DTC Troubleshooting: U0180 (92)
DTC U0180 or DTC indicator 92: Climate Control Unit Lost Communication with Automatic Lighting Control Unit-Sensor
NOTE:
According to the detected DTC(s), check for the power circuit and the ground circuit of the control unit which cannot communicate with the climate control unit.
Refer to the DTC shown on the display, then inspect the connectors and terminals based on the instructions.

DTC Description
DTC
U0180 Climate control unit lost communication with automatic lighting control unit-sensor
  

1.
Problem verification:

Problem verification
?1.
Clear the DTC with the HDS.


?2.
Turn the vehicle to the OFF (LOCK) mode and then the ON mode.

?3.
Wait for at least 6 seconds.

?4.
Do the Self-Diagnostic Function with the HDS or the climate control unit.

?5.
Check for DTCs.
DTC Description
DTC
U0180 Climate control unit lost communication with automatic lighting control unit-sensor
  

Is DTC U0180 or DTC indicator 92 indicated?

     
YES
     
     
     
The failure is duplicated. Go to step 2.
     
NO
     
     
     
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the transmitting control units and the climate control unit.?
2.
Open wire check (B-CAN_H line, B-CAN_L line):

Open wire check (B-CAN_H line, B-CAN_L line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the receiving control unit connector.
Climate control unit 32P connector

?3.
Disconnect the transmitting control unit connector(s).
Refer to the DTC shown on the display, then disconnect the connector(s) based on the instructions (see table).

DTC
Connector
U0180
Automatic lighting control unit-sensor 5P connector

?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.
Test condition
Vehicle OFF (LOCK) mode
Climate control unit 32P connector: disconnected
Transmitting control unit connector(s) for indicated DTCs: disconnected

DTC
Circuit name
Test point 1 (Receiving control unit)
Test point 2 (Transmitting control unit)
Connector
Terminal
Connector
Terminal
U0180
B-CAN_H
Climate control unit 32P connector
No. 19
Automatic lighting control unit-sensor 5P connector
No. 1
B-CAN_L
No. 21
No. 2

Is there continuity?

     
YES
     
     
     
The B-CAN_H wire and B-CAN_L wire is OK.
Refer to the DTC shown on the display, then substitute or replace the control unit based on the instructions (see table).?
DTC
Operation for transmitting control unit
U0180
Substitute a known-good automatic lighting control unit-sensor, then recheck. If DTC U0180 goes away after substitution, replace the original automatic lighting control unit-sensor.
     
NO
     
     
     
Repair an open in the B-CAN_H wire and/or the B-CAN_L wire between the climate control unit and the transmitting control unit.?