SUNROOF (Description): DESCRIPTION AND OPERATION (page 5 of 8)

SUNROOF

DESCRIPTION AND OPERATION

76-6-9

Rear sunroof isolation switch

The rear sunroof isolation switch is located in the roof console above the windscreen in front of the front sunroof.  It 
prevents the rear sunroof rear switch from operating the rear sunroof.

The rear sunroof isolation switch is in the earth path between the rear sunroof rear switch and the sunroof ECU.  
Operating the rear sunroof isolation switch opens the circuit and prevents the rear sunroof rear switch from operating 
the rear sunroof. 

TestBook cannot monitor the state of the rear sunroof isolation 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 rear switch open, rear 
sunroof isolation switch pressed

> 10,000

C0784-6

Ignition in position II, rear sunroof rear switch open, rear 
sunroof isolation switch released

< 0.5

C0785-9

Ignition in position II, rear sunroof rear switch closed, rear 
sunroof isolation switch pressed

> 10,000

C0785-9

Ignition in position II, rear sunroof rear switch closed, rear 
sunroof isolation switch released

< 0.5