Jaguar XJ (X350). Service manual — part 1538

controls the roof opening panel. The roof opening panel motor and module are not available
separately. The roof opening panel may be operated from the roof opening panel switch or the
global close function.

Roof Opening Panel Control Switch Operation

The system operates as follows from the roof opening panel switch:

•

Press the rear of the switch to the first detent with the roof opening glass in the closed
position. The roof opening panel glass opens rearward until the roof opening panel
switch is released or the roof opening panel glass reaches the fully open position.

o

The roof opening panel glass opens rearward until the roof opening panel
switch is released or the roof opening panel glass reaches the fully open
position.

•

Press the rear of the switch to the second detent with the roof opening panel glass in
the closed position. Activates the 'one touch' open feature. The roof opening panel
glass will slide rearward until the roof opening panel switch is pressed in any direction
or the roof opening panel glass reaches the fully open position.

o

Activates the 'one touch' open feature.

o

The roof opening panel glass will slide rearward until the roof opening panel
switch is pressed in any direction or the roof opening panel glass reaches the
fully open position.

•

Press the front of the switch to the first detent with the roof opening panel glass in the
closed position. The roof opening panel glass will vent up until the roof opening panel
switch is released or the roof opening panel glass reaches the full vent up position.

o

The roof opening panel glass will vent up until the roof opening panel switch is
released or the roof opening panel glass reaches the full vent up position.

•

Press the front of the switch to the second detent with the roof opening panel glass in
the closed position. The roof opening glass will vent up until the roof opening glass
reaches the full vent up position or the switch is pressed in any direction.

o

The roof opening glass will vent up until the roof opening glass reaches the full
vent up position or the switch is pressed in any direction.

•

Press the front of the switch to the first detent with the roof opening panel glass in the
fully open position. The roof opening panel glass will slide forward until the roof
opening panel glass reaches the fully closed position or the switch is released.

o

The roof opening panel glass will slide forward until the roof opening panel
glass reaches the fully closed position or the switch is released.

•

Press the front of the switch to the second detent with the roof opening glass in the
fully open position. The roof opening panel glass will close until the roof opening
panel switch is pressed in any direction or the roof opening panel glass reaches the
fully closed position.

o

The roof opening panel glass will close until the roof opening panel switch is
pressed in any direction or the roof opening panel glass reaches the fully closed
position.

•

Press the rear of the switch to the first detent with the roof opening panel glass in the
vent up position. The roof opening panel glass will close until the roof opening panel
switch is released or the roof opening panel glass reaches the full closed position.

o

The roof opening panel glass will close until the roof opening panel switch is
released or the roof opening panel glass reaches the full closed position.

•

Press the rear of the switch to the second detent with the roof opening panel glass in
the vent up position. The roof opening panel glass will close until the roof opening
panel switch is pressed in any direction or the roof opening panel glass reaches the
fully closed position.

o

The roof opening panel glass will close until the roof opening panel switch is
pressed in any direction or the roof opening panel glass reaches the fully closed
position.

Global Opening And Closing Operation

The roof opening panel is included in the global open and close operation. This function
opens or closes the power windows and the roof opening panel automatically. For additional
information on the global open and close feature for the power windows, refer to <<501-
11>>. The global open function is activated by:

•

unlocking the drivers door using the remote keyless entry transmitter. Within five
seconds, press and hold the unlock button.

•

unlocking the drivers door using the driver door lock cylinder and the key. Hold the
key in the unlock position.

The global close function is activated by:

•

turning the driver door lock cylinder to the lock position and holding.

Global open and close operation is only available with the ignition in the OFF position and
the ignition key removed.

When the global open or close operation is selected, the roof opening panel switch is not
recognized by the roof opening panel control module throughout the operation and five
seconds after the operation is completed.

Global open and close will operate as follows:

•

With the roof opening glass in the closed position, activating global open will operate
the roof opening panel glass to the fully open position.

•

With the roof opening panel glass in the fully open position, activating global close
will operate the roof opening panel glass to the closed position.

•

If a global open is commanded within five seconds of a completed global operation,
the roof opening panel glass will reverse the previous completed global operation. If
the roof opening glass was globally closed from the vent position, a global open within
five seconds would tilt the roof opening panel glass back to the vent position.

•

If the roof opening panel glass was globally closed from the fully open position, a
global open within five seconds would slide the roof opening glass back to the fully
open position.

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Diagnosis and testing

Roof Opening Panel

Principles of operation

Roof Opening Panel Control Module

Battery power is continuously supplied to the roof opening panel control module. However,
the roof opening panel will only operate from the roof opening panel switch with the ignition
switch with the ignition a switch in the RUN or ACC position. The global open and close
feature is controlled by two circuits from the REM. The two circuits must be at ground
potential before the roof opening panel control module will acknowledge the roof opening
panel switch. When the ignition switch is turned to RUN or ACC, the REM provides ground
to these circuits.

The roof opening panel control module incorporates soft stops at the end of all travel
positions. The roof opening panel control module monitors the internal switches to determine
the roof opening glass position and the soft stops. The internal switches are activated by the
roof opening panel motor rotation.

The roof opening panel control module supplies the power and ground to the roof opening
panel motor depending on the ordered function. Power is supplied to the roof opening panel
for a maximum of 12 seconds. Under normal operation, position is monitored by the roof
opening panel control module and power is removed from the roof opening panel motor as
soon as the roof opening panel reaches the commanded position.

Roof Opening Panel Switch

Four circuits connect the roof opening panel switch to the roof opening panel control module.
One circuit is the common return. The other three are control circuits open, close and tilt. The
roof opening panel control module monitors these lines for voltage fluctuation to determine
which function was selected.

With the ignition switch in the RUN or ACC position, the roof opening panel supplies a five
volt reference voltage to three control lines. Activation of the roof opening panel switch
connects one or more of these lines to the common return which pulls the line low. The roof
opening panel control module will sense the line or lines being connected to the common line
and carry out the appropriate function.

The express open function connects the open and tilt circuits to the common return when the
roof opening panel switch is moved rearward to the second detent position. The operator-
controlled open function connects the open circuit to the common return. The close function
connects the close circuit to the common causing the roof opening panel to close from a slide
or vent position.

Global Open and Close

Two circuits connect the rear electronics module (REM) to the roof opening panel control
module for these functions. Global open and close operation for the roof opening panel is
controlled by one of these two circuits being grounded by the REM.

When the ignition switch is in the RUN or ACC position, the REM grounds both of these
circuits allowing normal operation of the roof opening panel from the roof opening panel
switch. Global open and close operation is only available with the ignition in the OFF position
and the ignition key removed.

When global open or close operation is selected, the roof opening panel switch is not
recognized by the roof opening panel control module throughout the operation and five
seconds after the operation is completed.

With the ignition switch in the OFF position, the roof opening panel control module supplies
a constant voltage to these two circuits. The roof opening panel control module monitors these
lines for a low state, caused by the REM grounding the line, to determine the ordered global
function by the REM.

Global open is commanded by the REM grounding control line two. Line one will remain at
previous voltage.

Global close is commanded by the REM grounding control line one. Line two will remain at
previous voltage.

If both lines have voltage, the roof opening panel will be inoperative.

Inspection and Verification

1 . Verify the customer concern by operating the system.

2 . Visually inspect for obvious signs of mechanical and electrical damage.

Visual Inspection Chart

Mechanical

Electrical

•

Roof opening panel frame

•

Roof opening panel glass weatherstrip

•

Roof opening panel alignment

•

Motor synchronization

•

Fuse(s)

•

Roof opening panel switch

•

Roof opening panel motor

•

Wiring harness

•

Electrical connector(s)

1 . If an obvious cause for an observed or reported concern is found, correct the cause (if
possible) before proceeding to the next step.

2 . If the concern is not visually evident, verify the Symptom Chart.

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