PIN VOLTAGE CHARTS
Note. This article is generic in nature and all information does not apply to all vehicles. For vehicle specific information, see the appropriate articles in the ENGINE PERFORMANCE category.
These are supplied (when available from manufacturer) to quicken the diagnostic process. By checking pin voltages at the Powertrain Control Module (PCM), you can determine if the PCM is receiving and/or transmitting proper voltage signals. Pin charts may also be referred to as PID charts by some manufacturers.
SENSOR RANGE CHARTS
Note. This article is generic in nature and all information does not apply to all vehicles. For vehicle specific information, see the appropriate articles in the ENGINE PERFORMANCE category.
SENSOR OPERATING RANGE CHARTS
These are supplied (when available from manufacturer) to determine if a sensor is out of calibration. An out-of-calibration sensor may not set a trouble code, but it may cause driveability problems.
VACUUM HOSE DIAGRAM(S)
Note. This article is generic in nature and all information does not apply to all vehicles. For vehicle specific information, see the appropriate articles in the ENGINE PERFORMANCE category.
Here we give you underhood views or schematics of vacuum-hose routing which can help you find incorrectly routed hoses. Remember, a vacuum leak or incorrectly routed vacuum hose on computer-controlled vehicle can cause many driveability problems.
2002 & EARLIER
On 2002 and earlier models, once ENGINE PERFORMANCE is selected as the service category, the expanded menu will display a WIRING DIAGRAMS - ENGINE PERFORMANCE heading. Once the wiring diagrams article is selected, select the engine performance wiring diagrams for your lookup model.
2003 & LATER
On models newer than 2002, we have moved all wiring diagrams under a centralized first level model-specific lookup titled WIRING DIAGRAMS-ALL. When selected, SYSTEM WIRING DIAGRAMS article will display in the center panel. This article contains all available wiring diagrams related to the selected vehicle. These same wiring diagrams can also be found under the ELECTRICAL/WIRING DIAGRAMS heading.