Diagnosis And Testing - Power Sunroof System

The hardwired 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 appropriate SYSTEM 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 integrated sunroof/sunshade motor electronics. If the power sunroof switches, motors and circuitry test okay, but the express or Obstacle Detection features are still ineffective following the calibration and initialization procedures, the motor and module unit must be replaced.

CONDITION	POSSIBLE CAUSES	CORRECTION
POWER SUNROOF AND POWER SUNSHADE COMPLETELY INOPERATIVE AND UNRESPONSIVE	1. Thermal protection feature on motor active.	1. If the sunroof or sunshade has been cycled consecutively several times with little pause between cycles the motor thermal protection may engage and stop responding to switch inputs. Do not attempt to operate sunroof for at least two minutes to allow motor(s) to cool and the thermal protection to become inactive, then test again.
	2. Blown sunroof feed B(+) fuse.	2. Inspect sunroof B(+) fuse located in Power Distribution Center (PDC) and replace if required.
	3. Broken ground circuit.	3. Disconnect wire harness at sunroof and test if the ground pin in vehicle harness connector is grounding to body (Refer to the appropriate wiring information for connector pin outs). Repair ground circuit if necessary.
	4. Broken fused B(+) circuit	4. Disconnect wire harness at sunroof and measure the voltage between ground pin and B(+) pin in the vehicle harness connector with vehicle battery connected (Refer to the appropriate wiring information for connector pin outs). Repair B(+) circuit if no battery voltage detected.
	5. Broken fused ignition (ON - ACC) circuit.	5. Disconnect wire harness at sunroof and measure the voltage between ground pin and ignition pin in the vehicle harness connector with vehicle battery connected and ignition set to Accessory (ACC) (Refer to the appropriate wiring information for connector pin outs). Repair fused ignition circuit if no battery voltage detected.
	6. Bent connector pin for B(+) or Ground circuit at one of the wire harness connections between the sunroof and Power Distribution Center (PDC)	6. Disconnect wire harness connections between the sunroof harness connection and PDC and inspect closely for bent connector pin. Replace wire harness or repair if bent connector pin found.
	7. Defective sunroof/sunshade switch assembly in overhead console.	7. Test and replace the sunroof/sunshade switch assembly (overhead console assembly) if required.
	8. Defective sunroof/sunshade motor	8. Replace the sunroof/sunshade motor if required.
SLIGHT SUNROOF OR SUNSHADE MOVEMENT OR AUDIBLE RELAY CLICKS BUT WILL NOT COMPLETE MOVEMENT FOR ANY SUNROOF CONTROL SWITCH ACTUATIONS	1. Binding glass mechanism or binding sunshade guide due to debris or obstruction in aluminum guide rail.	1. Remove the debris or obstruction from sunroof guide rail.
	2. Defective sunroof/sunshade motor or broken drive cable or mechanism	2. Remove the sunroof or sunshade motor from sunroof assembly but do not disconnect wire harness. Attempt to operate motor with sunroof control switches in overhead console and ignition in ACCESSORY. If motor will not operate replace the defective motor. If motor does cycle/operate when removed from sunroof assembly it is likely that a drive cable or mechanism has failed; if this is confirmed it is necessary to replace the entire sunroof frame.
GLASS OR SUNSHADE AUTO REVERSES DURING EXPRESS CLOSE OPERATION BUT NO OBSTRUCTION PRESENT IN ROOF OPENING	1. Debris or obstruction in sunroof guide rails interfering with sunroof mechanism or sunshade guides.	1. Fully open sunroof glass or sunshade and inspect sunroof aluminum guide rails for debris that may be interfering with sliding mechanisms and clean as necessary.
	2. Debris under wind deflector springs not allowing wind deflector to properly retract during close operation.	2. Inspect for debris under wind deflector springs and remove as necessary.
	3. Sunroof obstacle detection system requires re-calibration	3. Perform re-initialization & obstacle detection calibration procedure. Refer to MOTOR, SUNROOF, STANDARD PROCEDURE .
POWER SUNROOF OPENS TO VENT AND CLOSES FROM VENT BUT DOES NOT SLIDE OPEN OR POWER SUNSHADE CLOSES BUT DOES NOT OPEN (SUNROOF OPEN OR VENT SWITCH STILL AUTO OPENS SUNSHADE BUT NO RESPONSE TO SUNSHADE OPEN SWITCH)	1. Bent connector pin for OPEN switch circuit at one of the wire harness connections between the sunroof and overhead console sunroof/sunshade control switch	1. Disconnect wire harness connections at the sunroof harness to vehicle harness and at overhead console sunroof control switch and inspect closely for bent connector pin. Replace wire harness or repair if bent connector pin found.
	2. Broken wire/circuit between sunroof or sunshade OPEN switch in overhead console and sunroof motors.	2. Inspect for circuit continuity between the wire harness connection to the sunroof and the wire harness connection to the OPEN switch in the overhead console (Refer to the appropriate wiring information for connector pin outs). Repair the circuit if no continuity for sunroof/sunshade OPEN switch circuit.
	3. Defective sunroof OPEN switch in overhead console.	3. Test switch to confirm circuit closes while OPEN switch is pressed. Replace switch if necessary.
	4. Defective sunroof or sunshade motor assembly.	4. Replace the sunroof or sunshade motor if required.
POWER SUNROOF VENTS AND SLIDES OPEN BUT DOES NOT CLOSE (VENT SWITCH NEEDS TO BE PRESSED TO CLOSE SUNROOF FROM SLIDE OPEN POSITION OR OPEN SWITCH NEEDS TO BE PRESSED TO CLOSE SUNROOF FROM VENT POSITION) OR POWER SUNSHADE OPENS BUT DOES NOT CLOSE	1. Bent connector pin for CLOSE switch circuit at one of the wire harness connections between the sunroof and overhead console sunroof/sunshade control switch	1. Disconnect wire harness connections at the sunroof harness to vehicle harness and at overhead console sunroof control switch and inspect closely for bent connector pin. Replace wire harness or repair if bent connector pin found.
	2. Broken wire/circuit between sunroof or sunshade CLOSE switch in overhead console and sunroof motors.	2. Inspect for circuit continuity between the wire harness connection to the sunroof and the wire harness connection to the CLOSE switch in the overhead console (Refer to the appropriate wiring information for connector pin outs). Repair the circuit if no continuity for sunroof/sunshade CLOSE switch circuit.
	3. Defective sunroof CLOSE switch in overhead console.	3. Test switch to confirm circuit closes while CLOSE switch is pressed. Replace switch if necessary.
	4. Defective sunroof or sunshade motor assembly.	4. Replace the sunroof or sunshade motor if required.
POWER SUNROOF SLIDES OPEN AND CLOSE BUT WILL NOT VENT	1. Bent connector pin for VENT switch circuit at one of the wire harness connections between the sunroof and overhead console sunroof/sunshade control switch	1. Disconnect wire harness connections at the sunroof harness to vehicle harness and at overhead console sunroof control switch and inspect closely for bent connector pin. Replace wire harness or repair if bent connector pin found.
	2. Broken wire/circuit between sunroof VENT switch in overhead console and sunroof motors.	2. Inspect for circuit continuity between the wire harness connection to the sunroof and the wire harness connection to the VENT switch in the overhead console (Refer to the appropriate wiring information for connector pin outs). Repair the circuit if no continuity for sunroof VENT switch circuit.
	3. Defective sunroof VENT switch in overhead console.	3. Test switch to confirm circuit closes while VENT switch is pressed. Replace switch if necessary.
	4. Defective sunroof motor assembly.	4. Replace the sunroof motor if required.
POWER SUNROOF INTERMITTENTLY VENTS, OPENS OR CLOSES ON ITS OWN WITHOUT USER SWITCH INPUT WHILE DRIVING VEHICLE	1. OPEN, CLOSE, or VENT switch circuit wire between sunroof switch and sunroof is pinched against body (wire insulation damaged) and intermittently grounding out to body.	1. Inspect circuit wires between sunroof switch and sunroof motor for cut wire insulation or pinch conditions against sheet metal body and repair/replace if necessary.
POWER SUNROOF GLASS OR POWER SUNSHADE MOVES ONLY WHEN SWITCH IS PRESSED AND HELD (MANUAL MODE - LOSS OF ONE-TOUCH OR EXPRESS MODE)	1. Sunroof motors have lost calibration.	1. Perform re-initialization & obstacle detection calibration procedure. Refer to MOTOR, SUNROOF, STANDARD PROCEDURE .
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, REAR, ADJUSTMENTS . .