Pinpoint Test F: The Shield (Sunshade) Does Not Open Or Close
- Refer to ROOF OPENING PANEL
for schematic and connector information.
Normal Operation and Fault Conditions
The shield (sunshade) motor receives battery voltage at all times from BCM fuse F24 (30A), and receives ignition voltage (accessory delay) from BCM fuse F2 (10A). The roof opening panel motor and switch is grounded through circuit G303 and G302 respectively. When the shield (sunshade) open switch is pressed, a signal is sent to the shield (sunshade) motor on sunshade open circuit which causes the shield (sunshade) to open. When the shield (sunshade) close switch is pressed, a signal is sent to the shield (sunshade) motor on the sunshade close circuit which causes the shield (sunshade) to close.
If the K bus (communication) circuit between the sunroof motor and shield (sunshade) motor is open or shorted the sunroof motor will only fully close the sunroof one time, then not operate. Also, if the K bus circuit is open or shorted the shield (sunshade) motor will not operate but the roof opening panel close to the fully closed position 1 time.
If the shield is not open at least to the front of the rear glass (comport stop) and the shield should open to the comfort stop.
Possible Sources
- Fuse(s)
- Wiring, terminals or connectors
- Roof opening panel shield (sunshade) motor/module assembly
- Roof opening panel switch
- F1 CHECK ROOF OPENING PANEL GLASS OPERATION
- Ignition ON.
- Press and hold shield (sunshade) open switch until the shield (sunshade) is fully opened.
- Press and hold shield (sunshade) close switch until the shield (sunshade) is fully closed.
- Press and release shield (sunshade) close switch to the second detent (one-touch open). The shield (sunshade) should open to the front of the fixed glass panel.
Does the shield (sunshade) operate as expected?
Yes GO to F6 No GO to F2 - F2 CHECK THE SHIELD CONTROL CIRCUITS FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect Shield motor C9040.
- Disconnect Roof opening panel control switch C930.
- Ignition ON.
Is any voltage present?
Yes Repair the circuit. No GO to F3 - F3 CHECK THE SHIELD CONTROL CIRCUITS FOR A SHORT TO GROUND
- Ignition OFF.
Are the resistances greater than 10, 000 ohms?
Yes GO to F4 No REPAIR the circuit. - F4 CHECK THE SHIELD CONTROL CIRCUITS FOR AN OPEN
Are the resistances less than 3 ohms?
Yes GO to F5 No REPAIR the circuit. - F5 CHECK THE SHIELD CONTROL CIRCUITS FOR A SHORT TOGETHER
- Measure:
Positive Lead Measurement / Action Negative Lead C9040-6 C9040-5 C9040-6 C9040-3 C9040-6 C9040-4 C9040-6 C9040-10 C9040-5 C9040-3 C9040-5 C9040-4 C9040-5 C9040-10
Are the resistances greater than 10, 000 ohms?
Yes GO to F6 No REPAIR the circuit. - Measure:
- F6 CHECK THE ROOF OPENING PANEL MOTOR/MODULES AND SWITCH FOR CORRECT OPERATION
- Ignition OFF.
- Disconnect All sunroof system and related in-line connectors.
- Check for:
- corrosion - install new connector or terminals and clean module pins
- damaged or bent pins - install new terminals or pins
- pushed-out pins - install new pins as necessary
- Connect all sunroof system and related in-line connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new roof opening panel motor and shield motor. REFER to: Roof Opening Panel Motor . TEST the system for normal operation. If the concern still exists, INSTALL a new roof opening panel control switch. REFER to: Roof Opening Panel Control Switch . No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.