DTC U0180 (F and AUTO) (Climate Control Unit)

DTC U0180 or DTC indicator F and AUTO  : Climate Control Unit Lost communication with automatic lighting control unit-sensor

NOTE:  The DTC may be stored due to the grounding failure or the power source failure at the sunlight sensor (the grounding inspection and the power source inspection on each control unit are required prior to this checking process).

DTCs (AC)

1. Problem verification

   -1. Clear the DTC with the HDS.

   -2. Turn the vehicle to the OFF (LOCK) mode, 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 F and AUTO indicated?

   YES 

   Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. Check for loose wires or poor connections.

2. Open wire check (B-CAN_H line)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Disconnect the following connectors.

   Climate control unit connector A (32P)

   Sunlight sensor 5P connector

   -3. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Climate control unit connector A (32P): disconnected
   	Sunlight sensor 5P connector: disconnected
   Test point 1	Climate control unit connector A (32P) No. 23
   Test point 2	Sunlight sensor 5P connector (female terminals) No. 1:

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   The B-CAN_H wire is OK. Go to step 3.

   NO 

   Repair an open in the wire between the climate control unit and the sunlight sensor.

3. Open wire check (B-CAN_L line)

   -1. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Climate control unit connector A (32P): disconnected
   	Sunlight sensor 5P connector: disconnected
   Test point 1	Climate control unit connector A (32P) No. 24
   Test point 2	Sunlight sensor 5P connector (female terminals) No. 2:

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   The B-CAN_L wire is OK. Replace the sunlight sensor .

   NO 

   Repair an open in the wire between the climate control unit and the sunlight sensor.