Discovery II
SUNROOF
76-6-10 DESCRIPTION AND OPERATION
Rear sunroof rear switch
The rear sunroof rear switch is located in the roof console in front of the rear sunroof. It controls the rear sunroof
motor via the sunroof ECU.
The rear sunroof front switch supplies an earth signal through the rear sunroof isolation switch to the sunroof ECU.
The pin at the ECU that receives the earth signal determines whether ECU causes the sunroof to open or close.
TestBook cannot monitor the state of the rear sunroof rear switch.
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
Resistance, ohms
C0784-6
Ignition in position II, rear sunroof isolation switch closed, rear
sunroof rear switch released
> 10,000
C0784-6
Ignition in position II, rear sunroof isolation switch closed, rear
sunroof front switch open
< 0.5
C0785-9
Ignition in position II, rear sunroof isolation switch closed, rear
sunroof front switch released
> 10,000
C0785-9
Ignition in position II, rear sunroof isolation switch closed, rear
sunroof front switch closed
< 0.5