SUNROOF (Operation): DESCRIPTION AND OPERATION

SUNROOF

DESCRIPTION AND OPERATION 76-6-13

Operation

Ignition switched-off timeout 
There are three timeout modes for operating the sunroof assemblies after the ignition is switched off.  The BCU 
determines the vehicle's timeout mode.  The three modes are: 

l

When the ignition is switched off, no sunroof operation is permitted.

l

When the ignition is switched off, sunroof  remains functional for 45 seconds or until the driver door is opened.

l

When the ignition is switched off, sunroof  remains functional for 45 seconds or until any door is opened.

Sunroof open and close
Both sunroof assemblies operate in the same manner.  The front sunroof assembly has one switch while there are 
two switches to control rear sunroof assembly, a rear sunroof front switch and a rear sunroof rear switch.  

The sunroof ECU monitors the position of the sunroof microswitch to determine if the sunroof is to be tilted  or opened.

In order for the  sunroof to operate, either of the following conditions must exist:

l

Ignition switch in position II.

l

Ignition switched from on to off, doors closed (this may enable the system to operate for 45 seconds after the 
ignition is switched off, or until a door is opened).

When the sunroof is closed, pressing the rear of the sunroof switch causes the sunroof ECU to operate the sunroof 
motor and  open the sunroof.  When the sunroof opens, the sunroof microswitch opens.  The sunroof continues to 
open until the switch is released or the sunroof reaches the fully open position.

When the sunroof is open, pressing the front of  the sunroof switch causes the sunroof ECU to operate the sunroof 
motor and close the sunroof.  The sunroof ECU continues to operate the motor until the sunroof microswitch closes.  
This indicates to the sunroof ECU that the sunroof is fully closed.

Sunroof tilt 
Both sunroof assemblies operate in the same manner.  The front sunroof assembly has one switch while there are 
two switches to control rear sunroof assembly, a rear sunroof front switch and a rear sunroof rear switch.  

The sunroof ECU monitors the position of the sunroof microswitch to determine if the sunroof is to be tilted  or  opened.

In order for the sunroof to operate, either of the following conditions must exist.

l

Ignition in position II.

l

Ignition switched from on to off, doors closed (this may enable the system to operate for 45 seconds after the 
ignition is switched off, or until a door is opened).

When the sunroof is closed and the front of the sunroof switch is pressed, the sunroof ECU detects the combination 
of closed microswitch and front of sunroof switch being pressed and tilts the rear of the sunroof.  This causes the 
microswitch to open.  The sunroof continues to open until the switch is released or the sunroof reaches the fully open 
position.

When the sunroof is tilted  and the rear of the sunroof switch is pressed, the sunroof ECU detects the combination of 
open microswitch and rear of sunroof switch and closes the sunroof until the microswitch closes.  This indicates to the 
sunroof ECU that the sunroof is fully closed.

Rear sunroof isolation
The rear sunroof isolation switch prevents the rear sunroof rear switch from operating the rear sunroof.  This can be 
used to prevent small children sitting in the rear seat from playing with the rear sunroof.

Pressing the rear sunroof isolation switch opens the circuit between the rear sunroof rear switch and the sunroof ECU.  
The sunroof ECU ignores the rear sunroof switch until the rear sunroof isolation switch is pressed and the circuit 
closes.