Sun Visor: Testing and Inspection
Power Sunshade Inoperative
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions)provides an overview of each diagnostic category.
Diagnostic Fault Information
Circuit/System Description
The rear window sunshade control module contains the logic for extending or retracting the sunshade based on inputs received from the sunshade switch. The switch is a momentary type, and is located in the center console multifunction switch. The module activates the sunshade motor based on the inputs received from the switch. When the ignition switch is in the ON position, voltage is applied to the rear window sunshade control module via the RAP 2 fuse. The rear window sunshade control module controls the rear window sunshade motor direction by changing the polarity of the applied voltage. If the ignition switch is turned to the OFF position while the sunshade is moving, the module enters a "Standby" mode, and the shade will complete its cycle. The module will remain in the "Standby" mode and the shade will remain in the position it was in when movement ceased, until the module receives another switch activation input. Movement will then resume, but in the opposite direction from the last activation.
The sunshade motor assembly contains the reversible DC drive motor and the gear train used to move the shade material to the desired position. The motor also contains a positive temperature coefficient (PTC) thermal circuit breaker to protect the system from an overload.
Reference Information
Schematic Reference
Sunshade Schematics (Electrical Diagrams)
Connector End View Reference
Component Connector End Views (Connector End Views By Name)
Description and Operation
Rear Window Inside Sunshade Description and Operation (Description and Operation)
Electrical Information Reference
* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)
Circuit/System Verification
1. Headlights ON, verify that the rear window sunshade switch backlight is illuminated.
• If the backlight is not illuminated, refer to Interior Backlighting Malfunction (Interior Backlighting Malfunction)
2. Ignition ON, command the rear window sunshade to EXTEND and RETRACT by pressing the sunshade switch. The rear window sunshade should EXTEND and RETRACT each time the sunshade switch is pressed
Circuit/System Testing
1. Ignition OFF, disconnect the X1 harness connector at the rear window sunshade control module.
2. Test for less than 5 ohm between the ground circuit terminal 2 and ground.
• If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 1 and ground.
• If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
4. Connect a test lamp between the signal circuit terminal 4 and B+.
5. Command the rear window sunshade motor to EXTEND and RETRACT by pressing the sunshade switch, the test lamp should turn ON each time the sunshade switch is pressed.
• If the test lamp is always OFF, test the signal circuit for a short to B+ or an open/high resistance. If the circuit tests normal, test or replace the rear window sunshade switch.
• If the test lamp is always ON, test the signal circuit for a short to ground. If the circuit tests normal, test or replace the rear window sunshade switch.
6. Ignition OFF, connect the X1 harness connector and disconnect the X2 harness connector at the rear window sunshade control module.
7. Test for less than 5 ohm between the control terminal at the rear window sunshade control module listed below and ground.
* Control terminal 1
* Control terminal 2
• If greater than the specified range, replace the rear window sunshade control module.
8. Connect a test lamp between the control terminal 1 and the control terminal 2.
9. Ignition ON, command the rear window sunshade motor to EXTEND and RETRACT by pressing the sunshade switch. The test lamp should turn ON when commanding the EXTEND and RETRACT states.
• If the test lamp is OFF during either command, replace the rear window sunshade control module.
10. If all circuits tests normal, test or replace the rear window sunshade motor.
Component Testing
Sunshade Switch
1. Ignition OFF, disconnect the harness connector at the rear window sunshade switch.
2. Test for infinite resistance between the signal terminal 4 and the ground terminal 2 with the switch in the open position.
• If not the specified value, replace the rear window sunshade switch.
3. Test for less than 2.0 ohm between the signal terminal 4 and the ground terminal 2 with the switch in the closed position.
• If greater than the specified range, replace the rear window sunshade switch.
Rear Window Sunshade Motor
1. Ignition OFF, disconnect the X2 harness connector at the rear window sunshade control module.
2. Install a 10A fused jumper wire between one of the control circuit terminals and 12 V. Momentarily install a jumper wire between the other control circuit terminal and ground. Reverse the jumper wires at least two times, the rear window sunshade motor should perform the EXTEND and RETRACT functions.
• If it does not perform as specified, replace the rear window sunshade motor.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Rear Window Inside Sunshade Switch Replacement (Rear Window Inside Sunshade Switch Replacement)
* Rear Window Inside Sunshade Control Module Replacement (Rear Window Inside Sunshade Control Module Replacement)