General Information

Air Conditioner
B1801 E-Comp Fault (Low_Voltage) - General Information

Component Location





General Description

The A/C Control Unit may control the E-compressor through the local CAN communication(Comp CAN, not a Chassis CAN). The A/C Control Unit may give the E-Compressor a target RPM to be functioned, and then the E-compressor gives the A/C Control Unit its RPM, voltage, current, consumption power and so on.

DTC Description

DTC B1801 will set if the vehicle voltage level that enters in the E-Comp is lower than the prescribed level.

DTC Detecting Condition





Diagnostic Circuit Diagram