Symptom Troubleshooting Using Malfunctioning Circuit Functions

If a malfunction occurs in the immobilizer circuit, use the following table to cross-reference the malfunctioning function to the line(s) that should be checked:

FUNCTION CHART

Line error Function	+B line open	IG1 line open	LG1 line open	S-NET line open	Immobilizer Indicator line open	Immobilizer Indicator line short
Immobilizer Indicator	No blinking when ignition switch OFF	Does not come on	Does not come on	Blinking	Does not come on	Does not go off
Engine start	Possible	Impossible	Impossible	Impossible	Possible	Possible
Key registration	Impossible	Impossible	Impossible	Impossible	Possible	Possible
Tester communication	Possible	Impossible	Impossible	Possible	Possible	Possible