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8. CHECK IGNITION COIL GROUND CIRCUIT FOR AN OPEN • Turn ignition switch off. • Check harness continuity between ignition coil terminal 2 and ground. • Continuity should exist. Is the check result normal? Yes >> Go to step 10. No >> Go to the next step. 9. DETECT MALFUNCTIONING PART • Check harness for an open or short between ignition coil and ground. Is the check result normal? Yes >> Go to the next step. No >> Repair or replace the circuit for an open or short in harness or connectors. 10. CHECK IGNITION COIL INPUT SIGNAL CIRCUIT FOR AN OPEN OR SHORT • Disconnect ECM connector. • Check harness continuity between ECM terminal 10, 23 and ignition coil E-069, E-070, terminal 3. • Continuity should exist. • Check harness for short to power and short to ground. Is the check result normal? Yes >> Go to the next step. No >> Repair harness in harness or connectors. 11. CHECK IGNITION COIL • Check power transistor conducting state. • Use simulation resistance meter. • Connect the positive lead of the simulation resistance meter to the terminal of the power transistor. CAUTION: • Also check resistance between ignition coil terminals as table shown. • Also check ignition coil signal output. DIAGNOSIS & TESTING 03
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