Check Power Transistor Input Signal Circuit

Ensure ignition is off. Disconnect ECM harness connector. Check for continuity between ECM connector terminal No. 1 and power transistor connector terminal "g" (White/Black wire). See Figure. If continuity is present, inspect ignition coil and power transistor. See the SYSTEM/COMPONENT TESTS - 1.6L article. Replace ignition coil and/or power transistor if necessary and perform FINAL CHECK . If continuity is not present, repair harness or connectors as necessary.