Funktionslogik laut Elektrik-Leitfaden Defender MY 2002

Zitat
Engine Coolant Temperature Gauge
Fuse 15 of the passenger compartment fuse box (C0580) provides an ignition feed to the engine coolant temperature gauge (C1052) on a WG wire.
Td5
The Engine Control Module (ECM) (C0658) provides a 5 V feed to the Engine Coolant Temperature (ECT) sensor (C0169) on a KG wire.
As coolant temperature increases, the resistance of the sensor decreases. By measuring the resistance of the sensor on a KB wire, the ECM can determine ECT.
The ECM (C0658) then provides a Pulse Width Modulated (PWM) ECT signal to the gauge on a GU then LGU wire. The gauge (C1052) is earthed on a B wire.

WG, KB, LGU wire etc sind die Kabelfarben

B - Black
G - Green
K - Pink
LG - Light green
N - Brown
O - Orange
P - Purple
R - Red
S - Slate (Grey)
U - Blue
W - White
Y - Yellow












Gruß Juergen