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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Diagnosis and testing
Trip computer, compass, and thermometer display module If the problem with the trip computer, compass, and thermometer display module is an inaccurate or scrambled display, use the Self-Diagnostic Test procedures. If the problem is incorrect display lighting levels, use a DRB scan tool and th ...