On-Board Diagnostic II (OBD-II) System Check: Description
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2000 Isuzu VehiCROSS, 2000 Isuzu Trooper, 2000 Isuzu Rodeo, 2000 Isuzu Hombre, and 2000 Isuzu Amigo. However, it is still accessible from the selected car via links, so may be relevant.
The On-Board Diagnostic II (OBD-II) System Check is the starting point for any driveability complaint diagnosis. The OBD-II system check is an organized approach to identifying problems created by an electronic engine control system malfunction. Before any DTC(s) are retrieved, perform a visual underhood inspection, checking battery and grounds for clean and tight connections. Check for poor connections or damage to wiring harness and electrical connectors. Check for corroded terminals or corrosion buildup on any connection. Repair as necessary.
Use of TECH II scan tool or equivalent is required to perform ON-BOARD DIAGNOSTIC II (OBD-II) SYSTEM CHECK .
NOTE:
To identify component terminals and wire colors referenced in testing, see appropriate wiring diagram in SYSTEM WIRING DIAGRAMS
article.