Midgate Power Window Inoperative
Midgate Power Window 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 midgate power window is controlled by the midgate module using inputs from the midgate window switch and the driver door switch (DDS). The window switch circuits are referenced from ground by the midgate module and are determined to be active when high. The midgate module also uses inputs from 2 Hall effect sensors located on the motor. The hall sensors enable the module to monitor the window position and motor speed.
Diagnostic Aids
Some midgate power window system faults will cause the midgate module to operate the power window in the Error/Jog mode while commanding the window UP or DOWN. The system will go into the Error/Jog mode whenever the midgate module is unable to determine the position of the glass due to memory corruption or Hall sensor failures. One of the switches stuck in the UP position can also cause the Error/Jog mode to occur.
Reference Information
Schematic Reference
Moveable Window Schematics ([1][2]Electrical Diagrams)
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
Power Windows Description and Operation (Power Windows Description and Operation)
Electrical Information Reference
* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)
Scan Tool Reference
Control Module References (Programming and Relearning) for scan tool information
Circuit/System Verification
Command the midgate window UP and DOWN by using the midgate window switch and the global window switch. The midgate window should go UP and DOWN as commanded
Circuit/System Testing
Midgate Window Inoperative
1. Ignition OFF, disconnect the harness connector at the midgate module.
2. Test for less than 1 ohm between ground circuit terminal 6 and ground.
• If greater than the specified range, test the ground circuit for an open/high resistance.
3. Test for less than 1 ohm between ground circuit terminal 16 and ground.
• If greater than the specified range, test the ground circuit for an open/high resistance.
4. Ignition ON, verify that a test lamp illuminates between the B+ circuit 10 and ground.
• If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
5. Ignition ON, verify that a test lamp illuminates between the B+ circuits 20 and ground.
• If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
6. Verify that a test lamp illuminates between the ignition circuit terminal 8 and ground.
• If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
7. Connect a test lamp between the signal circuit terminal 2 and ground.
8. Command the midgate window UP using the midgate window switch. The test lamp should illuminate during the UP command.
• If the test lamp is always OFF, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the midgate window switch.
• If the test lamp is always ON, test the signal circuit for a short to voltage. If the circuit tests normal, replace the midgate window switch.
9. Connect a test lamp between the signal circuit terminal 19 and ground.
10. Command the midgate window UP using the global window switch. The test lamp should illuminate during the UP.
• If the test lamp is always OFF, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the DDS.
• If the test lamp is always ON, test the signal circuit for a short to voltage. If the circuit tests normal, replace the DDS.
11. Ignition OFF, disconnect the X5 harness connector at the DDS.
12. Connect a test lamp between the signal circuit terminal 3 and ground.
13. Ignition ON, command the midgate window DOWN using the midgate window switch. The test lamp should illuminate during the DOWN command.
• If the test lamp is always OFF, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the midgate window switch.
• If the test lamp is always ON, test the signal circuit for a short to voltage. If the circuit tests normal, replace the midgate window switch.
14. Ignition OFF, connect the X5 harness connector at the DDS.
15. Ignition ON, command the midgate window DOWN using the global window switch. The test lamp should illuminate during the DOWN command.
• If the test lamp is always OFF, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the DDS.
• If the test lamp is always ON, test the signal circuit for a short to voltage. If the circuit tests normal, replace the DDS.
16. If all the circuits test normal replace the midgate module.
Component Testing
Midgate Window Switch
1. Ignition OFF, disconnect the harness connector at the midgate window switch.
2. Test for infinite resistance between the signal terminals B and C and the ignition terminal A with the switch in the INACTIVE position.
• If less than the specified value, replace the midgate window switch.
3. Test for less than 2 ohms between the signal terminal C and the ignition terminal A with the switch in the UP position.
• If greater than the specified range, replace the midgate window switch.
4. Test for less than 2 ohms between the signal terminal B and the ignition terminal A with the switch in the DOWN position.
• If greater than the specified range, replace the midgate window switch.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Midgate Window Learn Cycle (Procedures)
* Midgate Window Regulator Module Motor Replacement (Service and Repair)