Refer to:
Circuit Description
The switch that failed and generated this diagnostic trouble code (DTC) is one of the window switches that is mounted locally in one of the passenger doors. The passenger front door module (PFDM), left rear door module (LRDM), and right rear door module (RRDM) each have a window switch that is wired to its associated door module. Each module contains a microprocessor which takes the ground signals generated by its switch, processes them, and then determines a course of action. If conditions are correct for window movement to take place, the appropriate door module then supplies battery voltage and ground to the appropriate window motor circuits to move the window Up or Down.
Conditions for Running the DTC
The PFDM, LRDM, and the RRDM must be powered and cannot have codes B1327-Battery Voltage Low or B1328-Battery Voltage High set for this DTC to set.
Conditions for Setting the DTC
If the PFDM, LRDM, or RRDM, receives a message indicating that a window switch Express contact is grounded for more than 15 continuous seconds, the DTC will set.
Action Taken When the DTC Sets
If the DTC is current, the PFDM, LRDM, or RRDM will ignore the Express Down inputs from the failed switch until the input is no longer detected. The module will still respond to Up and supervised Down inputs.
Conditions for Clearing the MIL/DTC
The PFDM, LRDM, or RRDM clears the DTC when the input is not detected for 60 seconds, or, when the ignition is cycled from OFF to RUN.
Diagnostic Aids
A sticking switch can cause this DTC to set.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Diagnostic System Check - Power Door Systems? | -- | Go to Step 2 | |
Does the scan tool display Idle? | -- | Go to Step 3 | Go to Step 4 | |
3 |
Does the Window Switch Inputs parameter change state? | -- | Go to Diagnostic Aids | Go to Step 4 |
4 |
Does the scan tool indicate the Idle state? | -- | Go to Step 7 | Go to Step 5 |
5 | Test the window Express Down input circuit of the door that set the code 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/terminal tension at the door module harness connector of the door that set the code. 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/terminal tension at the window switch harness connector of the door that set the code. 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 door module of the door that set the code. Refer to Door Control Module Replacement . Did you complete the replacement? | -- | Go to Step 10 | -- |
9 | Replace the window switch of the door that set the code. 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 |
