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Home >> Saturn >> 2003 >> Ion 2 4D Sedan, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing >> Computerized Engine Controls >> Engine Control Module >> ECM Harness Resistance
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ECM Harness Resistance

Turn ignition switch to LOCK position. Disconnect ECM and related component harness connectors. Check for open or short circuits between ECM harness connector terminal and component harness connector terminal. For connector terminal identification, see CONNECTOR IDENTIFICATION in SELF-DIAGNOSTICS - 2.2L ION article. See WIRING DIAGRAMS  . If harness is open or shorted, repair as necessary.

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