Circuit Description
The switch or switch circuit that failed and generated this diagnostic trouble code (DTC) is wired to one of the passenger door modules. The passenger door modules each supply battery voltage to the contacts of both the Up and Down signal circuits of their respective power window switch. Each passenger door module also supplies a ground circuit to the associated power window switch. When the normally open contacts of the switch are closed to ground, the associated passenger door module interprets this switch signal and assigns it a digital message. The passenger door module then sends this message over the power door serial data circuit to the driver door module (DDM).
Conditions for Running the DTC
The DDM and the passenger door module associated with the failed power window must be powered and can not have B1327-Battery Voltage Low or B1328-Battery Voltage High set for one of these DTCs to set. If one of the DTCs indicating a loss of communications with a door module is set, the setting of DTCs from that module is prohibited.
Conditions for Setting the DTC
If the driver door module (DDM) receives a message from a passenger door module indicating that a window switch is closed for more than 15 continuous seconds , the DDM sets the DTC.
Action Taken When the DTC Sets
The action taken depends on which switch contacts are closed to ground:
| • | If an UP switch is closed for more than 15 seconds, both UP and DOWN movement is prohibited. |
| • | If a DOWN switch is closed for more than 15 seconds, the DOWN movement is prohibited but UP movement is permitted. |
Conditions for Clearing the DTC
The DDM clears this current DTC when the switch message is not received, or when the module power mode changes from OFF to RUN, and stores the DTC as history. The history DTC will clear either after 50 OFF/ON ignition switch cycles without a repeated failure, or in response to a scan tool command.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
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This step checks the module input state using the normal input status.
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This step checks to see that the input is seen by the module.
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This step checks to see that the signal lines to the module are open with the switch removed.
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This step checks to see that the signal circuits are not shorted.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Power Window Schematics | |||
1 | Did you perform the Door Systems Diagnostic System Check? | Go to Step 2 | |
Does the scan tool display Idle? | Go to Step 3 | Go to Step 4 | |
Does the Door Window Switch parameter change from Idle to Up and Down? | Go to Testing for Electrical Intermittents in Wiring Systems | Go to Step 4 | |
Does the scan tool display Idle? | Go to Step 7 | Go to Step 5 | |
Test the signal circuits of the appropriate passenger door window switch for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 10 | Go to Step 6 | |
6 | Inspect for poor connections at the harness connector of the appropriate passenger door control 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 10 | Go to Step 8 |
7 | Inspect for poor connections at the harness connector of the appropriate passenger door window switch. 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 10 | Go to Step 9 |
8 | Replace the appropriate passenger door control module. Refer to Door Control Module Replacement - Front . Door Control Module Replacement - Rear . Did you complete the replacement? | Go to Step 10 | -- |
9 | Replace the appropriate passenger door window switch. Refer to Front Door Switch Replacement or Rear Side Door Window Switch Replacement . Did you complete the replacement? | Go to Step 10 | -- |
10 |
Does the DTC reset? | Go to Step 2 | System OK |
