U113D

U113D - Lost Communication with Master Power Window Switch






For a complete wiring diagram, refer to.

• When Monitored: Whenever the module is awake.

• Set Condition: When one or both door modules have lost communication with the driver express window/door lock switch.






Test Step 1 - Test for an Intermittent Condition

• Ensure the battery is fully charged before proceeding.

• Turn the ignition ON.

• With the scan tool, record and erase the DTCs.

• Try to operate the front windows UP and DOWN several times from the drivers window switch.

• Wait 30 seconds.

• With the scan tool, read the DTCs.

Does the scan tool display U113D - Lost Communication With Master Power Window Switch?

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 - Fused B(+) Circuit Open






• Ensure fuse M26 in the TIPM is good before proceeding.

• With the scan tool, erase the DTCs.

• Turn the ignition OFF.

• Disconnect the driver window/door lock switch C1 connector.

• Turn the ignition ON.

• Using a 12 volt test lamp connected to ground, check the fused B (+) circuit in the driver window/door lock switch C1 connector.

Does the test lamp illuminate brightly?

No

• Repair the fused B (+) circuit for an open between the switch connector and the TIPM.

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

Yes

• Go to Test Step 3

Test Step 3 - Check the LIN Bus Circuit






• Measure the voltage between the LIN bus circuit and the driver window switch sense return circuit.

Is the voltage more than 8.0 volts?

No

• Go to Test Step 5

Yes

• Go to Test Step 4

Test Step 4 - LIN Bus Circuit Short to Voltage






• Turn the ignition OFF.

• Disconnect the driver door module C5 connector.

• Turn the ignition ON.

• Measure the voltage between ground and the LIN bus circuit.

Is there any voltage present?

Yes

• Repair the LIN bus circuit for a short to voltage.

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

No

• Replace the driver window switch.

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

Test Step 5 - Driver Window Switch Sense Return Circuit Open






• Using a 12 volt test lamp connected to 12 volts, check the driver window switch sense return circuit in the window switch connector.

Does the test lamp illuminate brightly?

Yes

• Go to Test Step 6

No

• Repair the driver window switch sense return circuit for an open.

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

Test Step 6 - LIN Bus Circuit Short to Ground






• Turn the ignition OFF.

• Measure the resistance between ground and the LIN bus circuit in the door module C5 connector.

Is the resistance less than 10k ohms?

Yes

• Repair the LIN bus circuit for a short to the ground.

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

No

• Go to Test Step 7

Test Step 7 - LIN Bus Circuit Open






• Measure the resistance of the LIN bus circuit between the door module C5 connector and the driver express window/door lock switch connector.

Is the resistance less than 2.0 ohms?

No

• Repair the LIN bus circuit for an open.

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

Yes

• Replace the driver door module.

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