Circuit Description
The driver door module (DDM) and passenger door module (PDM) provide the window motor control output functions. These output controls allow the DDM and PDM to command the power windows UP or DOWN. The driver and passenger door switch circuits provide inputs to the DDM or PDM when a window switch is activated UP or DOWN. When the DDM or PDM detects an active up or down input from a window switch, the DDM or PDM will command the window motor in the appropriate direction. Each door module accomplishes this by applying voltage to the window motor control circuit depending on the desired window direction. Each door module monitors the amount of current draw on the window motor circuit. If the DDM or PDM detects a short to voltage condition in a window motor control circuit greater than 45 amperes for longer than 1 second, a DTC is set.
Conditions for Setting the DTC
| • | The DDM or PDM detects current draw in a window motor control circuit greater than 45 amperes. |
| • | Condition must be present for longer than 1 second. |
Action Taken When the DTC Sets
| • | Stores a history DTC B2274 or B2275 in DDM or PDM memory. |
| • | These DTCs 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 DDM or PDM no longer detects current draw in a window motor control circuit greater than 45 amperes for longer than 1 second, and: |
| • | The DTC is cleared using the IPC clearing feature, or |
| • | The DTC is cleared using a scan tool. |
Diagnostic Aids
| • | The following conditions may cause an intermittent malfunction: |
| - | There is an intermittent sticking or binding condition on a window causing excessive current draw. |
| - | A window motor is shorted internally. |
| • | If the DTC does not reset after the code is cleared, then the problem may be intermittent. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems. |
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
Tests the window motor current draw.
-
Tests a window for proper operation. If a window sticks or binds, this condition must be repaired first.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Door Control Module Schematics Connector End View Reference: Power Door Systems Connector End Views | |||
1 | Did you perform the Door Systems Diagnostic System Check? | Go to Step 2 | |
Does the scan tool display greater than 45 amps? | Go to Step 3 | Go to Step 4 | |
Inspect the appropriate window for a sticking or binding condition. Did you find and correct the condition? | Go to Step 8 | Go to Step 5 | |
4 | Inspect for poor connections at the harness connector of the appropriate door module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 8 | Go to Step 6 |
5 | Inspect for poor connections at the harness connector of the appropriate window motor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 8 | Go to Step 7 |
6 | Replace the appropriate door module. Refer to Door Control Module Replacement . Did you complete the replacement? | Go to Step 8 | -- |
7 | Replace the appropriate window motor. Refer to Door Window Regulator Replacement . Did you complete the replacement? | Go to Step 8 | -- |
8 |
Does the DTC reset? | Go to Step 2 | System OK |
