U0164
DTC Troubleshooting: 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. 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 6 seconds or more.
4. Check for DTCs with the HDS.
Is DTC U0164 indicated?
YES - Go to the door multiplex control unit input test and check the power and grounds. If OK, replace the driver's power window master switch.
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.