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ECM Harness Resistance

WARNING: This page is about a different car, the 2003 Saturn Ion 3, 2003 Saturn Ion 2, and 2003 Saturn Ion 1. However, it is still accessible from the selected car via links, so may be relevant.

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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