Diagnosis And Testing - Sunroof Operation

The hard wired circuits between components related to the operation of the power sunroof system may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, details of wire harness routing and retention, connector pin-out information and location views for the various wire harness connectors, splices and grounds.

However, conventional diagnostic methods will not prove conclusive in the diagnosis of the electronic module integral to the power sunroof motor. If the power sunroof switches, motors and circuitry test okay, but the express or Excess Force Limitation (EFL) features are still ineffective following the initialization procedure, the motor and module unit must be replaced.

CONDITION	POSSIBLE CAUSES	CORRECTION
POWER SUNROOF COMPLETELY INOPERATIVE	1. Ineffective ground circuit.	1. Test and repair the open sunroof motor ground circuit if required.
	2. Ineffective feed circuit.	2. Test and repair the open sunroof motor feed circuit if required.
	3. Ineffective sunroof switch.	3. Test and replace the sunroof switch if required.
	4. Ineffective sunroof motor and module unit.	4. Replace the sunroof motor and module unit if required.
AUDIBLE WHINE WHEN POWER SUNROOF SWITCH IS ACTUATED	1. Binding drive cable.	1. Replace the binding drive cable if required.
AUDIBLE WHINE WHEN POWER SUNROOF SWITCH IS ACTUATED	2. Ineffective sunroof motor and module unit.	2. Replace the sunroof motor and module unit if required.
AUDIBLE CLICKING OR RATCHETING WHEN POWER SUNROOF SWITCH IS ACTUATED	1. Improperly adjusted sliding glass panel.	1. Adjust the sunroof glass panel if required. Refer to GLASS, SUNROOF, INSTALLATION .
	2. Damaged or worn drive cable.	2. Replace the broken or worn drive cable if required.
	3. Damaged or worn motor drive gear.	3. Replace the sunroof motor and module unit if required.
POWER SUNROOF OPENS BUT DOES NOT CLOSE	1. Damaged or disengaged trough guide.	1. Replace or reinstall trough guide if required.
	2. Binding drive cable.	2. Replace the binding drive cable if required.
	3. Ineffective CLOSE circuit.	3. Repair the sunroof CLOSE circuit between the switch and the motor if required.
	4. Ineffective sunroof switch.	4. Test and replace the sunroof switch (overhead console assembly) if required.
	5. Ineffective sunroof motor and module unit.	5. Replace the sunroof motor and module unit if required.
POWER SUNROOF CLOSES BUT DOES NOT OPEN	1. Binding drive cable.	1. Replace the binding drive cable if required.
	2. Ineffective OPEN circuit.	2. Repair the sunroof OPEN circuit between the switch and the motor if required.
	3. Ineffective sunroof switch.	3. Test and replace the sunroof switch (overhead console assembly) if required.
	4. Ineffective sunroof motor and module unit.	4. Replace the sunroof motor and module unit if required.
POWER SUNROOF GLASS MOVEMENT INCONSISTENT - NOT SMOOTH AND UNIFORM	1. Improperly adjusted sliding glass panel.	1. Adjust the sunroof glass panel if required. Refer to GLASS, SUNROOF, INSTALLATION .