Driver Door Module (DDM, DMFL/R)

B18BA-11 WINDOW CONTROL-CIRCUIT SHORT TO GROUND

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





Theory of Operation

If both of the Window Driver circuits (Up and Down) are grounded during a window movement command, the motor will be totally inoperative. To lower the window, voltage is applied to the Window Driver (Down) circuit and the Window Driver (UP) circuit remains grounded in the module. To drive the window up, the circuits are reversed.

- When Monitored: Whenever the module is awake.
- Set Conditions:
When both Window Driver circuits (Up and Down) are grounded during a window movement command, this code will set.





Diagnostic Test

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

Does the scan tool display; B18BA-11-WINDOW CONTROL - CIRCUIT SHORT TO GROUND as active?

Yes

- Go To 2

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals and correct pin tension.
- Perform the BODY VERIFICATION TEST. Body Verification Test .

2. WINDOW MOTOR SHORTED
1. With the scan tool, erase DTCs.
2. Turn the ignition off.
3. Disconnect the Driver Window Motor harness connector.
4. Turn the ignition on.
5. Operate the driver window switch up and down several times.
6. Wait 30 seconds.
7. With the scan tool, read active DTCs.

Does the scan tool display; B18BA-11-WINDOW CONTROL - CIRCUIT SHORT TO GROUND as active?

Yes

- Go To 3

No

- Replace the Driver Window Motor. Window Regulator.
- Perform the BODY VERIFICATION TEST. Body Verification Test .

3. (Q21) DRIVER WINDOW DRIVER DOWN CIRCUIT SHORTED TO GROUND




1. Turn the ignition off.
2. Disconnect the Driver Door Module C4 harness connector.
3. Measure the resistance between Ground and the (Q21) Driver Window Driver Down circuit.

Is the resistance below 10K Ohms?

Yes

- Repair the short to ground in the (Q21) Driver Window Driver Down circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test .

No

- Go To 4

4. (Q11) DRIVER WINDOW DRIVER UP CIRCUIT SHORTED TO GROUND




1. Measure the resistance between Ground and the (Q11) Driver Window Driver Up circuit.

Is the resistance below 10K Ohms?

Yes

- Repair the short to ground in the (Q11) Driver Window Driver Up circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test .

No

- Go To 5

5. (Q21) DRIVER WINDOW DRIVER DOWN CIRCUIT SHORTED TO THE (Q11) DRIVER WINDOW DRIVER UP CIRCUIT




1. Measure the resistance between the (Q21) Driver Window Driver Down circuit and the (Q11) Driver Window Driver Up circuit.

Is the resistance below 20K Ohms?

Yes

- Repair the short between the (Q21) Driver Window Driver Down circuit and the (Q11) Driver Window Driver Up circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test .

No

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