This can range from a simple hand-held meter that provides a coded read-out of the various diagnostic functions, up to a large console computer-based unit costing thousands of dollars.įault codes usually appear after the “Check Engine” light has come on. A cable is plugged into the OBD-II connector and connected to a scanning tool.
OBD-II equipped vehicles have a connector located in the passenger compartment, usually accessible from the driver’s seat (under the dash above the hood release lever in the Grand Cherokee WJ). OBD-II, a new standard introduced in cars built after January 1, 1996, provides almost complete engine control and also monitors parts of the chassis, body and accessory components, as well as the diagnostic control network of the vehicle. OBD is an electronic system designed to control engine functions and diagnose engine problems or component failures, as well as minimize emissions. OBD systems are found in most vehicles in use today. Location and pinouts for the Diagnostics Connector Is something incorrect or missing? Please get in touch with us and we’ll fix it! OBD (On-Board Diagnostic) systems We have organized as much information as we could find into a helpful article below. Welcome to the in-depth page on WJ Generation Jeep Grand Cherokee diagnostic trouble codes.
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