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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 524 (Engine Controls/Fuel - 5.3L, 6.0L, 6.2L - Description And Operation) >> Description and Operation >> Engine Control Module Description >> ECM Service Precautions

ECM Service Precautions

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The ECM, by design, can withstand normal current draws that are associated with vehicle operations. However, care must be used in order to avoid overloading any of these circuits. When testing for opens or shorts, do not ground or apply voltage to any of the ECM circuits unless the diagnostic procedure instructs you to do so. These circuits should only be tested with a DMM unless the diagnostic procedure instructs otherwise.

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