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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 231 (HVAC - Automatic) >> Diagnostic Information and Procedures >> DTC B2AEF or B2AF0-B2AF4 >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.

Q46 Air Conditioning Compressor Solenoid Valve

  1. Ignition OFF, disconnect the connector at the Q46 Air Conditioning Compressor Solenoid Valve.
  2. Test for 7 - 15 Ω between B+ terminal 2 and control terminal 1 at the Q46 Air Conditioning Compressor Solenoid Valve.
    • If less than 7 Ω or greater than 15 Ω 

      Replace the G1 Air Conditioning Compressor.

    • Go to next step: If between 7 - 15 Ω 
  3. Test for infinite resistance between each terminal and the Q46 Air Conditioning Compressor Solenoid Valve housing/case.
    • If less than infinite resistance 

      Replace the G1 Air Conditioning Compressor.

    • Go to next step: If infinite resistance 
  4. All OK.
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