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Home >> Cadillac >> 2007 >> XLR V >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 4.4L - DTC P0171 To DTC 00700 >> DTC P023A >> Circuit/System Verification
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Circuit/System Verification

Ignition ON, command the CAC coolant pump relay ON and OFF several times with a scan tool. Listen and feel for the CAC coolant pump relay to click with each command.

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