Discovery II
SUNROOF
DESCRIPTION AND OPERATION
76-6-7
Front sunroof motor and microswitch
The front sunroof motor is located within the front sunroof assembly. The sunroof ECU controls the front sunroof
motor.
The sunroof ECU determines the direction the sunroof motor runs. A battery signal to one side of the motor and an
earth to the other side of the motor causes the motor to turn in one direction, reversing the polarity through the same
pins causes the motor to turn in the opposite direction.
The following table lists the values which can be measured at the listed ECU pins when the conditions outlined are
met:
Signal values (connector connected)
Connector/Pin
No.
Condition
Voltage
Resistance, ohms
C0785-5
Ignition in position II, rear of front sunroof switch
pressed
+voltage to C0785-
5
C0785-1
Ignition in position II, front of front sunroof switch
pressed
+voltage to C0785-
1
< 0.5
C0784-8
Ignition in position II, sunroof fully closed
+V Batt
C0784-8
Ignition in position II, sunroof not closed
> 10,0000