Circuit Description
The express Up function of the power windows is monitored and controlled by the front and rear door modules and the individual window sensors. Each power window motor has a window sensor mounted to it. Each door module communicates with its power window sensor via the power window motor up/down command lines. The power window motors communicate with the door modules via the power window status circuit. The window sensors detect differences in the window motors electrical pulses to determine if there is an obstruction to the travel of the window glass. The power window motors will disable the express up movement of a window in the event that an object has obstructed the windows upward movement.
The power window status circuit is a unique 1-way serial data link between the door module and its power window sensor. The power window motors communicate with there associated door modules by changing the state from high to low over the power window status circuit. For more detailed information concerning power window operation, refer to Power Windows Description and Operation .
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC B3832 Window Express UP System/Function Not Initialized
This vehicle has DTCs which include DTC symptoms. For more information on DTC symptoms, refer to DTC Symptom Description .
DTC Symptom | DTC Symptom Descriptor |
|---|---|
08 | Invalid Signal |
Conditions for Running the DTC
| • | The DDM, PDM, LRDM, RRDM, and DDSA must be powered. |
| • | DTC B1325 Battery Voltage Out of Range, must not be current. |
Conditions for Setting the DTC
| • | DTC B3832 indicates that a sensor does not know the actual position of its window glass or there is a fault present on the power window status circuit. The sensor will send a Not Normalized/Not Initialized message over the power window status circuit to its corresponding door module. |
| • | The door modules will attempt an express up function 5 times without receiving proper inputs from the power window motors. |
Action Taken When the DTC Sets
| • | The DDM, PDM, LRDM, or RRDM will not allow Express UP operation of the window. |
| • | The Express Down function will still operate. |
| • | All other window functions for that window will still operate. |
Conditions for Clearing the DTC
| • | The condition responsible for setting the DTC no longer exists. |
| • | You issue a scan tool CLEAR DTCs command. |
| • | After 40 consecutive warm-up cycles without failure, the history DTC will be cleared. |
Diagnostic Aids
DTC B3832 may be set and the Express Up function disabled if the vehicle or the door module has recently lost power for any reason. You should first attempt to re-initialize the Express Up function. Refer to Window Motor Programming - Express Function .
Thoroughly inspect the wiring and connectors. An incomplete inspection of the wiring and connectors may result in misdiagnosis causing part replacement with the reappearance of the malfunction. If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections .
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Moveable Window Schematics Connector End View Reference: Vehicle Access Connector End Views | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |
2 | Attempt to operate the inoperative window to the Up, Down, and Express Down positions. Does the window move to the Up, Down, Express Up, and Express Down positions as expected? | Go to Step 3 | Go to Symptoms - Doors |
3 | Perform the window sensor/motor initialization procedure. Refer to Window Motor Programming - Express Function . Did you complete the window programming procedure? | Go to Step 4 | -- |
4 |
Does the DTC reset? | Go to Step 5 | |
5 | Inspect for poor connections at the inoperative window sensor/motor assembly harness connector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 9 | Go to Step 6 |
6 | Inspect for poor connections at the harness connector of the inoperative window door control module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 9 | Go to Step 7 |
7 | Test the power window status circuit for an open, short to ground, short to voltage, or high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 9 | Go to Step 8 |
8 | Replace the inoperative window sensor/motor assembly. Refer to Front Side Door Window Regulator Replacement or Rear Side Door Window Regulator Replacement . Did you complete the replacement? | Go to Step 9 | -- |
9 |
Does the DTC reset? | Go to Step 2 | System OK |
