Diagnostic Procedure
NOTE:
DO NOT
skip any steps in self-diagnostic tests or incorrect diagnosis may result.
Always perform a visual inspection before attempting to diagnose engine control system problems. See VISUAL INSPECTION . Enter on-board diagnostics, and retrieve fault code(s). See ENTERING ON-BOARD DIAGNOSTICS . If fault codes are not present and/or DRB-II (Diagnostic Readout Box-II) is used, proceed to one of the following tests:
- Go to TEST NS-1A - CHECKING FOR FAULTS & SPARK if a no-start condition exists or engine stalls after start-up. Perform indicated VERIFICATION TEST after repairs have been made.
- Go to TEST DR-1A - CHECKING SYSTEM FOR FAULTS if engine runs but has performance problems. Perform indicated VERIFICATION TEST after repairs have been made.
- Go to TEST NF-1A - NO FAULT CODE TEST MENU if a driveability problem exits and no fault codes are present. Perform indicated VERIFICATION TEST after repairs have been made.