( TL19E00K764000U0164FAAT00 )

DTC Troubleshooting: U0164

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

1. Clear the DTCs with the HDS.

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

1. Wait for 6 seconds or more.

1. 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/heater control unit.■

1. From the BODY ELECTRICAL system select menu, select UNIT INFORMATION, and then select CONNECTED UNIT to see if the climate control unit/heater control unit is communicating with the HDS.

Is the climate control unit/heater control unit detected?

YES | - | Replace the power window master switch. ■
NO | - | Go to Step 6 .

1. Turn the ignition switch to LOCK (0).

1. Disconnect the door multiplex control unit 37P connector.

1. Disconnect the climate control unit/heater control unit connector B (12P).

1. Check for continuity between the door multiplex control unit 37P connector No. 33 and No. 35 terminals and the climate control unit/heater control unit connector B (12P) No. 1 and No. 2 terminals individually.

Is there continuity?

YES | - | Replace the climate control unit/ heater control unit .■
NO | - | Repair an open in the wire.■