B2578

B2578-DRIVER WINDOW NOT CALIBRATED/LOST CALIBRATION

For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

This code will always set anytime the battery or the door module connector is disconnected.

- When Monitored:
Whenever the window motor is operating.

- Set Condition:
When the Door Module has lost the parameters for window travel, this code will set.





NOTE: If there are any other Power Window DTCs, repair them before continuing.

1. TEST FOR INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, record and erase the DTCs.
3. Operate the Driver Window up and down several times.
4. Wait 30 seconds.
5. With the scan tool, read the active DTCs.

Does the scan tool display B2578-DRIVER WINDOW NOT CALIBRATED/LOST CALIBRATION ?

Yes

- Go To 2

No

- The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. WINDOW MODULE NOT CALIBRATED
1. Run the window to the full up position and continue to hold the switch for an additional 2 seconds.
2. Run the window to the full down position and continue to hold the switch for an additional 2 seconds.
3. Again run the window to the full up position and continue to hold the switch for an additional 2 seconds.
4. Lower the window all the way down then press and release the switch to the express up position.

Did the window move to the full up position?

No

- Go To 3

Yes

- Test complete.

3. EXPRESS WINDOW SWITCH
1. Turn the ignition off.
2. Move the Driver Express Switch from the idle position to the up position and then to the express up position.

Is there two definite detent positions felt?

Yes

- Replace the Driver Door Module.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Replace the Driver Express Window Switch assembly.
- Perform the BODY VERIFICATION TEST. Body Verification Test.