Automotive Troubleshooting Ignition and Glow System Inspection
Inspection method (gasoline engine)
Remove the spark plug and crank the engine to check for a spark at the tip of the plug and the spark’s strength.
Before inspecting, remove the injector connector so that fuel does not inject.
Criteria
• A spark appears at the tip of the spark plug, and there is no electrical leak.
• To judge the strength of the spark, compare with a spark plug from a normal
engine and if a large difference is not found, it should be normal.
Pay attention to the strength of the spark in normal engines on a daily basis.
Inspection method (diesel engines)
Inspect the following in the glow system.
• Lighting time of the glow indicator lamp
• Pre-heat function
• After-glow function
For this procedure, refer to the Repair Manual.