HVAC System Fault Detected

Scan for DTCs with Diagnostic Tool

Identify DTC Category

Compressor Fault Path (B142X)

Check Fault Type

Check HV System Status

Measure Compressor Current Draw

Check HV Battery Voltage

Repair HV System Issues First

HV System OK?

Inspect Wiring & Connections

Wiring OK?

Repair/Replace Damaged Wiring

Test Compressor Replacement & Operation

Compressor OK?

Replace Compressor

Check for Mechanical Riding or Failure

Check Refrigerant Cover Diagnosed

Check HV Defective Connections

Voltage >200V?

Check HV Battery SOC & Health

Compressor Path

Check HV CONTROL MODULE

Clear DTCs & Perform Final Test

DTCs Cleared? System Operational?

Perform Advanced Diagnosis or Consult Tech Support

Repair Complete Document Work