HVAC System Fault Detected

Scan for DTCs with Diagnostic Tool

Identify DTC Category

Compressor Fault Path (D142X)

Check Fault Type

Check HV System Status

Measure Compressor Current Draw

Check HV Battery Voltage

HV System OK?

Repair HV System Issues First

Inspect Wiring & Connections

Wiring OK?

Repair/Replace Damaged Wiring

Test Compressor Replacements & Operation

Compressor OK?

Replace Compressor

Check HV CONTROL MODULE

Check HV Battery SOC & Health

Check HV Discharge Connections

Clear DTCs & Perform Final Test

DTCs Cleared? System Operational?

Repair Complete Document Work

Perform Advanced Diagnostics or Consult Tech Support