Jeep Cherokee (XJ) 1984 - 2001 Service Manual

Jeep Cherokee (XJ) 1984 - 2001 Service Manual

Previous pageDepartment of transportation uniform tire quality grades

The following tire grading categories were established by the National Highway Traffic Safety Administration. The specific grade rating assigned by the tire's manufacturer in each category is shown ...

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Modes of operation
OPERATION As input signals to the Powertrain Control Module (PCM) change, the PCM adjusts its response to the output devices. For example, the PCM must calculate different injector pulse width and ignition timing for idle than it does for wide open throttle (WOT). The PCM will operate in two ...