Diagnosis And Testing - Sunroof System
The hard wired circuits between components related to the operation of the single pane 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.
| CONDITION | POSSIBLE CAUSES | CORRECTION |
|---|---|---|
| POWER SUNROOF ONLY RESPONDS TO SUNROOF VENT SWITCH INPUT (AUDIBLE MOTOR RELAY CLICK NOISE or GLASS MOVES) & NO RESPONSE TO ALL OTHER SWITCH INPUTS | 1. Sunroof motor has lost calibration. | 1. Perform re-initialization & obstacle detection calibration procedure, Refer to MOTOR, SUNROOF, STANDARD PROCEDURE . |
| POWER SUNROOF COMPLETELY INOPERATIVE AND UNRESPONSIVE TO ALL SWITCH PRESSES | 1. Blown sunroof feed B(+) fuse. | 1. Inspect sunroof B(+) fuse F5 located in Assembly-Power Distribution Center-Rear and replace if required. |
| 2. Wire harness not connected to overhead console sunroof control switches | 2. Lower overhead console to confirm harness connector is connected to overhead console. | |
| 3. Blown ignition feed fuse. | 3. Inspect ignition feed fuse F67 located in Assembly-Power Distribution Center-Rear and replace if required. | |
| 4. Broken B(+) A130 or Ground Circuit Z922. Bent connector pins, wire damage or connectors not fully seated. | 4. Disconnect connector I481 (INLINE-HEADLINER/SUNROOF) and inspect for bent pins. With vehicle battery connected check for battery voltage between pins 3 & 5 on I481 headliner connector (ignition state is irrelevant). If no voltage detected disconnect wire harness connections at Assembly-Power Distribution Center-Rear (D6631B) for B(+) circuit A130. Inspect connector closely for bent connector pin. Check for secure ground eyelet connection to body (G305) for circuit Z922. Replace wire harness or repair if bent connector pin found. | |
| 5. Broken fused ignition (RUN/ON) circuit F982. | 5. Disconnect connector I481 (INLINE-HEADLINER/SUNROOF) and measure the voltage between GROUND pin 5 and FUSED IGNITION pin 2 in the I481 connector with vehicle battery connected and ignition set to ON/Run. Inspect fused ignition circuit F982 for bent connector pins or broken wires and repair if no battery voltage detected. | |
| 6. Defective sunroof switch assembly in overhead console. | 6. Test and replace the sunroof switch assembly (overhead console assembly) if required. | |
| 7. Broken SUNROOF SWITCH SUPPLY Q6 circuit. | 7. Disconnect connector D2294A at overhead console and confirm that connector pin for SUNROOF SWITCH SUPPLY Q6 grounds out to body. If SUNROOF SWITCH SUPPLY Q6 does not ground to body inspect circuit for damaged wire or bent pin and repair if necessary. | |
| 8. Defective sunroof motor | 8. Replace the sunroof motor if required. | |
| SLIGHT SUNROOF MOVEMENT OR AUDIBLE RELAY CLICKS BUT WILL NOT COMPLETE MOVEMENT FOR ANY SUNROOF CONTROL SWITCH ACTUATIONS | 1. Binding glass mechanism due to debris or obstruction in aluminum guide rail. | 1. Remove the debris or obstruction from sunroof guide rail. |
| 2. Defective sunroof motor or broken drive cable or mechanism. | 2. Remove the sunroof motor from sunroof assembly but do not disconnect wire harness. Attempt to operate motor with sunroof control switches in overhead console and ignition in ON/Run. 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 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. | 1. Fully open sunroof glass and inspect sunroof aluminum guide rails for debris that may be interfering with sliding mechanisms and clean as necessary. |
| 2. Debris under wind deflector 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 | 1. Defective sunroof OPEN switch in overhead console. | 1. Lower overhead console and disconnect SWITCH-SUNROOF (D2294A) wire connection and test switch to confirm circuit closes between SUNROOF OPEN SWITCH SENSE (Q3) and SUNROOF SWITCH SUPPLY (Q6) while OPEN switch is pressed. Replace switch if necessary. |
| 2. Broken SUNROOF OPEN SWITCH SENSE Q3 circuit. | 2. Disconnect wire harness connections:
Test the continuity of the SUNROOF OPEN SWITCH SENSE Q3 circuit. Proceed to step 3 if broken circuit found. Proceed to step 5 if circuit tests OK. |
|
| 3. Bent connector pin for SUNROOF OPEN SWITCH SENSE Q3 circuit at one of the wire harness connections between the sunroof and overhead console sunroof control switch. | 3. Disconnect wire harness connections at:
Inspect each connector closely for bent connector pin or pushed out connector pin(s). Replace wire harness or repair connector pin if damage found. If no bent connector pins found proceed to Step 4. |
|
| 4. Broken or damaged wire between sunroof OPEN switch in overhead console and sunroof motor (circuit Q3). | 4. Inspect wire harnesses for sunroof close switch sense Q5 circuit continuity between:
Repair or replace wire harness with broken circuit. |
|
| 5. Defective sunroof motor assembly. | 5. Replace the sunroof motor if required. | |
| POWER SUNROOF VENTS AND SLIDES OPEN BUT DOES NOT CLOSE | 1. Defective sunroof CLOSE switch in overhead console. | 1. Lower overhead console and disconnect SWITCH-SUNROOF (D2294A) wire connection and test switch to confirm circuit closes between SUNROOF CLOSE SWITCH SENSE (Q5) and SUNROOF CLOSE SWITCH SUPPLY (Q6) while CLOSE switch is pressed. Replace switch if necessary. |
| 2. Broken SUNROOF CLOSE SWITCH SENSE Q5 circuit. | 2. Disconnect wire harness connections:
Test the continuity of the SUNROOF CLOSE SWITCH SENSE Q5 circuit. Proceed to Step 3 if broken circuit found. Proceed to Step 5 if circuit tests OK. |
|
| 3. Bent connector pin for SUNROOF CLOSE SWITCH SENSE Q5 circuit at one of the wire harness connections between the sunroof and overhead console sunroof control switch. | 3. Disconnect wire harness connections at:
Inspect each connector closely for bent connector pin or pushed out connector pin. Replace wire harness or repair connector pin if damage found. If no bent connector pins found proceed to Step 4. |
|
| 4. Broken or damaged wire between sunroof CLOSE switch in overhead console and sunroof motor (circuit Q5). | 4. Inspect wire harnesses for SUNROOF CLOSE SWITCH SENSE Q5 circuit continuity between:
Repair or replace wire harness with broken circuit. |
|
| 5. Defective sunroof motor assembly. | 5. Replace the sunroof motor if required. | |
| POWER SUNROOF SLIDES OPEN AND CLOSE BUT WILL NOT VENT | 1. Defective sunroof VENT switch in overhead console. | 1. Lower overhead console and disconnect SWITCH-SUNROOF (D2294A) wire connection and test switch to confirm circuit closes between SUNROOF VENT SWITCH SENSE Q4 and SUNROOF SWITCH SUPPLY Q6 while VENT switch is pressed. Replace switch if necessary. |
| 2. Broken SUNROOF VENT SWITCH SENSE Q4 circuit. | 2. Disconnect wire harness connections:
Test the continuity of the SUNROOF VENT SWITCH SENSE Q4 circuit. Proceed to Step 3 if broken circuit found. Proceed to Step 5 if circuit tests OK. |
|
| 3. Bent connector pin for SUNROOF VENT SWITCH SENSE Q4 circuit at one of the wire harness connections between the sunroof and overhead console sunroof control switch. | 3. Disconnect wire harness connections at:
Inspect each connector closely for bent connector pin or pushed out connector pin. Replace wire harness or repair connector pin if damage found. If no bent connector pins found proceed to Step 4. |
|
| 4. Broken or damaged wire between sunroof VENT switch in overhead console and sunroof motor (circuit Q4). | 4. Inspect wire harnesses for SUNROOF VENT SWITCH SENSE Q4 circuit continuity between:
Repair or replace wire harness with broken circuit. |
|
| 5. Defective sunroof motor assembly. | 5. 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. |
| 2.) Connector pin/terminals for VENT, CLOSE or OPEN crossed with an adjacent ground pin/terminal in the same connector | 2. Inspect each connector between sunroof motor and overhead console switch for crossed pins / pulled out pins at:
Repair connector pins if crossed pins / pulled out pins found. |