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6. CHECK THE IAT SENSOR GROUND CIRCUIT FOR OPEN OR SHORT • Turn ignition switch off. • Disconnect ECM harness connector. • Check for harness continuity between following terminals. • For 1.6L engine, check continuity between IAT sensor terminal 1 and ECM terminal 17. IAT SENSOR CONNECTOR TERMINAL ECM CONNECTOR TERMINAL 1 17 • For 1.8L engine, check continuity between IAT sensor terminal 3 and ECM terminal 17. IAT SENSOR CONNECTOR TERMINAL ECM CONNECTOR TERMINAL 3 17 • Continuity should exist. • Check harness for short to power. Is the check result normal? Yes >> Go to the next step. No >> Repair circuit for an open or short to power in harness or connectors. DIAGNOSIS & TESTING 03
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