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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 28 (HVAC System - Automatic) >> Diagnostic Information and Procedures >> DTC P0645, P0646, or P0647: A/C Compressor Clutch Relay >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2015 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.

Compressor Clutch Test

  1. Ignition OFF, disconnect the Q2 A/C Compressor Clutch.
  2. Test for 3.9 - 4.3 Ω between terminals A and B
    • If not between 3.9 - 4.3 Ω 

      Replace the Q2 A/C Compressor Clutch.

    • If between 3.9 - 4.3 Ω 
  3. All OK.