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• continuity should exist. • Also check harness for short to ground and short to power. Is the check result normal? Yes >> Go to step 5. No >> Repair circuit for an open or short in harness or connectors. 5. CHECK KNOCK SENSOR SIGNAL • Connect knock sensor connector. • Check knock sensor (1) output signal as table shown. • Set digital multimeter to the voltage range. KNOCK SENSOR TERMINAL NO. TEST METHOD 1 & 2 Test Method 1: Knock at cylinder with rubber hammer Test Method 2: Knock at sensor slightly • Output signal voltage should exist. Is the check result normal? Yes >> Go to the next step. No >> Replace knock sensor. DIAGNOSIS & TESTING BESM030018 03
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