Jeep Cherokee (XJ): On-board diagnostics

Next pageEmission system. Malfunction indicator lamp (mil). State display test mode

Emission system OPERATION The Powertrain Control Module (PCM) monitors many different circuits in the fuel injection, ignition, emission and engine systems. If the PCM senses a problem with a moni ...

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Description and operation
Cooling system DESCRIPTION The cooling system regulates engine operating temperature. It allows the engine to reach normal operating temperature as quickly as possible, maintains normal operating temperature and prevents overheating. The cooling system also provides a means of heating the ...