GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2005 🢒 STS 🢒 Body 🢒 Doors 🢒 DTC B3160 or B3165

Circuit Description

The individual power window switches are monitored and controlled by the front and rear door modules. Each passenger door window switch is mounted to the trim panel of the appropriate passenger door. When a passenger window switch is operated, the switch contacts close and the associated door control module detects ground as a specific request to move the window up or down. If conditions are correct for window operation to occur, the door control module communicates the up/down command to the power window motor and the power window motor moves the window to the desired position. For more detailed information concerning power window operation refer to Power Windows Description and Operation .

DTC Descriptors

This diagnostic procedure supports the following DTCs:

    • DTC B3160 Window Up Switch Circuit
    • DTC B3165 Window Down Switch Circuit

This vehicle has DTCs which include DTC symptoms. For more information on DTC symptoms, refer to DTC Symptom Description in Vehicle DTC Information.

DTC Symptom

DTC Symptom Descriptor

02

Short to Ground

Conditions for Running the DTC
    • The PDM, LRDM, or RRDM must be powered.
    • DTC B1325 Battery Voltage Out of Range, must not be current.

Conditions for Setting the DTC

The PDM, LRDM, or RRDM detects that the window switch has been closed for 30 continuous seconds.

Action Taken When the DTC Sets
    • When DTC B3160 is current, the appropriate door module will ignore actuation of the WINDOW UP and WINDOW DOWN inputs.
    • When DTC B3165 is current, the appropriate door module will ignore actuation of the WINDOW DOWN input.

Conditions for Clearing the DTC
    • The door control module does not detect the failure for 6 consecutive seconds.
    • You issue a scan tool CLEAR DTCs command.
    • A history DTC will clear once 40 consecutive malfunction free ignition cycles have occurred.

Diagnostic Aids

Thoroughly inspect the wiring and connectors. An incomplete inspection of the wiring and connectors may result in misdiagnosis causing part replacement with the reappearance of the malfunction. If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Step

Action

Yes

No

Schematic Reference: Power Window Schematics and Door Control Module Schematics

Connector End View Reference: Power Door Systems Connector End Views

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

2
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With the scan tool, observe the suspect Window Switch parameter in the appropriate door control module data list:
    4. • Passenger Front Door Module (PDM)
    • Left Rear Door Module (LRDM)
    •  Right Rear Door Module (RRDM)

Does the scan tool display Idle?

Go to Step 3

Go to Step 4

3
  1. Activate the appropriate passenger door window switch.
  2. With the scan tool, observe the Window Switch parameter for the appropriate door control module.

Does the Window Switch parameter change state?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 4

4
  1. Turn OFF the ignition.
  2. Disconnect the appropriate passenger door window switch connector.
  3. Turn ON the ignition, with the engine OFF.
  4. With a scan tool, observe the Window Switch parameter for the appropriate door control module.

Does the scan tool display Idle?

Go to Step 7

Go to Step 5

5

Test the power window switch signal circuit(s) 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 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 door control module. Refer to Control Module References in Computer/Integrating Systems for replacement, setup and programming.

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
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.

Does the DTC reset?

Go to Step 2

System OK