Jeep Cherokee (XJ): High and low limits. Load value

Jeep Cherokee (XJ) 1984 - 2001 Service Manual > Emission control systems > On-board diagnostics > High and low limits. Load value

High and low limits

OPERATION

The PCM compares input signal voltages from each input device with established high and low limits for the device. If the input voltage is not within limits and other criteria are met, the PCM stores a diagnostic trouble code in memory. Other diagnostic trouble code criteria might include engine RPM limits or input voltages from other sensors or switches that must be present before verifying a diagnostic trouble code condition.

Load value

OPERATION

OPERATION

    Previous pageTrip definition. Component monitors. Non-monitored circuits

    Trip definition OPERATION The term "Trip" has different meanings depending on what the circumstances are. If the MIL (Malfunction Indicator Lamp) is OFF, a Trip is defined as when the Oxygen Senso ...

    Next pageEvaporative emission controls

    Description and operation Evaporation control system OPERATION The evaporation control system prevents the emission of fuel tank vapors into the atmosphere. When fuel evaporates in the fuel tank, t ...

    Other materials:

    Diagnosis and testing
    Fuel pump pressure test Use this test in conjunction with the Fuel Pump Capacity Test, Fuel Pressure Leak Down Test and Fuel Pump Amperage Test found elsewhere in this group. Check Valve Operation: The electric fuel pump outlet contains a one-way check valve to prevent fuel flow back into th ...