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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 B2B07 or B2B22-B2B24 >> Circuit/System Verification

Circuit/System Verification

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  1. Ignition ON.
  2. Verify DTCs B2B07, B2B22, B2B23 or B2B24 are not set.
    • If any of the DTCs are set 
      NOTE:

      Verify that there are no mechanical issues with the air control door or any associated components (linkage, cams, gears, etc.) BEFORE performing the recalibration procedure.

    1. Perform the Actuator Recalibration  procedure.
    2. Verify the DTC does not set.
      • If the DTC sets,

        Replace the M37P Programmable Mode Valve Actuator.

      • Go to next step: If the DTC does not set
    3. All OK.
    • Go to next step: If none of the DTCs are set 
  3. A fault is not currently present and may be an intermittent condition.
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