U0164

DTC U0164: Door Multiplex Control Unit Lost Communication with Climate Control Unit

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in 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 6 seconds or more.
4. Check for DTCs with the HDS.

Is DTC U0164 indicated?

YES - Go to step 5.

NO - Intermittent failure, the system is OK at this time. Check for loose or poor connections between the door multiplex control unit and climate control unit.

5. From the BODY ELECTRICAL system select menu, select UNIT INFORMATION, and then select CONNECTED UNIT to see if the gauge control module is communicating with the HDS.

Is the climate control unit detected?

YES - Replace the power window master switch.

NO - Go to step 6.

6. Turn the ignition switch to LOCK (0).
7. Disconnect the door multiplex control unit 37P connector.
8. Disconnect the climate control unit connector B (12P).
9. Check for continuity between the door multiplex control unit 37P connector No. 33 and No. 35 terminals and the climate control unit connector B (12P) No. 1 and No. 2 terminals individually.






Is there continuity?

YES - Replace the climate control unit.

NO - Repair an open in the wire.