B2578

B2578 - Driver Window Not Calibrated/Lost Calibration

For a complete wiring diagram, refer to.

• When Monitored: Whenever the window motor is operating.

• Set Condition: When the door module has lost the parameters for window travel.






Theory of Operation

It is possible for this code to set if the battery or the door module was disconnected.

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

Test Step 1 - Test for an Intermittent Condition

• Turn the ignition ON.

• With the scan tool, record and erase DTCs

• Operate the driver window UP and DOWN several times.

• Wait 30 seconds.

• With the scan tool, check for DTCs.

Does the scan tool display B2578 - Driver Window Not Calibrated/Lost Calibration ?

Yes

• Go to Test Step 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. Refer to=> Non-DTC Based Diagnostics. Body Interior

Test Step 2 - Window Motor Not Calibrated

• Run the window to the full UP position and continue to hold the switch for an additional 2 seconds.

• Run the window to the full DOWN position and continue to hold the switch for an additional 2 seconds.

• Again run the window to the full UP position and continue to hold the switch for an additional 2 seconds.

• 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 Test Step 3

Yes

• Test complete.

• Perform the Body Verification Test. Refer to=> Non-DTC Based Diagnostics. Body Interior

Test Step 3 - Express Window Switch

• Turn the ignition OFF.

• 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. Refer to=> Non-DTC Based Diagnostics. Body Interior

No

• Replace the driver express window switch assembly.

• Perform the Body Verification Test. Refer to=> Non-DTC Based Diagnostics. Body Interior