GM Service Manual Online
For 1990-2009 cars only

Circuit Description

The switch that failed and generated this diagnostic trouble code (DTC) is wired to one of the passenger door modules. These modules contain a microprocessor which takes the signal generated by this switch and assigns a digital message to the switch signal. The door module then sends this message over the power door serial data link to the driver door module (DDM).

Conditions for Running the DTC

The DDM and the passenger door modules all must both 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 indicating that a window switch is closed for more than 15 continuous seconds from a passenger door module, the DDM sets the DTC.

Action Taken When the DTC Sets

The action taken depends on which switch is closed:

    • 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 number(s) below refer to the step number(s) on the diagnostic table.

  1. Check the module input state using the normal input status.

  2. Check to see that the input is seen by the module.

  3. Check to see that the signal lines to the module are open with the switch removed.

  4. Check to see that the signal circuits are not shorted.

Step

Action

Yes

No

Schematic References: Power Window Schematics and Door Control Module Schematics

1

Did you perform the Door Systems Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Door Systems

2

  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, observe the Door Window Switch parameter for the appropriate passenger door in the driver door module (DDM) data list.

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 Door Window Switch parameter for the appropriate passenger door.

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

4

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

Does the scan tool display Idle?

Go to Step 7

Go to Step 5

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 .

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