Circuit Description
The RH Door Control Module (RDCM) provides the RH window motor control output functions. This output control allows the RDCM to command the RH power window UP or DOWN. The RH door switch circuit provides an input to the RDCM when the window switch is pressed UP or DOWN. When the RDCM detects an active window command from either the RH window switch or a window command message on the serial data line from the LH Door Control Module (LDCM), the RDCM will command the RH window motor in the appropriate direction. The RDCM accomplishes this by applying a ground or voltage to CKT 164 and CKT 165 depending on the desired window direction. The RDCM monitors the amount of current draw on the RH window motor circuit. If the current draw is not within the acceptable range, a malfunction is present and a DTC will set.
Conditions for Setting the DTC
| • | The RDCM detects a short to voltage condition in the RH window motor control circuit when the RH window motor is not activated. |
| • | Condition must be present for 120 ms. |
Action Taken When the DTC Sets
| • | Stores a history DTC B2275 in the RDCM memory. |
| • | This DTC can only be set as a history code even if the malfunction is current. |
| • | No driver warning message will be displayed for this DTC. |
Conditions for Clearing the DTC
| • | The RDCM no longer detects a short to voltage condition in the RH window motor control circuit for longer than 120 ms. |
| • | Use the IPC clearing DTCs feature. |
| • | Use a scan tool. |
Diagnostic Aids
| • | The following conditions may cause an intermittent malfunction: |
| - | There is an intermittent short to voltage in CKT 164 or CKT 165. |
| - | The RH window motor is shorted internally. |
| • | If the RH window motor circuit is shorted to voltage, the RH window will operate only in certain directions depending on what circuit was affected. |
| • | Using a scan tool, select RDCM inputs and monitor the window motor load while operating the RH window motor UP and DOWN. If the scan tool displays the window motor load as 0, then check the RH window motor circuit for opens. |
| • | If the DTC does not reset after the code is cleared, then the problem may be intermittent. Perform the tests shown while moving related wiring and connectors. This can often cause the malfunction to occur. Refer to Intermittents and Poor Connections . |
Test Description
The numbers below refer to the step numbers on the diagnostic table:
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Were you sent here from the Power Door Diagnostic System Check? | -- | ||
Is the voltage within the specified range in the UP and DOWN positions? | 10.0-14.0 V | |||
3 | Check for an open or short (to ground or voltage) in CKT 164 or CKT 165. Was a problem found and repaired? | -- | ||
4 | Replace the RH window motor. Refer to Door Window Regulator Replacement . Is the replacement complete? | -- | -- | |
5 |
Is the replacement complete? | -- | -- | |
6 | Check the power window motor circuit for an intermittent malfunction. Refer to Diagnostic Aids. Was a problem found and repaired? | -- | ||
7 |
Is the repair complete? | -- | -- |
