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P2072-ELECTRONIC THROTTLE CONTROL SYSTEM - ICE BLOCKAGE For the Engine circuit diagram (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING). For a complete wiring diagram Refer to Section 8W. • When Monitored: • Set Condition: Possible Causes THROTTLE PLATE FROZEN Diagnostic Test 1. THROTTLE BODY INSPECTION Ignition on, engine not running. With a scan tool, read DTCs and record the related Freeze Frame data. NOTE: This DTC sets in extreme cold Ambient Temperatures with the throttle plate stuck by the time the NOTE: Diagnose any other DTCs that may also be set before continuing. Remove the Air Cleaner Assembly from the Throttle Body. Check for any signs of a foreign material (ice or dirt) on the Throttle Plate or in the bore causing the Throttle Plate Is the throttle blade still stuck because it is frozen? Yes >> Allow the Throttle Body to thaw naturally in a room temperature climate. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) No >> Test Complete. 9 - 798 ENGINE - ELECTRICAL DIAGNOSTICS - 3.7L/4.7L/5.7L DR/DH |