DTC U2300-54; U2300-55; U2300-56; U2300-64: Climate Control Unit (Full-Auto Air Conditioner): Notes

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

DTC U2300:54, U2300:55, U2300:56, U2300:64 (CLIMATE CONTROL UNIT - FULL-AUTO AIR CONDITIONER) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	U2300:54: Configuration error (data not received) U2300:55: Configuration error (not configured) U2300:56: Configuration error (ineffective/non-interchangeable data read) U2300:64: Configuration error (error value read)
Detection condition	Climate control unit detects configuration data not record or data error
Fail-safe function	Sets the configuration value to the following fixed value With Dual Type Climate Control Unit Destination: North_America FSC_Types: FOW_and_LDW_and_HBC PTC heater: Not_Equipped EATC_Configuration (Water Pump): Without Water Pump ICA_Types: Normal_Type With Single Type Climate Control Unit Destination: North_America FSC_Types: LDW_and_HBC PTC heater: Not_Equipped ICA_Types: Normal_Type
Possible cause	NOTE: If power from the battery is interrupted, the climate control unit will go into a non-configured state because the memory for the configuration information is erased. If the ignition is switched ON (engine off) at this time, DTC U2300:55 is detected. Normally, the configuration is re-performed within 6 s after the ignition is switched ON (engine off). After performing the configuration, DTC U2300:55 will be cleared if the ignition is switched ON (engine off) after the ignition is switched off. Module configuration procedure was not completed properly Correct data cannot be received from instrument cluster Climate control unit malfunction
System wiring diagram	Not applicable