DTC : U0164, U1281, U128D (2016 2017 2018)
DTC U0164 : Door multiplex control unit lost communication with climate control unit
DTC U1281 : Door multiplex control unit lost communication with MICU
DTC U128D : Door multiplex control unit lost communication with gauge control module
NOTE:
- Refer to the DTC code shown on the display, and then inspect the connectors and terminals based on the instructions in the table below.
- The DTC may be stored due to the grounding failure or the power source failure at the transmitting control unit (the grounding inspection and the power source inspection on each control unit are required prior to this checking process).
| DTC Description | DTC |
|---|---|
| U0164 Door multiplex control unit lost communication with climate control unit | |
| U1281 Door multiplex control unit lost communication with MICU | |
| U128D Door multiplex control unit lost communication with gauge control module |
DTC (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 - Go to: Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks .
- Problem verification
-1. Clear the DTCs with the HDS.
Clear DTCs
- 2. Turn the vehicle to the OFF (LOCK) mode and then the ON mode.
- 3. Wait for at least 6 seconds.
- 4. Check for DTCs with the HDS.
DTC Description DTC U0164 Door multiplex control unit lost communication with climate control unit U1281 Door multiplex control unit lost communication with MICU U128D Door multiplex control unit lost communication with gauge control module Are any DTCs indicated?
YES
Go to step 2.
NO
Intermittent failure, the system is OK at this time. Check for loose or poor connections.
- Open wire check (B-CAN_H, B-CAN_L line)
-1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Disconnect the receiving control unit connector.
Power window master switch 37P connector - 3. Disconnect the transmitting control unit connectors.
Climate control unit connector A (32P) Gauge control module 32P connector Under-dash fuse/relay box connector M (12P) - 4. Check for continuity between the receiving control unit and the transmitting control unit on the B-CAN_H circuit and the B-CAN_L circuit as specified in the table while in the vehicle OFF (LOCK) mode.
DTC CIRCUIT
NAMERECEIVING CONTROL UNIT TRANSMITTING CONTROL UNIT U0164 Door multiplex control unit lost communication with climate control unit B-CAN_H Power window master switch 37P connector No. 28 -
Go to:
Power Window Master Switch Connector for Inputs and Outputs (2016 2017 2018) .Climate control unit connector A (32P) No. 23 -
Go to:
Climate Control Unit Connector for Inputs and Outputs (2016 2017 2018)B-CAN_L Power window master switch 37P connector No. 30 -
Go to:
Power Window Master Switch Connector for Inputs and Outputs (2016 2017 2018) .Climate control unit connector A (32P) No. 24 -
Go to:
Climate Control Unit Connector for Inputs and Outputs (2016 2017 2018)U1281 Door multiplex control unit lost communication with MICU B-CAN_H Power window master switch 37P connector No. 28 -
Go to:
Power Window Master Switch Connector for Inputs and Outputs (2016 2017 2018) .Under-Dash Fuse/Relay Box Connector M (12P) No. 7 B-CAN_L Power window master switch 37P connector No. 30 -
Go to:
Power Window Master Switch Connector for Inputs and Outputs (2016 2017 2018) .Under-Dash Fuse/Relay Box Connector M (12P) No. 1 U128D Door multiplex control unit lost communication with gauge control module B-CAN_H Power window master switch 37P connector No. 28 -
Go to:
Power Window Master Switch Connector for Inputs and Outputs (2016 2017 2018) .Gauge control module 32P connector No. 26 -
Go to:
Gauge Control Module Connector for Inputs and Outputs (2016 2017 2018) .B-CAN_L Power window master switch 37P connector No. 30 -
Go to:
Power Window Master Switch Connector for Inputs and Outputs (2016 2017 2018) .Gauge control module 32P connector No. 27 -
Go to:
Gauge Control Module Connector for Inputs and Outputs (2016 2017 2018) .Is there continuity?
YES
The B-CAN_L to B-CAN_H wire is OK. Go to step 3.
NO
Repair an open or high resistance in the B-CAN_H and/or B-CAN_L wire (S) between the receiving control unit and the transmitting control unit.
- Determine possible failure area (the receiving control unit or the transmitting control unit)
-1. Reconnect all connectors.
- 2. Turn the vehicle to the ON mode.
- 3. Clear the DTCs with the HDS.
Clear DTCs
- 4. Check for DTCs with the HDS.
DTC Description DTC U0164 Door multiplex control unit lost communication with climate control unit U1281 Door multiplex control unit lost communication with MICU U128D Door multiplex control unit lost communication with gauge control module Are any DTCs indicated?
YES
Check for loose terminals and poor connections in the power window master switch connector. Check is OK, replace the Power Window Master Switch - Removal and Installation .
NO
The power window master switch is OK at this time. Update or replace the transmitting control unit. (Refer to the DTC code shown on the display, and then replace the control unit based on the instructions in the table below.)
DTC TRANSMITTING CONTROL UNIT U0164 Door multiplex control unit lost communication with climate control unit Replace the climate control unit U1281 Door multiplex control unit lost communication with MICU Update or Replace the MICU U128D Door multiplex control unit lost communication with gauge control module Replace the gauge control module