995)
Coolant Temperature Sensor/Switch (For Computer): Diagram Information and Instructions
Wiring Diagram Circuit Identification
Wiring Diagram Terminal (circuit) Identification
Several wiring circuits in the vehicle's electrical system are identified with a number or letter designation. These circuits are identified the same in
all wiring diagrams and are most commonly shown near the top of each page in the fuse/relay panel portion of the wiring diagram. The circuit
designations may also be used to identify switch connector terminals (switch circuits). Following are the most common numbered/lettered circuits:
Terminal (circuit):
1
- Ignition coil/ignition distributor low voltage (typically used as an Engine Speed (RPM) signal for the tachometer)
15
- Switched Battery Positive Voltage (B+) from ignition/starter switch
30
- Battery Positive Voltage (B +), hot at all times
31
- Ground (GND)
50
- Starter control; switched B+ from ignition/starter switch
56
- Switched headlight B+ from light switch
58
- Switched parking light, taillight. illumination B+ from light switch
S (SU) - Key In ignition circuit: switched B+ from ignition/starter switch
X
- Load reduction circuit; switched B+ from load reduction relay