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Home >> Isuzu >> 2004 >> Axiom Base, RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Diagnostic Information & Procedures >> General Description >> General Description (ECM and Sensors) >> ECM Service Precautions

ECM Service Precautions

The ECM is designed to withstand normal current draws associated with vehicle operation. Avoid overloading any circuit. When testing for opens and shorts, do not ground or apply voltage to any of the ECM's circuits unless instructed to do so. These circuits should only be tested using digital voltmeter J 39200. The ECM should remain connected to the ECM or to a recommended breakout box.