Circuit Description
The switch that failed and generated this diagnostic trouble code (DTC) is one of the window switches that is a built in part of the driver door switch assembly (DDSA). There are no external circuits. The DDSA contains a microprocessor which takes the signal generated by this switch and assigns a digital message to it. The DDSA then sends this message over the power door serial data line to the driver door module (DDM). The DDM examines the information and, either provides power and ground to its associated window motor and circuits to move the driver door window, or relays the information over the power door serial data line to the appropriate passenger door module to move the passenger door window. When a passenger door module receives the power door serial data command to operate its window, it examines the information and determines if conditions are correct for a window function to occur. If conditions are correct, it then provides power and ground to its associated window motor and circuits to move the window. The window motors are reversible. When an Up movement is requested, the module applies battery positive voltage to the Up circuit and ground to the Down circuit. For a Down movement, the module reverses the polarity, and applies battery positive voltage to the down circuit, and ground to the Up circuit.
Conditions for Running the DTC
The DDM and the DDSA must be powered and the DDM must not have DTCs B1327-Battery Low Voltage or B1328-Battery High Voltage set for this DTC to set.
Conditions for Setting the DTC
If the driver door module (DDM) receives the message that a DDSA window switch is closed for more than 15 continuous seconds the DDM sets this DTC.
Action Taken When the DTC Sets
The action taken depends on which switch contacts are closed:
| • | If a DDSA UP window switch is closed for more than 15 seconds, both UP and DOWN signals from that switch will be ignored until the input is no longer detected, or the ignition is cycled from Off to Run. |
| • | If a DDSA DOWN window switch is closed for more than 15 seconds, DOWN signals from that switch will be ignored until the input is no longer detected, or the ignition is cycled from Off to Run. The window UP function from that switch will still be operational. |
| • | If a DDSA Express window switch is closed for more than 15 seconds, express functions for that switch are disabled until the DDM no longer detects the input. |
| • | All passenger door windows will operate normally from their respective passenger door window switch. |
Conditions for Clearing the DTC
The DDM clears this current DTC when the switch signal is no longer received or the ignition is cycled from Off to Run.
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.
-
This step checks to see that the input is seen by the module.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Power Window Schematics and Door Control Module 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 Window Switch parameter change state? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 4 | |
4 | Inspect for poor connections at the driver door window switch (DDSA) harness connector. 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 6 | Go to Step 5 |
5 | Replace the driver door switch assembly (DDSA). Refer to Front Door Switch Replacement . Did you complete the replacement? | Go to Step 6 | -- |
6 |
Does the DTC reset? | Go to Step 2 | System OK |
