Diagnostic Procedure

NOTE: When using self-diagnostic tests for diagnosis, DO NOT skip any steps or incorrect diagnosis may result. Always start with TEST FC-1A under SELF-DIAGNOSTIC TESTS.

Perform a visual inspection before attempting to diagnose engine control system problems. See VISUAL INSPECTION . Enter on-board diagnostics and retrieve fault codes. See ENTERING ON-BOARD DIAGNOSTICS . If fault codes are not present and/or DRB-II (Diagnostic Readout Box II) is used, proceed to TEST FC-1A under SELF-DIAGNOSTIC TESTS.