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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 167 (Engine Controls And Fuel - 3.6L (LGX LF4) - DTC P0650 To DTC P3436 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> Charge Air Cooler Coolant Pump Diagnosis >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify that DTC P023A, P23B, or P23C is not set.
    • If none of the DTCs are set 
  3. Verify the KR18 Charge Air Cooler Coolant Pump relay clicks and the M10 Charge Air Cooler Coolant Pump turns ON and OFF when commanding the Charge Air Cooler Coolant Pump ON and OFF with a scan tool.
    • If the relay does not click or the pump does not turn ON and OFF 

      Refer to Circuit/System Testing

    • If the relay clicks and the pump turns ON and OFF 
  4. All OK
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