Basic System Test
- If engine will not start and starter will not crank engine, check battery, main fuse and electrical wiring. Check starter circuit wiring and ignition switch.
- If engine will not start, but starter cranks engine, hold coil wire 1/4" from coil tower while cranking engine. If there is spark from coil, then hold spark plug wire terminal 1/4" from spark plug while cranking engine.
- If there is no spark at plug, check spark plug wire condition, inspect distributor cap or rotor. If spark exists, check fuel system, spark plugs, ignition timing or valve timing.
- If there was no spark at the coil in step 2), check voltage between coil primary winding positive terminal and ground with ignition on. Battery voltage should be found. If not, check wiring from ignition switch to ignition coil.
- If battery voltage exists, check voltage between coil primary winding negative terminal and ground with ignition on. Again, battery voltage should exist. If not, check wiring from coil primary negative terminal to igniter. Also check coil primary resistance.
- If battery voltage was present at negative terminal, check voltage between coil positive and negative terminals with engine cranking. Reading should be 1-3 volts. If within specifications, check primary and secondary coil resistance, as well as spark plug wire resistance.
- If voltage in step 6) was not 1-3 volts, disconnect igniter connector. See Fig 2. Check voltage on coil side of connector between Black and Blue wires and Black and Black/Yellow wires. Battery voltage should exist with ignition on.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
- If not, check wiring from ignition coil to igniter. If battery voltage is present, disconnect connectors from igniter and pulse generator. Check continuity of both Red and Blue wires between igniter and pulse generator.
- If continuity exists, check resistance of pulse generator. Resistance should be 600-800 ohms. If within specifications, replace igniter and repeat spark test.