Diagnostic Aids
WARNING: This page is about a different car, the 2000 Isuzu VehiCROSS, 2000 Isuzu Trooper, 2000 Isuzu Rodeo, 2000 Isuzu Amigo, and 2000 Honda Passport. However, it is still accessible from the selected car via links, so may be relevant.
An open or short in injector circuit will set DTC. The open or short will also cause a misfire and inoperative injector. A misfire DTC will be set indicating which cylinder is malfunctioning. Excessively high or low long and short term fuel trim indicate the possibility of a bad injector. See INJECTOR COIL TEST in SYSTEM & COMPONENT TESTING article to check injector.