U113D

U113D-LOST COMMUNICATION WITH MASTER POWER WINDOW SWITCH





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

- 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, this code will set.





1. TEST FOR INTERMITTENT CONDITION

NOTE: Ensure the battery is fully charged before proceeding.

1. Turn the ignition on.
2. With the scan tool, record and erase the DTCs
3. Try to operate the Front Windows up and down several times from the Drivers Window Switch.
4. Wait 30 seconds.
5. With the scan tool, read the DTCs.

Does the scan tool display: U113D-LOST COMMUNICATION WITH MASTER POWER WINDOW SWITCH?

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. (A855) FUSED B(+) CIRCUIT OPEN





NOTE: Ensure Fuse M26 in the TIPM is good before proceeding.

1. With the scan tool, erase the DTCs.
2. Turn the ignition off.
3. Disconnect the Driver Window/Door Lock Switch C1 connector.
4. Turn the ignition on.
5. Using a 12-volt test light connected to Ground, check the (A855) Fused B(+) circuit in the Driver Window/Door Lock Switch C1 connector.

Does the test light illuminate brightly?

No

- Repair the (A855) Fused B(+) circuit for an open between the switch connector and the TIPM.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

Yes

- Go To 3

3. CHECK THE LIN BUS CIRCUIT




1. Measure the voltage between the (D903) LIN Bus circuit and the (Q911) Driver Window Switch Sense Return circuit.

Is the voltage above 8.0 volts?

No

- Go To 5

Yes

- Go To 4

4. (D903) LIN BUS CIRCUIT SHORT TO VOLTAGE




1. Turn the ignition off.
2. Disconnect the Driver Door Module C5 connector.
3. Turn the ignition on.
4. Measure the voltage between Ground and the (D903) LIN Bus circuit.

Is there any voltage present?

Yes

- Repair the (D903) LIN Bus circuit for a short to voltage.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Replace the Driver Window/Door Lock Switch.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

5. (Q911) DRIVER WINDOW SWITCH SENSE RETURN CIRCUIT OPEN




1. Using a 12-volt test light connected to 12-volts, check the (Q911) Driver Window Switch Sense Return circuit in the Window Switch connector.

Does the test light illuminate brightly?

Yes

- Go To 6

No

- Repair the (Q911) Driver Window Switch Sense Return circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

6. (D903) LIN BUS CIRCUIT SHORT TO GROUND




1. Turn the ignition off.
2. Measure the resistance between Ground and the (D903) LIN Bus circuit in the Door Module C5 connector.

Is the resistance below 10,000 ohms?

Yes

- Repair the (D903) LIN Bus circuit for a short to the ground.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 7

7. (D903) LIN BUS CIRCUIT OPEN




1. Measure the resistance of the (D903) LIN Bus circuit between the Door Module C5 connector and the Driver Express Window/Door Lock Switch connector.

Is the resistance below 2.0 ohms?

No

- Repair the (D903) LIN Bus circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

Yes

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