Component Function Check

IGNITION SIGNAL


Component Function Check

1.Inspection START
Turn ignition switch OFF, and restart engine.
Does the engine start?
YES-1 >> With CONSULT-III: GO TO 2.
YES-2 >> Without CONSULT-III: GO TO 3.
NO >> Go to Diagnosis Procedure.
2.CHECK IGNITION SIGNAL FUNCTION
With CONSULT-III
1. Perform "POWER BALANCE" in "ACTIVE TEST" mode with CONSULT-III.
2. Check that each circuit produces a momentary engine speed drop.
Is the Inspection result normal?
YES >> Inspection END
NO >> Go to Diagnosis Procedure.
3.CHECK IGNITION SIGNAL FUNCTION
Without CONSULT-III
1. Let engine idle.





2. Read the voltage signal between ECM harness connector terminals with an oscilloscope.






NOTE: The pulse cycle changes depending on rpm at idle.


Is the Inspection result normal?
YES >> Inspection END
NO >> Go to Diagnosis Procedure.