Test Procedures: Notes
NOTE:
For additional information on self-diagnostic system, see
appropriate TESTS W/CODES
article in the ENGINE
PERFORMANCE section.
Two different diagnostic modes are available through ECM. Mode I is used as a bulb check and malfunction warning. Mode II is self-diagnostic system, used to obtain trouble codes for component or circuit failures. Mode II also monitors air/fuel mixture ratio by using CHECK ENGINE light and Red LED on ECM.