Driver's MICU Lost Communication With Door Multiplex Control Unit

DTC Troubleshooting: U0199

DTC U0199:

Driver's MICU Lost Communication With Door Multiplex Control Unit

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A Troubleshooting - B-CAN System Diagnosis Test Mode A.

1. Clear the DTCs with the HDS.

2. Turn the ignition switch to LOCK (0) and then back to ON (II).

3. Wait for at least 6 seconds.

4. Check for DTCs with the HDS.

Is DTC U0199 indicated?

YES -

Go to the door multiplex control unit input test, and do all power, ground, and communication input test Drivers and Passengers MICU Input Tests. If the tests prove OK, replace the power window master switch, 4-door Power Window Master Switch Replacement (4-Door), 2-door Power Window Master Switch Replacement (2-Door).�

NO -

Intermittent failure, the system is OK at this time. Check for loose or poor connections at the door multiplex control unit 37P connector and the related units.�