DTC U0199: Power Seat Control Unit 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 (see
TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A
).
- Clear the DTCs with the HDS.
- Turn the ignition switch to LOCK (0) and then back to ON (II).
- Wait for at least 6 seconds.
- Check for DTCs with the HDS.
Is DTC U0199 indicated?
YES -Go to step 5.
NO -Intermittent failure, the system is OK at this time. Check for loose or poor connections between the power seat control unit and the door multiplex control unit.
- From the BODY ELECTRICAL system select menu, select UNIT INFORMATION, and then select CONNECTED UNIT.
Is the power window master switch (door multiplex control unit) detected?
YES -Go to the POWER SEAT CONTROL UNIT INPUT TEST (see ).
NO -Go to step 6.
- Turn the ignition switch to LOCK (0).
- Disconnect the door multiplex control unit 37P connector.
- Disconnect power seat control unit connector A (40P).
- Check for continuity between power seat control unit connector A (40P) terminals No. 39 and No. 40 and door multiplex control unit 37P connector terminals No. 33 and No. 35 respectively.
Is there continuity?
YES -Replace the door multiplex control unit (see REAR POWER WINDOW SWITCH TEST ).
NO -An open or poor connection in the wire between the door multiplex control unit and the power seat control unit.