GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

Schematic Reference: Power Window Schematics

DEFINITION: This test is used when only the Express Up function of a window is inoperative. This test assumes that all DTCs have been diagnosed.

1

Did you perform the Door Systems Diagnostic System Check?

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Go to Step 2

Go to Diagnostic System Check - Door Systems

2

Verify that the Power Windows Inoperative- Express Up Function complaint is present.

Does the power windows express up system operate as described in the Description and Operation?

--

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

Go to Step 3

3

  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With the scan tool, observe the Driver LF Window Switch and Driver RF Window Switch parameters in the Driver Door Module, Inputs list.
  4. Operate both front door window switches on the driver door switch assembly (DDSA) to the Express Up position.

Did the parameters change from the Idle state to the Express Up state for both doors?

--

Go to Step 4

Go to Step 11

4

Is the window that does not operate in the Express Up mode the front passenger door window?

--

Go to Step 5

Go to Step 7

5

  1. With the scan tool, observe the Pass.Door Window Sw. parameter in the Driver Door Module, Inputs list.
  2. Operate the front passenger door window switch to the Express Up position.

Did the parameter change from the Idle state to the Express Up state?

--

Go to Step 6

Go to Step 13

6

  1. Disconnect the harness connector of the front passenger door window sensor/motor assembly.
  2. Measure the voltage from the power window high speed serial data circuit of the harness connector to a good ground.

Does the voltage measure within the specified value?

5.0-9.0 V

Go to Step 12

Go to Step 8

7

  1. Disconnect the harness connector of the driver door window sensor/motor assembly.
  2. Measure the voltage from the power window high speed serial data circuit of the harness connector to a good ground.

Does the voltage measure within the specified value?

5.0-9.0 V

Go to Step 12

Go to Step 8

8

Test the power window high speed serial data circuit for a short to ground, an open, or a high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 18

Go to Step 9

9

Test the power window high speed serial data circuit for a short to battery positive voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 18

Go to Step 10

10

Inspect for poor connections at the harness connector of the appropriate door 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 18

Go to Step 14

11

Inspect for poor connections at the harness connector of the driver door switch assembly (DDSA). 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 18

Go to Step 15

12

Inspect for poor connections at the harness connector of the inoperative window sensor/motor assembly. 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 18

Go to Step 16

13

Inspect for poor connections at the harness connector of the inoperative passenger front 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 18

Go to Step 17

14

Important: Test the battery positive voltage circuit of the appropriate window sensor for a short to ground before replacing the door module. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Replace the inoperative door module. Refer to Door Control Module Replacement .

Did you complete the replacement?

--

Go to Step 18

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15

Replace the inoperative driver door switch assembly (DDSA). Refer to Front Door Switch Replacement .

Did you complete the replacement?

--

Go to Step 18

--

16

Replace the inoperative window sensor/motor assembly. Refer to Front Side Door Window Regulator Replacement .

Did you complete the replacement?

--

Go to Step 18

--

17

Replace the inoperative passenger front door window switch. Refer to Front Door Switch Replacement .

Did you complete the replacement?

--

Go to Step 18

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18

  1. Re-initialize the window sensor/motor. Refer to Window Motor Programming - Express Function .
  2. Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 2